diff options
Diffstat (limited to 'builtin-apply.c')
| -rw-r--r-- | builtin-apply.c | 3639 |
1 files changed, 0 insertions, 3639 deletions
diff --git a/builtin-apply.c b/builtin-apply.c deleted file mode 100644 index c8372a0a80..0000000000 --- a/builtin-apply.c +++ /dev/null @@ -1,3639 +0,0 @@ -/* - * apply.c - * - * Copyright (C) Linus Torvalds, 2005 - * - * This applies patches on top of some (arbitrary) version of the SCM. - * - */ -#include "cache.h" -#include "cache-tree.h" -#include "quote.h" -#include "blob.h" -#include "delta.h" -#include "builtin.h" -#include "string-list.h" -#include "dir.h" -#include "parse-options.h" - -/* - * --check turns on checking that the working tree matches the - * files that are being modified, but doesn't apply the patch - * --stat does just a diffstat, and doesn't actually apply - * --numstat does numeric diffstat, and doesn't actually apply - * --index-info shows the old and new index info for paths if available. - * --index updates the cache as well. - * --cached updates only the cache without ever touching the working tree. - */ -static const char *prefix; -static int prefix_length = -1; -static int newfd = -1; - -static int unidiff_zero; -static int p_value = 1; -static int p_value_known; -static int check_index; -static int update_index; -static int cached; -static int diffstat; -static int numstat; -static int summary; -static int check; -static int apply = 1; -static int apply_in_reverse; -static int apply_with_reject; -static int apply_verbosely; -static int no_add; -static const char *fake_ancestor; -static int line_termination = '\n'; -static unsigned int p_context = UINT_MAX; -static const char * const apply_usage[] = { - "git apply [options] [<patch>...]", - NULL -}; - -static enum ws_error_action { - nowarn_ws_error, - warn_on_ws_error, - die_on_ws_error, - correct_ws_error, -} ws_error_action = warn_on_ws_error; -static int whitespace_error; -static int squelch_whitespace_errors = 5; -static int applied_after_fixing_ws; - -static enum ws_ignore { - ignore_ws_none, - ignore_ws_change, -} ws_ignore_action = ignore_ws_none; - - -static const char *patch_input_file; -static const char *root; -static int root_len; -static int read_stdin = 1; -static int options; - -static void parse_whitespace_option(const char *option) -{ - if (!option) { - ws_error_action = warn_on_ws_error; - return; - } - if (!strcmp(option, "warn")) { - ws_error_action = warn_on_ws_error; - return; - } - if (!strcmp(option, "nowarn")) { - ws_error_action = nowarn_ws_error; - return; - } - if (!strcmp(option, "error")) { - ws_error_action = die_on_ws_error; - return; - } - if (!strcmp(option, "error-all")) { - ws_error_action = die_on_ws_error; - squelch_whitespace_errors = 0; - return; - } - if (!strcmp(option, "strip") || !strcmp(option, "fix")) { - ws_error_action = correct_ws_error; - return; - } - die("unrecognized whitespace option '%s'", option); -} - -static void parse_ignorewhitespace_option(const char *option) -{ - if (!option || !strcmp(option, "no") || - !strcmp(option, "false") || !strcmp(option, "never") || - !strcmp(option, "none")) { - ws_ignore_action = ignore_ws_none; - return; - } - if (!strcmp(option, "change")) { - ws_ignore_action = ignore_ws_change; - return; - } - die("unrecognized whitespace ignore option '%s'", option); -} - -static void set_default_whitespace_mode(const char *whitespace_option) -{ - if (!whitespace_option && !apply_default_whitespace) - ws_error_action = (apply ? warn_on_ws_error : nowarn_ws_error); -} - -/* - * For "diff-stat" like behaviour, we keep track of the biggest change - * we've seen, and the longest filename. That allows us to do simple - * scaling. - */ -static int max_change, max_len; - -/* - * Various "current state", notably line numbers and what - * file (and how) we're patching right now.. The "is_xxxx" - * things are flags, where -1 means "don't know yet". - */ -static int linenr = 1; - -/* - * This represents one "hunk" from a patch, starting with - * "@@ -oldpos,oldlines +newpos,newlines @@" marker. The - * patch text is pointed at by patch, and its byte length - * is stored in size. leading and trailing are the number - * of context lines. - */ -struct fragment { - unsigned long leading, trailing; - unsigned long oldpos, oldlines; - unsigned long newpos, newlines; - const char *patch; - int size; - int rejected; - struct fragment *next; -}; - -/* - * When dealing with a binary patch, we reuse "leading" field - * to store the type of the binary hunk, either deflated "delta" - * or deflated "literal". - */ -#define binary_patch_method leading -#define BINARY_DELTA_DEFLATED 1 -#define BINARY_LITERAL_DEFLATED 2 - -/* - * This represents a "patch" to a file, both metainfo changes - * such as creation/deletion, filemode and content changes represented - * as a series of fragments. - */ -struct patch { - char *new_name, *old_name, *def_name; - unsigned int old_mode, new_mode; - int is_new, is_delete; /* -1 = unknown, 0 = false, 1 = true */ - int rejected; - unsigned ws_rule; - unsigned long deflate_origlen; - int lines_added, lines_deleted; - int score; - unsigned int is_toplevel_relative:1; - unsigned int inaccurate_eof:1; - unsigned int is_binary:1; - unsigned int is_copy:1; - unsigned int is_rename:1; - unsigned int recount:1; - struct fragment *fragments; - char *result; - size_t resultsize; - char old_sha1_prefix[41]; - char new_sha1_prefix[41]; - struct patch *next; -}; - -/* - * A line in a file, len-bytes long (includes the terminating LF, - * except for an incomplete line at the end if the file ends with - * one), and its contents hashes to 'hash'. - */ -struct line { - size_t len; - unsigned hash : 24; - unsigned flag : 8; -#define LINE_COMMON 1 -}; - -/* - * This represents a "file", which is an array of "lines". - */ -struct image { - char *buf; - size_t len; - size_t nr; - size_t alloc; - struct line *line_allocated; - struct line *line; -}; - -/* - * Records filenames that have been touched, in order to handle - * the case where more than one patches touch the same file. - */ - -static struct string_list fn_table; - -static uint32_t hash_line(const char *cp, size_t len) -{ - size_t i; - uint32_t h; - for (i = 0, h = 0; i < len; i++) { - if (!isspace(cp[i])) { - h = h * 3 + (cp[i] & 0xff); - } - } - return h; -} - -/* - * Compare lines s1 of length n1 and s2 of length n2, ignoring - * whitespace difference. Returns 1 if they match, 0 otherwise - */ -static int fuzzy_matchlines(const char *s1, size_t n1, - const char *s2, size_t n2) -{ - const char *last1 = s1 + n1 - 1; - const char *last2 = s2 + n2 - 1; - int result = 0; - - if (n1 < 0 || n2 < 0) - return 0; - - /* ignore line endings */ - while ((*last1 == '\r') || (*last1 == '\n')) - last1--; - while ((*last2 == '\r') || (*last2 == '\n')) - last2--; - - /* skip leading whitespace */ - while (isspace(*s1) && (s1 <= last1)) - s1++; - while (isspace(*s2) && (s2 <= last2)) - s2++; - /* early return if both lines are empty */ - if ((s1 > last1) && (s2 > last2)) - return 1; - while (!result) { - result = *s1++ - *s2++; - /* - * Skip whitespace inside. We check for whitespace on - * both buffers because we don't want "a b" to match - * "ab" - */ - if (isspace(*s1) && isspace(*s2)) { - while (isspace(*s1) && s1 <= last1) - s1++; - while (isspace(*s2) && s2 <= last2) - s2++; - } - /* - * If we reached the end on one side only, - * lines don't match - */ - if ( - ((s2 > last2) && (s1 <= last1)) || - ((s1 > last1) && (s2 <= last2))) - return 0; - if ((s1 > last1) && (s2 > last2)) - break; - } - - return !result; -} - -static void add_line_info(struct image *img, const char *bol, size_t len, unsigned flag) -{ - ALLOC_GROW(img->line_allocated, img->nr + 1, img->alloc); - img->line_allocated[img->nr].len = len; - img->line_allocated[img->nr].hash = hash_line(bol, len); - img->line_allocated[img->nr].flag = flag; - img->nr++; -} - -static void prepare_image(struct image *image, char *buf, size_t len, - int prepare_linetable) -{ - const char *cp, *ep; - - memset(image, 0, sizeof(*image)); - image->buf = buf; - image->len = len; - - if (!prepare_linetable) - return; - - ep = image->buf + image->len; - cp = image->buf; - while (cp < ep) { - const char *next; - for (next = cp; next < ep && *next != '\n'; next++) - ; - if (next < ep) - next++; - add_line_info(image, cp, next - cp, 0); - cp = next; - } - image->line = image->line_allocated; -} - -static void clear_image(struct image *image) -{ - free(image->buf); - image->buf = NULL; - image->len = 0; -} - -static void say_patch_name(FILE *output, const char *pre, - struct patch *patch, const char *post) -{ - fputs(pre, output); - if (patch->old_name && patch->new_name && - strcmp(patch->old_name, patch->new_name)) { - quote_c_style(patch->old_name, NULL, output, 0); - fputs(" => ", output); - quote_c_style(patch->new_name, NULL, output, 0); - } else { - const char *n = patch->new_name; - if (!n) - n = patch->old_name; - quote_c_style(n, NULL, output, 0); - } - fputs(post, output); -} - -#define CHUNKSIZE (8192) -#define SLOP (16) - -static void read_patch_file(struct strbuf *sb, int fd) -{ - if (strbuf_read(sb, fd, 0) < 0) - die_errno("git apply: failed to read"); - - /* - * Make sure that we have some slop in the buffer - * so that we can do speculative "memcmp" etc, and - * see to it that it is NUL-filled. - */ - strbuf_grow(sb, SLOP); - memset(sb->buf + sb->len, 0, SLOP); -} - -static unsigned long linelen(const char *buffer, unsigned long size) -{ - unsigned long len = 0; - while (size--) { - len++; - if (*buffer++ == '\n') - break; - } - return len; -} - -static int is_dev_null(const char *str) -{ - return !memcmp("/dev/null", str, 9) && isspace(str[9]); -} - -#define TERM_SPACE 1 -#define TERM_TAB 2 - -static int name_terminate(const char *name, int namelen, int c, int terminate) -{ - if (c == ' ' && !(terminate & TERM_SPACE)) - return 0; - if (c == '\t' && !(terminate & TERM_TAB)) - return 0; - - return 1; -} - -/* remove double slashes to make --index work with such filenames */ -static char *squash_slash(char *name) -{ - int i = 0, j = 0; - - while (name[i]) { - if ((name[j++] = name[i++]) == '/') - while (name[i] == '/') - i++; - } - name[j] = '\0'; - return name; -} - -static char *find_name(const char *line, char *def, int p_value, int terminate) -{ - int len; - const char *start = line; - - if (*line == '"') { - struct strbuf name = STRBUF_INIT; - - /* - * Proposed "new-style" GNU patch/diff format; see - * http://marc.theaimsgroup.com/?l=git&m=112927316408690&w=2 - */ - if (!unquote_c_style(&name, line, NULL)) { - char *cp; - - for (cp = name.buf; p_value; p_value--) { - cp = strchr(cp, '/'); - if (!cp) - break; - cp++; - } - if (cp) { - /* name can later be freed, so we need - * to memmove, not just return cp - */ - strbuf_remove(&name, 0, cp - name.buf); - free(def); - if (root) - strbuf_insert(&name, 0, root, root_len); - return squash_slash(strbuf_detach(&name, NULL)); - } - } - strbuf_release(&name); - } - - for (;;) { - char c = *line; - - if (isspace(c)) { - if (c == '\n') - break; - if (name_terminate(start, line-start, c, terminate)) - break; - } - line++; - if (c == '/' && !