mirror of
https://github.com/git/git.git
synced 2024-12-05 16:04:29 +08:00
2ca0c53b31
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
777 lines
23 KiB
C
777 lines
23 KiB
C
#include "cache.h"
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#include "commit.h"
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#include "refs.h"
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#include "diff.h"
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#include "diffcore.h"
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#include "xdiff-interface.h"
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#include "ll-merge.h"
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#include "dir.h"
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#include "notes.h"
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#include "notes-merge.h"
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#include "strbuf.h"
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struct notes_merge_pair {
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unsigned char obj[20], base[20], local[20], remote[20];
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};
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void init_notes_merge_options(struct notes_merge_options *o)
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{
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memset(o, 0, sizeof(struct notes_merge_options));
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strbuf_init(&(o->commit_msg), 0);
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o->verbosity = NOTES_MERGE_VERBOSITY_DEFAULT;
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}
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static int path_to_sha1(const char *path, unsigned char *sha1)
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{
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char hex_sha1[40];
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int i = 0;
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while (*path && i < 40) {
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if (*path != '/')
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hex_sha1[i++] = *path;
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path++;
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}
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if (*path || i != 40)
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return -1;
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return get_sha1_hex(hex_sha1, sha1);
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}
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static int verify_notes_filepair(struct diff_filepair *p, unsigned char *sha1)
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{
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switch (p->status) {
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case DIFF_STATUS_MODIFIED:
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assert(p->one->mode == p->two->mode);
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assert(!is_null_sha1(p->one->sha1));
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assert(!is_null_sha1(p->two->sha1));
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break;
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case DIFF_STATUS_ADDED:
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assert(is_null_sha1(p->one->sha1));
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break;
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case DIFF_STATUS_DELETED:
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assert(is_null_sha1(p->two->sha1));
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break;
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default:
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return -1;
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}
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assert(!strcmp(p->one->path, p->two->path));
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return path_to_sha1(p->one->path, sha1);
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}
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static struct notes_merge_pair *find_notes_merge_pair_pos(
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struct notes_merge_pair *list, int len, unsigned char *obj,
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int insert_new, int *occupied)
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{
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/*
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* Both diff_tree_remote() and diff_tree_local() tend to process
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* merge_pairs in ascending order. Therefore, cache last returned
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* index, and search sequentially from there until the appropriate
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* position is found.
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*
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* Since inserts only happen from diff_tree_remote() (which mainly
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* _appends_), we don't care that inserting into the middle of the
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* list is expensive (using memmove()).
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*/
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static int last_index;
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int i = last_index < len ? last_index : len - 1;
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int prev_cmp = 0, cmp = -1;
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while (i >= 0 && i < len) {
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cmp = hashcmp(obj, list[i].obj);
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if (!cmp) /* obj belongs @ i */
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break;
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else if (cmp < 0 && prev_cmp <= 0) /* obj belongs < i */
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i--;
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else if (cmp < 0) /* obj belongs between i-1 and i */
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break;
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else if (cmp > 0 && prev_cmp >= 0) /* obj belongs > i */
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i++;
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else /* if (cmp > 0) */ { /* obj belongs between i and i+1 */
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i++;
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break;
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}
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prev_cmp = cmp;
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}
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if (i < 0)
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i = 0;
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/* obj belongs at, or immediately preceding, index i (0 <= i <= len) */
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if (!cmp)
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*occupied = 1;
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else {
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*occupied = 0;
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if (insert_new && i < len) {
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memmove(list + i + 1, list + i,
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(len - i) * sizeof(struct notes_merge_pair));
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memset(list + i, 0, sizeof(struct notes_merge_pair));
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}
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}
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last_index = i;
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return list + i;
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}
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static unsigned char uninitialized[20] =
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"\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff" \
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"\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff";
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static struct notes_merge_pair *diff_tree_remote(struct notes_merge_options *o,
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const unsigned char *base,
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const unsigned char *remote,
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int *num_changes)
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{
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struct diff_options opt;
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struct notes_merge_pair *changes;
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int i, len = 0;
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trace_printf("\tdiff_tree_remote(base = %.7s, remote = %.7s)\n",
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sha1_to_hex(base), sha1_to_hex(remote));
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diff_setup(&opt);
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DIFF_OPT_SET(&opt, RECURSIVE);
