caa7d79f1f
* maint: Correct common spelling mistakes in comments and tests kwset: fix spelling in comments precompose-utf8: fix spelling of "want" in error message compat/nedmalloc: fix spelling in comments compat/regex: fix spelling and grammar in comments obstack: fix spelling of similar contrib/subtree: fix spelling of accidentally git-remote-mediawiki: spelling fixes doc: various spelling fixes fast-export: fix argument name in error messages Documentation: distinguish between ref and offset deltas in pack-format i18n: make the translation of -u advice in one go
1448 lines
34 KiB
C
1448 lines
34 KiB
C
#include "cache.h"
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#include "tag.h"
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#include "commit.h"
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#include "pkt-line.h"
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#include "utf8.h"
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#include "diff.h"
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#include "revision.h"
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#include "notes.h"
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#include "gpg-interface.h"
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#include "mergesort.h"
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static struct commit_extra_header *read_commit_extra_header_lines(const char *buf, size_t len, const char **);
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int save_commit_buffer = 1;
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const char *commit_type = "commit";
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static struct commit *check_commit(struct object *obj,
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const unsigned char *sha1,
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int quiet)
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{
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if (obj->type != OBJ_COMMIT) {
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if (!quiet)
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error("Object %s is a %s, not a commit",
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sha1_to_hex(sha1), typename(obj->type));
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return NULL;
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}
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return (struct commit *) obj;
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}
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struct commit *lookup_commit_reference_gently(const unsigned char *sha1,
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int quiet)
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{
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struct object *obj = deref_tag(parse_object(sha1), NULL, 0);
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if (!obj)
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return NULL;
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return check_commit(obj, sha1, quiet);
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}
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struct commit *lookup_commit_reference(const unsigned char *sha1)
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{
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return lookup_commit_reference_gently(sha1, 0);
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}
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struct commit *lookup_commit_or_die(const unsigned char *sha1, const char *ref_name)
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{
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struct commit *c = lookup_commit_reference(sha1);
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if (!c)
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die(_("could not parse %s"), ref_name);
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if (hashcmp(sha1, c->object.sha1)) {
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warning(_("%s %s is not a commit!"),
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ref_name, sha1_to_hex(sha1));
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}
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return c;
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}
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struct commit *lookup_commit(const unsigned char *sha1)
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{
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struct object *obj = lookup_object(sha1);
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if (!obj)
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return create_object(sha1, OBJ_COMMIT, alloc_commit_node());
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if (!obj->type)
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obj->type = OBJ_COMMIT;
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return check_commit(obj, sha1, 0);
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}
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struct commit *lookup_commit_reference_by_name(const char *name)
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{
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unsigned char sha1[20];
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struct commit *commit;
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if (get_sha1_committish(name, sha1))
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return NULL;
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commit = lookup_commit_reference(sha1);
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if (!commit || parse_commit(commit))
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return NULL;
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return commit;
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}
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static unsigned long parse_commit_date(const char *buf, const char *tail)
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{
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const char *dateptr;
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if (buf + 6 >= tail)
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return 0;
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if (memcmp(buf, "author", 6))
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return 0;
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while (buf < tail && *buf++ != '\n')
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/* nada */;
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if (buf + 9 >= tail)
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return 0;
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if (memcmp(buf, "committer", 9))
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return 0;
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while (buf < tail && *buf++ != '>')
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/* nada */;
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if (buf >= tail)
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return 0;
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dateptr = buf;
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while (buf < tail && *buf++ != '\n')
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/* nada */;
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if (buf >= tail)
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return 0;
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/* dateptr < buf && buf[-1] == '\n', so strtoul will stop at buf-1 */
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return strtoul(dateptr, NULL, 10);
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}
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static struct commit_graft **commit_graft;
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static int commit_graft_alloc, commit_graft_nr;
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static int commit_graft_pos(const unsigned char *sha1)
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{
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int lo, hi;
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lo = 0;
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hi = commit_graft_nr;
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while (lo < hi) {
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int mi = (lo + hi) / 2;
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struct commit_graft *graft = commit_graft[mi];
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int cmp = hashcmp(sha1, graft->sha1);
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if (!cmp)
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return mi;
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if (cmp < 0)
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hi = mi;
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else
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lo = mi + 1;
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}
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return -lo - 1;
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}
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int register_commit_graft(struct commit_graft *graft, int ignore_dups)
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{
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int pos = commit_graft_pos(graft->sha1);
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if (0 <= pos) {
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if (ignore_dups)
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free(graft);
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else {
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free(commit_graft[pos]);
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commit_graft[pos] = graft;
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}
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return 1;
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}
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pos = -pos - 1;
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if (commit_graft_alloc <= ++commit_graft_nr) {
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commit_graft_alloc = alloc_nr(commit_graft_alloc);
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commit_graft = xrealloc(commit_graft,
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sizeof(*commit_graft) *
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commit_graft_alloc);
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}
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if (pos < commit_graft_nr)
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memmove(commit_graft + pos + 1,
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commit_graft + pos,
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(commit_graft_nr - pos - 1) *
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sizeof(*commit_graft));
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commit_graft[pos] = graft;
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return 0;
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}
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struct commit_graft *read_graft_line(char *buf, int len)
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{
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/* The format is just "Commit Parent1 Parent2 ...\n" */
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int i;
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struct commit_graft *graft = NULL;
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while (len && isspace(buf[len-1]))
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buf[--len] = '\0';
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if (buf[0] == '#' || buf[0] == '\0')
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return NULL;
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if ((len + 1) % 41)
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goto bad_graft_data;
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i = (len + 1) / 41 - 1;
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graft = xmalloc(sizeof(*graft) + 20 * i);
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graft->nr_parent = i;
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if (get_sha1_hex(buf, graft->sha1))
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goto bad_graft_data;
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for (i = 40; i < len; i += 41) {
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if (buf[i] != ' ')
