[PATCH v2 10/17] Add git-ls, a user friendly version of ls-files and more

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

This is more user friendly version of ls-files:

* it's automatically colored and columnized
* it refreshes the index like all porcelain commands
* it defaults to non-recursive behavior like ls
* :(glob) is on by default so '*.c' means a.c but not a/b.c, use
  '**/*.c' for that.
* auto pager

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 .gitignore                     |  1 +
 Documentation/config.txt       | 10 ++++++
 Documentation/git-ls.txt (new) | 82 ++++++++++++++++++++++++++++++++++++++++++
 Makefile                       |  1 +
 builtin.h                      |  1 +
 builtin/ls-files.c             | 70 ++++++++++++++++++++++++++++++++++++
 command-list.txt               |  1 +
 git.c                          |  1 +
 8 files changed, 167 insertions(+)
 create mode 100644 Documentation/git-ls.txt

diff --git a/.gitignore b/.gitignore
index dc600f9..f91af81 100644
--- a/.gitignore
+++ b/.gitignore
@@ -76,6 +76,7 @@
 /git-init-db
 /git-instaweb
 /git-log
+/git-ls
 /git-ls-files
 /git-ls-remote
 /git-ls-tree
diff --git a/Documentation/config.txt b/Documentation/config.txt
index 6bca55e..87a6dcf 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -909,6 +909,12 @@ color.status.<slot>::
 	to red). The values of these variables may be specified as in
 	color.branch.<slot>.
 
+color.ls::
+	A boolean to enable/disable color in the output of
+	linkgit:git-ls[1]. May be set to `always`, `false` (or
+	`never`) or `auto` (or `true`), in which case colors are used
+	only when the output is to a terminal. Defaults to false.
+
 color.ls.<slot>::
 	Use customized color for file name colorization. If not set
 	and the environment variable LS_COLORS is set, color settings
@@ -981,6 +987,10 @@ column.clean::
 	Specify the layout when list items in `git clean -i`, which always
 	shows files and directories in columns. See `column.ui` for details.
 
+column.ls::
+	Specify whether to output tag listing in `git ls` in columns.
+	See `column.ui` for details.
+
 column.status::
 	Specify whether to output untracked files in `git status` in columns.
 	See `column.ui` for details.
diff --git a/Documentation/git-ls.txt b/Documentation/git-ls.txt
new file mode 100644
index 0000000..67ca522
--- /dev/null
+++ b/Documentation/git-ls.txt
@@ -0,0 +1,82 @@
+git-ls(1)
+===============
+
+NAME
+----
+git-ls - List files
+
+SYNOPSIS
+--------
+[verse]
+'git ls' (--[cached|deleted|others|ignored|unmerged|modified])*
+	(-[c|d|o|i|s|u|m])*
+	[options] [<pathspec>...]
+
+DESCRIPTION
+-----------
+List files (by default in current working directory) that are in the
+index. Depending on the chosen options, maybe only modified files in
+working tree are shown, or untracked files...
+
+OPTIONS
+-------
+-c::
+--cached::
+	Show cached files in the output (default)
+
+-d::
+--deleted::
+	Show deleted files in the output
+
+-m::
+--modified::
+	Show modified files in the output
+
+-o::
+--others::
+	Show other (i.e. untracked) files in the output
+
+-i::
+--ignored::
+	Show only ignored files in the output. When showing files in the
+	index, print only those matched by an exclude pattern. When
+	showing "other" files, show only those matched by an exclude
+	pattern.
+
+-u::
+--unmerged::
+	Show unmerged files in the output (forces --stage)
+
+--color[=<when>]::
+	Color file names. The value must be always (default), never,
+	or auto.
+
+--no-color::
+	Turn off coloring, even when the configuration file gives the
+	default to color output, same as `--color=never`. This is the
+	default.
+
+--column[=<options>]::
+--no-column::
+	Display files in columns. See configuration variable column.ui
+	for option syntax.`--column` and `--no-column` without options
+	are equivalent to 'always' and 'never' respectively.
+
+--max-depth <depth>::
+	For each <pathspec> given on command line, descend at most <depth>
+	levels of directories. A negative value means no limit.
+	This option is ignored if <pathspec> contains active wildcards.
+	In other words if "a*" matches a directory named "a*",
+	"*" is matched literally so --max-depth is still effective.
+
+<pathspec>::
+	Files to show. :(glob) magic is enabled and recursion disabled
+	by default.
+
+SEE ALSO
+--------
+linkgit:git-ls-files[1]
+
+GIT
+---
+Part of the linkgit:git[1] suite
diff --git a/Makefile b/Makefile
index f6a6e14..b0bc40a 100644
--- a/Makefile
+++ b/Makefile
@@ -584,6 +584,7 @@ BUILT_INS += git-cherry-pick$X
 BUILT_INS += git-format-patch$X
 BUILT_INS += git-fsck-objects$X
 BUILT_INS += git-init$X
+BUILT_INS += git-ls$X
 BUILT_INS += git-merge-subtree$X
 BUILT_INS += git-show$X
 BUILT_INS += git-stage$X
diff --git a/builtin.h b/builtin.h
index c47c110..177aa7d 100644
--- a/builtin.h
+++ b/builtin.h
@@ -75,6 +75,7 @@ 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 20ca3f2..74eb3c2 100644
--- a/builtin/ls-files.c
+++ b/builtin/ls-files.c
@@ -33,6 +33,7 @@ static int use_color;
 static unsigned int colopts;
 static int max_depth = -1;
 static int show_tag;
+static int porcelain;
 
