examples/commit.c

   1 /*
   2  * libgit2 "commit" example - shows how to create a git commit
   3  *
   4  * Written by the libgit2 contributors
   5  *
   6  * To the extent possible under law, the author(s) have dedicated all copyright
   7  * and related and neighboring rights to this software to the public domain
   8  * worldwide. This software is distributed without any warranty.
   9  *
  10  * You should have received a copy of the CC0 Public Domain Dedication along
  11  * with this software. If not, see
  12  * <http://creativecommons.org/publicdomain/zero/1.0/>.
  13  */
  14
  15 #include "common.h"
  16
  17 /**
  18  * This example demonstrates the libgit2 commit APIs to roughly
  19  * simulate `git commit` with the commit message argument.
  20  *
  21  * This does not have:
  22  *
  23  * - Robust error handling
  24  * - Most of the `git commit` options
  25  *
  26  * This does have:
  27  *
  28  * - Example of performing a git commit with a comment
  29  *
  30  */
  31 int lg2_commit(git_repository *repo, int argc, char **argv)
  32 {
  33         const char *opt = argv[1];
  34         const char *comment = argv[2];
  35         int error;
  36
  37         git_oid commit_oid,tree_oid;
  38         git_tree *tree;
  39         git_index *index;
  40         git_object *parent = NULL;
  41         git_reference *ref = NULL;
  42         git_signature *signature;
  43
  44         /* Validate args */
  45         if (argc < 3 || strcmp(opt, "-m") != 0) {
  46                 printf ("USAGE: %s -m <comment>\n", argv[0]);
  47                 return -1;
  48         }
  49
  50         error = git_revparse_ext(&parent, &ref, repo, "HEAD");
  51         if (error == GIT_ENOTFOUND) {
  52                 printf("HEAD not found. Creating first commit\n");
  53                 error = 0;
  54         } else if (error != 0) {
  55                 const git_error *err = git_error_last();
  56                 if (err) printf("ERROR %d: %s\n", err->klass, err->message);
  57                 else printf("ERROR %d: no detailed info\n", error);
  58         }
  59
  60         check_lg2(git_repository_index(&index, repo), "Could not open repository index", NULL);
  61         check_lg2(git_index_write_tree(&tree_oid, index), "Could not write tree", NULL);;
  62         check_lg2(git_index_write(index), "Could not write index", NULL);;
  63
  64         check_lg2(git_tree_lookup(&tree, repo, &tree_oid), "Error looking up tree", NULL);
  65
  66         check_lg2(git_signature_default(&signature, repo), "Error creating signature", NULL);
  67
  68         check_lg2(git_commit_create_v(
  69                 &commit_oid,
  70                 repo,
  71                 "HEAD",
  72                 signature,
  73                 signature,
  74                 NULL,
  75                 comment,
  76                 tree,
  77                 parent ? 1 : 0, parent), "Error creating commit", NULL);
  78
  79         git_index_free(index);
  80         git_signature_free(signature);
  81         git_tree_free(tree);
  82         git_object_free(parent);
  83         git_reference_free(ref);
  84
  85         return error;
  86 }