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-rw-r--r--add-patch.c1338
1 files changed, 1338 insertions, 0 deletions
diff --git a/add-patch.c b/add-patch.c
new file mode 100644
index 0000000000..2c46fe5b33
--- /dev/null
+++ b/add-patch.c
@@ -0,0 +1,1338 @@
+#include "cache.h"
+#include "add-interactive.h"
+#include "strbuf.h"
+#include "run-command.h"
+#include "argv-array.h"
+#include "pathspec.h"
+#include "color.h"
+#include "diff.h"
+
+enum prompt_mode_type {
+ PROMPT_MODE_CHANGE = 0, PROMPT_DELETION, PROMPT_HUNK
+};
+
+static const char *prompt_mode[] = {
+ N_("Stage mode change [y,n,a,q,d%s,?]? "),
+ N_("Stage deletion [y,n,a,q,d%s,?]? "),
+ N_("Stage this hunk [y,n,a,q,d%s,?]? ")
+};
+
+struct hunk_header {
+ unsigned long old_offset, old_count, new_offset, new_count;
+ /*
+ * Start/end offsets to the extra text after the second `@@` in the
+ * hunk header, e.g. the function signature. This is expected to
+ * include the newline.
+ */
+ size_t extra_start, extra_end, colored_extra_start, colored_extra_end;
+};
+
+struct hunk {
+ size_t start, end, colored_start, colored_end, splittable_into;
+ ssize_t delta;
+ enum { UNDECIDED_HUNK = 0, SKIP_HUNK, USE_HUNK } use;
+ struct hunk_header header;
+};
+
+struct add_p_state {
+ struct add_i_state s;
+ struct strbuf answer, buf;
+
+ /* parsed diff */
+ struct strbuf plain, colored;
+ struct file_diff {
+ struct hunk head;
+ struct hunk *hunk;
+ size_t hunk_nr, hunk_alloc;
+ unsigned deleted:1, mode_change:1,binary:1;
+ } *file_diff;
+ size_t file_diff_nr;
+};
+
+static void err(struct add_p_state *s, const char *fmt, ...)
+{
+ va_list args;
+
+ va_start(args, fmt);
+ fputs(s->s.error_color, stderr);
+ vfprintf(stderr, fmt, args);
+ fputs(s->s.reset_color, stderr);
+ fputc('\n', stderr);
+ va_end(args);
+}
+
+static void setup_child_process(struct add_p_state *s,
+ struct child_process *cp, ...)
+{
+ va_list ap;
+ const char *arg;
+
+ va_start(ap, cp);
+ while ((arg = va_arg(ap, const char *)))
+ argv_array_push(&cp->args, arg);
+ va_end(ap);
+
+ cp->git_cmd = 1;
+ argv_array_pushf(&cp->env_array,
+ INDEX_ENVIRONMENT "=%s", s->s.r->index_file);
+}
+
+static int parse_range(const char **p,
+ unsigned long *offset, unsigned long *count)
+{
+ char *pend;
+
+ *offset = strtoul(*p, &pend, 10);
+ if (pend == *p)
+ return -1;
+ if (*pend != ',') {
+ *count = 1;
+ *p = pend;
+ return 0;
+ }
+ *count = strtoul(pend + 1, (char **)p, 10);
+ return *p == pend + 1 ? -1 : 0;
+}
+
+static int parse_hunk_header(struct add_p_state *s, struct hunk *hunk)
+{
+ struct hunk_header *header = &hunk->header;
+ const char *line = s->plain.buf + hunk->start, *p = line;
+ char *eol = memchr(p, '\n', s->plain.len - hunk->start);
+
+ if (!eol)
+ eol = s->plain.buf + s->plain.len;
+
+ if (!skip_prefix(p, "@@ -", &p) ||
+ parse_range(&p, &header->old_offset, &header->old_count) < 0 ||
+ !skip_prefix(p, " +", &p) ||
+ parse_range(&p, &header->new_offset, &header->new_count) < 0 ||
+ !skip_prefix(p, " @@", &p))
+ return error(_("could not parse hunk header '%.*s'"),
+ (int)(eol - line), line);
+
+ hunk->start = eol - s->plain.buf + (*eol == '\n');
+ header->extra_start = p - s->plain.buf;
+ header->extra_end = hunk->start;
+
+ if (!s->colored.len) {
+ header->colored_extra_start = header->colored_extra_end = 0;
+ return 0;
+ }
+
+ /* Now find the extra text in the colored diff */
+ line = s->colored.buf + hunk->colored_start;
+ eol = memchr(line, '\n', s->colored.len - hunk->colored_start);
+ if (!eol)
+ eol = s->colored.buf + s->colored.len;
+ p = memmem(line, eol - line, "@@ -", 4);
+ if (!p)
+ return error(_("could not parse colored hunk header '%.*s'"),
+ (int)(eol - line), line);
+ p = memmem(p + 4, eol - p - 4, " @@", 3);
+ if (!p)
+ return error(_("could not parse colored hunk header '%.*s'"),
+ (int)(eol - line), line);
+ hunk->colored_start = eol - s->colored.buf + (*eol == '\n');
+ header->colored_extra_start = p + 3 - s->colored.buf;
+ header->colored_extra_end = hunk->colored_start;
+
+ return 0;
+}
+
+static int is_octal(const char *p, size_t len)
+{
+ if (!len)
+ return 0;
+
+ while (len--)
+ if (*p < '0' || *(p++) > '7')
+ return 0;
+ return 1;
+}
+
+static int parse_diff(struct add_p_state *s, const struct pathspec *ps)
+{
+ struct argv_array args = ARGV_ARRAY_INIT;
+ struct strbuf *plain = &s->plain, *colored = NULL;
+ struct child_process cp = CHILD_PROCESS_INIT;
+ char *p, *pend, *colored_p = NULL, *colored_pend = NULL, marker = '\0';
+ size_t file_diff_alloc = 0, i, color_arg_index;
+ struct file_diff *file_diff = NULL;
+ struct hunk *hunk = NULL;
+ int res;
+
+ /* Use `--no-color` explicitly, just in case `diff.color = always`. */
+ argv_array_pushl(&args, "diff-files", "-p", "--no-color", "--", NULL);
+ color_arg_index = args.argc - 2;
+ for (i = 0; i < ps->nr; i++)
+ argv_array_push(&args, ps->items[i].original);
+