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goto bad_graft_data;
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if (get_sha1_hex(buf + i + 1, graft->parent[i/41]))
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goto bad_graft_data;
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}
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return graft;
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bad_graft_data:
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error("bad graft data: %s", buf);
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free(graft);
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return NULL;
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}
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static int read_graft_file(const char *graft_file)
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{
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FILE *fp = fopen(graft_file, "r");
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char buf[1024];
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if (!fp)
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return -1;
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while (fgets(buf, sizeof(buf), fp)) {
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/* The format is just "Commit Parent1 Parent2 ...\n" */
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int len = strlen(buf);
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struct commit_graft *graft = read_graft_line(buf, len);
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if (!graft)
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continue;
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if (register_commit_graft(graft, 1))
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error("duplicate graft data: %s", buf);
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}
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fclose(fp);
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return 0;
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}
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static void prepare_commit_graft(void)
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{
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static int commit_graft_prepared;
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char *graft_file;
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if (commit_graft_prepared)
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return;
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graft_file = get_graft_file();
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read_graft_file(graft_file);
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/* make sure shallows are read */
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is_repository_shallow();
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commit_graft_prepared = 1;
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}
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struct commit_graft *lookup_commit_graft(const unsigned char *sha1)
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{
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int pos;
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prepare_commit_graft();
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pos = commit_graft_pos(sha1);
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if (pos < 0)
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return NULL;
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return commit_graft[pos];
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}
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int for_each_commit_graft(each_commit_graft_fn fn, void *cb_data)
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{
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int i, ret;
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for (i = ret = 0; i < commit_graft_nr && !ret; i++)
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ret = fn(commit_graft[i], cb_data);
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return ret;
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}
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int unregister_shallow(const unsigned char *sha1)
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{
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int pos = commit_graft_pos(sha1);
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if (pos < 0)
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return -1;
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if (pos + 1 < commit_graft_nr)
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memmove(commit_graft + pos, commit_graft + pos + 1,
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sizeof(struct commit_graft *)
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* (commit_graft_nr - pos - 1));
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commit_graft_nr--;
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return 0;
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}
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int parse_commit_buffer(struct commit *item, const void *buffer, unsigned long size)
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{
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const char *tail = buffer;
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const char *bufptr = buffer;
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unsigned char parent[20];
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struct commit_list **pptr;
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struct commit_graft *graft;
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if (item->object.parsed)
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return 0;
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item->object.parsed = 1;
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tail += size;
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if (tail <= bufptr + 46 || memcmp(bufptr, "tree ", 5) || bufptr[45] != '\n')
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return error("bogus commit object %s", sha1_to_hex(item->object.sha1));
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if (get_sha1_hex(bufptr + 5, parent) < 0)
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return error("bad tree pointer in commit %s",
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sha1_to_hex(item->object.sha1));
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item->tree = lookup_tree(parent);
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bufptr += 46; /* "tree " + "hex sha1" + "\n" */
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pptr = &item->parents;
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graft = lookup_commit_graft(item->object.sha1);
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while (bufptr + 48 < tail && !memcmp(bufptr, "parent ", 7)) {
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struct commit *new_parent;
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if (tail <= bufptr + 48 ||
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get_sha1_hex(bufptr + 7, parent) ||
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bufptr[47] != '\n')
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return error("bad parents in commit %s", sha1_to_hex(item->object.sha1));
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bufptr += 48;
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/*
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* The clone is shallow if nr_parent < 0, and we must
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* not traverse its real parents even when we unhide them.
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*/
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if (graft && (graft->nr_parent < 0 || grafts_replace_parents))
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continue;
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new_parent = lookup_commit(parent);
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if (new_parent)
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pptr = &commit_list_insert(new_parent, pptr)->next;
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}
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if (graft) {
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int i;
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struct commit *new_parent;
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for (i = 0; i < graft->nr_parent; i++) {
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new_parent = lookup_commit(graft->parent[i]);
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if (!new_parent)
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continue;
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pptr = &commit_list_insert(new_parent, pptr)->next;
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}
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}
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item->date = parse_commit_date(bufptr, tail);
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return 0;
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}
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int parse_commit(struct commit *item)
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{
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enum object_type type;
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void *buffer;
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unsigned long size;
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int ret;
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if (!item)
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return -1;
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if (item->object.parsed)
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return 0;
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buffer = read_sha1_file(item->object.sha1, &type, &size);
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if (!buffer)
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return error("Could not read %s",
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sha1_to_hex(item->object.sha1));
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if (type != OBJ_COMMIT) {
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free(buffer);
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return error("Object %s not a commit",
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sha1_to_hex(item->object.sha1));
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}
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ret = parse_commit_buffer(item, buffer, size);
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if (save_commit_buffer && !ret) {
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item->buffer = buffer;
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return 0;
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}
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free(buffer);
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return ret;
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}
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int find_commit_subject(const char *commit_buffer, const char **subject)
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{
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const char *eol;
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const char *p = commit_buffer;
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while (*p && (*p != '\n' || p[1] != '\n'))
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p++;
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if (*p) {
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p += 2;
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for (eol = p; *eol && *eol != '\n'; eol++)
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; /* do nothing */
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} else
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eol = p;
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*subject = p;
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return eol - p;
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}
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struct commit_list *commit_list_insert(struct commit *item, struct commit_list **list_p)
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{
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struct commit_list *new_list = xmalloc(sizeof(struct commit_list));