--p_value) - start = line; - } - if (!start) - return squash_slash(def); - len = line - start; - if (!len) - return squash_slash(def); - - /* - * Generally we prefer the shorter name, especially - * if the other one is just a variation of that with - * something else tacked on to the end (ie "file.orig" - * or "file~"). - */ - if (def) { - int deflen = strlen(def); - if (deflen < len && !strncmp(start, def, deflen)) - return squash_slash(def); - free(def); - } - - if (root) { - char *ret = xmalloc(root_len + len + 1); - strcpy(ret, root); - memcpy(ret + root_len, start, len); - ret[root_len + len] = '\0'; - return squash_slash(ret); - } - - return squash_slash(xmemdupz(start, len)); -} - -static int count_slashes(const char *cp) -{ - int cnt = 0; - char ch; - - while ((ch = *cp++)) - if (ch == '/') - cnt++; - return cnt; -} - -/* - * Given the string after "--- " or "+++ ", guess the appropriate - * p_value for the given patch. - */ -static int guess_p_value(const char *nameline) -{ - char *name, *cp; - int val = -1; - - if (is_dev_null(nameline)) - return -1; - name = find_name(nameline, NULL, 0, TERM_SPACE | TERM_TAB); - if (!name) - return -1; - cp = strchr(name, '/'); - if (!cp) - val = 0; - else if (prefix) { - /* - * Does it begin with "a/$our-prefix" and such? Then this is - * very likely to apply to our directory. - */ - if (!strncmp(name, prefix, prefix_length)) - val = count_slashes(prefix); - else { - cp++; - if (!strncmp(cp, prefix, prefix_length)) - val = count_slashes(prefix) + 1; - } - } - free(name); - return val; -} - -/* - * Does the ---/+++ line has the POSIX timestamp after the last HT? - * GNU diff puts epoch there to signal a creation/deletion event. Is - * this such a timestamp? - */ -static int has_epoch_timestamp(const char *nameline) -{ - /* - * We are only interested in epoch timestamp; any non-zero - * fraction cannot be one, hence "(\.0+)?" in the regexp below. - * For the same reason, the date must be either 1969-12-31 or - * 1970-01-01, and the seconds part must be "00". - */ - const char stamp_regexp[] = - "^(1969-12-31|1970-01-01)" - " " - "[0-2][0-9]:[0-5][0-9]:00(\\.0+)?" - " " - "([-+][0-2][0-9][0-5][0-9])\n"; - const char *timestamp = NULL, *cp; - static regex_t *stamp; - regmatch_t m[10]; - int zoneoffset; - int hourminute; - int status; - - for (cp = nameline; *cp != '\n'; cp++) { - if (*cp == '\t') - timestamp = cp + 1; - } - if (!timestamp) - return 0; - if (!stamp) { - stamp = xmalloc(sizeof(*stamp)); - if (regcomp(stamp, stamp_regexp, REG_EXTENDED)) { - warning("Cannot prepare timestamp regexp %s", - stamp_regexp); - return 0; - } - } - - status = regexec(stamp, timestamp, ARRAY_SIZE(m), m, 0); - if (status) { - if (status != REG_NOMATCH) - warning("regexec returned %d for input: %s", - status, timestamp); - return 0; - } - - zoneoffset = strtol(timestamp + m[3].rm_so + 1, NULL, 10); - zoneoffset = (zoneoffset / 100) * 60 + (zoneoffset % 100); - if (timestamp[m[3].rm_so] == '-') - zoneoffset = -zoneoffset; - - /* - * YYYY-MM-DD hh:mm:ss must be from either 1969-12-31 - * (west of GMT) or 1970-01-01 (east of GMT) - */ - if ((zoneoffset < 0 && memcmp(timestamp, "1969-12-31", 10)) || - (0 <= zoneoffset && memcmp(timestamp, "1970-01-01", 10))) - return 0; - - hourminute = (strtol(timestamp + 11, NULL, 10) * 60 + - strtol(timestamp + 14, NULL, 10) - - zoneoffset); - - return ((zoneoffset < 0 && hourminute == 1440) || - (0 <= zoneoffset && !hourminute)); -} - -/* - * Get the name etc info from the ---/+++ lines of a traditional patch header - * - * FIXME! The end-of-filename heuristics are kind of screwy. For existing - * files, we can happily check the index for a match, but for creating a - * new file we should try to match whatever "patch" does. I have no idea. - */ -static void parse_traditional_patch(const char *first, const char *second, struct patch *patch) -{ - char *name; - - first += 4; /* skip "--- " */ - second += 4; /* skip "+++ " */ - if (!p_value_known) { - int p, q; - p = guess_p_value(first); - q = guess_p_value(second); - if (p < 0) p = q; - if (0 <= p && p == q) { - p_value = p; - p_value_known = 1; - } - } - if (is_dev_null(first)) { - patch->is_new = 1; - patch->is_delete = 0; - name = find_name(second, NULL, p_value, TERM_SPACE | TERM_TAB); - patch->new_name = name; - } else if (is_dev_null(second)) { - patch->is_new = 0; - patch->is_delete = 1; - name = find_name(first, NULL, p_value, TERM_SPACE | TERM_TAB); - patch->old_name = name; - } else { - name = find_name(first, NULL, p_value, TERM_SPACE | TERM_TAB); - name = find_name(second, name, p_value, TERM_SPACE | TERM_TAB); - if (has_epoch_timestamp(first)) { - patch->is_new = 1; - patch->is_delete = 0; - patch->new_name = name; - } else if (has_epoch_timestamp(second)) { - patch->is_new = 0; - patch->is_delete = 1; - patch->old_name = name; - } else { - patch->old_name = patch->new_name = name; - } - } - if (!name) - die("unable to find filename in patch at line %d", linenr); -} - -static int gitdiff_hdrend(const char *line, struct patch *patch) -{ - return -1; -} - -/* - * We're anal about diff header consistency, to make - * sure that we don't end up having strange ambiguous - * patches floating around. - * - * As a result, gitdiff_{old|new}name() will check - * their names against any previous information, just - * to make sure.. - */ -static char *gitdiff_verify_name(const char *line, int isnull, char *orig_name, const char *oldnew) -{ - if (!orig_name && !isnull) - return find_name(line, NULL, p_value, TERM_TAB); - - if (orig_name) { - int len; - const char *name; - char *another; - name = orig_name; - len = strlen(name); - if (isnull) - die("git apply: bad git-diff - expected /dev/null, got %s on line %d", name, linenr); - another = find_name(line, NULL, p_value, TERM_TAB); - if (!another || memcmp(another, name, len)) - die("git apply: bad git-diff - inconsistent %s filename on line %d", oldnew, linenr); - free(another); - return orig_name; - } - else { - /* expect "/dev/null" */ - if (memcmp("/dev/null", line, 9) || line[9] != '\n') - die("git apply: bad git-diff - expected /dev/null on line %d", linenr); - return NULL; - } -} - -static int gitdiff_oldname(const char *line, struct patch *patch) -{ - patch->old_name = gitdiff_verify_name(line, patch->is_new, patch->old_name, "old"); - return 0; -} - -static int gitdiff_newname(const char *line, struct patch *patch) -{ - patch->new_name = gitdiff_verify_name(line, patch->is_delete, patch->new_name, "new"); - return 0; -} - -static int gitdiff_oldmode(const char *line, struct patch *patch) -{ - patch->old_mode = strtoul(line, NULL, 8); - return 0; -} - -static int gitdiff_newmode(const char *line, struct patch *patch) -{ - patch->new_mode = strtoul(line, NULL, 8); - return 0; -} - -static int gitdiff_delete(const char *line, struct patch *patch) -{ - patch->is_delete = 1; - patch->old_name = patch->def_name; - return gitdiff_oldmode(line, patch); -} - -static int gitdiff_newfile(const char *line, struct patch *patch) -{ - patch->is_new = 1; - patch->new_name = patch->def_name; - return gitdiff_newmode(line, patch); -} - -static int gitdiff_copysrc(const char *line, struct patch *patch) -{ - patch->is_copy = 1; - patch->old_name = find_name(line, NULL, 0, 0); - return 0; -} - -static int gitdiff_copydst(const char *line, struct patch *patch) -{ - patch->is_copy = 1; - patch->new_name = find_name(line, NULL, 0, 0); - return 0; -} - -static int gitdiff_renamesrc(const char *line, struct patch *patch) -{ - patch->is_rename = 1; - patch->old_name = find_name(line, NULL, 0, 0); - return 0; -} - -static int gitdiff_renamedst(const char *line, struct patch *patch) -{ - patch->is_rename = 1; - patch->new_name = find_name(line, NULL, 0, 0); - return 0; -} - -static int gitdiff_similarity(const char *line, struct patch *patch) -{ - if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX) - patch->score = 0; - return 0; -} - -static int gitdiff_dissimilarity(const char *line, struct patch *patch) -{ - if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX) - patch->score = 0; - return 0; -} - -static int gitdiff_index(const char *line, struct patch *patch) -{ - /* - * index line is N hexadecimal, "..", N hexadecimal, - * and optional space with octal mode. - */ - const char *ptr, *eol; - int len; - - ptr = strchr(line, '.'); - if (!ptr || ptr[1] != '.' || 40 < ptr - line) - return 0; - len = ptr - line; - memcpy(patch->old_sha1_prefix, line, len); - patch->old_sha1_prefix[len] = 0; - - line = ptr + 2; - ptr = strchr(line, ' '); - eol = strchr(line, '\n'); - - if (!ptr || eol < ptr) - ptr = eol; - len = ptr - line; - - if (40 < len) - return 0; - memcpy(patch->new_sha1_prefix, line, len); - patch->new_sha1_prefix[len] = 0; - if (*ptr == ' ') - patch->old_mode = strtoul(ptr+1, NULL, 8); - return 0; -} - -/* - * This is normal for a diff that doesn't change anything: we'll fall through - * into the next diff. Tell the parser to break out. - */ -static int gitdiff_unrecognized(const char *line, struct patch *patch) -{ - return -1; -} - -static const char *stop_at_slash(const char *line, int llen) -{ - int i; - - for (i = 0; i < llen; i++) { - int ch = line[i]; - if (ch == '/') - return line + i; - } - return NULL; -} - -/* - * This is to extract the same name that appears on "diff --git" - * line. We do not find and return anything if it is a rename - * patch, and it is OK because we will find the name elsewhere. - * We need to reliably find name only when it is mode-change only, - * creation or deletion of an empty file. In any of these cases, - * both sides are the same name under a/ and b/ respectively. - */ -static char *git_header_name(char *line, int llen) -{ - const char *name; - const char *second = NULL; - size_t len; - - line += strlen("diff --git "); - llen -= strlen("diff --git "); - - if (*line == '"') { - const char *cp; - struct strbuf first = STRBUF_INIT; - struct strbuf sp = STRBUF_INIT; - - if (unquote_c_style(&first, line, &second)) - goto free_and_fail1; - - /* advance to the first slash */ - cp = stop_at_slash(first.buf, first.len); - /* we do not accept absolute paths */ - if (!cp || cp == first.buf) - goto free_and_fail1; - strbuf_remove(&first, 0, cp + 1 - first.buf); - - /* - * second points at one past closing dq of name. - * find the second name. - */ - while ((second < line + llen) && isspace(*second)) - second++; - - if (line + llen <= second) - goto free_and_fail1; - if (*second == '"') { - if (unquote_c_style(&sp, second, NULL)) - goto free_and_fail1; - cp = stop_at_slash(sp.buf, sp.len); - if (!cp || cp == sp.buf) - goto free_and_fail1; - /* They must match, otherwise ignore */ - if (strcmp(cp + 1, first.buf)) - goto free_and_fail1; - strbuf_release(&sp); - return strbuf_detach(&first, NULL); - } - - /* unquoted second */ - cp = stop_at_slash(second, line + llen - second); - if (!cp || cp == second) - goto free_and_fail1; - cp++; - if (line + llen - cp != first.len + 1 || - memcmp(first.buf, cp, first.len)) - goto free_and_fail1; - return strbuf_detach(&first, NULL); - - free_and_fail1: - strbuf_release(&first); - strbuf_release(&sp); - return NULL; - } - - /* unquoted first name */ - name = stop_at_slash(line, llen); - if (!name || name == line) - return NULL; - name++; - - /* - * since the first name is unquoted, a dq if exists must be - * the beginning of the second name. - */ - for (second = name; second < line + llen; second++) { - if (*second == '"') { - struct strbuf sp = STRBUF_INIT; - const char *np; - - if (unquote_c_style(&sp, second, NULL)) - goto free_and_fail2; - - np = stop_at_slash(sp.buf, sp.len); - if (!np || np == sp.buf) - goto free_and_fail2; - np++; - - len = sp.buf + sp.len - np; - if (len < second - name && - !strncmp(np, name, len) && - isspace(name[len])) { - /* Good */ - strbuf_remove(&sp, 0, np - sp.buf); - return strbuf_detach(&sp, NULL); - } - - free_and_fail2: - strbuf_release(&sp); - return NULL; - } - } - - /* - * Accept a name only if it shows up twice, exactly the same - * form. - */ - for (len = 0 ; ; len++) { - switch (name[len]) { - default: - continue; - case '\n': - return NULL; - case '\t': case ' ': - second = name+len; - for (;;) { - char c = *second++; - if (c == '\n') - return NULL; - if (c == '/') - break; - } - if (second[len] == '\n' && !memcmp(name, second, len)) { - return xmemdupz(name, len); - } - } - } -} - -/* Verify that we recognize the lines following a git header */ -static int parse_git_header(char *line, int len, unsigned int size, struct patch *patch) -{ - unsigned long offset; - - /* A git diff has explicit new/delete information, so we don't guess */ - patch->is_new = 0; - patch->is_delete = 0; - - /* - * Some things may not have the old name in the - * rest of the headers anywhere (pure mode changes, - * or removing or adding empty files), so we get - * the default name from the header. - */ - patch->def_name = git_header_name(line, len); - if (patch->def_name && root) { - char *s = xmalloc(root_len + strlen(patch->def_name) + 1); - strcpy(s, root); - strcpy(s + root_len, patch->def_name); - free(patch->def_name); - patch->def_name = s; - } - - line += len; - size -= len; - linenr++; - for (offset = len ; size > 0 ; offset += len, size -= len, line += len, linenr++) { - static const struct opentry { - const char *str; - int (*fn)(const char *, struct patch *); - } optable[] = { - { "@@ -", gitdiff_hdrend }, - { "--- ", gitdiff_oldname }, - { "+++ ", gitdiff_newname }, - { "old mode ", gitdiff_oldmode }, - { "new mode ", gitdiff_newmode }, - { "deleted file mode ", gitdiff_delete }, - { "new file mode ", gitdiff_newfile }, - { "copy from ", gitdiff_copysrc }, - { "copy to ", gitdiff_copydst }, - { "rename old ", gitdiff_renamesrc }, - { "rename new ", gitdiff_renamedst }, - { "rename from ", gitdiff_renamesrc }, - { "rename to ", gitdiff_renamedst }, - { "similarity index ", gitdiff_similarity }, - { "dissimilarity index ", gitdiff_dissimilarity }, - { "index ", gitdiff_index }, - { "", gitdiff_unrecognized }, - }; - int i; - - len = linelen(line, size); - if (!len || line[len-1] != '\n') - break; - for (i = 0; i < ARRAY_SIZE(optable); i++) { - const struct opentry *p = optable + i; - int oplen = strlen(p->str); - if (len < oplen || memcmp(p->str, line, oplen)) - continue; - if (p->fn(line + oplen, patch) < 0) - return offset; - break; - } - } - - return offset; -} - -static int parse_num(const char *line, unsigned long *p) -{ - char *ptr; - - if (!isdigit(*line)) - return 0; - *p = strtoul(line, &ptr, 10); - return ptr - line; -} - -static int parse_range(const char *line, int len, int offset, const char *expect, - unsigned long *p1, unsigned long *p2) -{ - int digits, ex; - - if (offset < 0 || offset >= len) - return -1; - line += offset; - len -= offset; - - digits = parse_num(line, p1); - if (!digits) - return -1; - - offset += digits; - line += digits; - len -= digits; - - *p2 = 1; - if (*line == ',') { - digits = parse_num(line+1, p2); - if (!digits) - return -1; - - offset += digits+1; - line += digits+1; - len -= digits+1; - } - - ex = strlen(expect); - if (ex > len) - return -1; - if (memcmp(line, expect, ex)) - return -1; - - return offset + ex; -} - -static void recount_diff(char *line, int size, struct fragment *fragment) -{ - int oldlines = 0, newlines = 0, ret = 0; - - if (size < 1) { - warning("recount: ignore empty hunk"); - return; - } - - for (;;) { - int len = linelen(line, size); - size -= len; - line += len; - - if (size < 1) - break; - - switch (*line) { - case ' ': case '\n': - newlines++; - /* fall through */ - case '-': - oldlines++; - continue; - case '+': - newlines++; - continue; - case '\\': - continue; - case '@': - ret = size < 3 || prefixcmp(line, "@@ "); - break; - case 'd': - ret = size < 5 || prefixcmp(line, "diff "); - break; - default: - ret = -1; - break; - } - if (ret) { - warning("recount: unexpected line: %.*s", - (int)linelen(line, size), line); - return; - } - break; - } - fragment->oldlines = oldlines; - fragment->newlines = newlines; -} - -/* - * Parse a unified diff fragment header of the - * form "@@ -a,b +c,d @@" - */ -static int parse_fragment_header(char *line, int len, struct fragment *fragment) -{ - int offset; - - if (!len || line[len-1] != '\n') - return -1; - - /* Figure out the number of lines in a fragment */ - offset = parse_range(line, len, 4, " +", &fragment->oldpos, &fragment->oldlines); - offset = parse_range(line, len, offset, " @@", &fragment->newpos, &fragment->newlines); - - return offset; -} - -static int find_header(char *line, unsigned long size, int *hdrsize, struct patch *patch) -{ - unsigned long offset, len; - - patch->is_toplevel_relative = 0; - patch->is_rename = patch->is_copy = 0; - patch->is_new = patch->is_delete = -1; - patch->old_mode = patch->new_mode = 0; - patch->old_name = patch->new_name = NULL; - for (offset = 0; size > 0; offset += len, size -= len, line += len, linenr++) { - unsigned long nextlen; - - len = linelen(line, size); - if (!len) - break; - - /* Testing this early allows us to take a few shortcuts.. */ - if (len < 6) - continue; - - /* - * Make sure we don't find any unconnected patch fragments. - * That's a sign that we didn't find a header, and that a - * patch has become corrupted/broken up. - */ - if (!memcmp("@@ -", line, 4)) { - struct fragment dummy; - if (parse_fragment_header(line, len, &dummy) < 0) - continue; - die("patch fragment without header at line %d: %.*s", - linenr, (int)len-1, line); - } - - if (size < len + 6) - break; - - /* - * Git patch? It might not have a real patch, just a rename - * or mode change, so we handle that specially - */ - if (!memcmp("diff --git ", line, 11)) { - int git_hdr_len = parse_git_header(line, len, size, patch); - if (git_hdr_len <= len) - continue; - if (!patch->old_name && !patch->new_name) { - if (!patch->def_name) - die("git diff header lacks filename information (line %d)", linenr); - patch->old_name = patch->new_name = patch->def_name; - } - patch->is_toplevel_relative = 1; - *hdrsize = git_hdr_len; - return offset; - } - - /* --- followed by +++ ? */ - if (memcmp("--- ", line, 4) || memcmp("+++ ", line + len, 4)) - continue; - - /* - * We only accept unified patches, so we want it to - * at least have "@@ -a,b +c,d @@\n", which is 14 chars - * minimum ("@@ -0,0 +1 @@\n" is the shortest). - */ - nextlen = linelen(line + len, size - len); - if (size < nextlen + 14 || memcmp("@@ -", line + len + nextlen, 4)) - continue; - - /* Ok, we'll consider it a patch */ - parse_traditional_patch(line, line+len, patch); - *hdrsize = len + nextlen; - linenr += 2; - return offset; - } - return -1; -} - -static void check_whitespace(const char *line, int len, unsigned ws_rule) -{ - char *err; - unsigned result = ws_check(line + 1, len - 1, ws_rule); - if (!result) - return; - - whitespace_error++; - if (squelch_whitespace_errors && - squelch_whitespace_errors < whitespace_error) - ; - else { - err = whitespace_error_string(result); - fprintf(stderr, "%s:%d: %s.\n%.*s\n", - patch_input_file, linenr, err, len - 2, line + 1); - free(err); - } -} - -/* - * Parse a unified diff. Note that this really needs to parse each - * fragment separately, since the only way to know the difference - * between a "---" that is part of a patch, and a "---" that starts - * the next patch is to look at the line counts.. - */ -static int parse_fragment(char *line, unsigned long size, - struct patch *patch, struct fragment *fragment) -{ - int added, deleted; - int len = linelen(line, size), offset; - unsigned long oldlines, newlines; - unsigned long leading, trailing; - - offset = parse_fragment_header(line, len, fragment); - if (offset < 0) - return -1; - if (offset > 0 && patch->recount) - recount_diff(line + offset, size - offset, fragment); - oldlines = fragment->oldlines; - newlines = fragment->newlines; - leading = 0; - trailing = 0; - - /* Parse the thing.. */ - line += len; - size -= len; - linenr++; - added = deleted = 0; - for (offset = len; - 0 < size; - offset += len, size -= len, line += len, linenr++) { - if (!oldlines && !newlines) - break; - len = linelen(line, size); - if (!len || line[len-1] != '\n') - return -1; - switch (*line) { - default: - return -1; - case '\n': /* newer GNU diff, an empty context line */ - case ' ': - oldlines--; - newlines--; - if (!deleted && !added) - leading++; - trailing++; - break; - case '-': - if (apply_in_reverse && - ws_error_action != nowarn_ws_error) - check_whitespace(line, len, patch->ws_rule); - deleted++; - oldlines--; - trailing = 0; - break; - case '+': - if (!apply_in_reverse && - ws_error_action != nowarn_ws_error) - check_whitespace(line, len, patch->ws_rule); - added++; - newlines--; - trailing = 0; - break; - - /* - * We allow "\ No newline at end of file". Depending - * on locale settings when the patch was produced we - * don't know what this line looks like. The only - * thing we do know is that it begins with "\ ". - * Checking for 12 is just for sanity check -- any - * l10n of "\ No newline..." is at least that long. - */ - case '\\': - if (len < 12 || memcmp(line, "\\ ", 2)) - return -1; - break; - } - } - if (oldlines || newlines) - return -1; - fragment->leading = leading; - fragment->trailing = trailing; - - /* - * If a fragment ends with an incomplete line, we failed to include - * it in the above loop because we hit oldlines == newlines == 0 - * before seeing it. - */ - if (12 < size && !memcmp(line, "\\ ", 2)) - offset += linelen(line, size); - - patch->lines_added += added; - patch->lines_deleted += deleted; - - if (0 < patch->is_new && oldlines) - return error("new file depends on old contents"); - if (0 < patch->is_delete && newlines) - return error("deleted file still has contents"); - return offset; -} - -static int parse_single_patch(char *line, unsigned long size, struct patch *patch) -{ - unsigned long offset = 0; - unsigned long oldlines = 0, newlines = 0, context = 0; - struct fragment **fragp = &patch->fragments; - - while (size > 4 && !memcmp(line, "@@ -", 4)) { - struct fragment *fragment; - int len; - - fragment = xcalloc(1, sizeof(*fragment)); - len = parse_fragment(line, size, patch, fragment); - if (len <= 0) - die("corrupt patch at line %d", linenr); - fragment->patch = line; - fragment->size = len; - oldlines += fragment->oldlines; - newlines += fragment->newlines; - context += fragment->leading + fragment->trailing; - - *fragp = fragment; - fragp = &fragment->next; - - offset += len; - line += len; - size -= len; - } - - /* - * If something was removed (i.e. we have old-lines) it cannot - * be creation, and if something was added it cannot be - * deletion. However, the reverse is not true; --unified=0 - * patches that only add are not necessarily creation even - * though they do not have any old lines, and ones that only - * delete are not necessarily deletion. - * - * Unfortunately, a real creation/deletion patch do _not_ have - * any context line by definition, so we cannot safely tell it - * apart with --unified=0 insanity. At least if the patch has - * more than one hunk it is not creation or deletion. - */ - if (patch->is_new < 0 && - (oldlines || (patch->fragments && patch->fragments->next))) - patch->is_new = 0; - if (patch->is_delete < 0 && - (newlines || (patch->fragments && patch->fragments->next))) - patch->is_delete = 0; - - if (0 < patch->is_new && oldlines) - die("new file %s depends on old contents", patch->new_name); - if (0 < patch->is_delete && newlines) - die("deleted file %s still has contents", patch->old_name); - if (!patch->is_delete && !newlines && context) - fprintf(stderr, "** warning: file %s becomes empty but " - "is not deleted\n", patch->new_name); - - return offset; -} - -static inline int metadata_changes(struct patch *patch) -{ - return patch->is_rename > 0 || - patch->is_copy > 0 || - patch->is_new > 0 || - patch->is_delete || - (patch->old_mode && patch->new_mode && - patch->old_mode != patch->new_mode); -} - -static char *inflate_it(const void *data, unsigned long size, - unsigned long inflated_size) -{ - z_stream stream; - void *out; - int st; - - memset(&stream, 0, sizeof(stream)); - - stream.next_in = (unsigned char *)data; - stream.avail_in = size; - stream.next_out = out = xmalloc(inflated_size); - stream.avail_out = inflated_size; - git_inflate_init(&stream); - st = git_inflate(&stream, Z_FINISH); - git_inflate_end(&stream); - if ((st != Z_STREAM_END) || stream.total_out != inflated_size) { - free(out); - return NULL; - } - return out; -} - -static struct fragment *parse_binary_hunk(char **buf_p, - unsigned long *sz_p, - int *status_p, - int *used_p) -{ - /* - * Expect a line that begins with binary patch method ("literal" - * or "delta"), followed by the length of data before deflating. - * a sequence of 'length-byte' followed by base-85 encoded data - * should follow, terminated by a newline. - * - * Each 5-byte sequence of base-85 encodes up to 4 bytes, - * and we would limit the patch line to 66 characters, - * so one line can fit up to 13 groups that would decode - * to 52 bytes max. The length byte 'A'-'Z' corresponds - * to 1-26 bytes, and 'a'-'z' corresponds to 27-52 bytes. - */ - int llen, used; - unsigned long size = *sz_p; - char *buffer = *buf_p; - int patch_method; - unsigned long origlen; - char *data = NULL; - int hunk_size = 0; - struct fragment *frag; - - llen = linelen(buffer, size); - used = llen; - - *status_p = 0; - - if (!prefixcmp(buffer, "delta ")) { - patch_method = BINARY_DELTA_DEFLATED; - origlen = strtoul(buffer + 6, NULL, 10); - } - else if (!prefixcmp(buffer, "literal ")) { - patch_method = BINARY_LITERAL_DEFLATED; - origlen = strtoul(buffer + 8, NULL, 10); - } - else - return NULL; - - linenr++; - buffer += llen; - while (1) { - int byte_length, max_byte_length, newsize; - llen = linelen(buffer, size); - used += llen; - linenr++; - if (llen == 1) { - /* consume the blank line */ - buffer++; - size--; - break; - } - /* - * Minimum line is "A00000\n" which is 7-byte long, - * and the line length must be multiple of 5 plus 2. - */ - if ((llen < 7) || (llen-2) % 5) - goto corrupt; - max_byte_length = (llen - 2) / 5 * 4; - byte_length = *buffer; - if ('A' <= byte_length && byte_length <= 'Z') - byte_length = byte_length - 'A' + 1; - else if ('a' <= byte_length && byte_length <= 'z') - byte_length = byte_length - 'a' + 27; - else - goto corrupt; - /* if the input length was not multiple of 4, we would - * have filler at the end but the filler should never - * exceed 3 bytes - */ - if (max_byte_length < byte_length || - byte_length <= max_byte_length - 4) - goto corrupt; - newsize = hunk_size + byte_length; - data = xrealloc(data, newsize); - if (decode_85(data + hunk_size, buffer + 1, byte_length)) - goto corrupt; - hunk_size = newsize; - buffer += llen; - size -= llen; - } - - frag = xcalloc(1, sizeof(*frag)); - frag->patch = inflate_it(data, hunk_size, origlen); - if (!frag->patch) - goto corrupt; - free(data); - frag->size = origlen; - *buf_p = buffer; - *sz_p = size; - *used_p = used; - frag->binary_patch_method = patch_method; - return frag; - - corrupt: - free(data); - *status_p = -1; - error("corrupt binary patch at line %d: %.*s", - linenr-1, llen-1, buffer); - return NULL; -} - -static int parse_binary(char *buffer, unsigned long size, struct patch *patch) -{ - /* - * We have read "GIT binary patch\n"; what follows is a line - * that says the patch method (currently, either "literal" or - * "delta") and the length of data before deflating; a - * sequence of 'length-byte' followed by base-85 encoded data - * follows. - * - * When a binary patch is reversible, there is another binary - * hunk in the same format, starting with patch method (either - * "literal" or "delta") with the length of data, and a sequence - * of length-byte + base-85 encoded data, terminated with another - * empty line. This data, when applied to the postimage, produces - * the preimage. - */ - struct fragment *forward; - struct fragment *reverse; - int status; - int used, used_1; - - forward = parse_binary_hunk(&buffer, &size, &status, &used); - if (!forward && !status) - /* there has to be one hunk (forward hunk) */ - return error("unrecognized binary patch at line %d", linenr-1); - if (status) - /* otherwise we already gave an error message */ - return status; - - reverse = parse_binary_hunk(&buffer, &size, &status, &used_1); - if (reverse) - used += used_1; - else if (status) { - /* - * Not having reverse hunk is not an error, but having - * a corrupt reverse hunk is. - */ - free((void*) forward->patch); - free(forward); - return status; - } - forward->next = reverse; - patch->fragments = forward; - patch->is_binary = 1; - return used; -} - -static int parse_chunk(char *buffer, unsigned long size, struct patch *patch) -{ - int hdrsize, patchsize; - int offset = find_header(buffer, size, &hdrsize, patch); - - if (offset < 0) - return offset; - - patch->ws_rule = whitespace_rule(patch->new_name - ? patch->new_name - : patch->old_name); - - patchsize = parse_single_patch(buffer + offset + hdrsize, - size - offset - hdrsize, patch); - - if (!patchsize) { - static const char *binhdr[] = { - "Binary files ", - "Files ", - NULL, - }; - static const char git_binary[] = "GIT binary patch\n"; - int i; - int hd = hdrsize + offset; - unsigned long llen = linelen(buffer + hd, size - hd); - - if (llen == sizeof(git_binary) - 1 && - !memcmp(git_binary, buffer + hd, llen)) { - int used; - linenr++; - used = parse_binary(buffer + hd + llen, - size - hd - llen, patch); - if (used) - patchsize = used + llen; - else - patchsize = 0; - } - else if (!memcmp(" differ\n", buffer + hd + llen - 8, 8)) { - for (i = 0; binhdr[i]; i++) { - int len = strlen(binhdr[i]); - if (len < size - hd && - !memcmp(binhdr[i], buffer + hd, len)) { - linenr++; - patch->is_binary = 1; - patchsize = llen; - break; - } - } - } - - /* Empty patch cannot be applied if it is a text patch - * without metadata change. A binary patch appears - * empty to us here. - */ - if ((apply || check) && - (!patch->is_binary && !metadata_changes(patch))) - die("patch with only garbage at line %d", linenr); - } - - return offset + hdrsize + patchsize; -} - -#define swap(a,b) myswap((a),(b),sizeof(a)) - -#define myswap(a, b, size) do { \ - unsigned char mytmp[size]; \ - memcpy(mytmp, &a, size); \ - memcpy(&a, &b, size); \ - memcpy(&b, mytmp, size); \ -} while (0) - -static void reverse_patches(struct patch *p) -{ - for (; p; p = p->next) { - struct fragment *frag = p->fragments; - - swap(p->new_name, p->old_name); - swap(p->new_mode, p->old_mode); - swap(p->is_new, p->is_delete); - swap(p->lines_added, p->lines_deleted); - swap(p->old_sha1_prefix, p->new_sha1_prefix); - - for (; frag; frag = frag->next) { - swap(frag->newpos, frag->oldpos); - swap(frag->newlines, frag->oldlines); - } - } -} - -static const char pluses[] = -"++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"; -static const char minuses[]= -"----------------------------------------------------------------------"; - -static void show_stats(struct patch *patch) -{ - struct strbuf qname = STRBUF_INIT; - char *cp = patch->new_name ? patch->new_name : patch->old_name; - int max, add, del; - - quote_c_style(cp, &qname, NULL, 0); - - /* - * "scale" the filename - */ - max = max_len; - if (max > 50) - max = 50; - - if (qname.len > max) { - cp = strchr(qname.buf + qname.len + 3 - max, '/'); - if (!cp) - cp = qname.buf + qname.len + 3 - max; - strbuf_splice(&qname, 0, cp - qname.buf, "...", 3); - } - - if (patch->is_binary) { - printf(" %-*s | Bin\n", max, qname.buf); - strbuf_release(&qname); - return; - } - - printf(" %-*s |", max, qname.buf); - strbuf_release(&qname); - - /* - * scale the add/delete - */ - max = max + max_change > 70 ? 70 - max : max_change; - add = patch->lines_added; - del = patch->lines_deleted; - - if (max_change > 0) { - int total = ((add + del) * max + max_change / 2) / max_change; - add = (add * max + max_change / 2) / max_change; - del = total - add; - } - printf("%5d %.*s%.*s\n", patch->lines_added + patch->lines_deleted, - add, pluses, del, minuses); -} - -static int read_old_data(struct stat *st, const char *path, struct strbuf *buf) -{ - switch (st->st_mode & S_IFMT) { - case S_IFLNK: - if (strbuf_readlink(buf, path, st->st_size) < 0) - return error("unable to read symlink %s", path); - return 0; - case S_IFREG: - if (strbuf_read_file(buf, path, st->st_size) != st->st_size) - return error("unable to open or read %s", path); - convert_to_git(path, buf->buf, buf->len, buf, 0); - return 0; - default: - return -1; - } -} - -/* - * Update the preimage, and the common lines in postimage, - * from buffer buf of length len. If postlen is 0 the postimage - * is updated in place, otherwise it's updated on a new buffer - * of length postlen - */ - -static void update_pre_post_images(struct image *preimage, - struct image *postimage, - char *buf, - size_t len, size_t postlen) -{ - int i, ctx; - char *new, *old, *fixed; - struct image fixed_preimage; - - /* - * Update the preimage with whitespace fixes. Note that we - * are not losing preimage->buf -- apply_one_fragment() will - * free "oldlines". - */ - prepare_image(&fixed_preimage, buf, len, 1); - assert(fixed_preimage.nr == preimage->nr); - for (i = 0; i < preimage->nr; i++) - fixed_preimage.line[i].flag = preimage->line[i].flag; - free(preimage->line_allocated); - *preimage = fixed_preimage; - - /* - * Adjust the common context lines in postimage. This can be - * done in-place when we are just doing whitespace fixing, - * which does not make the string grow, but needs a new buffer - * when ignoring whitespace causes the update, since in this case - * we could have e.g. tabs converted to multiple spaces. - * We trust the caller to tell us if the update can be done - * in place (postlen==0) or not. - */ - old = postimage->buf; - if (postlen) - new = postimage->buf = xmalloc(postlen); - else - new = old; - fixed = preimage->buf; - for (i = ctx = 0; i < postimage->nr; i++) { - size_t len = postimage->line[i].len; - if (!(postimage->line[i].flag & LINE_COMMON)) { - /* an added line -- no counterparts in preimage */ - memmove(new, old, len); - old += len; - new += len; - continue; - } - - /* a common context -- skip it in the original postimage */ - old += len; - - /* and find the corresponding one in the fixed preimage */ - while (ctx < preimage->nr && - !