+ setup_child_process(s, &cp, NULL);
+ cp.argv = args.argv;
+ res = capture_command(&cp, plain, 0);
+ if (res) {
+ argv_array_clear(&args);
+ return error(_("could not parse diff"));
+ }
+ if (!plain->len) {
+ argv_array_clear(&args);
+ return 0;
+ }
+ strbuf_complete_line(plain);
+
+ if (want_color_fd(1, -1)) {
+ struct child_process colored_cp = CHILD_PROCESS_INIT;
+
+ setup_child_process(s, &colored_cp, NULL);
+ xsnprintf((char *)args.argv[color_arg_index], 8, "--color");
+ colored_cp.argv = args.argv;
+ colored = &s->colored;
+ res = capture_command(&colored_cp, colored, 0);
+ argv_array_clear(&args);
+ if (res)
+ return error(_("could not parse colored diff"));
+ strbuf_complete_line(colored);
+ colored_p = colored->buf;
+ colored_pend = colored_p + colored->len;
+ }
+ argv_array_clear(&args);
+
+ /* parse files and hunks */
+ p = plain->buf;
+ pend = p + plain->len;
+ while (p != pend) {
+ char *eol = memchr(p, '\n', pend - p);
+ const char *deleted = NULL, *mode_change = NULL;
+
+ if (!eol)
+ eol = pend;
+
+ if (starts_with(p, "diff ")) {
+ s->file_diff_nr++;
+ ALLOC_GROW(s->file_diff, s->file_diff_nr,
+ file_diff_alloc);
+ file_diff = s->file_diff + s->file_diff_nr - 1;
+ memset(file_diff, 0, sizeof(*file_diff));
+ hunk = &file_diff->head;
+ hunk->start = p - plain->buf;
+ if (colored_p)
+ hunk->colored_start = colored_p - colored->buf;
+ marker = '\0';
+ } else if (p == plain->buf)
+ BUG("diff starts with unexpected line:\n"
+ "%.*s\n", (int)(eol - p), p);
+ else if (file_diff->deleted)
+ ; /* keep the rest of the file in a single "hunk" */
+ else if (starts_with(p, "@@ ") ||
+ (hunk == &file_diff->head &&
+ skip_prefix(p, "deleted file", &deleted))) {
+ if (marker == '-' || marker == '+')
+ /*
+ * Should not happen; previous hunk did not end
+ * in a context line? Handle it anyway.
+ */
+ hunk->splittable_into++;
+
+ file_diff->hunk_nr++;
+ ALLOC_GROW(file_diff->hunk, file_diff->hunk_nr,
+ file_diff->hunk_alloc);
+ hunk = file_diff->hunk + file_diff->hunk_nr - 1;
+ memset(hunk, 0, sizeof(*hunk));
+
+ hunk->start = p - plain->buf;
+ if (colored)
+ hunk->colored_start = colored_p - colored->buf;
+
+ if (deleted)
+ file_diff->deleted = 1;
+ else if (parse_hunk_header(s, hunk) < 0)
+ return -1;
+
+ /*
+ * Start counting into how many hunks this one can be
+ * split
+ */
+ marker = *p;
+ } else if (hunk == &file_diff->head &&
+ skip_prefix(p, "old mode ", &mode_change) &&
+ is_octal(mode_change, eol - mode_change)) {
+ if (file_diff->mode_change)
+ BUG("double mode change?\n\n%.*s",
+ (int)(eol - plain->buf), plain->buf);
+ if (file_diff->hunk_nr++)
+ BUG("mode change in the middle?\n\n%.*s",
+ (int)(eol - plain->buf), plain->buf);
+
+ /*
+ * Do *not* change `hunk`: the mode change pseudo-hunk
+ * is _part of_ the header "hunk".
+ */
+ file_diff->mode_change = 1;
+ ALLOC_GROW(file_diff->hunk, file_diff->hunk_nr,
+ file_diff->hunk_alloc);
+ memset(file_diff->hunk, 0, sizeof(struct hunk));
+ file_diff->hunk->start = p - plain->buf;
+ if (colored_p)
+ file_diff->hunk->colored_start =
+ colored_p - colored->buf;
+ } else if (hunk == &file_diff->head &&
+ skip_prefix(p, "new mode ", &mode_change) &&
+ is_octal(mode_change, eol - mode_change)) {
+
+ /*
+ * Extend the "mode change" pseudo-hunk to include also
+ * the "new mode" line.
+ */
+ if (!file_diff->mode_change)
+ BUG("'new mode' without 'old mode'?\n\n%.*s",
+ (int)(eol - plain->buf), plain->buf);
+ if (file_diff->hunk_nr != 1)
+ BUG("mode change in the middle?\n\n%.*s",
+ (int)(eol - plain->buf), plain->buf);
+ if (p - plain->buf != file_diff->hunk->end)
+ BUG("'new mode' does not immediately follow "
+ "'old mode'?\n\n%.*s",
+ (int)(eol - plain->buf), plain->buf);
+ } else if (hunk == &file_diff->head &&
+ starts_with(p, "Binary files "))
+ file_diff->binary = 1;
+
+ if (file_diff->deleted && file_diff->mode_change)
+ BUG("diff contains delete *and* a mode change?!?\n%.*s",
+ (int)(eol - (plain->buf + file_diff->head.start)),
+ plain->buf + file_diff->head.start);
+
+ if ((marker == '-' || marker == '+') && *p == ' ')
+ hunk->splittable_into++;
+ if (marker && *p != '\\')
+ marker = *p;
+
+ p = eol == pend ? pend : eol + 1;
+ hunk->end = p - plain->buf;
+
+ if (colored) {
+ char *colored_eol = memchr(colored_p, '\n',
+ colored_pend - colored_p);
+ if (colored_eol)
+ colored_p = colored_eol + 1;
+ else
+ colored_p = colored_pend;
+
+ hunk->colored_end = colored_p - colored->buf;
+ }
+
+ if (mode_change) {
+ if (file_diff->hunk_nr != 1)
+ BUG("mode change in hunk #%d???",
+ (int)file_diff->hunk_nr);
+ /* Adjust the end of the "mode change" pseudo-hunk */
+ file_diff->hunk->end = hunk->end;
+ if (colored)
+ file_diff->hunk->colored_end = hunk->colored_end;
+ }
+ }
+
+ if (marker == '-' || marker == '+')
+ /*
+ * Last hunk ended in non-context line (i.e. it appended lines
+ * to the file, so there are no trailing context lines).
