builtin/commit-tree.c

   1 /*
   2  * GIT - The information manager from hell
   3  *
   4  * Copyright (C) Linus Torvalds, 2005
   5  */
   6 #include "cache.h"
   7 #include "commit.h"
   8 #include "tree.h"
   9 #include "builtin.h"
  10 #include "utf8.h"
  11
  12 static const char commit_tree_usage[] = "git commit-tree <sha1> [(-p <sha1>)...] < changelog";
  13
  14 static void new_parent(struct commit *parent, struct commit_list **parents_p)
  15 {
  16         unsigned char *sha1 = parent->object.sha1;
  17         struct commit_list *parents;
  18         for (parents = *parents_p; parents; parents = parents->next) {
  19                 if (parents->item == parent) {
  20                         error("duplicate parent %s ignored", sha1_to_hex(sha1));
  21                         return;
  22                 }
  23                 parents_p = &parents->next;
  24         }
  25         commit_list_insert(parent, parents_p);
  26 }
  27
  28 int cmd_commit_tree(int argc, const char **argv, const char *prefix)
  29 {
  30         int i, got_tree = 0;
  31         struct commit_list *parents = NULL;
  32         unsigned char tree_sha1[20];
  33         unsigned char commit_sha1[20];
  34         struct strbuf buffer = STRBUF_INIT;
  35
  36         git_config(git_default_config, NULL);
  37
  38         if (argc < 2 || !strcmp(argv[1], "-h"))
  39                 usage(commit_tree_usage);
  40
  41         for (i = 1; i < argc; i++) {
  42                 const char *arg = argv[i];
  43                 if (!strcmp(arg, "-p")) {
  44                         unsigned char sha1[20];
  45                         if (argc <= ++i)
  46                                 usage(commit_tree_usage);
  47                         if (get_sha1(argv[i], sha1))
  48                                 die("Not a valid object name %s", argv[i]);
  49                         assert_sha1_type(sha1, OBJ_COMMIT);
  50                         new_parent(lookup_commit(sha1), &parents);
  51                         continue;
  52                 }
  53
  54                 if (get_sha1(arg, tree_sha1))
  55                         die("Not a valid object name %s", arg);
  56                 if (got_tree)
  57                         die("Cannot give more than one trees");
  58                 got_tree = 1;
  59         }
  60
  61         if (strbuf_read(&buffer, 0, 0) < 0)
  62                 die_errno("git commit-tree: failed to read");
  63
  64         if (commit_tree(buffer.buf, tree_sha1, parents, commit_sha1, NULL)) {
  65                 strbuf_release(&buffer);
  66                 return 1;
  67         }
  68
  69         printf("%s\n", sha1_to_hex(commit_sha1));
  70         strbuf_release(&buffer);
  71         return 0;
  72 }