Function push_to_deploy

builtin/receive-pack.c:1388–1450

}

static const char *push_to_deploy(unsigned char *sha1,
				  struct strvec *env,
				  const struct worktree *worktree)
{
	struct child_process child = CHILD_PROCESS_INIT;

	strvec_pushl(&child.args, "update-index", "-q", "--ignore-submodules",
		     "--refresh", NULL);
	strvec_pushv(&child.env, env->v);
	child.dir = worktree->path;
	child.no_stdin = 1;
	child.stdout_to_stderr = 1;
	child.git_cmd = 1;
	if (run_command(&child))
		return "Up-to-date check failed";

	/* run_command() does not clean up completely; reinitialize */
	child_process_init(&child);
	strvec_pushl(&child.args, "diff-files", "--quiet",
		     "--ignore-submodules", "--", NULL);
	strvec_pushv(&child.env, env->v);
	child.dir = worktree->path;
	child.no_stdin = 1;
	child.stdout_to_stderr = 1;
	child.git_cmd = 1;
	if (run_command(&child))
		return "Working directory has unstaged changes";

	child_process_init(&child);
	strvec_pushl(&child.args, "diff-index", "--quiet", "--cached",
		     "--ignore-submodules",
		     /*
		      * diff-index with either HEAD or an empty tree
		      *
		      * NEEDSWORK: is_null_oid() cannot know whether it's an
		      * unborn HEAD or a corrupt ref. It works for now because
		      * it's only needed to know if we are comparing HEAD or an
		      * empty tree.
		      */
		     !is_null_oid(&worktree->head_oid) ? "HEAD" :
		     empty_tree_oid_hex(the_repository->hash_algo), "--", NULL);
	strvec_pushv(&child.env, env->v);
	child.no_stdin = 1;
	child.no_stdout = 1;
	child.stdout_to_stderr = 0;
	child.git_cmd = 1;
	if (run_command(&child))
		return "Working directory has staged changes";

	child_process_init(&child);
	strvec_pushl(&child.args, "read-tree", "-u", "-m", hash_to_hex(sha1),
		     NULL);
	strvec_pushv(&child.env, env->v);
	child.dir = worktree->path;
	child.no_stdin = 1;
	child.no_stdout = 1;
	child.stdout_to_stderr = 0;
	child.git_cmd = 1;