+ */
+ hunk->splittable_into++;
+
+ return 0;
+}
+
+static size_t find_next_line(struct strbuf *sb, size_t offset)
+{
+ char *eol;
+
+ if (offset >= sb->len)
+ BUG("looking for next line beyond buffer (%d >= %d)\n%s",
+ (int)offset, (int)sb->len, sb->buf);
+
+ eol = memchr(sb->buf + offset, '\n', sb->len - offset);
+ if (!eol)
+ return sb->len;
+ return eol - sb->buf + 1;
+}
+
+static void render_hunk(struct add_p_state *s, struct hunk *hunk,
+ ssize_t delta, int colored, struct strbuf *out)
+{
+ struct hunk_header *header = &hunk->header;
+
+ if (hunk->header.old_offset != 0 || hunk->header.new_offset != 0) {
+ /*
+ * Generate the hunk header dynamically, except for special
+ * hunks (such as the diff header).
+ */
+ const char *p;
+ size_t len;
+ unsigned long old_offset = header->old_offset;
+ unsigned long new_offset = header->new_offset;
+
+ if (!colored) {
+ p = s->plain.buf + header->extra_start;
+ len = header->extra_end - header->extra_start;
+ } else {
+ strbuf_addstr(out, s->s.fraginfo_color);
+ p = s->colored.buf + header->colored_extra_start;
+ len = header->colored_extra_end
+ - header->colored_extra_start;
+ }
+
+ new_offset += delta;
+
+ strbuf_addf(out, "@@ -%lu,%lu +%lu,%lu @@",
+ old_offset, header->old_count,
+ new_offset, header->new_count);
+ if (len)
+ strbuf_add(out, p, len);
+ else if (colored)
+ strbuf_addf(out, "%s\n", GIT_COLOR_RESET);
+ else
+ strbuf_addch(out, '\n');
+ }
+
+ if (colored)
+ strbuf_add(out, s->colored.buf + hunk->colored_start,
+ hunk->colored_end - hunk->colored_start);
+ else
+ strbuf_add(out, s->plain.buf + hunk->start,
+ hunk->end - hunk->start);
+}
+
+static void render_diff_header(struct add_p_state *s,
+ struct file_diff *file_diff, int colored,
+ struct strbuf *out)
+{
+ /*
+ * If there was a mode change, the first hunk is a pseudo hunk that
+ * corresponds to the mode line in the header. If the user did not want
+ * to stage that "hunk", we actually have to cut it out from the header.
+ */
+ int skip_mode_change =
+ file_diff->mode_change && file_diff->hunk->use != USE_HUNK;
+ struct hunk *head = &file_diff->head, *first = file_diff->hunk;
+
+ if (!skip_mode_change) {
+ render_hunk(s, head, 0, colored, out);
+ return;
+ }
+
+ if (colored) {
+ const char *p = s->colored.buf;
+
+ strbuf_add(out, p + head->colored_start,
+ first->colored_start - head->colored_start);
+ strbuf_add(out, p + first->colored_end,
+ head->colored_end - first->colored_end);
+ } else {
+ const char *p = s->plain.buf;
+
+ strbuf_add(out, p + head->start, first->start - head->start);
+ strbuf_add(out, p + first->end, head->end - first->end);
+ }
+}
+
+/* Coalesce hunks again that were split */
+static int merge_hunks(struct add_p_state *s, struct file_diff *file_diff,
+ size_t *hunk_index, int use_all, struct hunk *merged)
+{
+ size_t i = *hunk_index, delta;
+ struct hunk *hunk = file_diff->hunk + i;
+ /* `header` corresponds to the merged hunk */
+ struct hunk_header *header = &merged->header, *next;
+
+ if (!use_all && hunk->use != USE_HUNK)
+ return 0;
+
+ *merged = *hunk;
+ /* We simply skip the colored part (if any) when merging hunks */
+ merged->colored_start = merged->colored_end = 0;
+
+ for (; i + 1 < file_diff->hunk_nr; i++) {
+ hunk++;
+ next = &hunk->header;
+
+ /*
+ * Stop merging hunks when:
+ *
+ * - the hunk is not selected for use, or
+ * - the hunk does not overlap with the already-merged hunk(s)
+ */
+ if ((!use_all && hunk->use != USE_HUNK) ||
+ header->new_offset >= next->new_offset + merged->delta ||
+ header->new_offset + header->new_count
+ < next->new_offset + merged->delta)
+ break;
+
+ /*
+ * If the hunks were not edited, and overlap, we can simply
+ * extend the line range.
+ */
+ if (merged->start < hunk->start && merged->end > hunk->start) {
+ merged->end = hunk->end;
+ merged->colored_end = hunk->colored_end;
+ delta = 0;
+ } else {
+ const char *plain = s->plain.buf;
+ size_t overlapping_line_count = header->new_offset
+ + header->new_count - merged->delta
+ - next->new_offset;
+ size_t overlap_end = hunk->start;
+ size_t overlap_start = overlap_end;
+ size_t overlap_next, len, j;
+
+ /*
+ * One of the hunks was edited: the modified hunk was
+ * appended to the strbuf `s->plain`.
+ *
+ * Let's ensure that at least the last context line of
+ * the first hunk overlaps with the corresponding line
+ * of the second hunk, and then merge.