(preimage->line[ctx].flag & LINE_COMMON)) { - fixed += preimage->line[ctx].len; - ctx++; - } - if (preimage->nr <= ctx) - die("oops"); - - /* and copy it in, while fixing the line length */ - len = preimage->line[ctx].len; - memcpy(new, fixed, len); - new += len; - fixed += len; - postimage->line[i].len = len; - ctx++; - } - - /* Fix the length of the whole thing */ - postimage->len = new - postimage->buf; -} - -static int match_fragment(struct image *img, - struct image *preimage, - struct image *postimage, - unsigned long try, - int try_lno, - unsigned ws_rule, - int match_beginning, int match_end) -{ - int i; - char *fixed_buf, *buf, *orig, *target; - - if (preimage->nr + try_lno > img->nr) - return 0; - - if (match_beginning && try_lno) - return 0; - - if (match_end && preimage->nr + try_lno != img->nr) - return 0; - - /* Quick hash check */ - for (i = 0; i < preimage->nr; i++) - if (preimage->line[i].hash != img->line[try_lno + i].hash) - return 0; - - /* - * Do we have an exact match? If we were told to match - * at the end, size must be exactly at try+fragsize, - * otherwise try+fragsize must be still within the preimage, - * and either case, the old piece should match the preimage - * exactly. - */ - if ((match_end - ? (try + preimage->len == img->len) - : (try + preimage->len <= img->len)) && - !memcmp(img->buf + try, preimage->buf, preimage->len)) - return 1; - - /* - * No exact match. If we are ignoring whitespace, run a line-by-line - * fuzzy matching. We collect all the line length information because - * we need it to adjust whitespace if we match. - */ - if (ws_ignore_action == ignore_ws_change) { - size_t imgoff = 0; - size_t preoff = 0; - size_t postlen = postimage->len; - for (i = 0; i < preimage->nr; i++) { - size_t prelen = preimage->line[i].len; - size_t imglen = img->line[try_lno+i].len; - - if (!fuzzy_matchlines(img->buf + try + imgoff, imglen, - preimage->buf + preoff, prelen)) - return 0; - if (preimage->line[i].flag & LINE_COMMON) - postlen += imglen - prelen; - imgoff += imglen; - preoff += prelen; - } - - /* - * Ok, the preimage matches with whitespace fuzz. Update it and - * the common postimage lines to use the same whitespace as the - * target. imgoff now holds the true length of the target that - * matches the preimage, and we need to update the line lengths - * of the preimage to match the target ones. - */ - fixed_buf = xmalloc(imgoff); - memcpy(fixed_buf, img->buf + try, imgoff); - for (i = 0; i < preimage->nr; i++) - preimage->line[i].len = img->line[try_lno+i].len; - - /* - * Update the preimage buffer and the postimage context lines. - */ - update_pre_post_images(preimage, postimage, - fixed_buf, imgoff, postlen); - return 1; - } - - if (ws_error_action != correct_ws_error) - return 0; - - /* - * The hunk does not apply byte-by-byte, but the hash says - * it might with whitespace fuzz. We haven't been asked to - * ignore whitespace, we were asked to correct whitespace - * errors, so let's try matching after whitespace correction. - */ - fixed_buf = xmalloc(preimage->len + 1); - buf = fixed_buf; - orig = preimage->buf; - target = img->buf + try; - for (i = 0; i < preimage->nr; i++) { - size_t fixlen; /* length after fixing the preimage */ - size_t oldlen = preimage->line[i].len; - size_t tgtlen = img->line[try_lno + i].len; - size_t tgtfixlen; /* length after fixing the target line */ - char tgtfixbuf[1024], *tgtfix; - int match; - - /* Try fixing the line in the preimage */ - fixlen = ws_fix_copy(buf, orig, oldlen, ws_rule, NULL); - - /* Try fixing the line in the target */ - if (sizeof(tgtfixbuf) > tgtlen) - tgtfix = tgtfixbuf; - else - tgtfix = xmalloc(tgtlen); - tgtfixlen = ws_fix_copy(tgtfix, target, tgtlen, ws_rule, NULL); - - /* - * If they match, either the preimage was based on - * a version before our tree fixed whitespace breakage, - * or we are lacking a whitespace-fix patch the tree - * the preimage was based on already had (i.e. target - * has whitespace breakage, the preimage doesn't). - * In either case, we are fixing the whitespace breakages - * so we might as well take the fix together with their - * real change. - */ - match = (tgtfixlen == fixlen && !memcmp(tgtfix, buf, fixlen)); - - if (tgtfix != tgtfixbuf) - free(tgtfix); - if (!match) - goto unmatch_exit; - - orig += oldlen; - buf += fixlen; - target += tgtlen; - } - - /* - * Yes, the preimage is based on an older version that still - * has whitespace breakages unfixed, and fixing them makes the - * hunk match. Update the context lines in the postimage. - */ - update_pre_post_images(preimage, postimage, - fixed_buf, buf - fixed_buf, 0); - return 1; - - unmatch_exit: - free(fixed_buf); - return 0; -} - -static int find_pos(struct image *img, - struct image *preimage, - struct image *postimage, - int line, - unsigned ws_rule, - int match_beginning, int match_end) -{ - int i; - unsigned long backwards, forwards, try; - int backwards_lno, forwards_lno, try_lno; - - if (preimage->nr > img->nr) - return -1; - - /* - * If match_begining or match_end is specified, there is no - * point starting from a wrong line that will never match and - * wander around and wait for a match at the specified end. - */ - if (match_beginning) - line = 0; - else if (match_end) - line = img->nr - preimage->nr; - - if (line > img->nr) - line = img->nr; - - try = 0; - for (i = 0; i < line; i++) - try += img->line[i].len; - - /* - * There's probably some smart way to do this, but I'll leave - * that to the smart and beautiful people. I'm simple and stupid. - */ - backwards = try; - backwards_lno = line; - forwards = try; - forwards_lno = line; - try_lno = line; - - for (i = 0; ; i++) { - if (match_fragment(img, preimage, postimage, - try, try_lno, ws_rule, - match_beginning, match_end)) - return try_lno; - - again: - if (backwards_lno == 0 && forwards_lno == img->nr) - break; - - if (i & 1) { - if (backwards_lno == 0) { - i++; - goto again; - } - backwards_lno--; - backwards -= img->line[backwards_lno].len; - try = backwards; - try_lno = backwards_lno; - } else { - if (forwards_lno == img->nr) { - i++; - goto again; - } - forwards += img->line[forwards_lno].len; - forwards_lno++; - try = forwards; - try_lno = forwards_lno; - } - - } - return -1; -} - -static void remove_first_line(struct image *img) -{ - img->buf += img->line[0].len; - img->len -= img->line[0].len; - img->line++; - img->nr--; -} - -static void remove_last_line(struct image *img) -{ - img->len -= img->line[--img->nr].len; -} - -static void update_image(struct image *img, - int applied_pos, - struct image *preimage, - struct image *postimage) -{ - /* - * remove the copy of preimage at offset in img - * and replace it with postimage - */ - int i, nr; - size_t remove_count, insert_count, applied_at = 0; - char *result; - - for (i = 0; i < applied_pos; i++) - applied_at += img->line[i].len; - - remove_count = 0; - for (i = 0; i < preimage->nr; i++) - remove_count += img->line[applied_pos + i].len; - insert_count = postimage->len; - - /* Adjust the contents */ - result = xmalloc(img->len + insert_count - remove_count + 1); - memcpy(result, img->buf, applied_at); - memcpy(result + applied_at, postimage->buf, postimage->len); - memcpy(result + applied_at + postimage->len, - img->buf + (applied_at + remove_count), - img->len - (applied_at + remove_count)); - free(img->buf); - img->buf = result; - img->len += insert_count - remove_count; - result[img->len] = '\0'; - - /* Adjust the line table */ - nr = img->nr + postimage->nr - preimage->nr; - if (preimage->nr < postimage->nr) { - /* - * NOTE: this knows that we never call remove_first_line() - * on anything other than pre/post image. - */ - img->line = xrealloc(img->line, nr * sizeof(*img->line)); - img->line_allocated = img->line; - } - if (preimage->nr != postimage->nr) - memmove(img->line + applied_pos + postimage->nr, - img->line + applied_pos + preimage->nr, - (img->nr - (applied_pos + preimage->nr)) * - sizeof(*img->line)); - memcpy(img->line + applied_pos, - postimage->line, - postimage->nr * sizeof(*img->line)); - img->nr = nr; -} - -static int apply_one_fragment(struct image *img, struct fragment *frag, - int inaccurate_eof, unsigned ws_rule) -{ - int match_beginning, match_end; - const char *patch = frag->patch; - int size = frag->size; - char *old, *new, *oldlines, *newlines; - int new_blank_lines_at_end = 0; - unsigned long leading, trailing; - int pos, applied_pos; - struct image preimage; - struct image postimage; - - memset(&preimage, 0, sizeof(preimage)); - memset(&postimage, 0, sizeof(postimage)); - oldlines = xmalloc(size); - newlines = xmalloc(size); - - old = oldlines; - new = newlines; - while (size > 0) { - char first; - int len = linelen(patch, size); - int plen, added; - int added_blank_line = 0; - - if (!len) - break; - - /* - * "plen" is how much of the line we should use for - * the actual patch data. Normally we just remove the - * first character on the line, but if the line is - * followed by "\ No newline", then we also remove the - * last one (which is the newline, of course). - */ - plen = len - 1; - if (len < size && patch[len] == '\\') - plen--; - first = *patch; - if (apply_in_reverse) { - if (first == '-') - first = '+'; - else if (first == '+') - first = '-'; - } - - switch (first) { - case '\n': - /* Newer GNU diff, empty context line */ - if (plen < 0) - /* ... followed by '\No newline'; nothing */ - break; - *old++ = '\n'; - *new++ = '\n'; - add_line_info(&preimage, "\n", 1, LINE_COMMON); - add_line_info(&postimage, "\n", 1, LINE_COMMON); - break; - case ' ': - case '-': - memcpy(old, patch + 1, plen); - add_line_info(&preimage, old, plen, - (first == ' ' ? LINE_COMMON : 0)); - old += plen; - if (first == '-') - break; - /* Fall-through for ' ' */ - case '+': - /* --no-add does not add new lines */ - if (first == '+' && no_add) - break; - - if (first != '+' || - !whitespace_error || - ws_error_action != correct_ws_error) { - memcpy(new, patch + 1, plen); - added = plen; - } - else { - added = ws_fix_copy(new, patch + 1, plen, ws_rule, &applied_after_fixing_ws); - } - add_line_info(&postimage, new, added, - (first == '+' ? 0 : LINE_COMMON)); - new += added; - if (first == '+' && - added == 1 && new[-1] == '\n') - added_blank_line = 1; - break; - case '@': case '\\': - /* Ignore it, we already handled it */ - break; - default: - if (apply_verbosely) - error("invalid start of line: '%c'", first); - return -1; - } - if (added_blank_line) - new_blank_lines_at_end++; - else - new_blank_lines_at_end = 0; - patch += len; - size -= len; - } - if (inaccurate_eof && - old > oldlines && old[-1] == '\n' && - new > newlines && new[-1] == '\n') { - old--; - new--; - } - - leading = frag->leading; - trailing = frag->trailing; - - /* - * A hunk to change lines at the beginning would begin with - * @@ -1,L +N,M @@ - * but we need to be careful. -U0 that inserts before the second - * line also has this pattern. - * - * And a hunk to add to an empty file would begin with - * @@ -0,0 +N,M @@ - * - * In other words, a hunk that is (frag->oldpos <= 1) with or - * without leading context must match at the beginning. - */ - match_beginning = (!frag->oldpos || - (frag->oldpos == 1 && !unidiff_zero)); - - /* - * A hunk without trailing lines must match at the end. - * However, we simply cannot tell if a hunk must match end - * from the lack of trailing lines if the patch was generated - * with unidiff without any context. - */ - match_end = !unidiff_zero && !trailing; - - pos = frag->newpos ? (frag->newpos - 1) : 0; - preimage.buf = oldlines; - preimage.len = old - oldlines; - postimage.buf = newlines; - postimage.len = new - newlines; - preimage.line = preimage.line_allocated; - postimage.line = postimage.line_allocated; - - for (;;) { - - applied_pos = find_pos(img, &preimage, &postimage, pos, - ws_rule, match_beginning, match_end); - - if (applied_pos >= 0) - break; - - /* Am I at my context limits? */ - if ((leading <= p_context) && (trailing <= p_context)) - break; - if (match_beginning || match_end) { - match_beginning = match_end = 0; - continue; - } - - /* - * Reduce the number of context lines; reduce both - * leading and trailing if they are equal otherwise - * just reduce the larger context. - */ - if (leading >= trailing) { - remove_first_line(&preimage); - remove_first_line(&postimage); - pos--; - leading--; - } - if (trailing > leading) { - remove_last_line(&preimage); - remove_last_line(&postimage); - trailing--; - } - } - - if (applied_pos >= 0) { - if (ws_error_action == correct_ws_error && - new_blank_lines_at_end && - postimage.nr + applied_pos == img->nr) { - /* - * If the patch application adds blank lines - * at the end, and if the patch applies at the - * end of the image, remove those added blank - * lines. - */ - while (new_blank_lines_at_end--) - remove_last_line(&postimage); - } - - /* - * Warn if it was necessary to reduce the number - * of context lines. - */ - if ((leading != frag->leading) || - (trailing != frag->trailing)) - fprintf(stderr, "Context reduced to (%ld/%ld)" - " to apply fragment at %d\n", - leading, trailing, applied_pos+1); - update_image(img, applied_pos, &preimage, &postimage); - } else { - if (apply_verbosely) - error("while searching for:\n%.