 static const char *prefix;
 static int max_prefix_len;
@@ -588,6 +589,10 @@ static int ls_files(const char **argv, const char *prefix)
 			die("ls-files --with-tree is incompatible with -s or -u");
 		overlay_tree_on_cache(with_tree, max_prefix);
 	}
+	if (porcelain) {
+		refresh_index(&the_index, REFRESH_QUIET, &pathspec, NULL, NULL);
+		setup_pager();
+	}
 	show_files(&dir);
 	if (show_resolve_undo)
 		show_ru_info();
@@ -687,3 +692,68 @@ int cmd_ls_files(int argc, const char **argv, const char *cmd_prefix)
 			ls_files_usage, 0);
 	return ls_files(argv, prefix);
 }
+
+static const char * const ls_usage[] = {
+	N_("git ls [options] [<file>...]"),
+	NULL
+};
+
+static int git_ls_config(const char *var, const char *value, void *cb)
+{
+	if (starts_with(var, "column."))
+		return git_column_config(var, value, "ls", &colopts);
+	if (!strcmp(var, "color.ls")) {
+		use_color = git_config_colorbool(var, value);
+		return 0;
+	}
+	return git_color_default_config(var, value, cb);
+}
+
+int cmd_ls(int argc, const char **argv, const char *cmd_prefix)
+{
+	struct option builtin_ls_options[] = {
+		OPT_BOOL('c', "cached", &show_cached,
+			N_("show cached files in the output (default)")),
+		OPT_BOOL('d', "deleted", &show_deleted,
+			N_("show deleted files in the output")),
+		OPT_BOOL('m', "modified", &show_modified,
+			N_("show modified files in the output")),
+		OPT_BOOL('o', "others", &show_others,
+			N_("show other files in the output")),
+		OPT_BIT('i', "ignored", &dir.flags,
+			N_("show ignored files in the output"),
+			DIR_SHOW_IGNORED),
+		OPT_BOOL('u', "unmerged", &show_unmerged,
+			N_("show unmerged files in the output")),
+		OPT__COLOR(&use_color, N_("show color")),
+		OPT_COLUMN(0, "column", &colopts, N_("show files in columns")),
+		{ OPTION_INTEGER, 0, "max-depth", &max_depth, N_("depth"),
+			N_("descend at most <depth> levels"), PARSE_OPT_NONEG,
+			NULL, 1 },
+		OPT__ABBREV(&abbrev),
+		OPT_END()
+	};
+
+	if (argc == 2 && !strcmp(argv[1], "-h"))
+		usage_with_options(ls_usage, builtin_ls_options);
+
+	prefix = cmd_prefix;
+	if (prefix)
+		prefix_len = strlen(prefix);
+	git_config(git_ls_config, NULL);
+
+	if (read_cache() < 0)
+		die("index file corrupt");
+
+	/* default setup */
+	porcelain = 1;
+	setenv(GIT_GLOB_PATHSPECS_ENVIRONMENT, "1", 1);
+	exc_given = 1;
+	setup_standard_excludes(&dir);
+	use_color = -1;
+	max_depth = 0;
+
+	argc = parse_options(argc, argv, prefix, builtin_ls_options,
+			     ls_usage, 0);
+	return ls_files(argv, prefix);
+}
diff --git a/command-list.txt b/command-list.txt
index cf36c3d..89e5cef 100644
--- a/command-list.txt
+++ b/command-list.txt
@@ -64,6 +64,7 @@ git-init                                mainporcelain common
 git-instaweb                            ancillaryinterrogators
 gitk                                    mainporcelain
 git-log                                 mainporcelain common
+git-ls                                  mainporcelain
 git-ls-files                            plumbinginterrogators
 git-ls-remote                           plumbinginterrogators
 git-ls-tree                             plumbinginterrogators
diff --git a/git.c b/git.c
index 9efd1a3..682a81e 100644
--- a/git.c
+++ b/git.c
@@ -381,6 +381,7 @@ static struct cmd_struct commands[] = {
 	{ "init", cmd_init_db },
 	{ "init-db", cmd_init_db },
 	{ "log", cmd_log, RUN_SETUP },
+	{ "ls", cmd_ls, RUN_SETUP },
 	{ "ls-files", cmd_ls_files, RUN_SETUP },
 	{ "ls-remote", cmd_ls_remote, RUN_SETUP_GENTLY },
 	{ "ls-tree", cmd_ls_tree, RUN_SETUP },
-- 
1.9.1.345.ga1a145c