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new_list->item = item;
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new_list->next = *list_p;
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*list_p = new_list;
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return new_list;
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}
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unsigned commit_list_count(const struct commit_list *l)
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{
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unsigned c = 0;
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for (; l; l = l->next )
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c++;
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return c;
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}
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void free_commit_list(struct commit_list *list)
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{
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while (list) {
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struct commit_list *temp = list;
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list = temp->next;
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free(temp);
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}
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}
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struct commit_list * commit_list_insert_by_date(struct commit *item, struct commit_list **list)
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{
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struct commit_list **pp = list;
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struct commit_list *p;
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while ((p = *pp) != NULL) {
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if (p->item->date < item->date) {
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break;
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}
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pp = &p->next;
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}
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return commit_list_insert(item, pp);
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}
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static int commit_list_compare_by_date(const void *a, const void *b)
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{
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unsigned long a_date = ((const struct commit_list *)a)->item->date;
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unsigned long b_date = ((const struct commit_list *)b)->item->date;
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if (a_date < b_date)
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return 1;
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if (a_date > b_date)
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return -1;
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return 0;
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}
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static void *commit_list_get_next(const void *a)
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{
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return ((const struct commit_list *)a)->next;
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}
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static void commit_list_set_next(void *a, void *next)
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{
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((struct commit_list *)a)->next = next;
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}
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void commit_list_sort_by_date(struct commit_list **list)
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{
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*list = llist_mergesort(*list, commit_list_get_next, commit_list_set_next,
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commit_list_compare_by_date);
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}
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struct commit *pop_most_recent_commit(struct commit_list **list,
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unsigned int mark)
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{
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struct commit *ret = (*list)->item;
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struct commit_list *parents = ret->parents;
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struct commit_list *old = *list;
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*list = (*list)->next;
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free(old);
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while (parents) {
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struct commit *commit = parents->item;
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if (!parse_commit(commit) && !(commit->object.flags & mark)) {
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commit->object.flags |= mark;
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commit_list_insert_by_date(commit, list);
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}
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parents = parents->next;
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}
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return ret;
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}
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static void clear_commit_marks_1(struct commit_list **plist,
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struct commit *commit, unsigned int mark)
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{
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while (commit) {
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struct commit_list *parents;
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if (!(mark & commit->object.flags))
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return;
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commit->object.flags &= ~mark;
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parents = commit->parents;
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if (!parents)
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return;
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while ((parents = parents->next))
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commit_list_insert(parents->item, plist);
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commit = commit->parents->item;
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}
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}
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|
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void clear_commit_marks_many(int nr, struct commit **commit, unsigned int mark)
|
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{
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struct commit_list *list = NULL;
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while (nr--) {
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commit_list_insert(*commit, &list);
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commit++;
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}
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while (list)
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clear_commit_marks_1(&list, pop_commit(&list), mark);
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}
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|
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void clear_commit_marks(struct commit *commit, unsigned int mark)
|
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{
|
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clear_commit_marks_many(1, &commit, mark);
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}
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|
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void clear_commit_marks_for_object_array(struct object_array *a, unsigned mark)
|
|
{
|
|
struct object *object;
|
|
struct commit *commit;
|
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unsigned int i;
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|
|
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for (i = 0; i < a->nr; i++) {
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object = a->objects[i].item;
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commit = lookup_commit_reference_gently(object->sha1, 1);
|
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if (commit)
|
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clear_commit_marks(commit, mark);
|
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}
|
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}
|
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|
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struct commit *pop_commit(struct commit_list **stack)
|
|
{
|
|
struct commit_list *top = *stack;
|
|
struct commit *item = top ? top->item : NULL;
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|
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if (top) {
|
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*stack = top->next;
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free(top);
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}
|
|
return item;
|
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}
|
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|
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/*
|
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* Performs an in-place topological sort on the list supplied.
|
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*/
|
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void sort_in_topological_order(struct commit_list ** list, int lifo)
|
|
{
|
|
struct commit_list *next, *orig = *list;
|
|
struct commit_list *work, **insert;
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struct commit_list **pptr;
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|
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if (!orig)
|
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return;
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*list = NULL;
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|
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/* Mark them and clear the indegree */
|
|
for (next = orig; next; next = next->next) {
|
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struct commit *commit = next->item;
|
|
commit->indegree = 1;
|
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}
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|
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/* update the indegree */
|
|
for (next = orig; next; next = next->next) {
|
|
struct commit_list * parents = next->item->parents;
|
|
while (parents) {
|
|
struct commit *parent = parents->item;
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|
|
if (parent->indegree)
|
|
parent->indegree++;
|
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parents = parents->next;
|
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}
|
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}
|
|
|
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/*
|
|
* find the tips
|
|
*
|
|
* tips are nodes not reachable from any other node in the list
|
|
*
|
|
* the tips serve as a starting set for the work queue.
|
|
*/
|
|
work = NULL;
|
|
insert = &work;
|
|
for (next = orig; next; next = next->next) {
|
|
struct commit *commit = next->item;
|
|
|
|
if (commit->indegree == 1)
|
|
insert = &commit_list_insert(commit, insert)->next;
|
|
}
|
|
|
|
/* process the list in topological order */
|
|
if (!lifo)
|
|
commit_list_sort_by_date(&work);
|
|
|
|
pptr = list;
|
|
*list = NULL;
|
|
while (work) {
|
|
struct commit *commit;
|
|
struct commit_list *parents, *work_item;
|
|
|
|
work_item = work;
|
|
work = work_item->next;
|
|
work_item->next = NULL;
|
|
|
|
commit = work_item->item;
|
|
for (parents = commit->parents; parents ; parents = parents->next) {
|
|
struct commit *parent = parents->item;
|
|
|
|
if (!parent->indegree)
|
|
continue;
|
|
|
|
/*
|
|
* parents are only enqueued for emission
|
|
* when all their children have been emitted thereby
|
|
* guaranteeing topological order.
|
|
*/
|
|
if (--parent->indegree == 1) {
|
|
if (!lifo)
|
|
commit_list_insert_by_date(parent, &work);
|
|
else
|
|
commit_list_insert(parent, &work);
|
|
}
|
|
}
|
|
/*
|
|
* work_item is a commit all of whose children
|
|
* have already been emitted. we can emit it now.
