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commit.c

/*
 * libgit2 "commit" example - shows how to create a git commit
 *
 * Written by the libgit2 contributors
 *
 * To the extent possible under law, the author(s) have dedicated all copyright
 * and related and neighboring rights to this software to the public domain
 * worldwide. This software is distributed without any warranty.
 *
 * You should have received a copy of the CC0 Public Domain Dedication along
 * with this software. If not, see
 * <http://creativecommons.org/publicdomain/zero/1.0/>.
 */

#include "common.h"

This example demonstrates the libgit2 commit APIs to roughly simulate git commit with the commit message argument.

This does not have:

  • Robust error handling
  • Most of the git commit options

This does have:

  • Example of performing a git commit with a comment
int lg2_commit(git_repository *repo, int argc, char **argv)
{
  const char *opt = argv[1];
  const char *comment = argv[2];
  int error;

  git_oid commit_oid,tree_oid;
  git_tree *tree;
  git_index *index;	
  git_object *parent = NULL;
  git_reference *ref = NULL;
  git_signature *signature;	

  /* Validate args */
  if (argc < 3 || strcmp(opt, "-m") != 0) {
    printf ("USAGE: %s -m <comment>\n", argv[0]);
    return -1;
  }

  error = git_revparse_ext(&parent, &ref, repo, "HEAD");
  if (error == GIT_ENOTFOUND) {
    printf("HEAD not found. Creating first commit\n");
    error = 0;
  } else if (error != 0) {
    const git_error *err = git_error_last();
    if (err) printf("ERROR %d: %s\n", err->klass, err->message);
    else printf("ERROR %d: no detailed info\n", error);
  }

  check_lg2(git_repository_index(&index, repo), "Could not open repository index", NULL);
  check_lg2(git_index_write_tree(&tree_oid, index), "Could not write tree", NULL);;
  check_lg2(git_index_write(index), "Could not write index", NULL);;

  check_lg2(git_tree_lookup(&tree, repo, &tree_oid), "Error looking up tree", NULL);
  
  check_lg2(git_signature_default(&signature, repo), "Error creating signature", NULL);
  
  check_lg2(git_commit_create_v(
    &commit_oid,
    repo,
    "HEAD",
    signature,
    signature,
    NULL,
    comment,
    tree,
    parent ? 1 : 0, parent), "Error creating commit", NULL);

  git_index_free(index);
  git_signature_free(signature);
  git_tree_free(tree);	

  return error;
}