[PATCH 11/16] Add ls command

["Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>]

The command is supposed to be git variant of UNIX ls. Currently
it's just a stripped down version of ls-files with some porcelain touch:

 - auto refreshing index
 - setup standard excludes

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 .gitignore         |    1 +
 Makefile           |    2 +-
 builtin.h          |    1 +
 builtin/ls-files.c |   52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 command-list.txt   |    1 +
 git.c              |    1 +
 6 files changed, 57 insertions(+), 1 deletions(-)

diff --git a/.gitignore b/.gitignore
index a1a1202..c090d21 100644
--- a/.gitignore
+++ b/.gitignore
@@ -66,6 +66,7 @@
 /git-instaweb
 /git-log
 /git-lost-found
+/git-ls
 /git-ls-files
 /git-ls-remote
 /git-ls-tree
diff --git a/Makefile b/Makefile
index 0e459e4..5efbb1c 100644
--- a/Makefile
+++ b/Makefile
@@ -1958,7 +1958,7 @@ builtin/prune.o builtin/reflog.o reachable.o: reachable.h
 builtin/commit.o builtin/revert.o wt-status.o: wt-status.h
 builtin/tar-tree.o archive-tar.o: tar.h
 connect.o transport.o http-backend.o: url.h
-branch.o column.o pager.o help.o tag.o: column.h
+branch.o builtin/ls-files.o column.o pager.o help.o tag.o: column.h
 http-fetch.o http-walker.o remote-curl.o transport.o walker.o: walker.h
 http.o http-walker.o http-push.o http-fetch.o remote-curl.o: http.h url.h
 
diff --git a/builtin.h b/builtin.h
index 904e067..5aede6e 100644
--- a/builtin.h
+++ b/builtin.h
@@ -80,6 +80,7 @@ extern int cmd_index_pack(int argc, const char **argv, const char *prefix);
 extern int cmd_init_db(int argc, const char **argv, const char *prefix);
 extern int cmd_log(int argc, const char **argv, const char *prefix);
 extern int cmd_log_reflog(int argc, const char **argv, const char *prefix);
+extern int cmd_ls(int argc, const char **argv, const char *prefix);
 extern int cmd_ls_files(int argc, const char **argv, const char *prefix);
 extern int cmd_ls_tree(int argc, const char **argv, const char *prefix);
 extern int cmd_ls_remote(int argc, const char **argv, const char *prefix);
diff --git a/builtin/ls-files.c b/builtin/ls-files.c
index fb2d5f4..cab7a10 100644
--- a/builtin/ls-files.c
+++ b/builtin/ls-files.c
@@ -619,3 +619,55 @@ int cmd_ls_files(int argc, const char **argv, const char *cmd_prefix)
 
 	return 0;
 }
+
+int cmd_ls(int argc, const char **argv, const char *cmd_prefix)
+{
+	struct dir_struct dir;
+	struct option builtin_ls_files_options[] = {
+		OPT_BOOLEAN('c', "cached", &show_cached,
+			"show cached files in the output (default)"),
+		OPT_BOOLEAN('d', "deleted", &show_deleted,
+			"show deleted files in the output"),
+		OPT_BOOLEAN('m', "modified", &show_modified,
+			"show modified files in the output"),
+		OPT_BOOLEAN('o', "others", &show_others,
+			"show other files in the output"),
+		OPT_BIT('i', "ignored", &dir.flags,
+			"show ignored files in the output",
+			DIR_SHOW_IGNORED),
+		OPT_BOOLEAN('k', "killed", &show_killed,
+			"show files on the filesystem that need to be removed"),
+		OPT_END()
+	};
+
+	if (argc == 2 && !strcmp(argv[1], "-h"))
+		usage_with_options(ls_files_usage, builtin_ls_files_options);
+
+	memset(&dir, 0, sizeof(dir));
+	prefix = cmd_prefix;
+	if (prefix)
+		prefix_len = strlen(prefix);
+	git_config(git_default_config, NULL);
+
+	if (read_cache() < 0)
+		die("index file corrupt");
+
+	argc = parse_options(argc, argv, prefix, builtin_ls_files_options,
+			ls_files_usage, 0);
+
+	if (dir.flags & DIR_SHOW_IGNORED || show_others)
+		setup_standard_excludes(&dir);
+
+	pathspec = get_pathspec(prefix, argv);
+
+	if (show_modified)
+		refresh_index(&the_index, REFRESH_QUIET, pathspec, NULL, NULL);
+
+	/* With no flags, we default to showing the cached files */
+	if (!(show_stage | show_deleted | show_others | show_unmerged |
+	      show_killed | show_modified | show_resolve_undo))
+		show_cached = 1;
+
+	show_files(&dir);
+	return 0;
+}
diff --git a/command-list.txt b/command-list.txt
index 95bf18c..15e6770 100644
--- a/command-list.txt
+++ b/command-list.txt
@@ -59,6 +59,7 @@ git-instaweb                            ancillaryinterrogators
 gitk                                    mainporcelain
 git-log                                 mainporcelain common
 git-lost-found                          ancillarymanipulators	deprecated
+git-ls                                  mainporcelain
 git-ls-files                            plumbinginterrogators
 git-ls-remote                           plumbinginterrogators
 git-ls-tree                             plumbinginterrogators
diff --git a/git.c b/git.c
index 68334f6..f8e20d2 100644
--- a/git.c
+++ b/git.c
@@ -357,6 +357,7 @@ static void handle_internal_command(int argc, const char **argv)
 		{ "init", cmd_init_db },
 		{ "init-db", cmd_init_db },
 		{ "log", cmd_log, RUN_SETUP },
+		{ "ls", cmd_ls, RUN_SETUP | NEED_WORK_TREE },
 		{ "ls-files", cmd_ls_files, RUN_SETUP },
 		{ "ls-tree", cmd_ls_tree, RUN_SETUP },
 		{ "ls-remote", cmd_ls_remote, RUN_SETUP_GENTLY },
-- 
1.7.2.2