Andrew's git - gitweb.git/blob

   1#include "cache.h"
   2#include "commit.h"
   3#include "tag.h"
   4
   5static int is_shallow = -1;
   6
   7int register_shallow(const unsigned char *sha1)
   8{
   9        struct commit_graft *graft =
  10                xmalloc(sizeof(struct commit_graft));
  11        struct commit *commit = lookup_commit(sha1);
  12
  13        hashcpy(graft->sha1, sha1);
  14        graft->nr_parent = -1;
  15        if (commit && commit->object.parsed)
  16                commit->parents = NULL;
  17        return register_commit_graft(graft, 0);
  18}
  19
  20int is_repository_shallow(void)
  21{
  22        FILE *fp;
  23        char buf[1024];
  24
  25        if (is_shallow >= 0)
  26                return is_shallow;
  27
  28        fp = fopen(git_path("shallow"), "r");
  29        if (!fp) {
  30                is_shallow = 0;
  31                return is_shallow;
  32        }
  33        is_shallow = 1;
  34
  35        while (fgets(buf, sizeof(buf), fp)) {
  36                unsigned char sha1[20];
  37                if (get_sha1_hex(buf, sha1))
  38                        die("bad shallow line: %s", buf);
  39                register_shallow(sha1);
  40        }
  41        fclose(fp);
  42        return is_shallow;
  43}
  44
  45struct commit_list *get_shallow_commits(struct object_array *heads, int depth,
  46                int shallow_flag, int not_shallow_flag)
  47{
  48        int i = 0, cur_depth = 0;
  49        struct commit_list *result = NULL;
  50        struct object_array stack = {0, 0, NULL};
  51        struct commit *commit = NULL;
  52
  53        while (commit || i < heads->nr || stack.nr) {
  54                struct commit_list *p;
  55                if (!commit) {
  56                        if (i < heads->nr) {
  57                                commit = (struct commit *)
  58                                        deref_tag(heads->objects[i++].item, NULL, 0);
  59                                if (!commit || commit->object.type != OBJ_COMMIT) {
  60                                        commit = NULL;
  61                                        continue;
  62                                }
  63                                if (!commit->util)
  64                                        commit->util = xmalloc(sizeof(int));
  65                                *(int *)commit->util = 0;
  66                                cur_depth = 0;
  67                        } else {
  68                                commit = (struct commit *)
  69                                        stack.objects[--stack.nr].item;
  70                                cur_depth = *(int *)commit->util;
  71                        }
  72                }
  73                if (parse_commit(commit))
  74                        die("invalid commit");
  75                commit->object.flags |= not_shallow_flag;
  76                cur_depth++;
  77                for (p = commit->parents, commit = NULL; p; p = p->next) {
  78                        if (!p->item->util) {
  79                                int *pointer = xmalloc(sizeof(int));
  80                                p->item->util = pointer;
  81                                *pointer =  cur_depth;
  82                        } else {
  83                                int *pointer = p->item->util;
  84                                if (cur_depth >= *pointer)
  85                                        continue;
  86                                *pointer = cur_depth;
  87                        }
  88                        if (cur_depth < depth) {
  89                                if (p->next)
  90                                        add_object_array(&p->item->object,
  91                                                        NULL, &stack);
  92                                else {
  93                                        commit = p->item;
  94                                        cur_depth = *(int *)commit->util;
  95                                }
  96                        } else {
  97                                commit_list_insert(p->item, &result);
  98                                p->item->object.flags |= shallow_flag;
  99                        }
 100                }
 101        }
 102
 103        return result;
 104}