|
|
*/
|
|
commit->indegree = 0;
|
|
*pptr = work_item;
|
|
pptr = &work_item->next;
|
|
}
|
|
}
|
|
|
|
/* merge-base stuff */
|
|
|
|
/* bits #0..15 in revision.h */
|
|
#define PARENT1 (1u<<16)
|
|
#define PARENT2 (1u<<17)
|
|
#define STALE (1u<<18)
|
|
#define RESULT (1u<<19)
|
|
|
|
static const unsigned all_flags = (PARENT1 | PARENT2 | STALE | RESULT);
|
|
|
|
static struct commit *interesting(struct commit_list *list)
|
|
{
|
|
while (list) {
|
|
struct commit *commit = list->item;
|
|
list = list->next;
|
|
if (commit->object.flags & STALE)
|
|
continue;
|
|
return commit;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* all input commits in one and twos[] must have been parsed! */
|
|
static struct commit_list *paint_down_to_common(struct commit *one, int n, struct commit **twos)
|
|
{
|
|
struct commit_list *list = NULL;
|
|
struct commit_list *result = NULL;
|
|
int i;
|
|
|
|
one->object.flags |= PARENT1;
|
|
commit_list_insert_by_date(one, &list);
|
|
if (!n)
|
|
return list;
|
|
for (i = 0; i < n; i++) {
|
|
twos[i]->object.flags |= PARENT2;
|
|
commit_list_insert_by_date(twos[i], &list);
|
|
}
|
|
|
|
while (interesting(list)) {
|
|
struct commit *commit;
|
|
struct commit_list *parents;
|
|
struct commit_list *next;
|
|
int flags;
|
|
|
|
commit = list->item;
|
|
next = list->next;
|
|
free(list);
|
|
list = next;
|
|
|
|
flags = commit->object.flags & (PARENT1 | PARENT2 | STALE);
|
|
if (flags == (PARENT1 | PARENT2)) {
|
|
if (!(commit->object.flags & RESULT)) {
|
|
commit->object.flags |= RESULT;
|
|
commit_list_insert_by_date(commit, &result);
|
|
}
|
|
/* Mark parents of a found merge stale */
|
|
flags |= STALE;
|
|
}
|
|
parents = commit->parents;
|
|
while (parents) {
|
|
struct commit *p = parents->item;
|
|
parents = parents->next;
|
|
if ((p->object.flags & flags) == flags)
|
|
continue;
|
|
if (parse_commit(p))
|
|
return NULL;
|
|
p->object.flags |= flags;
|
|
commit_list_insert_by_date(p, &list);
|
|
}
|
|
}
|
|
|
|
free_commit_list(list);
|
|
return result;
|
|
}
|
|
|
|
static struct commit_list *merge_bases_many(struct commit *one, int n, struct commit **twos)
|
|
{
|
|
struct commit_list *list = NULL;
|
|
struct commit_list *result = NULL;
|
|
int i;
|
|
|
|
for (i = 0; i < n; i++) {
|
|
if (one == twos[i])
|
|
/*
|
|
* We do not mark this even with RESULT so we do not
|
|
* have to clean it up.
|
|
*/
|
|
return commit_list_insert(one, &result);
|
|
}
|
|
|
|
if (parse_commit(one))
|
|
return NULL;
|
|
for (i = 0; i < n; i++) {
|
|
if (parse_commit(twos[i]))
|
|
return NULL;
|
|
}
|
|
|
|
list = paint_down_to_common(one, n, twos);
|
|
|
|
while (list) {
|
|
struct commit_list *next = list->next;
|
|
if (!(list->item->object.flags & STALE))
|
|
commit_list_insert_by_date(list->item, &result);
|
|
free(list);
|
|
list = next;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
struct commit_list *get_octopus_merge_bases(struct commit_list *in)
|
|
{
|
|
struct commit_list *i, *j, *k, *ret = NULL;
|
|
struct commit_list **pptr = &ret;
|
|
|
|
for (i = in; i; i = i->next) {
|
|
if (!ret)
|
|
pptr = &commit_list_insert(i->item, pptr)->next;
|
|
else {
|
|
struct commit_list *new = NULL, *end = NULL;
|
|
|
|
for (j = ret; j; j = j->next) {
|
|
struct commit_list *bases;
|
|
bases = get_merge_bases(i->item, j->item, 1);
|
|
if (!new)
|
|
new = bases;
|
|
else
|
|
end->next = bases;
|
|
for (k = bases; k; k = k->next)
|
|
end = k;
|
|
}
|
|
ret = new;
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int remove_redundant(struct commit **array, int cnt)
|
|
{
|
|
/*
|
|
* Some commit in the array may be an ancestor of
|
|
* another commit. Move such commit to the end of
|
|
* the array, and return the number of commits that
|
|
* are independent from each other.
|
|
*/
|
|
struct commit **work;
|
|
unsigned char *redundant;
|
|
int *filled_index;
|
|
int i, j, filled;
|
|
|
|
work = xcalloc(cnt, sizeof(*work));
|
|
redundant = xcalloc(cnt, 1);
|
|
filled_index = xmalloc(sizeof(*filled_index) * (cnt - 1));
|
|
|
|
for (i = 0; i < cnt; i++)
|
|
parse_commit(array[i]);
|
|
for (i = 0; i < cnt; i++) {
|
|
struct commit_list *common;
|
|
|
|
if (redundant[i])
|
|
continue;
|
|
for (j = filled = 0; j < cnt; j++) {
|
|
if (i == j || redundant[j])
|
|
continue;
|
|
filled_index[filled] = j;
|
|
work[filled++] = array[j];
|
|
}
|
|
common = paint_down_to_common(array[i], filled, work);
|
|
if (array[i]->object.flags & PARENT2)
|
|
redundant[i] = 1;
|
|
for (j = 0; j < filled; j++)
|
|
if (work[j]->object.flags & PARENT1)
|
|
redundant[filled_index[j]] = 1;
|
|
clear_commit_marks(array[i], all_flags);
|
|
for (j = 0; j < filled; j++)
|
|
clear_commit_marks(work[j], all_flags);
|
|
free_commit_list(common);
|
|
}
|
|
|
|
/* Now collect the result */
|
|
memcpy(work, array, sizeof(*array) * cnt);
|
|
for (i = filled = 0; i < cnt; i++)
|
|
if (!redundant[i])
|
|
array[filled++] = work[i];
|
|
for (j = filled, i = 0; i < cnt; i++)
|
|