+ */
+ for (j = 0; j < overlapping_line_count; j++) {
+ overlap_next = find_next_line(&s->plain,
+ overlap_end);
+
+ if (overlap_next > hunk->end)
+ BUG("failed to find %d context lines "
+ "in:\n%.*s",
+ (int)overlapping_line_count,
+ (int)(hunk->end - hunk->start),
+ plain + hunk->start);
+
+ if (plain[overlap_end] != ' ')
+ return error(_("expected context line "
+ "#%d in\n%.*s"),
+ (int)(j + 1),
+ (int)(hunk->end
+ - hunk->start),
+ plain + hunk->start);
+
+ overlap_start = overlap_end;
+ overlap_end = overlap_next;
+ }
+ len = overlap_end - overlap_start;
+
+ if (len > merged->end - merged->start ||
+ memcmp(plain + merged->end - len,
+ plain + overlap_start, len))
+ return error(_("hunks do not overlap:\n%.*s\n"
+ "\tdoes not end with:\n%.*s"),
+ (int)(merged->end - merged->start),
+ plain + merged->start,
+ (int)len, plain + overlap_start);
+
+ /*
+ * Since the start-end ranges are not adjacent, we
+ * cannot simply take the union of the ranges. To
+ * address that, we temporarily append the union of the
+ * lines to the `plain` strbuf.
+ */
+ if (merged->end != s->plain.len) {
+ size_t start = s->plain.len;
+
+ strbuf_add(&s->plain, plain + merged->start,
+ merged->end - merged->start);
+ plain = s->plain.buf;
+ merged->start = start;
+ merged->end = s->plain.len;
+ }
+
+ strbuf_add(&s->plain,
+ plain + overlap_end,
+ hunk->end - overlap_end);
+ merged->end = s->plain.len;
+ merged->splittable_into += hunk->splittable_into;
+ delta = merged->delta;
+ merged->delta += hunk->delta;
+ }
+
+ header->old_count = next->old_offset + next->old_count
+ - header->old_offset;
+ header->new_count = next->new_offset + delta
+ + next->new_count - header->new_offset;
+ }
+
+ if (i == *hunk_index)
+ return 0;
+
+ *hunk_index = i;
+ return 1;
+}
+
+static void reassemble_patch(struct add_p_state *s,
+ struct file_diff *file_diff, int use_all,
+ struct strbuf *out)
+{
+ struct hunk *hunk;
+ size_t save_len = s->plain.len, i;
+ ssize_t delta = 0;
+
+ render_diff_header(s, file_diff, 0, out);
+
+ for (i = file_diff->mode_change; i < file_diff->hunk_nr; i++) {
+ struct hunk merged = { 0 };
+
+ hunk = file_diff->hunk + i;
+ if (!use_all && hunk->use != USE_HUNK)
+ delta += hunk->header.old_count
+ - hunk->header.new_count;
+ else {
+ /* merge overlapping hunks into a temporary hunk */
+ if (merge_hunks(s, file_diff, &i, use_all, &merged))
+ hunk = &merged;
+
+ render_hunk(s, hunk, delta, 0, out);
+
+ /*
+ * In case `merge_hunks()` used `plain` as a scratch
+ * pad (this happens when an edited hunk had to be
+ * coalesced with another hunk).
+ */
+ strbuf_setlen(&s->plain, save_len);
+
+ delta += hunk->delta;
+ }
+ }
+}
+
+static int split_hunk(struct add_p_state *s, struct file_diff *file_diff,
+ size_t hunk_index)
+{
+ int colored = !!s->colored.len, first = 1;
+ struct hunk *hunk = file_diff->hunk + hunk_index;
+ size_t splittable_into;
+ size_t end, colored_end, current, colored_current = 0, context_line_count;
+ struct hunk_header remaining, *header;
+ char marker, ch;
+
+ if (hunk_index >= file_diff->hunk_nr)
+ BUG("invalid hunk index: %d (must be >= 0 and < %d)",
+ (int)hunk_index, (int)file_diff->hunk_nr);
+
+ if (hunk->splittable_into < 2)
+ return 0;
+ splittable_into = hunk->splittable_into;
+
+ end = hunk->end;
+ colored_end = hunk->colored_end;
+
+ remaining = hunk->header;
+
+ file_diff->hunk_nr += splittable_into - 1;
+ ALLOC_GROW(file_diff->hunk, file_diff->hunk_nr, file_diff->hunk_alloc);
+ if (hunk_index + splittable_into < file_diff->hunk_nr)
+ memmove(file_diff->hunk + hunk_index + splittable_into,
+ file_diff->hunk + hunk_index + 1,
+ (file_diff->hunk_nr - hunk_index - splittable_into)
+ * sizeof(*hunk));
+ hunk = file_diff->hunk + hunk_index;
+ hunk->splittable_into = 1;
+ memset(hunk + 1, 0, (splittable_into - 1) * sizeof(*hunk));
+
+ header = &hunk->header;
+ header->old_count = header->new_count = 0;
+
+ current = hunk->start;
+ if (colored)
+ colored_current = hunk->colored_start;
+ marker = '\0';
+ context_line_count = 0;
+
+ while (splittable_into > 1) {
+ ch = s->plain.buf[current];
+
+ if (!ch)
+ BUG("buffer overrun while splitting hunks");
+
+ /*
+ * Is this the first context line after a chain of +/- lines?
+ * Then record the start of the next split hunk.
+ */
+ if ((marker == '-' || marker == '+') && ch == ' ') {
+ first = 0;
+ hunk[1].start = current;
+ if (colored)
+ hunk[1].colored_start = colored_current;
+ context_line_count = 0;
+ }
+
+ /*
+ * Was the previous line a +/- one? Alternatively, is this the
+ * first line (and not a +/- one)?
+ *
+ * Then just increment the appropriate counter and continue
+ * with the next line.
