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 make_sure_we_have_it(unsigned char *sha1)
  12 {
  13         if (has_sha1_file(sha1))
  14                 return 0;
  15         return fetch(sha1);
  16 }
  17
  18 static int process_tree(unsigned char *sha1)
  19 {
  20         struct tree *tree = lookup_tree(sha1);
  21         struct tree_entry_list *entries;
  22
  23         if (parse_tree(tree))
  24                 return -1;
  25
  26         for (entries = tree->entries; entries; entries = entries->next) {
  27                 if (make_sure_we_have_it(entries->item.tree->object.sha1))
  28                         return -1;
  29                 if (entries->directory) {
  30                         if (process_tree(entries->item.tree->object.sha1))
  31                                 return -1;
  32                 }
  33         }
  34         return 0;
  35 }
  36
  37 static int process_commit(unsigned char *sha1)
  38 {
  39         struct commit *obj = lookup_commit(sha1);
  40
  41         if (make_sure_we_have_it(sha1))
  42                 return -1;
  43
  44         if (parse_commit(obj))
  45                 return -1;
  46
  47         if (get_tree) {
  48                 if (make_sure_we_have_it(obj->tree->object.sha1))
  49                         return -1;
  50                 if (process_tree(obj->tree->object.sha1))
  51                         return -1;
  52                 if (!get_all)
  53                         get_tree = 0;
  54         }
  55         if (get_history) {
  56                 struct commit_list *parents = obj->parents;
  57                 for (; parents; parents = parents->next) {
  58                         if (has_sha1_file(parents->item->object.sha1))
  59                                 continue;
  60                         if (make_sure_we_have_it(parents->item->object.sha1)) {
  61                                 /* The server might not have it, and
  62                                  * we don't mind.
  63                                  */
  64                                 continue;
  65                         }
  66                         if (process_commit(parents->item->object.sha1))
  67                                 return -1;
  68                 }
  69         }
  70         return 0;
  71 }
  72
  73 int pull(char *target)
  74 {
  75         int retval;
  76         unsigned char sha1[20];
  77         retval = get_sha1_hex(target, sha1);
  78         if (retval)
  79                 return retval;
  80         retval = make_sure_we_have_it(sha1);
  81         if (retval)
  82                 return retval;
  83         return process_commit(sha1);
  84 }