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opt.output_format = DIFF_FORMAT_NO_OUTPUT;
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if (diff_setup_done(&opt) < 0)
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die("diff_setup_done failed");
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diff_tree_sha1(base, remote, "", &opt);
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diffcore_std(&opt);
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changes = xcalloc(diff_queued_diff.nr, sizeof(struct notes_merge_pair));
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for (i = 0; i < diff_queued_diff.nr; i++) {
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struct diff_filepair *p = diff_queued_diff.queue[i];
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struct notes_merge_pair *mp;
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int occupied;
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unsigned char obj[20];
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if (verify_notes_filepair(p, obj)) {
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trace_printf("\t\tCannot merge entry '%s' (%c): "
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"%.7s -> %.7s. Skipping!\n", p->one->path,
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p->status, sha1_to_hex(p->one->sha1),
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sha1_to_hex(p->two->sha1));
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continue;
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}
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mp = find_notes_merge_pair_pos(changes, len, obj, 1, &occupied);
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if (occupied) {
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/* We've found an addition/deletion pair */
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assert(!hashcmp(mp->obj, obj));
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if (is_null_sha1(p->one->sha1)) { /* addition */
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assert(is_null_sha1(mp->remote));
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hashcpy(mp->remote, p->two->sha1);
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} else if (is_null_sha1(p->two->sha1)) { /* deletion */
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assert(is_null_sha1(mp->base));
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hashcpy(mp->base, p->one->sha1);
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} else
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assert(!"Invalid existing change recorded");
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} else {
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hashcpy(mp->obj, obj);
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hashcpy(mp->base, p->one->sha1);
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hashcpy(mp->local, uninitialized);
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hashcpy(mp->remote, p->two->sha1);
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len++;
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}
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trace_printf("\t\tStored remote change for %s: %.7s -> %.7s\n",
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sha1_to_hex(mp->obj), sha1_to_hex(mp->base),
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sha1_to_hex(mp->remote));
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}
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diff_flush(&opt);
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diff_tree_release_paths(&opt);
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*num_changes = len;
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return changes;
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}
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static void diff_tree_local(struct notes_merge_options *o,
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struct notes_merge_pair *changes, int len,
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const unsigned char *base,
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const unsigned char *local)
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{
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struct diff_options opt;
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int i;
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trace_printf("\tdiff_tree_local(len = %i, base = %.7s, local = %.7s)\n",
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len, sha1_to_hex(base), sha1_to_hex(local));
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diff_setup(&opt);
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DIFF_OPT_SET(&opt, RECURSIVE);
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opt.output_format = DIFF_FORMAT_NO_OUTPUT;
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if (diff_setup_done(&opt) < 0)
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die("diff_setup_done failed");
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diff_tree_sha1(base, local, "", &opt);
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diffcore_std(&opt);
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for (i = 0; i < diff_queued_diff.nr; i++) {
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struct diff_filepair *p = diff_queued_diff.queue[i];
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struct notes_merge_pair *mp;
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int match;
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unsigned char obj[20];
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if (verify_notes_filepair(p, obj)) {
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trace_printf("\t\tCannot merge entry '%s' (%c): "
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"%.7s -> %.7s. Skipping!\n", p->one->path,
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p->status, sha1_to_hex(p->one->sha1),
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sha1_to_hex(p->two->sha1));
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continue;
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}
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mp = find_notes_merge_pair_pos(changes, len, obj, 0, &match);
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if (!match) {
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trace_printf("\t\tIgnoring local-only change for %s: "
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"%.7s -> %.7s\n", sha1_to_hex(obj),
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sha1_to_hex(p->one->sha1),
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sha1_to_hex(p->two->sha1));
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continue;
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}
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assert(!hashcmp(mp->obj, obj));
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if (is_null_sha1(p->two->sha1)) { /* deletion */
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/*
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* Either this is a true deletion (1), or it is part
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* of an A/D pair (2), or D/A pair (3):
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*
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* (1) mp->local is uninitialized; set it to null_sha1
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* (2) mp->local is not uninitialized; don't touch it
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* (3) mp->local is uninitialized; set it to null_sha1
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* (will be overwritten by following addition)
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*/
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if (!hashcmp(mp->local, uninitialized))
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hashclr(mp->local);
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} else if (is_null_sha1(p->one->sha1)) { /* addition */
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/*
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* Either this is a true addition (1), or it is part
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* of an A/D pair (2), or D/A pair (3):
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*
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* (1) mp->local is uninitialized; set to p->two->sha1
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* (2) mp->local is uninitialized; set to p->two->sha1
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* (3) mp->local is null_sha1; set to p->two->sha1
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*/
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assert(is_null_sha1(mp->local) ||
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!hashcmp(mp->local, uninitialized));
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hashcpy(mp->local, p->two->sha1);
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} else { /* modification */
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/*
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* This is a true modification. p->one->sha1 shall
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* match mp->base, and mp->local shall be uninitialized.