*s", - (int)(old - oldlines), oldlines); - } - - free(oldlines); - free(newlines); - free(preimage.line_allocated); - free(postimage.line_allocated); - - return (applied_pos < 0); -} - -static int apply_binary_fragment(struct image *img, struct patch *patch) -{ - struct fragment *fragment = patch->fragments; - unsigned long len; - void *dst; - - /* Binary patch is irreversible without the optional second hunk */ - if (apply_in_reverse) { - if (!fragment->next) - return error("cannot reverse-apply a binary patch " - "without the reverse hunk to '%s'", - patch->new_name - ? patch->new_name : patch->old_name); - fragment = fragment->next; - } - switch (fragment->binary_patch_method) { - case BINARY_DELTA_DEFLATED: - dst = patch_delta(img->buf, img->len, fragment->patch, - fragment->size, &len); - if (!dst) - return -1; - clear_image(img); - img->buf = dst; - img->len = len; - return 0; - case BINARY_LITERAL_DEFLATED: - clear_image(img); - img->len = fragment->size; - img->buf = xmalloc(img->len+1); - memcpy(img->buf, fragment->patch, img->len); - img->buf[img->len] = '\0'; - return 0; - } - return -1; -} - -static int apply_binary(struct image *img, struct patch *patch) -{ - const char *name = patch->old_name ? patch->old_name : patch->new_name; - unsigned char sha1[20]; - - /* - * For safety, we require patch index line to contain - * full 40-byte textual SHA1 for old and new, at least for now. - */ - if (strlen(patch->old_sha1_prefix) != 40 || - strlen(patch->new_sha1_prefix) != 40 || - get_sha1_hex(patch->old_sha1_prefix, sha1) || - get_sha1_hex(patch->new_sha1_prefix, sha1)) - return error("cannot apply binary patch to '%s' " - "without full index line", name); - - if (patch->old_name) { - /* - * See if the old one matches what the patch - * applies to. - */ - hash_sha1_file(img->buf, img->len, blob_type, sha1); - if (strcmp(sha1_to_hex(sha1), patch->old_sha1_prefix)) - return error("the patch applies to '%s' (%s), " - "which does not match the " - "current contents.", - name, sha1_to_hex(sha1)); - } - else { - /* Otherwise, the old one must be empty. */ - if (img->len) - return error("the patch applies to an empty " - "'%s' but it is not empty", name); - } - - get_sha1_hex(patch->new_sha1_prefix, sha1); - if (is_null_sha1(sha1)) { - clear_image(img); - return 0; /* deletion patch */ - } - - if (has_sha1_file(sha1)) { - /* We already have the postimage */ - enum object_type type; - unsigned long size; - char *result; - - result = read_sha1_file(sha1, &type, &size); - if (!result) - return error("the necessary postimage %s for " - "'%s' cannot be read", - patch->new_sha1_prefix, name); - clear_image(img); - img->buf = result; - img->len = size; - } else { - /* - * We have verified buf matches the preimage; - * apply the patch data to it, which is stored - * in the patch->fragments->{patch,size}. - */ - if (apply_binary_fragment(img, patch)) - return error("binary patch does not apply to '%s'", - name); - - /* verify that the result matches */ - hash_sha1_file(img->buf, img->len, blob_type, sha1); - if (strcmp(sha1_to_hex(sha1), patch->new_sha1_prefix)) - return error("binary patch to '%s' creates incorrect result (expecting %s, got %s)", - name, patch->new_sha1_prefix, sha1_to_hex(sha1)); - } - - return 0; -} - -static int apply_fragments(struct image *img, struct patch *patch) -{ - struct fragment *frag = patch->fragments; - const char *name = patch->old_name ? patch->old_name : patch->new_name; - unsigned ws_rule = patch->ws_rule; - unsigned inaccurate_eof = patch->inaccurate_eof; - - if (patch->is_binary) - return apply_binary(img, patch); - - while (frag) { - if (apply_one_fragment(img, frag, inaccurate_eof, ws_rule)) { - error("patch failed: %s:%ld", name, frag->oldpos); - if (!apply_with_reject) - return -1; - frag->rejected = 1; - } - frag = frag->next; - } - return 0; -} - -static int read_file_or_gitlink(struct cache_entry *ce, struct strbuf *buf) -{ - if (!ce) - return 0; - - if (S_ISGITLINK(ce->ce_mode)) { - strbuf_grow(buf, 100); - strbuf_addf(buf, "Subproject commit %s\n", sha1_to_hex(ce->sha1)); - } else { - enum object_type type; - unsigned long sz; - char *result; - - result = read_sha1_file(ce->sha1, &type, &sz); - if (!result) - return -1; - /* XXX read_sha1_file NUL-terminates */ - strbuf_attach(buf, result, sz, sz + 1); - } - return 0; -} - -static struct patch *in_fn_table(const char *name) -{ - struct string_list_item *item; - - if (name == NULL) - return NULL; - - item = string_list_lookup(name, &fn_table); - if (item != NULL) - return (struct patch *)item->util; - - return NULL; -} - -/* - * item->util in the filename table records the status of the path. - * Usually it points at a patch (whose result records the contents - * of it after applying it), but it could be PATH_WAS_DELETED for a - * path that a previously applied patch has already removed. - */ - #define PATH_TO_BE_DELETED ((struct patch *) -2) -#define PATH_WAS_DELETED ((struct patch *) -1) - -static int to_be_deleted(struct patch *patch) -{ - return patch == PATH_TO_BE_DELETED; -} - -static int was_deleted(struct patch *patch) -{ - return patch == PATH_WAS_DELETED; -} - -static void add_to_fn_table(struct patch *patch) -{ - struct string_list_item *item; - - /* - * Always add new_name unless patch is a deletion - * This should cover the cases for normal diffs, - * file creations and copies - */ - if (patch->new_name != NULL) { - item = string_list_insert(patch->new_name, &fn_table); - item->util = patch; - } - - /* - * store a failure on rename/deletion cases because - * later chunks shouldn't patch old names - */ - if ((patch->new_name == NULL) || (patch->is_rename)) { - item = string_list_insert(patch->old_name, &fn_table); - item->util = PATH_WAS_DELETED; - } -} - -static void prepare_fn_table(struct patch *patch) -{ - /* - * store information about incoming file deletion - */ - while (patch) { - if ((patch->new_name == NULL) || (patch->is_rename)) { - struct string_list_item *item; - item = string_list_insert(patch->old_name, &fn_table); - item->util = PATH_TO_BE_DELETED; - } - patch = patch->next; - } -} - -static int apply_data(struct patch *patch, struct stat *st, struct cache_entry *ce) -{ - struct strbuf buf = STRBUF_INIT; - struct image image; - size_t len; - char *img; - struct patch *tpatch; - - if (!(patch->is_copy || patch->is_rename) && - (tpatch = in_fn_table(patch->old_name)) != NULL && !to_be_deleted(tpatch)) { - if (was_deleted(tpatch)) { - return error("patch %s has been renamed/deleted", - patch->old_name); - } - /* We have a patched copy in memory use that */ - strbuf_add(&buf, tpatch->result, tpatch->resultsize); - } else if (cached) { - if (read_file_or_gitlink(ce, &buf)) - return error("read of %s failed", patch->old_name); - } else if (patch->old_name) { - if (S_ISGITLINK(patch->old_mode)) { - if (ce) { - read_file_or_gitlink(ce, &buf); - } else { - /* - * There is no way to apply subproject - * patch without looking at the index. - */ - patch->fragments = NULL; - } - } else { - if (read_old_data(st, patch->old_name, &buf)) - return error("read of %s failed", patch->old_name); - } - } - - img = strbuf_detach(&buf, &len); - prepare_image(&image, img, len, !patch->is_binary); - - if (apply_fragments(&image, patch) < 0) - return -1; /* note with --reject this succeeds. */ - patch->result = image.buf; - patch->resultsize = image.len; - add_to_fn_table(patch); - free(image.line_allocated); - - if (0 < patch->is_delete && patch->resultsize) - return error("removal patch leaves file contents"); - - return 0; -} - -static int check_to_create_blob(const char *new_name, int ok_if_exists) -{ - struct stat nst; - if (!lstat(new_name, &nst)) { - if (S_ISDIR(nst.st_mode) || ok_if_exists) - return 0; - /* - * A leading component of new_name might be a symlink - * that is going to be removed with this patch, but - * still pointing at somewhere that has the path. - * In such a case, path "new_name" does not exist as - * far as git is concerned. - */ - if (has_symlink_leading_path(new_name, strlen(new_name))) - return 0; - - return error("%s: already exists in working directory", new_name); - } - else if ((errno != ENOENT) && (errno != ENOTDIR)) - return error("%s: %s", new_name, strerror(errno)); - return 0; -} - -static int verify_index_match(struct cache_entry *ce, struct stat *st) -{ - if (S_ISGITLINK(ce->ce_mode)) { - if (!S_ISDIR(st->st_mode)) - return -1; - return 0; - } - return ce_match_stat(ce, st, CE_MATCH_IGNORE_VALID); -} - -static int check_preimage(struct patch *patch, struct cache_entry **ce, struct stat *st) -{ - const char *old_name = patch->old_name; - struct patch *tpatch = NULL; - int stat_ret = 0; - unsigned st_mode = 0; - - /* - * Make sure that we do not have local modifications from the - * index when we are looking at the index. Also make sure - * we have the preimage file to be patched in the work tree, - * unless --cached, which tells git to apply only in the index. - */ - if (!old_name) - return 0; - - assert(patch->is_new <= 0); - - if (!(patch->is_copy || patch->is_rename) && - (tpatch = in_fn_table(old_name)) != NULL && !to_be_deleted(tpatch)) { - if (was_deleted(tpatch)) - return error("%s: has been deleted/renamed", old_name); - st_mode = tpatch->new_mode; - } else if (!cached) { - stat_ret = lstat(old_name, st); - if (stat_ret && errno != ENOENT) - return error("%s: %s", old_name, strerror(errno)); - } - - if (to_be_deleted(tpatch)) - tpatch = NULL; - - if (check_index && !tpatch) { - int pos = cache_name_pos(old_name, strlen(old_name)); - if (pos < 0) { - if (patch->is_new < 0) - goto is_new; - return error("%s: does not exist in index", old_name); - } - *ce = active_cache[pos]; - if (stat_ret < 0) { - struct checkout costate; - /* checkout */ - costate.base_dir = ""; - costate.base_dir_len = 0; - costate.force = 0; - costate.quiet = 0; - costate.not_new = 0; - costate.refresh_cache = 1; - if (checkout_entry(*ce, &costate, NULL) || - lstat(old_name, st)) - return -1; - } - if (!cached && verify_index_match(*ce, st)) - return error("%s: does not match index", old_name); - if (cached) - st_mode = (*ce)->ce_mode; - } else if (stat_ret < 0) { - if (patch->is_new < 0) - goto is_new; - return error("%s: %s", old_name, strerror(errno)); - } - - if (!cached && !tpatch) - st_mode = ce_mode_from_stat(*ce, st->st_mode); - - if (patch->is_new < 0) - patch->is_new = 0; - if (!patch->old_mode) - patch->old_mode = st_mode; - if ((st_mode ^ patch->old_mode) & S_IFMT) - return error("%s: wrong type", old_name); - if (st_mode != patch->old_mode) - warning("%s has type %o, expected %o", - old_name, st_mode, patch->old_mode); - if (!patch->new_mode && !patch->is_delete) - patch->new_mode = st_mode; - return 0; - - is_new: - patch->is_new = 1; - patch->is_delete = 0; - patch->old_name = NULL; - return 0; -} - -static int check_patch(struct patch *patch) -{ - struct stat st; - const char *old_name = patch->old_name; - const char *new_name = patch->new_name; - const char *name = old_name ? old_name : new_name; - struct cache_entry *ce = NULL; - struct patch *tpatch; - int ok_if_exists; - int status; - - patch->rejected = 1; /* we will drop this after we succeed */ - - status = check_preimage(patch, &ce, &st); - if (status) - return status; - old_name = patch->old_name; - - if ((tpatch = in_fn_table(new_name)) && - (was_deleted(tpatch) || to_be_deleted(tpatch))) - /* - * A type-change diff is always split into a patch to - * delete old, immediately followed by a patch to - * create new (see diff.c::run_diff()); in such a case - * it is Ok that the entry to be deleted by the - * previous patch is still in the working tree and in - * the index. - */ - ok_if_exists = 1; - else - ok_if_exists = 0; - - if (new_name && - ((0 < patch->is_new) | (0 < patch->is_rename) | patch->is_copy)) { - if (check_index && - cache_name_pos(new_name, strlen(new_name)) >= 0 && - !ok_if_exists) - return error("%s: already exists in index", new_name); - if (!cached) { - int err = check_to_create_blob(new_name, ok_if_exists); - if (err) - return err; - } - if (!patch->new_mode) { - if (0 < patch->is_new) - patch->new_mode = S_IFREG | 0644; - else - patch->new_mode = patch->old_mode; - } - } - - if (new_name && old_name) { - int same = !strcmp(old_name, new_name); - if (!patch->new_mode) - patch->new_mode = patch->old_mode; - if ((patch->old_mode ^ patch->new_mode) & S_IFMT) - return error("new mode (%o) of %s does not match old mode (%o)%s%s", - patch->new_mode, new_name, patch->old_mode, - same ? "" : " of ", same ? "" : old_name); - } - - if (apply_data(patch, &st, ce) < 0) - return error("%s: patch does not apply", name); - patch->rejected = 0; - return 0; -} - -static int check_patch_list(struct patch *patch) -{ - int err = 0; - - prepare_fn_table(patch); - while (patch) { - if (apply_verbosely) - say_patch_name(stderr, - "Checking patch ", patch, "...