if (redundant[i])
|
|
array[j++] = work[i];
|
|
free(work);
|
|
free(redundant);
|
|
free(filled_index);
|
|
return filled;
|
|
}
|
|
|
|
struct commit_list *get_merge_bases_many(struct commit *one,
|
|
int n,
|
|
struct commit **twos,
|
|
int cleanup)
|
|
{
|
|
struct commit_list *list;
|
|
struct commit **rslt;
|
|
struct commit_list *result;
|
|
int cnt, i;
|
|
|
|
result = merge_bases_many(one, n, twos);
|
|
for (i = 0; i < n; i++) {
|
|
if (one == twos[i])
|
|
return result;
|
|
}
|
|
if (!result || !result->next) {
|
|
if (cleanup) {
|
|
clear_commit_marks(one, all_flags);
|
|
clear_commit_marks_many(n, twos, all_flags);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/* There are more than one */
|
|
cnt = 0;
|
|
list = result;
|
|
while (list) {
|
|
list = list->next;
|
|
cnt++;
|
|
}
|
|
rslt = xcalloc(cnt, sizeof(*rslt));
|
|
for (list = result, i = 0; list; list = list->next)
|
|
rslt[i++] = list->item;
|
|
free_commit_list(result);
|
|
|
|
clear_commit_marks(one, all_flags);
|
|
clear_commit_marks_many(n, twos, all_flags);
|
|
|
|
cnt = remove_redundant(rslt, cnt);
|
|
result = NULL;
|
|
for (i = 0; i < cnt; i++)
|
|
commit_list_insert_by_date(rslt[i], &result);
|
|
free(rslt);
|
|
return result;
|
|
}
|
|
|
|
struct commit_list *get_merge_bases(struct commit *one, struct commit *two,
|
|
int cleanup)
|
|
{
|
|
return get_merge_bases_many(one, 1, &two, cleanup);
|
|
}
|
|
|
|
/*
|
|
* Is "commit" a descendant of one of the elements on the "with_commit" list?
|
|
*/
|
|
int is_descendant_of(struct commit *commit, struct commit_list *with_commit)
|
|
{
|
|
if (!with_commit)
|
|
return 1;
|
|
while (with_commit) {
|
|
struct commit *other;
|
|
|
|
other = with_commit->item;
|
|
with_commit = with_commit->next;
|
|
if (in_merge_bases(other, commit))
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Is "commit" an ancestor of one of the "references"?
|
|
*/
|
|
int in_merge_bases_many(struct commit *commit, int nr_reference, struct commit **reference)
|
|
{
|
|
struct commit_list *bases;
|
|
int ret = 0, i;
|
|
|
|
if (parse_commit(commit))
|
|
return ret;
|
|
for (i = 0; i < nr_reference; i++)
|
|
if (parse_commit(reference[i]))
|
|
return ret;
|
|
|
|
bases = paint_down_to_common(commit, nr_reference, reference);
|
|
if (commit->object.flags & PARENT2)
|
|
ret = 1;
|
|
clear_commit_marks(commit, all_flags);
|
|
clear_commit_marks_many(nr_reference, reference, all_flags);
|
|
free_commit_list(bases);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Is "commit" an ancestor of (i.e. reachable from) the "reference"?
|
|
*/
|
|
int in_merge_bases(struct commit *commit, struct commit *reference)
|
|
{
|
|
return in_merge_bases_many(commit, 1, &reference);
|
|
}
|
|
|
|
struct commit_list *reduce_heads(struct commit_list *heads)
|
|
{
|
|
struct commit_list *p;
|
|
struct commit_list *result = NULL, **tail = &result;
|
|
struct commit **array;
|
|
int num_head, i;
|
|
|
|
if (!heads)
|
|
return NULL;
|
|
|
|
/* Uniquify */
|
|
for (p = heads; p; p = p->next)
|
|
p->item->object.flags &= ~STALE;
|
|
for (p = heads, num_head = 0; p; p = p->next) {
|
|
if (p->item->object.flags & STALE)
|
|
continue;
|
|
p->item->object.flags |= STALE;
|
|
num_head++;
|
|
}
|
|
array = xcalloc(sizeof(*array), num_head);
|
|
for (p = heads, i = 0; p; p = p->next) {
|
|
if (p->item->object.flags & STALE) {
|
|
array[i++] = p->item;
|
|
p->item->object.flags &= ~STALE;
|
|
}
|
|
}
|
|
num_head = remove_redundant(array, num_head);
|
|
for (i = 0; i < num_head; i++)
|
|
tail = &commit_list_insert(array[i], tail)->next;
|
|
return result;
|
|
}
|
|
|
|
static const char gpg_sig_header[] = "gpgsig";
|
|
static const int gpg_sig_header_len = sizeof(gpg_sig_header) - 1;
|
|
|
|
static int do_sign_commit(struct strbuf *buf, const char *keyid)
|
|
{
|
|
struct strbuf sig = STRBUF_INIT;
|
|
int inspos, copypos;
|
|
|
|
/* find the end of the header */
|
|
inspos = strstr(buf->buf, "\n\n") - buf->buf + 1;
|
|
|
|
if (!keyid || !*keyid)
|
|
keyid = get_signing_key();
|
|
if (sign_buffer(buf, &sig, keyid)) {
|
|
strbuf_release(&sig);
|
|
return -1;
|
|
}
|
|
|
|
for (copypos = 0; sig.buf[copypos]; ) {
|
|
const char *bol = sig.buf + copypos;
|
|
const char *eol = strchrnul(bol, '\n');
|
|
int len = (eol - bol) + !!*eol;
|
|
|
|
if (!copypos) {
|
|
strbuf_insert(buf, inspos, gpg_sig_header, gpg_sig_header_len);
|
|
inspos += gpg_sig_header_len;
|
|
}
|
|
strbuf_insert(buf, inspos++, " ", 1);
|
|
strbuf_insert(buf, inspos, bol, len);
|
|
inspos += len;
|
|
copypos += len;
|
|
}
|
|
strbuf_release(&sig);
|
|
return 0;
|
|
}
|
|
|
|
int parse_signed_commit(const unsigned char *sha1,
|
|
struct strbuf *payload, struct strbuf *signature)
|
|
{
|
|
unsigned long size;
|
|
enum object_type type;
|
|
char *buffer = read_sha1_file(sha1, &type, &size);
|
|
int in_signature, saw_signature = -1;
|
|
char *line, *tail;
|
|
|
|
if (!buffer || type != OBJ_COMMIT)
|
|
goto cleanup;
|
|
|
|
line = buffer;
|
|