+ */
+ if (marker != ' ' || (ch != '-' && ch != '+')) {
+next_hunk_line:
+ /* Comment lines are attached to the previous line */
+ if (ch == '\\')
+ ch = marker ? marker : ' ';
+
+ /* current hunk not done yet */
+ if (ch == ' ')
+ context_line_count++;
+ else if (ch == '-')
+ header->old_count++;
+ else if (ch == '+')
+ header->new_count++;
+ else
+ BUG("unhandled diff marker: '%c'", ch);
+ marker = ch;
+ current = find_next_line(&s->plain, current);
+ if (colored)
+ colored_current =
+ find_next_line(&s->colored,
+ colored_current);
+ continue;
+ }
+
+ /*
+ * We got us the start of a new hunk!
+ *
+ * This is a context line, so it is shared with the previous
+ * hunk, if any.
+ */
+
+ if (first) {
+ if (header->old_count || header->new_count)
+ BUG("counts are off: %d/%d",
+ (int)header->old_count,
+ (int)header->new_count);
+
+ header->old_count = context_line_count;
+ header->new_count = context_line_count;
+ context_line_count = 0;
+ first = 0;
+ goto next_hunk_line;
+ }
+
+ remaining.old_offset += header->old_count;
+ remaining.old_count -= header->old_count;
+ remaining.new_offset += header->new_count;
+ remaining.new_count -= header->new_count;
+
+ /* initialize next hunk header's offsets */
+ hunk[1].header.old_offset =
+ header->old_offset + header->old_count;
+ hunk[1].header.new_offset =
+ header->new_offset + header->new_count;
+
+ /* add one split hunk */
+ header->old_count += context_line_count;
+ header->new_count += context_line_count;
+
+ hunk->end = current;
+ if (colored)
+ hunk->colored_end = colored_current;
+
+ hunk++;
+ hunk->splittable_into = 1;
+ hunk->use = hunk[-1].use;
+ header = &hunk->header;
+
+ header->old_count = header->new_count = context_line_count;
+ context_line_count = 0;
+
+ splittable_into--;
+ marker = ch;
+ }
+
+ /* last hunk simply gets the rest */
+ if (header->old_offset != remaining.old_offset)
+ BUG("miscounted old_offset: %lu != %lu",
+ header->old_offset, remaining.old_offset);
+ if (header->new_offset != remaining.new_offset)
+ BUG("miscounted new_offset: %lu != %lu",
+ header->new_offset, remaining.new_offset);
+ header->old_count = remaining.old_count;
+ header->new_count = remaining.new_count;
+ hunk->end = end;
+ if (colored)
+ hunk->colored_end = colored_end;
+
+ return 0;
+}
+
+static void recolor_hunk(struct add_p_state *s, struct hunk *hunk)
+{
+ const char *plain = s->plain.buf;
+ size_t current, eol, next;
+
+ if (!s->colored.len)
+ return;
+
+ hunk->colored_start = s->colored.len;
+ for (current = hunk->start; current < hunk->end; ) {
+ for (eol = current; eol < hunk->end; eol++)
+ if (plain[eol] == '\n')
+ break;
+ next = eol + (eol < hunk->end);
+ if (eol > current && plain[eol - 1] == '\r')
+ eol--;
+
+ strbuf_addstr(&s->colored,
+ plain[current] == '-' ?
+ s->s.file_old_color :
+ plain[current] == '+' ?
+ s->s.file_new_color :
+ s->s.context_color);
+ strbuf_add(&s->colored, plain + current, eol - current);
+ strbuf_addstr(&s->colored, GIT_COLOR_RESET);
+ if (next > eol)
+ strbuf_add(&s->colored, plain + eol, next - eol);
+ current = next;
+ }
+ hunk->colored_end = s->colored.len;
+}
+
+static int edit_hunk_manually(struct add_p_state *s, struct hunk *hunk)
+{
+ size_t i;
+
+ strbuf_reset(&s->buf);
+ strbuf_commented_addf(&s->buf, _("Manual hunk edit mode -- see bottom for "
+ "a quick guide.\n"));
+ render_hunk(s, hunk, 0, 0, &s->buf);
+ strbuf_commented_addf(&s->buf,
+ _("---\n"
+ "To remove '%c' lines, make them ' ' lines "
+ "(context).\n"
+ "To remove '%c' lines, delete them.\n"
+ "Lines starting with %c will be removed.\n"),
+ '-', '+', comment_line_char);
+ strbuf_commented_addf(&s->buf,
+ _("If the patch applies cleanly, the edited hunk "
+ "will immediately be\n"
+ "marked for staging.\n"));
+ /*
+ * TRANSLATORS: 'it' refers to the patch mentioned in the previous
+ * messages.
+ */
+ strbuf_commented_addf(&s->buf,
+ _("If it does not apply cleanly, you will be "
+ "given an opportunity to\n"
+ "edit again. If all lines of the hunk are "
+ "removed, then the edit is\n"
+ "aborted and the hunk is left unchanged.\n"));
+
+ if (strbuf_edit_interactively(&s->buf, "addp-hunk-edit.diff", NULL) < 0)
+ return -1;
+
+ /* strip out commented lines */
+ hunk->start = s->plain.len;
+ for (i = 0; i < s->buf.len; ) {
+ size_t next = find_next_line(&s->buf, i);
+
+ if (s->buf.buf[i] != comment_line_char)
+ strbuf_add(&s->plain, s->buf.buf + i, next - i);
+ i = next;
+ }
+
+ hunk->end = s->plain.len;
+ if (hunk->end == hunk->start)
+ /* The user aborted editing by deleting everything */
+ return 0;
+
+ recolor_hunk(s, hunk);
+
+ /*
+ * If the hunk header is intact, parse it, otherwise simply use the
+ * hunk header prior to editing (which will adjust `hunk->start` to
+ * skip the hunk header).
