diff options
Diffstat (limited to 'builtin/update-index.c')
| -rw-r--r-- | builtin/update-index.c | 955 |
1 files changed, 955 insertions, 0 deletions
diff --git a/builtin/update-index.c b/builtin/update-index.c new file mode 100644 index 0000000000..b0e3dc9105 --- /dev/null +++ b/builtin/update-index.c @@ -0,0 +1,955 @@ +/* + * GIT - The information manager from hell + * + * Copyright (C) Linus Torvalds, 2005 + */ +#include "cache.h" +#include "lockfile.h" +#include "quote.h" +#include "cache-tree.h" +#include "tree-walk.h" +#include "builtin.h" +#include "refs.h" +#include "resolve-undo.h" +#include "parse-options.h" +#include "pathspec.h" +#include "dir.h" +#include "split-index.h" + +/* + * Default to not allowing changes to the list of files. The + * tool doesn't actually care, but this makes it harder to add + * files to the revision control by mistake by doing something + * like "git update-index *" and suddenly having all the object + * files be revision controlled. + */ +static int allow_add; +static int allow_remove; +static int allow_replace; +static int info_only; +static int force_remove; +static int verbose; +static int mark_valid_only; +static int mark_skip_worktree_only; +#define MARK_FLAG 1 +#define UNMARK_FLAG 2 + +__attribute__((format (printf, 1, 2))) +static void report(const char *fmt, ...) +{ + va_list vp; + + if (!verbose) + return; + + va_start(vp, fmt); + vprintf(fmt, vp); + putchar('\n'); + va_end(vp); +} + +static int mark_ce_flags(const char *path, int flag, int mark) +{ + int namelen = strlen(path); + int pos = cache_name_pos(path, namelen); + if (0 <= pos) { + if (mark) + active_cache[pos]->ce_flags |= flag; + else + active_cache[pos]->ce_flags &= ~flag; + active_cache[pos]->ce_flags |= CE_UPDATE_IN_BASE; + cache_tree_invalidate_path(&the_index, path); + active_cache_changed |= CE_ENTRY_CHANGED; + return 0; + } + return -1; +} + +static int remove_one_path(const char *path) +{ + if (!allow_remove) + return error("%s: does not exist and --remove not passed", path); + if (remove_file_from_cache(path)) + return error("%s: cannot remove from the index", path); + return 0; +} + +/* + * Handle a path that couldn't be lstat'ed. It's either: + * - missing file (ENOENT or ENOTDIR). That's ok if we're + * supposed to be removing it and the removal actually + * succeeds. + * - permission error. That's never ok. + */ +static int process_lstat_error(const char *path, int err) +{ + if (err == ENOENT || err == ENOTDIR) + return remove_one_path(path); + return error("lstat(\"%s\"): %s", path, strerror(errno)); +} + +static int add_one_path(const struct cache_entry *old, const char *path, int len, struct stat *st) +{ + int option, size; + struct cache_entry *ce; + + /* Was the old index entry already up-to-date? */ + if (old && !ce_stage(old) && !ce_match_stat(old, st, 0)) + return 0; + + size = cache_entry_size(len); + ce = xcalloc(1, size); + memcpy(ce->name, path, len); + ce->ce_flags = create_ce_flags(0); + ce->ce_namelen = len; + fill_stat_cache_info(ce, st); + ce->ce_mode = ce_mode_from_stat(old, st->st_mode); + + if (index_path(ce->sha1, path, st, + info_only ? 0 : HASH_WRITE_OBJECT)) { + free(ce); + return -1; + } + option = allow_add ? ADD_CACHE_OK_TO_ADD : 0; + option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0; + if (add_cache_entry(ce, option)) + return error("%s: cannot add to the index - missing --add option?", path); + return 0; +} + +/* + * Handle a path that was a directory. Four cases: + * + * - it's already a gitlink in the index, and we keep it that + * way, and update it if we can (if we cannot find the HEAD, + * we're going to keep it unchanged in the index!) + * + * - it's a *file* in the index, in which case it should be + * removed as a file if removal is allowed, since it doesn't + * exist as such any more. If removal