tail = buffer + size;
|
|
in_signature = 0;
|
|
saw_signature = 0;
|
|
while (line < tail) {
|
|
const char *sig = NULL;
|
|
char *next = memchr(line, '\n', tail - line);
|
|
|
|
next = next ? next + 1 : tail;
|
|
if (in_signature && line[0] == ' ')
|
|
sig = line + 1;
|
|
else if (!prefixcmp(line, gpg_sig_header) &&
|
|
line[gpg_sig_header_len] == ' ')
|
|
sig = line + gpg_sig_header_len + 1;
|
|
if (sig) {
|
|
strbuf_add(signature, sig, next - sig);
|
|
saw_signature = 1;
|
|
in_signature = 1;
|
|
} else {
|
|
if (*line == '\n')
|
|
/* dump the whole remainder of the buffer */
|
|
next = tail;
|
|
strbuf_add(payload, line, next - line);
|
|
in_signature = 0;
|
|
}
|
|
line = next;
|
|
}
|
|
cleanup:
|
|
free(buffer);
|
|
return saw_signature;
|
|
}
|
|
|
|
static void handle_signed_tag(struct commit *parent, struct commit_extra_header ***tail)
|
|
{
|
|
struct merge_remote_desc *desc;
|
|
struct commit_extra_header *mergetag;
|
|
char *buf;
|
|
unsigned long size, len;
|
|
enum object_type type;
|
|
|
|
desc = merge_remote_util(parent);
|
|
if (!desc || !desc->obj)
|
|
return;
|
|
buf = read_sha1_file(desc->obj->sha1, &type, &size);
|
|
if (!buf || type != OBJ_TAG)
|
|
goto free_return;
|
|
len = parse_signature(buf, size);
|
|
if (size == len)
|
|
goto free_return;
|
|
/*
|
|
* We could verify this signature and either omit the tag when
|
|
* it does not validate, but the integrator may not have the
|
|
* public key of the signer of the tag he is merging, while a
|
|
* later auditor may have it while auditing, so let's not run
|
|
* verify-signed-buffer here for now...
|
|
*
|
|
* if (verify_signed_buffer(buf, len, buf + len, size - len, ...))
|
|
* warn("warning: signed tag unverified.");
|
|
*/
|
|
mergetag = xcalloc(1, sizeof(*mergetag));
|
|
mergetag->key = xstrdup("mergetag");
|
|
mergetag->value = buf;
|
|
mergetag->len = size;
|
|
|
|
**tail = mergetag;
|
|
*tail = &mergetag->next;
|
|
return;
|
|
|
|
free_return:
|
|
free(buf);
|
|
}
|
|
|
|
static struct {
|
|
char result;
|
|
const char *check;
|
|
} sigcheck_gpg_status[] = {
|
|
{ 'G', "\n[GNUPG:] GOODSIG " },
|
|
{ 'B', "\n[GNUPG:] BADSIG " },
|
|
{ 'U', "\n[GNUPG:] TRUST_NEVER" },
|
|
{ 'U', "\n[GNUPG:] TRUST_UNDEFINED" },
|
|
};
|
|
|
|
static void parse_gpg_output(struct signature_check *sigc)
|
|
{
|
|
const char *buf = sigc->gpg_status;
|
|
int i;
|
|
|
|
/* Iterate over all search strings */
|
|
for (i = 0; i < ARRAY_SIZE(sigcheck_gpg_status); i++) {
|
|
const char *found, *next;
|
|
|
|
if (!prefixcmp(buf, sigcheck_gpg_status[i].check + 1)) {
|
|
/* At the very beginning of the buffer */
|
|
found = buf + strlen(sigcheck_gpg_status[i].check + 1);
|
|
} else {
|
|
found = strstr(buf, sigcheck_gpg_status[i].check);
|
|
if (!found)
|
|
continue;
|
|
found += strlen(sigcheck_gpg_status[i].check);
|
|
}
|
|
sigc->result = sigcheck_gpg_status[i].result;
|
|
/* The trust messages are not followed by key/signer information */
|
|
if (sigc->result != 'U') {
|
|
sigc->key = xmemdupz(found, 16);
|
|
found += 17;
|
|
next = strchrnul(found, '\n');
|
|
sigc->signer = xmemdupz(found, next - found);
|
|
}
|
|
}
|
|
}
|
|
|
|
void check_commit_signature(const struct commit* commit, struct signature_check *sigc)
|
|
{
|
|
struct strbuf payload = STRBUF_INIT;
|
|
struct strbuf signature = STRBUF_INIT;
|
|
struct strbuf gpg_output = STRBUF_INIT;
|
|
struct strbuf gpg_status = STRBUF_INIT;
|
|
int status;
|
|
|
|
sigc->result = 'N';
|
|
|
|
if (parse_signed_commit(commit->object.sha1,
|
|
&payload, &signature) <= 0)
|
|
goto out;
|
|
status = verify_signed_buffer(payload.buf, payload.len,
|
|
signature.buf, signature.len,
|
|
&gpg_output, &gpg_status);
|
|
if (status && !gpg_output.len)
|
|
goto out;
|
|
sigc->gpg_output = strbuf_detach(&gpg_output, NULL);
|
|
sigc->gpg_status = strbuf_detach(&gpg_status, NULL);
|
|
parse_gpg_output(sigc);
|
|
|
|
out:
|
|
strbuf_release(&gpg_status);
|
|
strbuf_release(&gpg_output);
|
|
strbuf_release(&payload);
|
|
strbuf_release(&signature);
|
|
}
|
|
|
|
|
|
|
|
void append_merge_tag_headers(struct commit_list *parents,
|
|
struct commit_extra_header ***tail)
|
|
{
|
|
while (parents) {
|
|
struct commit *parent = parents->item;
|
|
handle_signed_tag(parent, tail);
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|
parents = parents->next;
|
|
}
|
|
}
|
|
|
|
static void add_extra_header(struct strbuf *buffer,
|
|
struct commit_extra_header *extra)
|
|
{
|
|
strbuf_addstr(buffer, extra->key);
|
|
if (extra->len)
|
|
strbuf_add_lines(buffer, " ", extra->value, extra->len);
|
|
else
|
|
strbuf_addch(buffer, '\n');
|
|
}
|
|
|
|
struct commit_extra_header *read_commit_extra_headers(struct commit *commit,
|
|
const char **exclude)
|
|
{
|
|
struct commit_extra_header *extra = NULL;
|
|
unsigned long size;
|
|
enum object_type type;
|
|
char *buffer = read_sha1_file(commit->object.sha1, &type, &size);
|
|
if (buffer && type == OBJ_COMMIT)
|
|
extra = read_commit_extra_header_lines(buffer, size, exclude);