+ */
+ if (s->plain.buf[hunk->start] == '@' &&
+ parse_hunk_header(s, hunk) < 0)
+ return error(_("could not parse hunk header"));
+
+ return 1;
+}
+
+static ssize_t recount_edited_hunk(struct add_p_state *s, struct hunk *hunk,
+ size_t orig_old_count, size_t orig_new_count)
+{
+ struct hunk_header *header = &hunk->header;
+ size_t i;
+
+ header->old_count = header->new_count = 0;
+ for (i = hunk->start; i < hunk->end; ) {
+ switch (s->plain.buf[i]) {
+ case '-':
+ header->old_count++;
+ break;
+ case '+':
+ header->new_count++;
+ break;
+ case ' ': case '\r': case '\n':
+ header->old_count++;
+ header->new_count++;
+ break;
+ }
+
+ i = find_next_line(&s->plain, i);
+ }
+
+ return orig_old_count - orig_new_count
+ - header->old_count + header->new_count;
+}
+
+static int run_apply_check(struct add_p_state *s,
+ struct file_diff *file_diff)
+{
+ struct child_process cp = CHILD_PROCESS_INIT;
+
+ strbuf_reset(&s->buf);
+ reassemble_patch(s, file_diff, 1, &s->buf);
+
+ setup_child_process(s, &cp,
+ "apply", "--cached", "--check", NULL);
+ if (pipe_command(&cp, s->buf.buf, s->buf.len, NULL, 0, NULL, 0))
+ return error(_("'git apply --cached' failed"));
+
+ return 0;
+}
+
+static int prompt_yesno(struct add_p_state *s, const char *prompt)
+{
+ for (;;) {
+ color_fprintf(stdout, s->s.prompt_color, "%s", _(prompt));
+ fflush(stdout);
+ if (strbuf_getline(&s->answer, stdin) == EOF)
+ return -1;
+ strbuf_trim_trailing_newline(&s->answer);
+ switch (tolower(s->answer.buf[0])) {
+ case 'n': return 0;
+ case 'y': return 1;
+ }
+ }
+}
+
+static int edit_hunk_loop(struct add_p_state *s,
+ struct file_diff *file_diff, struct hunk *hunk)
+{
+ size_t plain_len = s->plain.len, colored_len = s->colored.len;
+ struct hunk backup;
+
+ backup = *hunk;
+
+ for (;;) {
+ int res = edit_hunk_manually(s, hunk);
+ if (res == 0) {
+ /* abandonded */
+ *hunk = backup;
+ return -1;
+ }
+
+ if (res > 0) {
+ hunk->delta +=
+ recount_edited_hunk(s, hunk,
+ backup.header.old_count,
+ backup.header.new_count);
+ if (!run_apply_check(s, file_diff))
+ return 0;
+ }
+
+ /* Drop edits (they were appended to s->plain) */
+ strbuf_setlen(&s->plain, plain_len);
+ strbuf_setlen(&s->colored, colored_len);
+ *hunk = backup;
+
+ /*
+ * TRANSLATORS: do not translate [y/n]
+ * The program will only accept that input at this point.
+ * Consider translating (saying "no" discards!) as
+ * (saying "n" for "no" discards!) if the translation
+ * of the word "no" does not start with n.
+ */
+ res = prompt_yesno(s, _("Your edited hunk does not apply. "
+ "Edit again (saying \"no\" discards!) "
+ "[y/n]? "));
+ if (res < 1)
+ return -1;
+ }
+}
+
+#define SUMMARY_HEADER_WIDTH 20
+#define SUMMARY_LINE_WIDTH 80
+static void summarize_hunk(struct add_p_state *s, struct hunk *hunk,
+ struct strbuf *out)
+{
+ struct hunk_header *header = &hunk->header;
+ struct strbuf *plain = &s->plain;
+ size_t len = out->len, i;
+
+ strbuf_addf(out, " -%lu,%lu +%lu,%lu ",
+ header->old_offset, header->old_count,
+ header->new_offset, header->new_count);
+ if (out->len - len < SUMMARY_HEADER_WIDTH)
+ strbuf_addchars(out, ' ',
+ SUMMARY_HEADER_WIDTH + len - out->len);
+ for (i = hunk->start; i < hunk->end; i = find_next_line(plain, i))
+ if (plain->buf[i] != ' ')
+ break;
+ if (i < hunk->end)
+ strbuf_add(out, plain->buf + i, find_next_line(plain, i) - i);
+ if (out->len - len > SUMMARY_LINE_WIDTH)
+ strbuf_setlen(out, len + SUMMARY_LINE_WIDTH);
+ strbuf_complete_line(out);
+}
+
+#define DISPLAY_HUNKS_LINES 20
+static size_t display_hunks(struct add_p_state *s,
+ struct file_diff *file_diff, size_t start_index)
+{
+ size_t end_index = start_index + DISPLAY_HUNKS_LINES;
+
+ if (end_index > file_diff->hunk_nr)
+ end_index = file_diff->hunk_nr;
+
+ while (start_index < end_index) {
+ struct hunk *hunk = file_diff->hunk + start_index++;
+
+ strbuf_reset(&s->buf);
+ strbuf_addf(&s->buf, "%c%2d: ", hunk->use == USE_HUNK ? '+'
+ : hunk->use == SKIP_HUNK ? '-' : ' ',
+ (int)start_index);
+ summarize_hunk(s, hunk, &s->buf);
+ fputs(s->buf.buf, stdout);
+ }
+
+ return end_index;
+}
+
+static const char help_patch_text[] =
+N_("y - stage this hunk\n"
+ "n - do not stage this hunk\n"
+ "q - quit; do not stage this hunk or any of the remaining ones\n"
+ "a - stage this and all the remaining hunks\n"
+ "d - do not stage this hunk nor any of the remaining hunks\n");
+