isn't allowed, it's + * an error. + * + * (NOTE! This is old and arguably fairly strange behaviour. + * We might want to make this an error unconditionally, and + * use "--force-remove" if you actually want to force removal). + * + * - it used to exist as a subdirectory (ie multiple files with + * this particular prefix) in the index, in which case it's wrong + * to try to update it as a directory. + * + * - it doesn't exist at all in the index, but it is a valid + * git directory, and it should be *added* as a gitlink. + */ +static int process_directory(const char *path, int len, struct stat *st) +{ + unsigned char sha1[20]; + int pos = cache_name_pos(path, len); + + /* Exact match: file or existing gitlink */ + if (pos >= 0) { + const struct cache_entry *ce = active_cache[pos]; + if (S_ISGITLINK(ce->ce_mode)) { + + /* Do nothing to the index if there is no HEAD! */ + if (resolve_gitlink_ref(path, "HEAD", sha1) < 0) + return 0; + + return add_one_path(ce, path, len, st); + } + /* Should this be an unconditional error? */ + return remove_one_path(path); + } + + /* Inexact match: is there perhaps a subdirectory match? */ + pos = -pos-1; + while (pos < active_nr) { + const struct cache_entry *ce = active_cache[pos++]; + + if (strncmp(ce->name, path, len)) + break; + if (ce->name[len] > '/') + break; + if (ce->name[len] < '/') + continue; + + /* Subdirectory match - error out */ + return error("%s: is a directory - add individual files instead", path); + } + + /* No match - should we add it as a gitlink? */ + if (!resolve_gitlink_ref(path, "HEAD", sha1)) + return add_one_path(NULL, path, len, st); + + /* Error out. */ + return error("%s: is a directory - add files inside instead", path); +} + +static int process_path(const char *path) +{ + int pos, len; + struct stat st; + const struct cache_entry *ce; + + len = strlen(path); + if (has_symlink_leading_path(path, len)) + return error("'%s' is beyond a symbolic link", path); + + pos = cache_name_pos(path, len); + ce = pos < 0 ? NULL : active_cache[pos]; + if (ce && ce_skip_worktree(ce)) { + /* + * working directory version is assumed "good" + * so updating it does not make sense. + * On the other hand, removing it from index should work + */ + if (allow_remove && remove_file_from_cache(path)) + return error("%s: cannot remove from the index", path); + return 0; + } + + /* + * First things first: get the stat information, to decide + * what to do about the pathname! + */ + if (lstat(path, &st) < 0) + return process_lstat_error(path, errno); + + if (S_ISDIR(st.st_mode)) + return process_directory(path, len, &st); + + return add_one_path(ce, path, len, &st); +} + +static int add_cacheinfo(unsigned int mode, const unsigned char *sha1, + const char *path, int stage) +{ + int size, len, option; + struct cache_entry *ce; + + if (!verify_path(path)) + return error("Invalid path '%s'", path); + + len = strlen(path); + size = cache_entry_size(len); + ce = xcalloc(1, size); + + hashcpy(ce->sha1, sha1); + memcpy(ce->name, path, len); + ce->ce_flags = create_ce_flags(stage); + ce->ce_namelen = len; + ce->ce_mode = create_ce_mode(mode); + if (assume_unchanged) + ce->ce_flags |= CE_VALID; + option = allow_add ? ADD_CACHE_OK_TO_ADD : 0; + option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0; + if (add_cache_entry(ce, option)) + return error("%s: cannot add to the index - missing --add option?", + path); + report("add '%s'", path); + return 0; +} + +static void chmod_path(int flip, const char *path) +{ + int pos; + struct cache_entry *ce; + unsigned int mode; + + pos = cache_name_pos(path, strlen(path)); + if (pos < 0) + goto fail; + ce = active_cache[pos]; + mode = ce->ce_mode; + if (!S_ISREG(mode)) + goto fail; + switch (flip) { + case '+': + ce->ce_mode |= 0111; break; + case '-': + ce->ce_mode &= ~0111; break; + default: + goto