|
|
free(buffer);
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|
return extra;
|
|
}
|
|
|
|
static inline int standard_header_field(const char *field, size_t len)
|
|
{
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|
return ((len == 4 && !memcmp(field, "tree ", 5)) ||
|
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(len == 6 && !memcmp(field, "parent ", 7)) ||
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|
(len == 6 && !memcmp(field, "author ", 7)) ||
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(len == 9 && !memcmp(field, "committer ", 10)) ||
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(len == 8 && !memcmp(field, "encoding ", 9)));
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|
}
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|
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static int excluded_header_field(const char *field, size_t len, const char **exclude)
|
|
{
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|
if (!exclude)
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|
return 0;
|
|
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|
while (*exclude) {
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|
size_t xlen = strlen(*exclude);
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|
if (len == xlen &&
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!memcmp(field, *exclude, xlen) && field[xlen] == ' ')
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|
return 1;
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|
exclude++;
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|
}
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|
return 0;
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|
}
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|
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|
static struct commit_extra_header *read_commit_extra_header_lines(
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|
const char *buffer, size_t size,
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|
const char **exclude)
|
|
{
|
|
struct commit_extra_header *extra = NULL, **tail = &extra, *it = NULL;
|
|
const char *line, *next, *eof, *eob;
|
|
struct strbuf buf = STRBUF_INIT;
|
|
|
|
for (line = buffer, eob = line + size;
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|
line < eob && *line != '\n';
|
|
line = next) {
|
|
next = memchr(line, '\n', eob - line);
|
|
next = next ? next + 1 : eob;
|
|
if (*line == ' ') {
|
|
/* continuation */
|
|
if (it)
|
|
strbuf_add(&buf, line + 1, next - (line + 1));
|
|
continue;
|
|
}
|
|
if (it)
|
|
it->value = strbuf_detach(&buf, &it->len);
|
|
strbuf_reset(&buf);
|
|
it = NULL;
|
|
|
|
eof = strchr(line, ' ');
|
|
if (next <= eof)
|
|
eof = next;
|
|
|
|
if (standard_header_field(line, eof - line) ||
|
|
excluded_header_field(line, eof - line, exclude))
|
|
continue;
|
|
|
|
it = xcalloc(1, sizeof(*it));
|
|
it->key = xmemdupz(line, eof-line);
|
|
*tail = it;
|
|
tail = &it->next;
|
|
if (eof + 1 < next)
|
|
strbuf_add(&buf, eof + 1, next - (eof + 1));
|
|
}
|
|
if (it)
|
|
it->value = strbuf_detach(&buf, &it->len);
|
|
return extra;
|
|
}
|
|
|
|
void free_commit_extra_headers(struct commit_extra_header *extra)
|
|
{
|
|
while (extra) {
|
|
struct commit_extra_header *next = extra->next;
|
|
free(extra->key);
|
|
free(extra->value);
|
|
free(extra);
|
|
extra = next;
|
|
}
|
|
}
|
|
|
|
int commit_tree(const struct strbuf *msg, unsigned char *tree,
|
|
struct commit_list *parents, unsigned char *ret,
|
|
const char *author, const char *sign_commit)
|
|
{
|
|
struct commit_extra_header *extra = NULL, **tail = &extra;
|
|
int result;
|
|
|
|
append_merge_tag_headers(parents, &tail);
|
|
result = commit_tree_extended(msg, tree, parents, ret,
|
|
author, sign_commit, extra);
|
|
free_commit_extra_headers(extra);
|
|
return result;
|
|
}
|
|
|
|
static int find_invalid_utf8(const char *buf, int len)
|
|
{
|
|
int offset = 0;
|
|
|
|
while (len) {
|
|
unsigned char c = *buf++;
|
|
int bytes, bad_offset;
|
|
|
|
len--;
|
|
offset++;
|
|
|
|
/* Simple US-ASCII? No worries. */
|
|
if (c < 0x80)
|
|
continue;
|
|
|
|
bad_offset = offset-1;
|
|
|
|
/*
|
|
* Count how many more high bits set: that's how
|
|
* many more bytes this sequence should have.
|
|
*/
|
|
bytes = 0;
|
|
while (c & 0x40) {
|
|
c <<= 1;
|
|
bytes++;
|
|
}
|
|
|
|
/* Must be between 1 and 5 more bytes */
|
|
if (bytes < 1 || bytes > 5)
|
|
return bad_offset;
|
|
|
|
/* Do we *have* that many bytes? */
|
|
if (len < bytes)
|
|
return bad_offset;
|
|
|
|
offset += bytes;
|
|
len -= bytes;
|
|
|
|
/* And verify that they are good continuation bytes */
|
|
do {
|
|
if ((*buf++ & 0xc0) != 0x80)
|
|
return bad_offset;
|
|
} while (--bytes);
|
|
|
|
/* We could/should check the value and length here too */
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* This verifies that the buffer is in proper utf8 format.
|
|
*
|
|
* If it isn't, it assumes any non-utf8 characters are Latin1,
|
|
* and does the conversion.
|
|
*
|
|
* Fixme: we should probably also disallow overlong forms and
|
|
* invalid characters. But we don't do that currently.
|
|
*/
|
|
static int verify_utf8(struct strbuf *buf)
|
|
{
|
|
int ok = 1;
|
|
long pos = 0;
|
|
|
|
for (;;) {
|
|
int bad;
|
|
unsigned char c;
|
|
unsigned char replace[2];
|
|
|
|
bad = find_invalid_utf8(buf->buf + pos, buf->len - pos);
|
|
if (bad < 0)
|
|
return ok;
|
|
pos += bad;
|
|
ok = 0;
|
|
c = buf->buf[pos];
|
|
strbuf_remove(buf, pos, 1);
|
|
|
|
/* We know 'c' must be in the range 128-255 */
|
|
replace[0] = 0xc0 + (c >> 6);
|
|
replace[1] = 0x80 + (c & 0x3f);
|
|
strbuf_insert(buf, pos, replace, 2);
|
|
pos += 2;
|
|
}
|
|
}
|
|
|
|
static const char commit_utf8_warn[] =
|
|
"Warning: commit message did not conform to UTF-8.\n"
|
|
"You may want to amend it after fixing the message, or set the config\n"
|
|
"variable i18n.commitencoding to the encoding your project uses.\n";
|
|
|
|
int commit_tree_extended(const struct strbuf *msg, unsigned char *tree,
|
|
struct commit_list *parents, unsigned char *ret,
|
|
const char *author, const char *sign_commit,
|
|
struct commit_extra_header *extra)
|
|
{
|
|
int result;
|
|
int encoding_is_utf8;
|
|
struct strbuf buffer;
|
|
|
|
assert_sha1_type(tree, OBJ_TREE);
|
|
|
|
if (memchr(msg->buf, '\0', msg->len))
|
|
return error("a NUL byte in commit log message not allowed.");
|
|
|
|
/* Not having i18n.commitencoding is the same as having utf-8 */
|
|
encoding_is_utf8 = is_encoding_utf8(git_commit_encoding);
|
|
|
|
strbuf_init(&buffer, 8192); /* should avoid reallocs for the headers */
|
|
strbuf_addf(&buffer, "tree %s\n", sha1_to_hex(tree));
|
|
|
|
/*
|
|
* NOTE! This ordering means that the same exact tree merged with a
|
|
* different order of parents will be a _different_ changeset even
|
|
* if everything else stays the same.
|
|
*/
|
|
while (parents) {
|
|
struct commit_list *next = parents->next;
|
|
struct commit *parent = parents->item;
|
|
|
|
strbuf_addf(&buffer, "parent %s\n",
|
|
sha1_to_hex(parent->object.sha1));
|
|
free(parents);
|
|
parents = next;
|
|
}
|
|
|
|
/* Person/date information */
|
|
if (!author)
|
|
author = git_author_info(IDENT_STRICT);
|
|
strbuf_addf(&buffer, "author %s\n", author);
|
|
strbuf_addf(&buffer, "committer %s\n", git_committer_info(IDENT_STRICT));
|
|
if (!encoding_is_utf8)
|
|
strbuf_addf(&buffer, "encoding %s\n", git_commit_encoding);
|
|
|
|
while (extra) {
|
|
add_extra_header(&buffer, extra);
|
|
extra = extra->next;
|
|
}
|
|
strbuf_addch(&buffer, '\n');
|
|
|
|
/* And add the comment */
|
|
strbuf_addbuf(&buffer, msg);
|
|
|
|
/* And check the encoding */
|
|
if (encoding_is_utf8 && !verify_utf8(&buffer))
|
|
fprintf(stderr, commit_utf8_warn);
|
|
|
|
if (sign_commit && do_sign_commit(&buffer, sign_commit))
|
|
return -1;
|
|
|
|
result = write_sha1_file(buffer.buf, buffer.len, commit_type, ret);
|
|
strbuf_release(&buffer);
|
|
return result;
|
|
}
|
|
|
|
struct commit *get_merge_parent(const char *name)
|
|
{
|
|
struct object *obj;
|
|
struct commit *commit;
|
|
unsigned char sha1[20];
|
|
if (get_sha1(name, sha1))
|
|
return NULL;
|
|
obj = parse_object(sha1);
|
|
commit = (struct commit *)peel_to_type(name, 0, obj, OBJ_COMMIT);
|
|
if (commit && !commit->util) {
|
|
struct merge_remote_desc *desc;
|
|
desc = xmalloc(sizeof(*desc));
|
|
desc->obj = obj;
|
|
desc->name = strdup(name);
|
|
commit->util = desc;
|
|
}
|
|
return commit;
|
|
}
|
|
|
|
/*
|
|
* Append a commit to the end of the commit_list.
|
|
*
|
|
* next starts by pointing to the variable that holds the head of an
|
|
* empty commit_list, and is updated to point to the "next" field of
|
|
* the last item on the list as new commits are appended.
|
|
*
|
|
* Usage example:
|
|
*
|
|
* struct commit_list *list;
|
|
* struct commit_list **next = &list;
|
|
*
|
|
* next = commit_list_append(c1, next);
|
|
* next = commit_list_append(c2, next);
|
|
* assert(commit_list_count(list) == 2);
|
|
* return list;
|
|
*/
|
|
struct commit_list **commit_list_append(struct commit *commit,
|
|
struct commit_list **next)
|
|
{
|
|
struct commit_list *new = xmalloc(sizeof(struct commit_list));
|
|
new->item = commit;
|
|
*next = new;
|
|
new->next = NULL;
|
|
return &new->next;
|
|
}
|
|
|
|
void print_commit_list(struct commit_list *list,
|
|
const char *format_cur,
|
|
const char *format_last)
|
|
{
|
|
for ( ; list; list = list->next) {
|
|
const char *format = list->next ? format_cur : format_last;
|
|
printf(format, sha1_to_hex(list->item->object.sha1));
|
|
}
|
|
}
|