Function do_commit

builtin/am.c:1666–1733

* Commits the current index with state->msg as the commit message and * state->author_name, state->author_email and state->author_date as the author * information. */

 * information.
 */
static void do_commit(const struct am_state *state)
{
	struct object_id tree, parent, commit;
	const struct object_id *old_oid;
	struct commit_list *parents = NULL;
	const char *reflog_msg, *author, *committer = NULL;
	struct strbuf sb = STRBUF_INIT;

	if (!state->no_verify && run_hooks(the_repository, "pre-applypatch"))
		exit(1);

	if (write_index_as_tree(&tree, the_repository->index,
				repo_get_index_file(the_repository),
				0, NULL))
		die(_("git write-tree failed to write a tree"));

	if (!repo_get_oid_commit(the_repository, "HEAD", &parent)) {
		old_oid = &parent;
		commit_list_insert(lookup_commit(the_repository, &parent),
				   &parents);
	} else {
		old_oid = NULL;
		say(state, stderr, _("applying to an empty history"));
	}

	author = fmt_ident(state->author_name, state->author_email,
		WANT_AUTHOR_IDENT,
			state->ignore_date ? NULL : state->author_date,
			IDENT_STRICT);

	if (state->committer_date_is_author_date)
		committer = fmt_ident(getenv("GIT_COMMITTER_NAME"),
				      getenv("GIT_COMMITTER_EMAIL"),
				      WANT_COMMITTER_IDENT,
				      state->ignore_date ? NULL
							 : state->author_date,
				      IDENT_STRICT);

	if (commit_tree_extended(state->msg, state->msg_len, &tree, parents,
				 &commit, author, committer, state->sign_commit,
				 NULL))
		die(_("failed to write commit object"));

	reflog_msg = getenv("GIT_REFLOG_ACTION");
	if (!reflog_msg)
		reflog_msg = "am";

	strbuf_addf(&sb, "%s: %.*s", reflog_msg, linelen(state->msg),
			state->msg);

	refs_update_ref(get_main_ref_store(the_repository), sb.buf, "HEAD",
			&commit, old_oid, 0,
			UPDATE_REFS_DIE_ON_ERR);

	if (state->rebasing) {
		FILE *fp = xfopen(am_path(state, "rewritten"), "a");

		assert(!is_null_oid(&state->orig_commit));