mirror of
https://github.com/git/git.git
synced 2024-11-30 21:44:02 +08:00
144 lines
3.4 KiB
C
144 lines
3.4 KiB
C
#include "cache.h"
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#include "commit.h"
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#include "tag.h"
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static int is_shallow = -1;
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static struct stat shallow_stat;
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static char *alternate_shallow_file;
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void set_alternate_shallow_file(const char *path)
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{
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if (is_shallow != -1)
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die("BUG: is_repository_shallow must not be called before set_alternate_shallow_file");
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free(alternate_shallow_file);
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alternate_shallow_file = path ? xstrdup(path) : NULL;
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}
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int register_shallow(const unsigned char *sha1)
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{
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struct commit_graft *graft =
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xmalloc(sizeof(struct commit_graft));
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struct commit *commit = lookup_commit(sha1);
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hashcpy(graft->sha1, sha1);
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graft->nr_parent = -1;
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if (commit && commit->object.parsed)
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commit->parents = NULL;
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return register_commit_graft(graft, 0);
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}
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int is_repository_shallow(void)
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{
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FILE *fp;
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char buf[1024];
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const char *path = alternate_shallow_file;
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if (is_shallow >= 0)
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return is_shallow;
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if (!path)
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path = git_path("shallow");
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/*
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* fetch-pack sets '--shallow-file ""' as an indicator that no
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* shallow file should be used. We could just open it and it
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* will likely fail. But let's do an explicit check instead.
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*/
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if (!*path ||
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stat(path, &shallow_stat) ||
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(fp = fopen(path, "r")) == NULL) {
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is_shallow = 0;
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return is_shallow;
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}
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is_shallow = 1;
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while (fgets(buf, sizeof(buf), fp)) {
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unsigned char sha1[20];
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if (get_sha1_hex(buf, sha1))
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die("bad shallow line: %s", buf);
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register_shallow(sha1);
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}
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fclose(fp);
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return is_shallow;
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}
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struct commit_list *get_shallow_commits(struct object_array *heads, int depth,
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int shallow_flag, int not_shallow_flag)
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{
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int i = 0, cur_depth = 0;
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struct commit_list *result = NULL;
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struct object_array stack = OBJECT_ARRAY_INIT;
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struct commit *commit = NULL;
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while (commit || i < heads->nr || stack.nr) {
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struct commit_list *p;
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if (!commit) {
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if (i < heads->nr) {
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commit = (struct commit *)
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deref_tag(heads->objects[i++].item, NULL, 0);
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if (!commit || commit->object.type != OBJ_COMMIT) {
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commit = NULL;
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continue;
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}
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if (!commit->util)
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commit->util = xmalloc(sizeof(int));
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*(int *)commit->util = 0;
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cur_depth = 0;
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} else {
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commit = (struct commit *)
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stack.objects[--stack.nr].item;
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cur_depth = *(int *)commit->util;
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}
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}
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if (parse_commit(commit))
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die("invalid commit");
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cur_depth++;
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if (cur_depth >= depth) {
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commit_list_insert(commit, &result);
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commit->object.flags |= shallow_flag;
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commit = NULL;
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continue;
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}
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commit->object.flags |= not_shallow_flag;
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for (p = commit->parents, commit = NULL; p; p = p->next) {
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if (!p->item->util) {
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int *pointer = xmalloc(sizeof(int));
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p->item->util = pointer;
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*pointer = cur_depth;
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} else {
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int *pointer = p->item->util;
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if (cur_depth >= *pointer)
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continue;
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*pointer = cur_depth;
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}
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if (p->next)
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add_object_array(&p->item->object,
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NULL, &stack);
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else {
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commit = p->item;
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cur_depth = *(int *)commit->util;
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}
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}
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}
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return result;
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}
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void check_shallow_file_for_update(void)
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{
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struct stat st;
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if (!is_shallow)
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return;
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else if (is_shallow == -1)
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die("BUG: shallow must be initialized by now");
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if (stat(git_path("shallow"), &st))
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die("shallow file was removed during fetch");
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else if (st.st_mtime != shallow_stat.st_mtime
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#ifdef USE_NSEC
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|| ST_MTIME_NSEC(st) != ST_MTIME_NSEC(shallow_stat)
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#endif
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)
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die("shallow file was changed during fetch");
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}
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