\n"); - err |= check_patch(patch); - patch = patch->next; - } - return err; -} - -/* This function tries to read the sha1 from the current index */ -static int get_current_sha1(const char *path, unsigned char *sha1) -{ - int pos; - - if (read_cache() < 0) - return -1; - pos = cache_name_pos(path, strlen(path)); - if (pos < 0) - return -1; - hashcpy(sha1, active_cache[pos]->sha1); - return 0; -} - -/* Build an index that contains the just the files needed for a 3way merge */ -static void build_fake_ancestor(struct patch *list, const char *filename) -{ - struct patch *patch; - struct index_state result = { NULL }; - int fd; - - /* Once we start supporting the reverse patch, it may be - * worth showing the new sha1 prefix, but until then... - */ - for (patch = list; patch; patch = patch->next) { - const unsigned char *sha1_ptr; - unsigned char sha1[20]; - struct cache_entry *ce; - const char *name; - - name = patch->old_name ? patch->old_name : patch->new_name; - if (0 < patch->is_new) - continue; - else if (get_sha1(patch->old_sha1_prefix, sha1)) - /* git diff has no index line for mode/type changes */ - if (!patch->lines_added && !patch->lines_deleted) { - if (get_current_sha1(patch->new_name, sha1) || - get_current_sha1(patch->old_name, sha1)) - die("mode change for %s, which is not " - "in current HEAD", name); - sha1_ptr = sha1; - } else - die("sha1 information is lacking or useless " - "(%s).", name); - else - sha1_ptr = sha1; - - ce = make_cache_entry(patch->old_mode, sha1_ptr, name, 0, 0); - if (!ce) - die("make_cache_entry failed for path '%s'", name); - if (add_index_entry(&result, ce, ADD_CACHE_OK_TO_ADD)) - die ("Could not add %s to temporary index", name); - } - - fd = open(filename, O_WRONLY | O_CREAT, 0666); - if (fd < 0 || write_index(&result, fd) || close(fd)) - die ("Could not write temporary index to %s", filename); - - discard_index(&result); -} - -static void stat_patch_list(struct patch *patch) -{ - int files, adds, dels; - - for (files = adds = dels = 0 ; patch ; patch = patch->next) { - files++; - adds += patch->lines_added; - dels += patch->lines_deleted; - show_stats(patch); - } - - printf(" %d files changed, %d insertions(+), %d deletions(-)\n", files, adds, dels); -} - -static void numstat_patch_list(struct patch *patch) -{ - for ( ; patch; patch = patch->next) { - const char *name; - name = patch->new_name ? patch->new_name : patch->old_name; - if (patch->is_binary) - printf("-\t-\t"); - else - printf("%d\t%d\t", patch->lines_added, patch->lines_deleted); - write_name_quoted(name, stdout, line_termination); - } -} - -static void show_file_mode_name(const char *newdelete, unsigned int mode, const char *name) -{ - if (mode) - printf(" %s mode %06o %s\n", newdelete, mode, name); - else - printf(" %s %s\n", newdelete, name); -} - -static void show_mode_change(struct patch *p, int show_name) -{ - if (p->old_mode && p->new_mode && p->old_mode != p->new_mode) { - if (show_name) - printf(" mode change %06o => %06o %s\n", - p->old_mode, p->new_mode, p->new_name); - else - printf(" mode change %06o => %06o\n", - p->old_mode, p->new_mode); - } -} - -static void show_rename_copy(struct patch *p) -{ - const char *renamecopy = p->is_rename ? "rename" : "copy"; - const char *old, *new; - - /* Find common prefix */ - old = p->old_name; - new = p->new_name; - while (1) { - const char *slash_old, *slash_new; - slash_old = strchr(old, '/'); - slash_new = strchr(new, '/'); - if (!slash_old || - !slash_new || - slash_old - old != slash_new - new || - memcmp(old, new, slash_new - new)) - break; - old = slash_old + 1; - new = slash_new + 1; - } - /* p->old_name thru old is the common prefix, and old and new - * through the end of names are renames - */ - if (old != p->old_name) - printf(" %s %.*s{%s => %s} (%d%%)\n", renamecopy, - (int)(old - p->old_name), p->old_name, - old, new, p->score); - else - printf(" %s %s => %s (%d%%)\n", renamecopy, - p->old_name, p->new_name, p->score); - show_mode_change(p, 0); -} - -static void summary_patch_list(struct patch *patch) -{ - struct patch *p; - - for (p = patch; p; p = p->next) { - if (p->is_new) - show_file_mode_name("create", p->new_mode, p->new_name); - else if (p->is_delete) - show_file_mode_name("delete", p->old_mode, p->old_name); - else { - if (p->is_rename || p->is_copy) - show_rename_copy(p); - else { - if (p->score) { - printf(" rewrite %s (%d%%)\n", - p->new_name, p->score); - show_mode_change(p, 0); - } - else - show_mode_change(p, 1); - } - } - } -} - -static void patch_stats(struct patch *patch) -{ - int lines = patch->lines_added + patch->lines_deleted; - - if (lines > max_change) - max_change = lines; - if (patch->old_name) { - int len = quote_c_style(patch->old_name, NULL, NULL, 0); - if (!len) - len = strlen(patch->old_name); - if (len > max_len) - max_len = len; - } - if (patch->new_name) { - int len = quote_c_style(patch->new_name, NULL, NULL, 0); - if (!len) - len = strlen(patch->new_name); - if (len > max_len) - max_len = len; - } -} - -static void remove_file(struct patch *patch, int rmdir_empty) -{ - if (update_index) { - if (remove_file_from_cache(patch->old_name) < 0) - die("unable to remove %s from index", patch->old_name); - } - if (!cached) { - if (S_ISGITLINK(patch->old_mode)) { - if (rmdir(patch->old_name)) - warning("unable to remove submodule %s", - patch->old_name); - } else if (!unlink_or_warn(patch->old_name) && rmdir_empty) { - remove_path(patch->old_name); - } - } -} - -static void add_index_file(const char *path, unsigned mode, void *buf, unsigned long size) -{ - struct stat st; - struct cache_entry *ce; - int namelen = strlen(path); - unsigned ce_size = cache_entry_size(namelen); - - if (!update_index) - return; - - ce = xcalloc(1, ce_size); - memcpy(ce->name, path, namelen); - ce->ce_mode = create_ce_mode(mode); - ce->ce_flags = namelen; - if (S_ISGITLINK(mode)) { - const char *s = buf; - - if (get_sha1_hex(s + strlen("Subproject commit "), ce->sha1)) - die("corrupt patch for subproject %s", path); - } else { - if (!cached) { - if (lstat(path, &st) < 0) - die_errno("unable to stat newly created file '%s'", - path); - fill_stat_cache_info(ce, &st); - } - if (write_sha1_file(buf, size, blob_type, ce->sha1) < 0) - die("unable to create backing store for newly created file %s", path); - } - if (add_cache_entry(ce, ADD_CACHE_OK_TO_ADD) < 0) - die("unable to add cache entry for %s", path); -} - -static int try_create_file(const char *path, unsigned int mode, const char *buf, unsigned long size) -{ - int fd; - struct strbuf nbuf = STRBUF_INIT; - - if (S_ISGITLINK(mode)) { - struct stat st; - if (!lstat(path, &st) && S_ISDIR(st.st_mode)) - return 0; - return mkdir(path, 0777); - } - - if (has_symlinks && S_ISLNK(mode)) - /* Although buf:size is counted string, it also is NUL - * terminated. - */ - return symlink(buf, path); - - fd = open(path, O_CREAT | O_EXCL | O_WRONLY, (mode & 0100) ? 0777 : 0666); - if (fd < 0) - return -1; - - if (convert_to_working_tree(path, buf, size, &nbuf)) { - size = nbuf.len; - buf = nbuf.buf; - } - write_or_die(fd, buf, size); - strbuf_release(&nbuf); - - if (close(fd) < 0) - die_errno("closing file '%s'", path); - return 0; -} - -/* - * We optimistically assume that the directories exist, - * which is true 99% of the time anyway. If they don't, - * we create them and try again. - */ -static void create_one_file(char *path, unsigned mode, const char *buf, unsigned long size) -{ - if (cached) - return; - if (!try_create_file(path, mode, buf, size)) - return; - - if (errno == ENOENT) { - if (safe_create_leading_directories(path)) - return; - if (!try_create_file(path, mode, buf, size)) - return; - } - - if (errno == EEXIST || errno == EACCES) { - /* We may be trying to create a file where a directory - * used to be. - */ - struct stat st; - if (!lstat(path, &st) && (!S_ISDIR(st.st_mode) || !rmdir(path))) - errno = EEXIST; - } - - if (errno == EEXIST) { - unsigned int nr = getpid(); - - for (;;) { - char newpath[PATH_MAX]; - mksnpath(newpath, sizeof(newpath), "%s~%u", path, nr); - if (!try_create_file(newpath, mode, buf, size)) { - if (!rename(newpath, path)) - return; - unlink_or_warn(newpath); - break; - } - if (errno != EEXIST) - break; - ++nr; - } - } - die_errno("unable to write file '%s' mode %o", path, mode); -} - -static void create_file(struct patch *patch) -{ - char *path = patch->new_name; - unsigned mode = patch->new_mode; - unsigned long size = patch->resultsize; - char *buf = patch->result; - - if (!mode) - mode = S_IFREG | 0644; - create_one_file(path, mode, buf, size); - add_index_file(path, mode, buf, size); -} - -/* phase zero is to remove, phase one is to create */ -static void write_out_one_result(struct patch *patch, int phase) -{ - if (patch->is_delete > 0) { - if (phase == 0) - remove_file(patch, 1); - return; - } - if (patch->is_new > 0 || patch->is_copy) { - if (phase == 1) - create_file(patch); - return; - } - /* - * Rename or modification boils down to the same - * thing: remove the old, write the new - */ - if (phase == 0) - remove_file(patch, patch->is_rename); - if (phase == 1) - create_file(patch); -} - -static int write_out_one_reject(struct patch *patch) -{ - FILE *rej; - char namebuf[PATH_MAX]; - struct fragment *frag; - int cnt = 0; - - for (cnt = 0, frag = patch->fragments; frag; frag = frag->next) { - if (!frag->rejected) - continue; - cnt++; - } - - if (!cnt) { - if (apply_verbosely) - say_patch_name(stderr, - "Applied patch ", patch, " cleanly.\n"); - return 0; - } - - /* This should not happen, because a removal patch that leaves - * contents are marked "rejected" at the patch level. - */ - if (!patch->new_name) - die("internal error"); - - /* Say this even without --verbose */ - say_patch_name(stderr, "Applying patch ", patch, " with"); - fprintf(stderr, " %d rejects...\n", cnt); - - cnt = strlen(patch->new_name); - if (ARRAY_SIZE(namebuf) <= cnt + 5) { - cnt = ARRAY_SIZE(namebuf) - 5; - warning("truncating .rej filename to %.