cli: add an init command

src/cli/cmd.h

@@ -32,5 +32,6 @@ extern int cmd_config(int argc, char **argv);
 extern int cmd_hash_object(int argc, char **argv);
 extern int cmd_help(int argc, char **argv);
 extern int cmd_index_pack(int argc, char **argv);
+extern int cmd_init(int argc, char **argv);
 
 #endif /* CLI_cmd_h__ */

src/cli/cmd_init.c

@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include <stdio.h>
+#include <git2.h>
+#include "common.h"
+#include "cmd.h"
+#include "error.h"
+#include "sighandler.h"
+#include "progress.h"
+
+#include "fs_path.h"
+#include "futils.h"
+
+#define COMMAND_NAME "init"
+
+static char *branch, *git_dir, *template_dir, *path;
+static int quiet, bare;
+
+static const cli_opt_spec opts[] = {
+	CLI_COMMON_OPT,
+
+	{ CLI_OPT_TYPE_SWITCH,    "quiet",           'q', &quiet,       1,
+	  CLI_OPT_USAGE_DEFAULT,   NULL,             "quiet mode; don't display informational messages" },
+	{ CLI_OPT_TYPE_SWITCH,    "bare",             0,  &bare,        1,
+	  CLI_OPT_USAGE_DEFAULT,   NULL,             "don't create a working directory" },
+	{ CLI_OPT_TYPE_VALUE,     "initial-branch",  'b', &branch,      0,
+	  CLI_OPT_USAGE_DEFAULT,  "name",            "initial branch name" },
+	{ CLI_OPT_TYPE_VALUE,     "separate-git-dir", 0, &git_dir,      0,
+	  CLI_OPT_USAGE_DEFAULT,  "git-dir",         "path to separate git directory" },
+	{ CLI_OPT_TYPE_VALUE,     "template",         0, &template_dir, 0,
+	  CLI_OPT_USAGE_DEFAULT,  "template-dir",    "path to git directory templates" },
+	{ CLI_OPT_TYPE_LITERAL },
+	{ CLI_OPT_TYPE_ARG,       "directory",        0,  &path,        0,
+	  CLI_OPT_USAGE_DEFAULT,  "directory",       "directory to create repository in" },
+	{ 0 }
+};
+
+static void print_help(void)
+{
+	cli_opt_usage_fprint(stdout, PROGRAM_NAME, COMMAND_NAME, opts, 0);
+	printf("\n");
+
+	printf("Create a new git repository.\n");
+	printf("\n");
+
+	printf("Options:\n");
+
+	cli_opt_help_fprint(stdout, opts);
+}
+
+int cmd_init(int argc, char **argv)
+{
+	git_repository *repo = NULL;
+	git_repository_init_options init_opts = GIT_REPOSITORY_INIT_OPTIONS_INIT;
+	cli_opt invalid_opt;
+	const char *repo_path;
+	int ret = 0;
+
+	if (cli_opt_parse(&invalid_opt, opts, argv + 1, argc - 1, CLI_OPT_PARSE_GNU))
+		return cli_opt_usage_error(COMMAND_NAME, opts, &invalid_opt);
+
+	if (cli_opt__show_help) {
+		print_help();
+		return 0;
+	}
+
+	init_opts.flags |= GIT_REPOSITORY_INIT_MKPATH |
+	                   GIT_REPOSITORY_INIT_EXTERNAL_TEMPLATE;
+
+	if (bare && git_dir)
+		return cli_error_usage("the '--bare' and '--separate-git-dir' options cannot be used together");
+
+	if (bare)
+		init_opts.flags |= GIT_REPOSITORY_INIT_BARE;
+
+	init_opts.template_path = template_dir;
+	init_opts.initial_head = branch;
+
+	if (git_dir) {
+		init_opts.flags |= GIT_REPOSITORY_INIT_NO_DOTGIT_DIR;
+		init_opts.workdir_path = path;
+
+		repo_path = git_dir;
+	} else {
+		repo_path = path;
+	}
+
+	if (git_repository_init_ext(&repo, repo_path, &init_opts) < 0) {
+		ret = cli_error_git();
+	} else if (!quiet) {
+		printf("Initialized empty Git repository in %s\n",
+			git_repository_path(repo));
+	}
+
+	git_repository_free(repo);
+	return ret;
+}

src/cli/main.c

@@ -37,6 +37,7 @@ const cli_cmd_spec cli_cmds[] = {
 	{ "hash-object", cmd_hash_object, "Hash a raw object and product its object ID" },
 	{ "help",        cmd_help,        "Display help information" },
 	{ "index-pack",  cmd_index_pack,  "Create an index for a packfile" },
+	{ "init",        cmd_init,        "Create a new git repository" },
 	{ NULL }
 };