+static const char help_patch_remainder[] =
+N_("j - leave this hunk undecided, see next undecided hunk\n"
+ "J - leave this hunk undecided, see next hunk\n"
+ "k - leave this hunk undecided, see previous undecided hunk\n"
+ "K - leave this hunk undecided, see previous hunk\n"
+ "g - select a hunk to go to\n"
+ "/ - search for a hunk matching the given regex\n"
+ "s - split the current hunk into smaller hunks\n"
+ "e - manually edit the current hunk\n"
+ "? - print help\n");
+
+static int patch_update_file(struct add_p_state *s,
+ struct file_diff *file_diff)
+{
+ size_t hunk_index = 0;
+ ssize_t i, undecided_previous, undecided_next;
+ struct hunk *hunk;
+ char ch;
+ struct child_process cp = CHILD_PROCESS_INIT;
+ int colored = !!s->colored.len, quit = 0;
+ enum prompt_mode_type prompt_mode_type;
+
+ if (!file_diff->hunk_nr)
+ return 0;
+
+ strbuf_reset(&s->buf);
+ render_diff_header(s, file_diff, colored, &s->buf);
+ fputs(s->buf.buf, stdout);
+ for (;;) {
+ if (hunk_index >= file_diff->hunk_nr)
+ hunk_index = 0;
+ hunk = file_diff->hunk + hunk_index;
+
+ undecided_previous = -1;
+ for (i = hunk_index - 1; i >= 0; i--)
+ if (file_diff->hunk[i].use == UNDECIDED_HUNK) {
+ undecided_previous = i;
+ break;
+ }
+
+ undecided_next = -1;
+ for (i = hunk_index + 1; i < file_diff->hunk_nr; i++)
+ if (file_diff->hunk[i].use == UNDECIDED_HUNK) {
+ undecided_next = i;
+ break;
+ }
+
+ /* Everything decided? */
+ if (undecided_previous < 0 && undecided_next < 0 &&
+ hunk->use != UNDECIDED_HUNK)
+ break;
+
+ strbuf_reset(&s->buf);
+ render_hunk(s, hunk, 0, colored, &s->buf);
+ fputs(s->buf.buf, stdout);
+
+ strbuf_reset(&s->buf);
+ if (undecided_previous >= 0)
+ strbuf_addstr(&s->buf, ",k");
+ if (hunk_index)
+ strbuf_addstr(&s->buf, ",K");
+ if (undecided_next >= 0)
+ strbuf_addstr(&s->buf, ",j");
+ if (hunk_index + 1 < file_diff->hunk_nr)
+ strbuf_addstr(&s->buf, ",J");
+ if (file_diff->hunk_nr > 1)
+ strbuf_addstr(&s->buf, ",g,/");
+ if (hunk->splittable_into > 1)
+ strbuf_addstr(&s->buf, ",s");
+ if (hunk_index + 1 > file_diff->mode_change &&
+ !file_diff->deleted)
+ strbuf_addstr(&s->buf, ",e");
+
+ if (file_diff->deleted)
+ prompt_mode_type = PROMPT_DELETION;
+ else if (file_diff->mode_change && !hunk_index)
+ prompt_mode_type = PROMPT_MODE_CHANGE;
+ else
+ prompt_mode_type = PROMPT_HUNK;
+
+ color_fprintf(stdout, s->s.prompt_color,
+ "(%"PRIuMAX"/%"PRIuMAX") ",
+ (uintmax_t)hunk_index + 1,
+ (uintmax_t)file_diff->hunk_nr);
+ color_fprintf(stdout, s->s.prompt_color,
+ _(prompt_mode[prompt_mode_type]), s->buf.buf);
+ fflush(stdout);
+ if (strbuf_getline(&s->answer, stdin) == EOF)
+ break;
+ strbuf_trim_trailing_newline(&s->answer);
+
+ if (!s->answer.len)
+ continue;
+ ch = tolower(s->answer.buf[0]);
+ if (ch == 'y') {
+ hunk->use = USE_HUNK;
+soft_increment:
+ hunk_index = undecided_next < 0 ?
+ file_diff->hunk_nr : undecided_next;
+ } else if (ch == 'n') {
+ hunk->use = SKIP_HUNK;
+ goto soft_increment;
+ } else if (ch == 'a') {
+ for (; hunk_index < file_diff->hunk_nr; hunk_index++) {
+ hunk = file_diff->hunk + hunk_index;
+ if (hunk->use == UNDECIDED_HUNK)
+ hunk->use = USE_HUNK;
+ }
+ } else if (ch == 'd' || ch == 'q') {
+ for (; hunk_index < file_diff->hunk_nr; hunk_index++) {
+ hunk = file_diff->hunk + hunk_index;
+ if (hunk->use == UNDECIDED_HUNK)
+ hunk->use = SKIP_HUNK;
+ }
+ if (ch == 'q') {
+ quit = 1;
+ break;
+ }
+ } else if (s->answer.buf[0] == 'K') {
+ if (hunk_index)
+ hunk_index--;
+ else
+ err(s, _("No previous hunk"));
+ } else if (s->answer.buf[0] == 'J') {
+ if (hunk_index + 1 < file_diff->hunk_nr)
+ hunk_index++;
+ else
+ err(s, _("No next hunk"));
+ } else if (s->answer.buf[0] == 'k') {
+ if (undecided_previous >= 0)
+ hunk_index = undecided_previous;
+ else
+ err(s, _("No previous hunk"));
+ } else if (s->answer.buf[0] == 'j') {
+ if (undecided_next >= 0)
+ hunk_index = undecided_next;
+ else
+ err(s, _("No next hunk"));
+ } else if (s->answer.buf[0] == 'g') {
+ char *pend;
+ unsigned long response;
+
+ if (file_diff->hunk_nr < 2) {
+ err(s, _("No other hunks to goto"));
+ continue;
+ }
+ strbuf_remove(&s->answer, 0, 1);
+ strbuf_trim(&s->answer);
+ i = hunk_index - DISPLAY_HUNKS_LINES / 2;
+ if (i < file_diff->mode_change)
+ i = file_diff->mode_change;
+ while (s->answer.len == 0) {
+ i = display_hunks(s, file_diff, i);
+ printf("%s", i < file_diff->hunk_nr ?