fail; + } + cache_tree_invalidate_path(&the_index, path); + ce->ce_flags |= CE_UPDATE_IN_BASE; + active_cache_changed |= CE_ENTRY_CHANGED; + report("chmod %cx '%s'", flip, path); + return; + fail: + die("git update-index: cannot chmod %cx '%s'", flip, path); +} + +static void update_one(const char *path) +{ + if (!verify_path(path)) { + fprintf(stderr, "Ignoring path %s\n", path); + return; + } + if (mark_valid_only) { + if (mark_ce_flags(path, CE_VALID, mark_valid_only == MARK_FLAG)) + die("Unable to mark file %s", path); + return; + } + if (mark_skip_worktree_only) { + if (mark_ce_flags(path, CE_SKIP_WORKTREE, mark_skip_worktree_only == MARK_FLAG)) + die("Unable to mark file %s", path); + return; + } + + if (force_remove) { + if (remove_file_from_cache(path)) + die("git update-index: unable to remove %s", path); + report("remove '%s'", path); + return; + } + if (process_path(path)) + die("Unable to process path %s", path); + report("add '%s'", path); +} + +static void read_index_info(int line_termination) +{ + struct strbuf buf = STRBUF_INIT; + struct strbuf uq = STRBUF_INIT; + + while (strbuf_getline(&buf, stdin, line_termination) != EOF) { + char *ptr, *tab; + char *path_name; + unsigned char sha1[20]; + unsigned int mode; + unsigned long ul; + int stage; + + /* This reads lines formatted in one of three formats: + * + * (1) mode SP sha1 TAB path + * The first format is what "git apply --index-info" + * reports, and used to reconstruct a partial tree + * that is used for phony merge base tree when falling + * back on 3-way merge. + * + * (2) mode SP type SP sha1 TAB path + * The second format is to stuff "git ls-tree" output + * into the index file. + * + * (3) mode SP sha1 SP stage TAB path + * This format is to put higher order stages into the + * index file and matches "git ls-files --stage" output. + */ + errno = 0; + ul = strtoul(buf.buf, &ptr, 8); + if (ptr == buf.buf || *ptr != ' ' + || errno || (unsigned int) ul != ul) + goto bad_line; + mode = ul; + + tab = strchr(ptr, '\t'); + if (!tab || tab - ptr < 41) + goto bad_line; + + if (tab[-2] == ' ' && '0' <= tab[-1] && tab[-1] <= '3') { + stage = tab[-1] - '0'; + ptr = tab + 1; /* point at the head of path */ + tab = tab - 2; /* point at tail of sha1 */ + } + else { + stage = 0; + ptr = tab + 1; /* point at the head of path */ + } + + if (get_sha1_hex(tab - 40, sha1) || tab[-41] != ' ') + goto bad_line; + + path_name = ptr; + if (line_termination && path_name[0] == '"') { + strbuf_reset(&uq); + if (unquote_c_style(&uq, path_name, NULL)) { + die("git update-index: bad quoting of path name"); + } + path_name = uq.buf; + } + + if (!verify_path(path_name)) { + fprintf(stderr, "Ignoring path %s\n", path_name); + continue; + } + + if (!mode) { + /* mode == 0 means there is no such path -- remove */ + if (remove_file_from_cache(path_name)) + die("git update-index: unable to remove %s", + ptr); + } + else { + /* mode ' ' sha1 '\t' name + * ptr[-1] points at tab, + * ptr[-41] is at the beginning of sha1 + */ + ptr[-42] = ptr[-1] = 0; + if (add_cacheinfo(mode, sha1, path_name, stage)) + die("git update-index: unable to update %s", + path_name); + } + continue; + + bad_line: + die("malformed index info %s", buf.buf); + } + strbuf_release(&buf); + strbuf_release(&uq); +} + +static const char * const update_index_usage[] = { + N_("git update-index [options] [--] [<file>...]"), + NULL +}; + +static unsigned char head_sha1[20]; +static unsigned char merge_head_sha1[20]; + +static struct cache_entry *read_one_ent(const char *which, + unsigned char *ent, const char *path, + int namelen, int stage) +{ + unsigned mode; + unsigned char sha1[20]; + int size; + struct cache_entry *ce; + + if (get_tree_entry(ent, path, sha1, &mode)) { + if (which) + error("%s: not in %s branch.", path, which); + return NULL; + } + if (mode == S_IFDIR) { + if (which) + error("%s: not a blob in %s branch.", path, which); + return NULL; + } + size = cache_entry_size(namelen); + ce = xcalloc(1, size); + + hashcpy(ce->sha1, sha1); + memcpy(ce->name, path, namelen); + ce->ce_flags = create_ce_flags(stage); + ce->ce_namelen = namelen; + ce->ce_mode = create_ce_mode(mode); + return ce; +} + +static int unresolve_one(const char *path) +{ + int namelen = strlen(path); + int pos; + int ret = 0; + struct cache_entry *ce_2 = NULL, *ce_3 = NULL; + + /* See if there is such entry in the index. */ + pos = cache_name_pos(path, namelen); + if (0 <= pos) { + /* already merged */ + pos = unmerge_cache_entry_at(pos); + if (pos < active_nr) { + const struct cache_entry *ce = active_cache[pos]; + if (ce_stage(ce) && + ce_namelen(ce) == namelen && + !memcmp(ce->name, path, namelen)) + return 0; + } + /* no resolve-undo information; fall back */ + } else { + /* If there isn't, either it is unmerged, or + * resolved as "removed" by mistake. We do not + * want to do anything in the former case. + */ + pos = -pos-1; + if (pos < active_nr) { + const struct cache_entry *ce = active_cache[pos]; + if (ce_namelen(ce) == namelen && + !memcmp(ce->name, path, namelen)) { + fprintf(stderr, + "%s: skipping still unmerged path.\n", + path); + goto free_return; + } + } + } + + /* Grab blobs from given path from HEAD and MERGE_HEAD, + * stuff HEAD version in stage #2, + * stuff MERGE_HEAD version in stage #3. + */ + ce_2 = read_one_ent("our", head_sha1, path, namelen, 2); + ce_3 = read_one_ent("their", merge_head_sha1, path, namelen, 3); + + if (!ce_2 || !ce_3) { + ret = -1; + goto free_return; + } + if (!hashcmp(ce_2->sha1, ce_3->sha1) && + ce_2->ce_mode == ce_3->ce_mode) { + fprintf(stderr, "%s: identical in both, skipping.\n", + path); + goto free_return; + } + + remove_file_from_cache(path); + if (add_cache_entry(ce_2, ADD_CACHE_OK_TO_ADD)) { + error("%s: cannot add our version to the index.", path); + ret = -1; + goto free_return; + } + if (!add_cache_entry(ce_3, ADD_CACHE_OK_TO_ADD)) + return 0; + error("%s: cannot add their version to the index.", path); + ret = -1; + free_return: + free(ce_2); + free(ce_3); + return ret; +} + +static void read_head_pointers(void) +{ + if (read_ref("HEAD", head_sha1)) + die("No HEAD -- no initial commit yet?"); + if (read_ref("MERGE_HEAD", merge_head_sha1)) { + fprintf(stderr, "Not in the middle of a merge.\n"); + exit(0); + } +} + +static int do_unresolve(int ac, const char **av, + const char *prefix, int prefix_length) +{ + int i; + int err = 0; + + /* Read HEAD and MERGE_HEAD; if MERGE_HEAD does not exist, we + * are not doing a merge, so exit with success status. + */ + read_head_pointers(); + + for (i = 1; i < ac; i++) { + const char *arg = av[i]; + const char *p = prefix_path(prefix, prefix_length, arg); + err |= unresolve_one(p); + if (p < arg || p > arg + strlen(arg)) + free((char *)p); + } + return err; +} + +static int do_reupdate(int ac, const char **av, + const char *prefix, int prefix_length) +{ + /* Read HEAD and run update-index on paths that are + * merged and already different between index and HEAD. + */ + int pos; + int has_head = 1; + struct pathspec pathspec; + + parse_pathspec(&pathspec, 0, + PATHSPEC_PREFER_CWD, + prefix, av + 1); + + if (read_ref("HEAD", head_sha1)) + /* If there is no HEAD, that means it is an initial + * commit. Update everything in the index. + */ + has_head = 0; + redo: + for (pos = 0; pos < active_nr; pos++) { + const struct cache_entry *ce = active_cache[pos]; + struct cache_entry *old = NULL; + int save_nr; + char *path; + + if (ce_stage(ce) || !ce_path_match(ce, &pathspec, NULL)) + continue; + if (has_head) + old = read_one_ent(NULL, head_sha1, + ce->name, ce_namelen(ce), 0); + if (old && ce->ce_mode == old->ce_mode && + !hashcmp(ce->sha1, old->sha1)) { + free(old); + continue; /* unchanged */ + } + /* Be careful. The working tree may not have the + * path anymore, in which case, under 'allow_remove', + * or worse yet 'allow_replace', active_nr may decrease. + */ + save_nr = active_nr; + path = xstrdup(ce->name); + update_one(path); + free(path); + if (save_nr != active_nr) + goto redo; + } + free_pathspec(&pathspec); + return 0; +} + +struct refresh_params { + unsigned int flags; + int *has_errors; +}; + +static int refresh(struct refresh_params *o, unsigned int flag) +{ + setup_work_tree(); + read_cache_preload(NULL); + *o->has_errors |= refresh_cache(o->flags | flag); + return 0; +} + +static int refresh_callback(const struct option *opt, + const char *arg, int unset) +{ + return refresh(opt->value, 0); +} + +static int really_refresh_callback(const struct option *opt, + const char *arg, int unset) +{ + return refresh(opt->value, REFRESH_REALLY); +} + +static int chmod_callback(const struct option *opt, + const char *arg, int unset) +{ + char *flip = opt->value; + if ((arg[0] != '-' && arg[0] != '+') || arg[1] != 'x' || arg[2]) + return error("option 'chmod' expects \"+x\" or \"-x\""); + *flip = arg[0]; + return 0; +} + +static int resolve_undo_clear_callback(const struct option *opt, + const char *arg, int unset) +{ + resolve_undo_clear(); + return 0; +} + +static int parse_new_style_cacheinfo(const char *arg, + unsigned int *mode, + unsigned char sha1[], + const char **path) +{ + unsigned long ul; + char *endp; + + if (!arg) + return -1; + + errno = 0; + ul = strtoul(arg, &endp, 8); + if (errno || endp == arg || *endp != ',' || (unsigned int) ul != ul) + return -1; /* not a new-style cacheinfo */ + *mode = ul; + endp++; + if (get_sha1_hex(endp, sha1) || endp[40] != ',') + return -1; + *path = endp + 41; + return 0; +} + +static int cacheinfo_callback(struct parse_opt_ctx_t *ctx, + const struct option *opt, int unset) +{ + unsigned char sha1[20]; + unsigned int mode; + const char *path; + + if (!parse_new_style_cacheinfo(ctx->argv[1], &mode, sha1, &path)) { + if (add_cacheinfo(mode, sha1, path, 0)) + die("git update-index: --cacheinfo cannot add %s", path); + ctx->argv++; + ctx->argc--; + return 0; + } + if (ctx->argc <= 3) + return error("option 'cacheinfo' expects <mode>,<sha1>,<path>"); + if (strtoul_ui(*++ctx->argv, 8, &mode) || + get_sha1_hex(*++ctx->argv, sha1) || + add_cacheinfo(mode, sha1, *++ctx->argv, 0)) + die("git update-index: --cacheinfo cannot add %s", *ctx->argv); + ctx->argc -= 3; + return 0; +} + +static int stdin_cacheinfo_callback(struct parse_opt_ctx_t *ctx, + const struct option *opt, int unset) +{ + int *line_termination = opt->value; + + if (ctx->argc != 1) + return error("option '%s' must be the last argument", opt->long_name); + allow_add = allow_replace = allow_remove = 1; + read_index_info(*line_termination); + return 0; +} + +static int stdin_callback(struct parse_opt_ctx_t *ctx, + const struct option *opt, int unset) +{ + int *read_from_stdin = opt->value; + + if (ctx->argc != 1) + return error("option '%s' must be the last argument", opt->long_name); + *read_from_stdin = 1; + return 0; +} + +static int unresolve_callback(struct parse_opt_ctx_t *ctx, + const struct option *opt, int flags) +{ + int *has_errors = opt->value; + const char *prefix = startup_info->prefix; + + /* consume remaining arguments. */ + *has_errors = do_unresolve(ctx->argc, ctx->argv, + prefix, prefix ? strlen(prefix) : 0); + if (*has_errors) + active_cache_changed = 0; + + ctx->argv += ctx->argc - 1; + ctx->argc = 1; + return 0; +} + +static int reupdate_callback(struct parse_opt_ctx_t *ctx, + const struct option *opt, int flags) +{ + int *has_errors = opt->value; + const char *prefix = startup_info->prefix; + + /* consume remaining arguments. */ + setup_work_tree(); + *has_errors = do_reupdate(ctx->argc, ctx->argv, + prefix, prefix ? strlen(prefix) : 0); + if (*has_errors) + active_cache_changed = 0; + + ctx->argv += ctx->argc - 1; + ctx->argc = 1; + return 0; +} + +int cmd_update_index(int argc, const char **argv, const char *prefix) +{ + int newfd, entries, has_errors = 0, line_termination = '\n'; + int read_from_stdin = 0; + int prefix_length = prefix ? strlen(prefix) : 0; + int preferred_index_format = 0; + char set_executable_bit = 0; + struct refresh_params refresh_args = {0, &has_errors}; + int lock_error = 0; + int split_index = -1; + struct lock_file *lock_file; + struct parse_opt_ctx_t ctx; + int parseopt_state = PARSE_OPT_UNKNOWN; + struct option options[] = { + OPT_BIT('q', NULL, &refresh_args.flags, + N_("continue refresh even when index needs update"), + REFRESH_QUIET), + OPT_BIT(0, "ignore-submodules", &refresh_args.flags, + N_("refresh: ignore submodules"), + REFRESH_IGNORE_SUBMODULES), + OPT_SET_INT(0, "add", &allow_add, + N_("do not ignore new files"), 1), + OPT_SET_INT(0, "replace", &allow_replace, + N_("let files replace directories and vice-versa"), 1), + OPT_SET_INT(0, "remove", &allow_remove, + N_("notice files missing from worktree"), 1), + OPT_BIT(0, "unmerged", &refresh_args.flags, + N_("refresh even if index contains unmerged entries"), + REFRESH_UNMERGED), + {OPTION_CALLBACK, 0, "refresh", &refresh_args, NULL, + N_("refresh stat information"), + PARSE_OPT_NOARG | PARSE_OPT_NONEG, + refresh_callback}, + {OPTION_CALLBACK, 0, "really-refresh", &refresh_args, NULL, + N_("like --refresh, but ignore assume-unchanged setting"), + PARSE_OPT_NOARG | PARSE_OPT_NONEG, + really_refresh_callback}, + {OPTION_LOWLEVEL_CALLBACK, 0, "cacheinfo", NULL, + N_("<mode>,<object>,<path>"), + N_("add the specified entry to the index"), + PARSE_OPT_NOARG | /* disallow --cacheinfo=<mode> form */ + PARSE_OPT_NONEG | PARSE_OPT_LITERAL_ARGHELP, + (parse_opt_cb *) cacheinfo_callback}, + {OPTION_CALLBACK, 0, "chmod", &set_executable_bit, N_("(+/-)x"), + N_("override the executable bit of the listed files"), + PARSE_OPT_NONEG | PARSE_OPT_LITERAL_ARGHELP, + chmod_callback}, + {OPTION_SET_INT, 0, "assume-unchanged", &mark_valid_only, NULL, + N_("mark files as \"not changing\""), + PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, MARK_FLAG}, + {OPTION_SET_INT, 0, "no-assume-unchanged", &mark_valid_only, NULL, + N_("clear assumed-unchanged bit"), + PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, UNMARK_FLAG}, + {OPTION_SET_INT, 0, "skip-worktree", &mark_skip_worktree_only, NULL, + N_("mark files as \"index-only\""), + PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, MARK_FLAG}, + {OPTION_SET_INT, 0, "no-skip-worktree", &mark_skip_worktree_only, NULL, + N_("clear skip-worktree bit"), + PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, UNMARK_FLAG}, + OPT_SET_INT(0, "info-only", &info_only, + N_("add to index only; do not add content to object database"), 1), + OPT_SET_INT(0, "force-remove", &force_remove, + N_("remove named paths even if present in worktree"), 1), + OPT_SET_INT('z', NULL, &line_termination, + N_("with --stdin: input lines are terminated by null bytes"), '\0'), + {OPTION_LOWLEVEL_CALLBACK, 0, "stdin", &read_from_stdin, NULL, + N_("read list of paths to be updated from standard input"), + PARSE_OPT_NONEG | PARSE_OPT_NOARG, + (parse_opt_cb *) stdin_callback}, + {OPTION_LOWLEVEL_CALLBACK, 0, "index-info", &line_termination, NULL, + N_("add entries from standard input to the index"), + PARSE_OPT_NONEG | PARSE_OPT_NOARG, + (parse_opt_cb *) stdin_cacheinfo_callback}, + {OPTION_LOWLEVEL_CALLBACK, 0, "unresolve", &has_errors, NULL, + N_("repopulate stages #2 and #3 for the listed paths"), + PARSE_OPT_NONEG | PARSE_OPT_NOARG, + (parse_opt_cb *) unresolve_callback}, + {OPTION_LOWLEVEL_CALLBACK, 'g', "again", &has_errors, NULL, + N_("only update entries that differ from HEAD"), + PARSE_OPT_NONEG | PARSE_OPT_NOARG, + (parse_opt_cb *) reupdate_callback}, + OPT_BIT(0, "ignore-missing", &refresh_args.flags, + N_("ignore files missing from worktree"), + REFRESH_IGNORE_MISSING), + OPT_SET_INT(0, "verbose", &verbose, + N_("report actions to standard output"), 1), + {OPTION_CALLBACK, 0, "clear-resolve-undo", NULL, NULL, + N_("(for porcelains) forget saved unresolved conflicts"), + PARSE_OPT_NOARG | PARSE_OPT_NONEG, + resolve_undo_clear_callback}, + OPT_INTEGER(0, "index-version", &preferred_index_format, + N_("write index in this format")), + OPT_BOOL(0, "split-index", &split_index, + N_("enable or disable split index")), + OPT_END() + }; + + if (argc == 2 && !strcmp(argv[1], "-h")) + usage_with_options(update_index_usage, options); + + git_config(git_default_config, NULL); + + /* We can't free this memory, it becomes part of a linked list parsed atexit() */ + lock_file = xcalloc(1, sizeof(struct lock_file)); + + newfd = hold_locked_index(lock_file, 0); + if (newfd < 0) + lock_error = errno; + + entries = read_cache(); + if (entries < 0) + die("cache corrupted"); + + /* + * Custom copy of parse_options() because we want to handle + * filename arguments as they come. + */ + parse_options_start(&ctx, argc, argv, prefix, + options, PARSE_OPT_STOP_AT_NON_OPTION); + while (ctx.argc) { + if (parseopt_state != PARSE_OPT_DONE) + parseopt_state = parse_options_step(&ctx, options, + update_index_usage); + if (!ctx.argc) + break; + switch (parseopt_state) { + case PARSE_OPT_HELP: + exit(129); + case PARSE_OPT_NON_OPTION: + case PARSE_OPT_DONE: + { + const char *path = ctx.argv[0]; + const char *p; + + setup_work_tree(); + p = prefix_path(prefix, prefix_length, path); + update_one(p); + if (set_executable_bit) + chmod_path(set_executable_bit, p); + free((char *)p); + ctx.argc--; + ctx.argv++; + break; + } + case PARSE_OPT_UNKNOWN: + if (ctx.argv[0][1] == '-') + error("unknown option '%s'", ctx.argv[0] + 2); + else + error("unknown switch '%c'", *ctx.opt); + usage_with_options(update_index_usage, options); + } + } + argc = parse_options_end(&ctx); + if (preferred_index_format) { + if (preferred_index_format < INDEX_FORMAT_LB || + INDEX_FORMAT_UB < preferred_index_format) + die("index-version %d not in range: %d..%d", + preferred_index_format, + INDEX_FORMAT_LB, INDEX_FORMAT_UB); + + if (the_index.version != preferred_index_format) + active_cache_changed |= SOMETHING_CHANGED; + the_index.version = preferred_index_format; + } + + if (read_from_stdin) { + struct strbuf buf = STRBUF_INIT, nbuf = STRBUF_INIT; + + setup_work_tree(); + while (strbuf_getline(&buf, stdin, line_termination) != EOF) { + const char *p; + if (line_termination && buf.buf[0] == '"') { + strbuf_reset(&nbuf); + if (unquote_c_style(&nbuf, buf.buf, NULL)) + die("line is badly quoted"); + strbuf_swap(&buf, &nbuf); + } + p = prefix_path(prefix, prefix_length, buf.buf); + update_one(p); + if (set_executable_bit) + chmod_path(set_executable_bit, p); + free((char *)p); + } + strbuf_release(&nbuf); + strbuf_release(&buf); + } + + if (split_index > 0) { + init_split_index(&the_index); + the_index.cache_changed |= SPLIT_INDEX_ORDERED; + } else if (!split_index && the_index.split_index) { + /* + * can't discard_split_index(&the_index); because that + * will destroy split_index->base->cache[], which may + * be shared with the_index.cache[]. So yeah we're + * leaking a bit here. + */ + the_index.split_index = NULL; + the_index.cache_changed |= SOMETHING_CHANGED; + } + + if (active_cache_changed) { + if (newfd < 0) { + if (refresh_args.flags & REFRESH_QUIET) + exit(128); + unable_to_lock_die(get_index_file(), lock_error); + } + if (write_locked_index(&the_index, lock_file, COMMIT_LOCK)) + die("Unable to write new index file"); + } + + rollback_lock_file(lock_file); + + return has_errors ? 1 : 0; +} |