pull.c

   1 #include "pull.h"
   2
   3 #include "cache.h"
   4 #include "commit.h"
   5 #include "tree.h"
   6
   7 int get_tree = 0;
   8 int get_history = 0;
   9 int get_all = 0;
  10
  11 static int process_tree(unsigned char *sha1)
  12 {
  13         struct tree *tree = lookup_tree(sha1);
  14         struct tree_entry_list *entries;
  15
  16         if (parse_tree(tree))
  17                 return -1;
  18
  19         for (entries = tree->entries; entries; entries = entries->next) {
  20                 if (fetch(entries->item.tree->object.sha1))
  21                         return -1;
  22                 if (entries->directory) {
  23                         if (process_tree(entries->item.tree->object.sha1))
  24                                 return -1;
  25                 }
  26         }
  27         return 0;
  28 }
  29
  30 static int process_commit(unsigned char *sha1)
  31 {
  32         struct commit *obj = lookup_commit(sha1);
  33
  34         if (fetch(sha1))
  35                 return -1;
  36
  37         if (parse_commit(obj))
  38                 return -1;
  39
  40         if (get_tree) {
  41                 if (fetch(obj->tree->object.sha1))
  42                         return -1;
  43                 if (process_tree(obj->tree->object.sha1))
  44                         return -1;
  45                 if (!get_all)
  46                         get_tree = 0;
  47         }
  48         if (get_history) {
  49                 struct commit_list *parents = obj->parents;
  50                 for (; parents; parents = parents->next) {
  51                         if (has_sha1_file(parents->item->object.sha1))
  52                                 continue;
  53                         if (fetch(parents->item->object.sha1)) {
  54                                 /* The server might not have it, and
  55                                  * we don't mind.
  56                                  */
  57                                 continue;
  58                         }
  59                         if (process_commit(parents->item->object.sha1))
  60                                 return -1;
  61                 }
  62         }
  63         return 0;
  64 }
  65
  66 int pull(char *target)
  67 {
  68         int retval;
  69         unsigned char sha1[20];
  70         retval = get_sha1_hex(target, sha1);
  71         if (retval)
  72                 return retval;
  73         retval = fetch(sha1);
  74         if (retval)
  75                 return retval;
  76         return process_commit(sha1);
  77 }