+ _("go to which hunk (<ret> to see "
+ "more)? ") : _("go to which hunk? "));
+ fflush(stdout);
+ if (strbuf_getline(&s->answer,
+ stdin) == EOF)
+ break;
+ strbuf_trim_trailing_newline(&s->answer);
+ }
+
+ strbuf_trim(&s->answer);
+ response = strtoul(s->answer.buf, &pend, 10);
+ if (*pend || pend == s->answer.buf)
+ err(s, _("Invalid number: '%s'"),
+ s->answer.buf);
+ else if (0 < response && response <= file_diff->hunk_nr)
+ hunk_index = response - 1;
+ else
+ err(s, Q_("Sorry, only %d hunk available.",
+ "Sorry, only %d hunks available.",
+ file_diff->hunk_nr),
+ (int)file_diff->hunk_nr);
+ } else if (s->answer.buf[0] == '/') {
+ regex_t regex;
+ int ret;
+
+ if (file_diff->hunk_nr < 2) {
+ err(s, _("No other hunks to search"));
+ continue;
+ }
+ strbuf_remove(&s->answer, 0, 1);
+ strbuf_trim_trailing_newline(&s->answer);
+ if (s->answer.len == 0) {
+ printf("%s", _("search for regex? "));
+ fflush(stdout);
+ if (strbuf_getline(&s->answer,
+ stdin) == EOF)
+ break;
+ strbuf_trim_trailing_newline(&s->answer);
+ if (s->answer.len == 0)
+ continue;
+ }
+ ret = regcomp(&regex, s->answer.buf,
+ REG_EXTENDED | REG_NOSUB | REG_NEWLINE);
+ if (ret) {
+ char errbuf[1024];
+
+ regerror(ret, &regex, errbuf, sizeof(errbuf));
+ err(s, _("Malformed search regexp %s: %s"),
+ s->answer.buf, errbuf);
+ continue;
+ }
+ i = hunk_index;
+ for (;;) {
+ /* render the hunk into a scratch buffer */
+ render_hunk(s, file_diff->hunk + i, 0, 0,
+ &s->buf);
+ if (regexec(&regex, s->buf.buf, 0, NULL, 0)
+ != REG_NOMATCH)
+ break;
+ i++;
+ if (i == file_diff->hunk_nr)
+ i = 0;
+ if (i != hunk_index)
+ continue;
+ err(s, _("No hunk matches the given pattern"));
+ break;
+ }
+ hunk_index = i;
+ } else if (s->answer.buf[0] == 's') {
+ size_t splittable_into = hunk->splittable_into;
+ if (splittable_into < 2)
+ err(s, _("Sorry, cannot split this hunk"));
+ else if (!split_hunk(s, file_diff,
+ hunk - file_diff->hunk))
+ color_fprintf_ln(stdout, s->s.header_color,
+ _("Split into %d hunks."),
+ (int)splittable_into);
+ } else if (s->answer.buf[0] == 'e') {
+ if (hunk_index + 1 == file_diff->mode_change)
+ err(s, _("Sorry, cannot edit this hunk"));
+ else if (edit_hunk_loop(s, file_diff, hunk) >= 0) {
+ hunk->use = USE_HUNK;
+ goto soft_increment;
+ }
+ } else {
+ const char *p = _(help_patch_remainder), *eol = p;
+
+ color_fprintf(stdout, s->s.help_color, "%s",
+ _(help_patch_text));
+
+ /*
+ * Show only those lines of the remainder that are
+ * actually applicable with the current hunk.
+ */
+ for (; *p; p = eol + (*eol == '\n')) {
+ eol = strchrnul(p, '\n');
+
+ /*
+ * `s->buf` still contains the part of the
+ * commands shown in the prompt that are not
+ * always available.
+ */
+ if (*p != '?' && !strchr(s->buf.buf, *p))
+ continue;
+
+ color_fprintf_ln(stdout, s->s.help_color,
+ "%.*s", (int)(eol - p), p);
+ }
+ }
+ }
+
+ /* Any hunk to be used? */
+ for (i = 0; i < file_diff->hunk_nr; i++)
+ if (file_diff->hunk[i].use == USE_HUNK)
+ break;
+
+ if (i < file_diff->hunk_nr) {
+ /* At least one hunk selected: apply */
+ strbuf_reset(&s->buf);
+ reassemble_patch(s, file_diff, 0, &s->buf);
+
+ discard_index(s->s.r->index);
+ setup_child_process(s, &cp, "apply", "--cached", NULL);
+ if (pipe_command(&cp, s->buf.buf, s->buf.len,
+ NULL, 0, NULL, 0))
+ error(_("'git apply --cached' failed"));
+ if (!repo_read_index(s->s.r))
+ repo_refresh_and_write_index(s->s.r, REFRESH_QUIET, 0,
+ 1, NULL, NULL, NULL);
+ }
+
+ putchar('\n');
+ return quit;
+}
+
+int run_add_p(struct repository *r, const struct pathspec *ps)
+{
+ struct add_p_state s = {
+ { r }, STRBUF_INIT, STRBUF_INIT, STRBUF_INIT, STRBUF_INIT
+ };
+ size_t i, binary_count = 0;
+
+ init_add_i_state(&s.s, r);
+
+ if (discard_index(r->index) < 0 || repo_read_index(r) < 0 ||
+ repo_refresh_and_write_index(r, REFRESH_QUIET, 0, 1,
+ NULL, NULL, NULL) < 0 ||
+ parse_diff(&s, ps) < 0) {
+ strbuf_release(&s.plain);
+ strbuf_release(&s.colored);
+ return -1;
+ }
+
+ for (i = 0; i < s.file_diff_nr; i++)
+ if (s.file_diff[i].binary && !s.file_diff[i].hunk_nr)
+ binary_count++;
+ else if (patch_update_file(&s, s.file_diff + i))
+ break;
+
+ if (s.file_diff_nr == 0)
+ fprintf(stderr, _("No changes.\n"));
+ else if (binary_count == s.file_diff_nr)
+ fprintf(stderr, _("Only binary files changed.\n"));
+
+ strbuf_release(&s.answer);
+ strbuf_release(&s.buf);
+ strbuf_release(&s.plain);
+ strbuf_release(&s.colored);
+ return 0;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-13 10:23:09 +0000