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* Set mp->local to p->two->sha1.
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*/
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assert(!hashcmp(p->one->sha1, mp->base));
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assert(!hashcmp(mp->local, uninitialized));
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hashcpy(mp->local, p->two->sha1);
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}
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trace_printf("\t\tStored local change for %s: %.7s -> %.7s\n",
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sha1_to_hex(mp->obj), sha1_to_hex(mp->base),
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sha1_to_hex(mp->local));
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}
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diff_flush(&opt);
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diff_tree_release_paths(&opt);
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}
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static void check_notes_merge_worktree(struct notes_merge_options *o)
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{
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if (!o->has_worktree) {
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/*
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* Must establish NOTES_MERGE_WORKTREE.
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* Abort if NOTES_MERGE_WORKTREE already exists
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*/
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if (file_exists(git_path(NOTES_MERGE_WORKTREE)) &&
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!is_empty_dir(git_path(NOTES_MERGE_WORKTREE))) {
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if (advice_resolve_conflict)
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die("You have not concluded your previous "
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"notes merge (%s exists).\nPlease, use "
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"'git notes merge --commit' or 'git notes "
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"merge --abort' to commit/abort the "
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"previous merge before you start a new "
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"notes merge.", git_path("NOTES_MERGE_*"));
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else
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die("You have not concluded your notes merge "
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"(%s exists).", git_path("NOTES_MERGE_*"));
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}
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if (safe_create_leading_directories(git_path(
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NOTES_MERGE_WORKTREE "/.test")))
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die_errno("unable to create directory %s",
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git_path(NOTES_MERGE_WORKTREE));
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o->has_worktree = 1;
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} else if (!file_exists(git_path(NOTES_MERGE_WORKTREE)))
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/* NOTES_MERGE_WORKTREE should already be established */
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die("missing '%s'. This should not happen",
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git_path(NOTES_MERGE_WORKTREE));
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}
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static void write_buf_to_worktree(const unsigned char *obj,
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const char *buf, unsigned long size)
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{
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int fd;
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char *path = git_path(NOTES_MERGE_WORKTREE "/%s", sha1_to_hex(obj));
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if (safe_create_leading_directories(path))
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die_errno("unable to create directory for '%s'", path);
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if (file_exists(path))
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die("found existing file at '%s'", path);
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fd = open(path, O_WRONLY | O_TRUNC | O_CREAT, 0666);
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if (fd < 0)
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die_errno("failed to open '%s'", path);
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while (size > 0) {
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long ret = write_in_full(fd, buf, size);
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if (ret < 0) {
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/* Ignore epipe */
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if (errno == EPIPE)
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break;
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die_errno("notes-merge");
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} else if (!ret) {
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die("notes-merge: disk full?");
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}
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size -= ret;
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buf += ret;
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}
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close(fd);
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}
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static void write_note_to_worktree(const unsigned char *obj,
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const unsigned char *note)
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{
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enum object_type type;
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unsigned long size;
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void *buf = read_sha1_file(note, &type, &size);
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if (!buf)
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die("cannot read note %s for object %s",
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sha1_to_hex(note), sha1_to_hex(obj));
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if (type != OBJ_BLOB)
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die("blob expected in note %s for object %s",
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sha1_to_hex(note), sha1_to_hex(obj));
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write_buf_to_worktree(obj, buf, size);