*s.rej", - cnt - 1, patch->new_name); - } - memcpy(namebuf, patch->new_name, cnt); - memcpy(namebuf + cnt, ".rej", 5); - - rej = fopen(namebuf, "w"); - if (!rej) - return error("cannot open %s: %s", namebuf, strerror(errno)); - - /* Normal git tools never deal with .rej, so do not pretend - * this is a git patch by saying --git nor give extended - * headers. While at it, maybe please "kompare" that wants - * the trailing TAB and some garbage at the end of line ;-). - */ - fprintf(rej, "diff a/%s b/%s\t(rejected hunks)\n", - patch->new_name, patch->new_name); - for (cnt = 1, frag = patch->fragments; - frag; - cnt++, frag = frag->next) { - if (!frag->rejected) { - fprintf(stderr, "Hunk #%d applied cleanly.\n", cnt); - continue; - } - fprintf(stderr, "Rejected hunk #%d.\n", cnt); - fprintf(rej, "%.*s", frag->size, frag->patch); - if (frag->patch[frag->size-1] != '\n') - fputc('\n', rej); - } - fclose(rej); - return -1; -} - -static int write_out_results(struct patch *list, int skipped_patch) -{ - int phase; - int errs = 0; - struct patch *l; - - if (!list && !skipped_patch) - return error("No changes"); - - for (phase = 0; phase < 2; phase++) { - l = list; - while (l) { - if (l->rejected) - errs = 1; - else { - write_out_one_result(l, phase); - if (phase == 1 && write_out_one_reject(l)) - errs = 1; - } - l = l->next; - } - } - return errs; -} - -static struct lock_file lock_file; - -static struct string_list limit_by_name; -static int has_include; -static void add_name_limit(const char *name, int exclude) -{ - struct string_list_item *it; - - it = string_list_append(name, &limit_by_name); - it->util = exclude ? NULL : (void *) 1; -} - -static int use_patch(struct patch *p) -{ - const char *pathname = p->new_name ? p->new_name : p->old_name; - int i; - - /* Paths outside are not touched regardless of "--include" */ - if (0 < prefix_length) { - int pathlen = strlen(pathname); - if (pathlen <= prefix_length || - memcmp(prefix, pathname, prefix_length)) - return 0; - } - - /* See if it matches any of exclude/include rule */ - for (i = 0; i < limit_by_name.nr; i++) { - struct string_list_item *it = &limit_by_name.items[i]; - if (!fnmatch(it->string, pathname, 0)) - return (it->util != NULL); - } - - /* - * If we had any include, a path that does not match any rule is - * not used. Otherwise, we saw bunch of exclude rules (or none) - * and such a path is used. - */ - return !has_include; -} - - -static void prefix_one(char **name) -{ - char *old_name = *name; - if (!old_name) - return; - *name = xstrdup(prefix_filename(prefix, prefix_length, *name)); - free(old_name); -} - -static void prefix_patches(struct patch *p) -{ - if (!prefix || p->is_toplevel_relative) - return; - for ( ; p; p = p->next) { - if (p->new_name == p->old_name) { - char *prefixed = p->new_name; - prefix_one(&prefixed); - p->new_name = p->old_name = prefixed; - } - else { - prefix_one(&p->new_name); - prefix_one(&p->old_name); - } - } -} - -#define INACCURATE_EOF (1<<0) -#define RECOUNT (1<<1) - -static int apply_patch(int fd, const char *filename, int options) -{ - size_t offset; - struct strbuf buf = STRBUF_INIT; - struct patch *list = NULL, **listp = &list; - int skipped_patch = 0; - - /* FIXME - memory leak when using multiple patch files as inputs */ - memset(&fn_table, 0, sizeof(struct string_list)); - patch_input_file = filename; - read_patch_file(&buf, fd); - offset = 0; - while (offset < buf.len) { - struct patch *patch; - int nr; - - patch = xcalloc(1, sizeof(*patch)); - patch->inaccurate_eof = !!(options & INACCURATE_EOF); - patch->recount = !!(options & RECOUNT); - nr = parse_chunk(buf.buf + offset, buf.len - offset, patch); - if (nr < 0) - break; - if (apply_in_reverse) - reverse_patches(patch); - if (prefix) - prefix_patches(patch); - if (use_patch(patch)) { - patch_stats(patch); - *listp = patch; - listp = &patch->next; - } - else { - /* perhaps free it a bit better? */ - free(patch); - skipped_patch++; - } - offset += nr; - } - - if (whitespace_error && (ws_error_action == die_on_ws_error)) - apply = 0; - - update_index = check_index && apply; - if (update_index && newfd < 0) - newfd = hold_locked_index(&lock_file, 1); - - if (check_index) { - if (read_cache() < 0) - die("unable to read index file"); - } - - if ((check || apply) && - check_patch_list(list) < 0 && - !apply_with_reject) - exit(1); - - if (apply && write_out_results(list, skipped_patch)) - exit(1); - - if (fake_ancestor) - build_fake_ancestor(list, fake_ancestor); - - if (diffstat) - stat_patch_list(list); - - if (numstat) - numstat_patch_list(list); - - if (summary) - summary_patch_list(list); - - strbuf_release(&buf); - return 0; -} - -static int git_apply_config(const char *var, const char *value, void *cb) -{ - if (!strcmp(var, "apply.whitespace")) - return git_config_string(&apply_default_whitespace, var, value); - else if (!strcmp(var, "apply.ignorewhitespace")) - return git_config_string(&apply_default_ignorewhitespace, var, value); - return git_default_config(var, value, cb); -} - -static int option_parse_exclude(const struct option *opt, - const char *arg, int unset) -{ - add_name_limit(arg, 1); - return 0; -} - -static int option_parse_include(const struct option *opt, - const char *arg, int unset) -{ - add_name_limit(arg, 0); - has_include = 1; - return 0; -} - -static int option_parse_p(const struct option *opt, - const char *arg, int unset) -{ - p_value = atoi(arg); - p_value_known = 1; - return 0; -} - -static int option_parse_z(const struct option *opt, - const char *arg, int unset) -{ - if (unset) - line_termination = '\n'; - else - line_termination = 0; - return 0; -} - -static int option_parse_space_change(const struct option *opt, - const char *arg, int unset) -{ - if (unset) - ws_ignore_action = ignore_ws_none; - else - ws_ignore_action = ignore_ws_change; - return 0; -} - -static int option_parse_whitespace(const struct option *opt, - const char *arg, int unset) -{ - const char **whitespace_option = opt->value; - - *whitespace_option = arg; - parse_whitespace_option(arg); - return 0; -} - -static int option_parse_directory(const struct option *opt, - const char *arg, int unset) -{ - root_len = strlen(arg); - if (root_len && arg[root_len - 1] != '/') { - char *new_root; - root = new_root = xmalloc(root_len + 2); - strcpy(new_root, arg); - strcpy(new_root + root_len++, "/"); - } else - root = arg; - return 0; -} - -int cmd_apply(int argc, const char **argv, const char *unused_prefix) -{ - int i; - int errs = 0; - int is_not_gitdir; - int binary; - int force_apply = 0; - - const char *whitespace_option = NULL; - - struct option builtin_apply_options[] = { - { OPTION_CALLBACK, 0, "exclude", NULL, "path", - "don't apply changes matching the given path", - 0, option_parse_exclude }, - { OPTION_CALLBACK, 0, "include", NULL, "path", - "apply changes matching the given path", - 0, option_parse_include }, - { OPTION_CALLBACK, 'p', NULL, NULL, "num", - "remove <num> leading slashes from traditional diff paths", - 0, option_parse_p }, - OPT_BOOLEAN(0, "no-add", &no_add, - "ignore additions made by the patch"), - OPT_BOOLEAN(0, "stat", &diffstat, - "instead of applying the patch, output diffstat for the input"), - { OPTION_BOOLEAN, 0, "allow-binary-replacement", &binary, - NULL, "old option, now no-op", - PARSE_OPT_HIDDEN | PARSE_OPT_NOARG }, - { OPTION_BOOLEAN, 0, "binary", &binary, - NULL, "old option, now no-op", - PARSE_OPT_HIDDEN | PARSE_OPT_NOARG }, - OPT_BOOLEAN(0, "numstat", &numstat, - "shows number of added and deleted lines in decimal notation"), - OPT_BOOLEAN(0, "summary", &summary, - "instead of applying the patch, output a summary for the input"), - OPT_BOOLEAN(0, "check", &check, - "instead of applying the patch, see if the patch is applicable"), - OPT_BOOLEAN(0, "index", &check_index, - "make sure the patch is applicable to the current index"), - OPT_BOOLEAN(0, "cached", &cached, - "apply a patch without touching the working tree"), - OPT_BOOLEAN(0, "apply", &force_apply, - "also apply the patch (use with --stat/--summary/--check)"), - OPT_FILENAME(0, "build-fake-ancestor", &fake_ancestor, - "build a temporary index based on embedded index information"), - { OPTION_CALLBACK, 'z', NULL, NULL, NULL, - "paths are separated with NUL character", - PARSE_OPT_NOARG, option_parse_z }, - OPT_INTEGER('C', NULL, &p_context, - "ensure at least <n> lines of context match"), - { OPTION_CALLBACK, 0, "whitespace", &whitespace_option, "action", - "detect new or modified lines that have whitespace errors", - 0, option_parse_whitespace }, - { OPTION_CALLBACK, 0, "ignore-space-change", NULL, NULL, - "ignore changes in whitespace when finding context", - PARSE_OPT_NOARG, option_parse_space_change }, - { OPTION_CALLBACK, 0, "ignore-whitespace", NULL, NULL, - "ignore changes in whitespace when finding context", - PARSE_OPT_NOARG, option_parse_space_change }, - OPT_BOOLEAN('R', "reverse", &apply_in_reverse, - "apply the patch in reverse"), - OPT_BOOLEAN(0, "unidiff-zero", &unidiff_zero, - "don't expect at least one line of context"), - OPT_BOOLEAN(0, "reject", &apply_with_reject, - "leave the rejected hunks in corresponding *.rej files"), - OPT__VERBOSE(&apply_verbosely), - OPT_BIT(0, "inaccurate-eof", &options, - "tolerate incorrectly detected missing new-line at the end of file", - INACCURATE_EOF), - OPT_BIT(0, "recount", &options, - "do not trust the line counts in the hunk headers", - RECOUNT), - { OPTION_CALLBACK, 0, "directory", NULL, "root", - "prepend <root> to all filenames", - 0, option_parse_directory }, - OPT_END() - }; - - prefix = setup_git_directory_gently(&is_not_gitdir); - prefix_length = prefix ? strlen(prefix) : 0; - git_config(git_apply_config, NULL); - if (apply_default_whitespace) - parse_whitespace_option(apply_default_whitespace); - if (apply_default_ignorewhitespace) - parse_ignorewhitespace_option(apply_default_ignorewhitespace); - - argc = parse_options(argc, argv, prefix, builtin_apply_options, - apply_usage, 0); - - if (apply_with_reject) - apply = apply_verbosely = 1; - if (!force_apply && (diffstat || numstat || summary || check || fake_ancestor)) - apply = 0; - if (check_index && is_not_gitdir) - die("--index outside a repository"); - if (cached) { - if (is_not_gitdir) - die("--cached outside a repository"); - check_index = 1; - } - for (i = 0; i < argc; i++) { - const char *arg = argv[i]; - int fd; - - if (!strcmp(arg, "-")) { - errs |= apply_patch(0, "<stdin>", options); - read_stdin = 0; - continue; - } else if (0 < prefix_length) - arg = prefix_filename(prefix, prefix_length, arg); - - fd = open(arg, O_RDONLY); - if (fd < 0) - die_errno("can't open patch '%s'", arg); - read_stdin = 0; - set_default_whitespace_mode(whitespace_option); - errs |= apply_patch(fd, arg, options); - close(fd); - } - set_default_whitespace_mode(whitespace_option); - if (read_stdin) - errs |= apply_patch(0, "<stdin>", options); - if (whitespace_error) { - if (squelch_whitespace_errors && - squelch_whitespace_errors < whitespace_error) { - int squelched = - whitespace_error - squelch_whitespace_errors; - warning("squelched %d " - "whitespace error%s", - squelched, - squelched == 1 ? "" : "s"); - } - if (ws_error_action == die_on_ws_error) - die("%d line%s add%s whitespace errors.", - whitespace_error, - whitespace_error == 1 ? "" : "s", - whitespace_error == 1 ? "s" : ""); - if (applied_after_fixing_ws && apply) - warning("%d line%s applied after" - " fixing whitespace errors.", - applied_after_fixing_ws, - applied_after_fixing_ws == 1 ? "" : "s"); - else if (whitespace_error) - warning("%d line%s add%s whitespace errors.", - whitespace_error, - whitespace_error == 1 ? "" : "s", - whitespace_error == 1 ? "s" : ""); - } - - if (update_index) { - if (write_cache(newfd, active_cache, active_nr) || - commit_locked_index(&lock_file)) - die("Unable to write new index file"); - } - - return !!errs; -} |