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free(buf);
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}
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static int ll_merge_in_worktree(struct notes_merge_options *o,
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struct notes_merge_pair *p)
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{
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mmbuffer_t result_buf;
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mmfile_t base, local, remote;
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int status;
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read_mmblob(&base, p->base);
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read_mmblob(&local, p->local);
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read_mmblob(&remote, p->remote);
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status = ll_merge(&result_buf, sha1_to_hex(p->obj), &base, NULL,
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&local, o->local_ref, &remote, o->remote_ref, NULL);
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free(base.ptr);
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free(local.ptr);
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free(remote.ptr);
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if ((status < 0) || !result_buf.ptr)
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die("Failed to execute internal merge");
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write_buf_to_worktree(p->obj, result_buf.ptr, result_buf.size);
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free(result_buf.ptr);
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return status;
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}
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static int merge_one_change_manual(struct notes_merge_options *o,
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struct notes_merge_pair *p,
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struct notes_tree *t)
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{
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const char *lref = o->local_ref ? o->local_ref : "local version";
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const char *rref = o->remote_ref ? o->remote_ref : "remote version";
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trace_printf("\t\t\tmerge_one_change_manual(obj = %.7s, base = %.7s, "
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"local = %.7s, remote = %.7s)\n",
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sha1_to_hex(p->obj), sha1_to_hex(p->base),
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sha1_to_hex(p->local), sha1_to_hex(p->remote));
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/* add "Conflicts:" section to commit message first time through */
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if (!o->has_worktree)
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strbuf_addstr(&(o->commit_msg), "\n\nConflicts:\n");
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strbuf_addf(&(o->commit_msg), "\t%s\n", sha1_to_hex(p->obj));
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if (o->verbosity >= 2)
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printf("Auto-merging notes for %s\n", sha1_to_hex(p->obj));
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check_notes_merge_worktree(o);
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if (is_null_sha1(p->local)) {
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/* D/F conflict, checkout p->remote */
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assert(!is_null_sha1(p->remote));
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if (o->verbosity >= 1)
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printf("CONFLICT (delete/modify): Notes for object %s "
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"deleted in %s and modified in %s. Version from %s "
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"left in tree.\n",
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sha1_to_hex(p->obj), lref, rref, rref);
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write_note_to_worktree(p->obj, p->remote);
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} else if (is_null_sha1(p->remote)) {
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/* D/F conflict, checkout p->local */
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assert(!is_null_sha1(p->local));
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if (o->verbosity >= 1)
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printf("CONFLICT (delete/modify): Notes for object %s "
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"deleted in %s and modified in %s. Version from %s "
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"left in tree.\n",
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sha1_to_hex(p->obj), rref, lref, lref);
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write_note_to_worktree(p->obj, p->local);
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} else {
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/* "regular" conflict, checkout result of ll_merge() */
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const char *reason = "content";
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if (is_null_sha1(p->base))
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reason = "add/add";
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assert(!is_null_sha1(p->local));
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assert(!is_null_sha1(p->remote));
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if (o->verbosity >= 1)
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printf("CONFLICT (%s): Merge conflict in notes for "
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"object %s\n", reason, sha1_to_hex(p->obj));
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ll_merge_in_worktree(o, p);
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}
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trace_printf("\t\t\tremoving from partial merge result\n");
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remove_note(t, p->obj);
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return 1;
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}
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static int merge_one_change(struct notes_merge_options *o,
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struct notes_merge_pair *p, struct notes_tree *t)
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{
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/*
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* Return 0 if change is successfully resolved (stored in notes_tree).
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* Return 1 is change results in a conflict (NOT stored in notes_tree,
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* but instead written to NOTES_MERGE_WORKTREE with conflict markers).
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*/
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switch (o->strategy) {
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case NOTES_MERGE_RESOLVE_MANUAL:
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return merge_one_change_manual(o, p, t);
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case NOTES_MERGE_RESOLVE_OURS:
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if (o->verbosity >= 2)
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printf("Using local notes for %s\n",
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sha1_to_hex(p->obj));
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/* nothing to do */
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return 0;
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case NOTES_MERGE_RESOLVE_THEIRS:
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if (o->verbosity >= 2)
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printf("Using remote notes for %s\n",
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sha1_to_hex(p->obj));
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if (add_note(t, p->obj, p->remote, combine_notes_overwrite))
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die("BUG: combine_notes_overwrite failed");
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return 0;
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case NOTES_MERGE_RESOLVE_UNION:
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if (o->verbosity >= 2)
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printf("Concatenating local and remote notes for %s\n",
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sha1_to_hex(p->obj));
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if (add_note(t, p->obj, p->remote, combine_notes_concatenate))
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die("failed to concatenate notes "
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"(combine_notes_concatenate)");
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return 0;
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case NOTES_MERGE_RESOLVE_CAT_SORT_UNIQ:
|
|
if (o->verbosity >= 2)
|
|
printf("Concatenating unique lines in local and remote "
|
|
"notes for %s\n", sha1_to_hex(p->obj));
|
|
if (add_note(t, p->obj, p->remote, combine_notes_cat_sort_uniq))
|
|
die("failed to concatenate notes "
|
|
"(combine_notes_cat_sort_uniq)");
|
|
return 0;
|
|
}
|
|
die("Unknown strategy (%i).", o->strategy);
|
|
}
|
|
|
|
static int merge_changes(struct notes_merge_options *o,
|
|
struct notes_merge_pair *changes, int *num_changes,
|
|
struct notes_tree *t)
|
|
{
|
|
int i, conflicts = 0;
|
|
|
|
trace_printf("\tmerge_changes(num_changes = %i)\n", *num_changes);
|
|
for (i = 0; i < *num_changes; i++) {
|
|
struct notes_merge_pair *p = changes + i;
|
|
trace_printf("\t\t%.7s: %.7s -> %.7s/%.7s\n",
|
|
sha1_to_hex(p->obj), sha1_to_hex(p->base),
|
|
sha1_to_hex(p->local), sha1_to_hex(p->remote));
|
|
|
|
if (!hashcmp(p->base, p->remote)) {
|
|
/* no remote change; nothing to do */
|
|
trace_printf("\t\t\tskipping (no remote change)\n");
|
|
} else if (!hashcmp(p->local, p->remote)) {
|
|
/* same change in local and remote; nothing to do */
|
|
trace_printf("\t\t\tskipping (local == remote)\n");
|
|
} else if (!hashcmp(p->local, uninitialized) ||
|
|
!hashcmp(p->local, p->base)) {
|
|
/* no local change; adopt remote change */
|
|
trace_printf("\t\t\tno local change, adopted remote\n");
|
|
if (add_note(t, p->obj, p->remote,
|
|
combine_notes_overwrite))
|
|
die("BUG: combine_notes_overwrite failed");
|
|
} else {
|
|
/* need file-level merge between local and remote */
|
|
trace_printf("\t\t\tneed content-level merge\n");
|
|
conflicts += merge_one_change(o, p, t);
|
|
}
|
|
}
|
|
|
|
return conflicts;
|
|
}
|
|
|
|
static int merge_from_diffs(struct notes_merge_options *o,
|
|
const unsigned char *base,
|
|
const unsigned char *local,
|
|
const unsigned char *remote, struct notes_tree *t)
|
|
{
|
|
struct notes_merge_pair *changes;
|
|
int num_changes, conflicts;
|
|
|
|
trace_printf("\tmerge_from_diffs(base = %.7s, local = %.7s, "
|
|
"remote = %.7s)\n", sha1_to_hex(base), sha1_to_hex(local),
|
|
sha1_to_hex(remote));
|
|
|
|
changes = diff_tree_remote(o, base, remote, &num_changes);
|
|
diff_tree_local(o, changes, num_changes, base, local);
|
|
|
|
conflicts = merge_changes(o, changes, &num_changes, t);
|
|
free(changes);
|
|
|
|
if (o->verbosity >= 4)
|
|
printf(t->dirty ?
|
|
"Merge result: %i unmerged notes and a dirty notes tree\n" :
|
|
"Merge result: %i unmerged notes and a clean notes tree\n",
|
|
conflicts);
|
|
|
|
return conflicts ? -1 : 1;
|
|
}
|
|
|
|
void create_notes_commit(struct notes_tree *t, struct commit_list *parents,
|
|
const struct strbuf *msg, unsigned char *result_sha1)
|
|
{
|
|
unsigned char tree_sha1[20];
|
|
|
|
assert(t->initialized);
|
|
|
|
if (write_notes_tree(t, tree_sha1))
|
|
die("Failed to write notes tree to database");
|
|
|
|
if (!parents) {
|
|
/* Deduce parent commit from t->ref */
|
|
unsigned char parent_sha1[20];
|
|
if (!read_ref(t->ref, parent_sha1)) {
|
|
struct commit *parent = lookup_commit(parent_sha1);
|
|
if (!parent || parse_commit(parent))
|
|
die("Failed to find/parse commit %s", t->ref);
|
|
commit_list_insert(parent, &parents);
|
|
}
|
|
/* else: t->ref points to nothing, assume root/orphan commit */
|
|
}
|
|
|
|
if (commit_tree(msg, tree_sha1, parents, result_sha1, NULL, NULL))
|
|
die("Failed to commit notes tree to database");
|
|
}
|
|
|
|
int notes_merge(struct notes_merge_options *o,
|
|
struct notes_tree *local_tree,
|
|
unsigned char *result_sha1)
|
|
{
|
|
unsigned char local_sha1[20], remote_sha1[20];
|
|
struct commit *local, *remote;
|
|
struct commit_list *bases = NULL;
|
|
const unsigned char *base_sha1, *base_tree_sha1;
|
|
int result = 0;
|
|
|
|
assert(o->local_ref && o->remote_ref);
|
|
assert(!strcmp(o->local_ref, local_tree->ref));
|
|
hashclr(result_sha1);
|
|
|
|
trace_printf("notes_merge(o->local_ref = %s, o->remote_ref = %s)\n",
|
|
o->local_ref, o->remote_ref);
|
|
|
|
/* Dereference o->local_ref into local_sha1 */
|
|
if (read_ref_full(o->local_ref, local_sha1, 0, NULL))
|
|
die("Failed to resolve local notes ref '%s'", o->local_ref);
|
|
else if (!check_refname_format(o->local_ref, 0) &&
|
|
is_null_sha1(local_sha1))
|
|
local = NULL; /* local_sha1 == null_sha1 indicates unborn ref */
|
|
else if (!(local = lookup_commit_reference(local_sha1)))
|
|
die("Could not parse local commit %s (%s)",
|
|
sha1_to_hex(local_sha1), o->local_ref);
|
|
trace_printf("\tlocal commit: %.7s\n", sha1_to_hex(local_sha1));
|
|
|
|
/* Dereference o->remote_ref into remote_sha1 */
|
|
if (get_sha1(o->remote_ref, remote_sha1)) {
|
|
/*
|
|
* Failed to get remote_sha1. If o->remote_ref looks like an
|
|
* unborn ref, perform the merge using an empty notes tree.
|
|
*/
|
|
if (!check_refname_format(o->remote_ref, 0)) {
|
|
hashclr(remote_sha1);
|
|
remote = NULL;
|
|
} else {
|
|
die("Failed to resolve remote notes ref '%s'",
|
|
o->remote_ref);
|
|
}
|
|
} else if (!(remote = lookup_commit_reference(remote_sha1))) {
|
|
die("Could not parse remote commit %s (%s)",
|
|
sha1_to_hex(remote_sha1), o->remote_ref);
|
|
}
|
|
trace_printf("\tremote commit: %.7s\n", sha1_to_hex(remote_sha1));
|
|
|
|
if (!local && !remote)
|
|
die("Cannot merge empty notes ref (%s) into empty notes ref "
|
|
"(%s)", o->remote_ref, o->local_ref);
|
|
if (!local) {
|
|
/* result == remote commit */
|
|
hashcpy(result_sha1, remote_sha1);
|
|
goto found_result;
|
|
}
|
|
if (!remote) {
|
|
/* result == local commit */
|
|
hashcpy(result_sha1, local_sha1);
|
|
goto found_result;
|
|
}
|
|
assert(local && remote);
|
|
|
|
/* Find merge bases */
|
|
bases = get_merge_bases(local, remote, 1);
|
|
if (!bases) {
|
|
base_sha1 = null_sha1;
|
|
base_tree_sha1 = EMPTY_TREE_SHA1_BIN;
|
|
if (o->verbosity >= 4)
|
|
printf("No merge base found; doing history-less merge\n");
|
|
} else if (!bases->next) {
|
|
base_sha1 = bases->item->object.sha1;
|
|
base_tree_sha1 = bases->item->tree->object.sha1;
|
|
if (o->verbosity >= 4)
|
|
printf("One merge base found (%.7s)\n",
|
|
sha1_to_hex(base_sha1));
|
|
} else {
|
|
/* TODO: How to handle multiple merge-bases? */
|
|
base_sha1 = bases->item->object.sha1;
|
|
base_tree_sha1 = bases->item->tree->object.sha1;
|
|
if (o->verbosity >= 3)
|
|
printf("Multiple merge bases found. Using the first "
|
|
"(%.7s)\n", sha1_to_hex(base_sha1));
|
|
}
|
|
|
|
if (o->verbosity >= 4)
|
|
printf("Merging remote commit %.7s into local commit %.7s with "
|
|
"merge-base %.7s\n", sha1_to_hex(remote->object.sha1),
|
|
sha1_to_hex(local->object.sha1),
|
|
sha1_to_hex(base_sha1));
|
|
|
|
if (!hashcmp(remote->object.sha1, base_sha1)) {
|
|
/* Already merged; result == local commit */
|
|
if (o->verbosity >= 2)
|
|
printf("Already up-to-date!\n");
|
|
hashcpy(result_sha1, local->object.sha1);
|
|
goto found_result;
|
|
}
|
|
if (!hashcmp(local->object.sha1, base_sha1)) {
|
|
/* Fast-forward; result == remote commit */
|
|
if (o->verbosity >= 2)
|
|
printf("Fast-forward\n");
|
|
hashcpy(result_sha1, remote->object.sha1);
|
|
goto found_result;
|
|
}
|
|
|
|
result = merge_from_diffs(o, base_tree_sha1, local->tree->object.sha1,
|
|
remote->tree->object.sha1, local_tree);
|
|
|
|
if (result != 0) { /* non-trivial merge (with or without conflicts) */
|
|
/* Commit (partial) result */
|
|
struct commit_list *parents = NULL;
|
|
commit_list_insert(remote, &parents); /* LIFO order */
|
|
commit_list_insert(local, &parents);
|
|
create_notes_commit(local_tree, parents, &o->commit_msg,
|
|
result_sha1);
|
|
}
|
|
|
|
found_result:
|
|
free_commit_list(bases);
|
|
strbuf_release(&(o->commit_msg));
|
|
trace_printf("notes_merge(): result = %i, result_sha1 = %.7s\n",
|
|
result, sha1_to_hex(result_sha1));
|
|
return result;
|
|
}
|
|
|
|
int notes_merge_commit(struct notes_merge_options *o,
|
|
struct notes_tree *partial_tree,
|
|
struct commit *partial_commit,
|
|
unsigned char *result_sha1)
|
|
{
|
|
/*
|
|
* Iterate through files in .git/NOTES_MERGE_WORKTREE and add all
|
|
* found notes to 'partial_tree'. Write the updated notes tree to
|
|
* the DB, and commit the resulting tree object while reusing the
|
|
* commit message and parents from 'partial_commit'.
|
|
* Finally store the new commit object SHA1 into 'result_sha1'.
|
|
*/
|
|
DIR *dir;
|
|
struct dirent *e;
|
|
struct strbuf path = STRBUF_INIT;
|
|
char *msg = strstr(partial_commit->buffer, "\n\n");
|
|
struct strbuf sb_msg = STRBUF_INIT;
|
|
int baselen;
|
|
|
|
strbuf_addstr(&path, git_path(NOTES_MERGE_WORKTREE));
|
|
if (o->verbosity >= 3)
|
|
printf("Committing notes in notes merge worktree at %s\n",
|
|
path.buf);
|
|
|
|
if (!msg || msg[2] == '\0')
|
|
die("partial notes commit has empty message");
|
|
msg += 2;
|
|
|
|
dir = opendir(path.buf);
|
|
if (!dir)
|
|
die_errno("could not open %s", path.buf);
|
|
|
|
strbuf_addch(&path, '/');
|
|
baselen = path.len;
|
|
while ((e = readdir(dir)) != NULL) {
|
|
struct stat st;
|
|
unsigned char obj_sha1[20], blob_sha1[20];
|
|
|
|
if (is_dot_or_dotdot(e->d_name))
|
|
continue;
|
|
|
|
if (strlen(e->d_name) != 40 || get_sha1_hex(e->d_name, obj_sha1)) {
|
|
if (o->verbosity >= 3)
|
|
printf("Skipping non-SHA1 entry '%s%s'\n",
|
|
path.buf, e->d_name);
|
|
continue;
|
|
}
|
|
|
|
strbuf_addstr(&path, e->d_name);
|
|
/* write file as blob, and add to partial_tree */
|
|
if (stat(path.buf, &st))
|
|
die_errno("Failed to stat '%s'", path.buf);
|
|
if (index_path(blob_sha1, path.buf, &st, HASH_WRITE_OBJECT))
|
|
die("Failed to write blob object from '%s'", path.buf);
|
|
if (add_note(partial_tree, obj_sha1, blob_sha1, NULL))
|
|
die("Failed to add resolved note '%s' to notes tree",
|
|
path.buf);
|
|
if (o->verbosity >= 4)
|
|
printf("Added resolved note for object %s: %s\n",
|
|
sha1_to_hex(obj_sha1), sha1_to_hex(blob_sha1));
|
|
strbuf_setlen(&path, baselen);
|
|
}
|
|
|
|
strbuf_attach(&sb_msg, msg, strlen(msg), strlen(msg) + 1);
|
|
create_notes_commit(partial_tree, partial_commit->parents, &sb_msg,
|
|
result_sha1);
|
|
if (o->verbosity >= 4)
|
|
printf("Finalized notes merge commit: %s\n",
|
|
sha1_to_hex(result_sha1));
|
|
strbuf_release(&path);
|
|
closedir(dir);
|
|
return 0;
|
|
}
|
|
|
|
int notes_merge_abort(struct notes_merge_options *o)
|
|
{
|
|
/*
|
|
* Remove all files within .git/NOTES_MERGE_WORKTREE. We do not remove
|
|
* the .git/NOTES_MERGE_WORKTREE directory itself, since it might be
|
|
* the current working directory of the user.
|
|
*/
|
|
struct strbuf buf = STRBUF_INIT;
|
|
int ret;
|
|
|
|
strbuf_addstr(&buf, git_path(NOTES_MERGE_WORKTREE));
|
|
if (o->verbosity >= 3)
|
|
printf("Removing notes merge worktree at %s/*\n", buf.buf);
|
|
ret = remove_dir_recursively(&buf, REMOVE_DIR_KEEP_TOPLEVEL);
|
|
strbuf_release(&buf);
|
|
return ret;
|
|
}
|