[PATCH v2 2/3] git stat: the beginning

[Junio C Hamano <gitster@pobox.com>]

Tentatively add "git stat" as a new command.  This does not munge the
index with paths parameters before showing the status like "git status"
does.  In later rounds, we will take path parameters as pathspec to limit
the output.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 Makefile         |    1 +
 builtin-commit.c |   56 ++++++++++++++++++++++++++++++++++++++++++++---------
 builtin.h        |    1 +
 git.c            |    1 +
 wt-status.c      |   24 ++++++++++++++--------
 wt-status.h      |    1 +
 6 files changed, 65 insertions(+), 19 deletions(-)

diff --git a/Makefile b/Makefile
index daf4296..39dd334 100644
--- a/Makefile
+++ b/Makefile
@@ -378,6 +378,7 @@ BUILT_INS += git-init$X
 BUILT_INS += git-merge-subtree$X
 BUILT_INS += git-peek-remote$X
 BUILT_INS += git-repo-config$X
+BUILT_INS += git-stat$X
 BUILT_INS += git-show$X
 BUILT_INS += git-stage$X
 BUILT_INS += git-status$X
diff --git a/builtin-commit.c b/builtin-commit.c
index 3a7e35d..10f9d4f 100644
--- a/builtin-commit.c
+++ b/builtin-commit.c
@@ -35,6 +35,11 @@ static const char * const builtin_status_usage[] = {
 	NULL
 };
 
+static const char * const builtin_stat_usage[] = {
+	"git stat [options]",
+	NULL
+};
+
 static unsigned char head_sha1[20], merge_head_sha1[20];
 static char *use_message_buffer;
 static const char commit_editmsg[] = "COMMIT_EDITMSG";
@@ -693,6 +698,21 @@ static const char *find_author_by_nickname(const char *name)
 	die("No existing author found with '%s'", name);
 }
 
+
+static void handle_untracked_files_arg(void)
+{
+	if (!untracked_files_arg)
+		; /* default already initialized */
+	else if (!strcmp(untracked_files_arg, "no"))
+		show_untracked_files = SHOW_NO_UNTRACKED_FILES;
+	else if (!strcmp(untracked_files_arg, "normal"))
+		show_untracked_files = SHOW_NORMAL_UNTRACKED_FILES;
+	else if (!strcmp(untracked_files_arg, "all"))
+		show_untracked_files = SHOW_ALL_UNTRACKED_FILES;
+	else
+		die("Invalid untracked files mode '%s'", untracked_files_arg);
+}
+
 static int parse_and_validate_options(int argc, const char *argv[],
 				      const char * const usage[],
 				      const char *prefix)
@@ -795,16 +815,7 @@ static int parse_and_validate_options(int argc, const char *argv[],
 	else
 		die("Invalid cleanup mode %s", cleanup_arg);
 
-	if (!untracked_files_arg)
-		; /* default already initialized */
-	else if (!strcmp(untracked_files_arg, "no"))
-		show_untracked_files = SHOW_NO_UNTRACKED_FILES;
-	else if (!strcmp(untracked_files_arg, "normal"))
-		show_untracked_files = SHOW_NORMAL_UNTRACKED_FILES;
-	else if (!strcmp(untracked_files_arg, "all"))
-		show_untracked_files = SHOW_ALL_UNTRACKED_FILES;
-	else
-		die("Invalid untracked files mode '%s'", untracked_files_arg);
+	handle_untracked_files_arg();
 
 	if (all && argc > 0)
 		die("Paths with -a does not make sense.");
@@ -814,6 +825,31 @@ static int parse_and_validate_options(int argc, const char *argv[],
 	return argc;
 }
 
+int cmd_stat(int argc, const char **argv, const char *prefix)
+{
+	struct wt_status s;
+	static struct option builtin_stat_options[] = {
+		{ OPTION_STRING, 'u', "untracked-files", &untracked_files_arg,
+		  "mode",
+		  "show untracked files, optional modes: all, normal, no. (Default: all)",
+		  PARSE_OPT_OPTARG, NULL, (intptr_t)"all" },
+		OPT_END(),
+	};
+
+	argc = parse_options(argc, argv, prefix,
+			     builtin_stat_options,
+			     builtin_stat_usage, 0);
+	handle_untracked_files_arg();
+
+	read_cache();
+	refresh_cache(REFRESH_QUIET|REFRESH_UNMERGED);
+	wt_status_prepare(&s);
+	wt_status_collect_changes(&s);
+
+	wt_status_print_body(&s);
+	return 0;
+}
+
 static int dry_run_commit(int argc, const char **argv, const char *prefix)
 {
 	int commitable;
diff --git a/builtin.h b/builtin.h
index 20427d2..eeaf0b6 100644
--- a/builtin.h
+++ b/builtin.h
@@ -95,6 +95,7 @@ extern int cmd_send_pack(int argc, const char **argv, const char *prefix);
 extern int cmd_shortlog(int argc, const char **argv, const char *prefix);
 extern int cmd_show(int argc, const char **argv, const char *prefix);
 extern int cmd_show_branch(int argc, const char **argv, const char *prefix);
+extern int cmd_stat(int argc, const char **argv, const char *prefix);
 extern int cmd_status(int argc, const char **argv, const char *prefix);
 extern int cmd_stripspace(int argc, const char **argv, const char *prefix);
 extern int cmd_symbolic_ref(int argc, const char **argv, const char *prefix);
diff --git a/git.c b/git.c
index 807d875..de7fcf6 100644
--- a/git.c
+++ b/git.c
@@ -350,6 +350,7 @@ static void handle_internal_command(int argc, const char **argv)
 		{ "shortlog", cmd_shortlog, USE_PAGER },
 		{ "show-branch", cmd_show_branch, RUN_SETUP },
 		{ "show", cmd_show, RUN_SETUP | USE_PAGER },
+		{ "stat", cmd_stat, RUN_SETUP | NEED_WORK_TREE },
 		{ "status", cmd_status, RUN_SETUP | NEED_WORK_TREE },
 		{ "stripspace", cmd_stripspace },
 		{ "symbolic-ref", cmd_symbolic_ref, RUN_SETUP },
diff --git a/wt-status.c b/wt-status.c
index 97fedfa..6eb32df 100644
--- a/wt-status.c
+++ b/wt-status.c
@@ -537,6 +537,20 @@ static void wt_status_print_tracking(struct wt_status *s)
 	color_fprintf_ln(s->fp, color(WT_STATUS_HEADER), "#");
 }
 
+void wt_status_print_body(struct wt_status *s)
+{
+	wt_status_print_unmerged(s);
+	wt_status_print_updated(s);
+	wt_status_print_changed(s);
+	if (wt_status_submodule_summary)
+		wt_status_print_submodule_summary(s);
+	if (show_untracked_files)
+		wt_status_print_untracked(s);
+	else if (s->commitable)
+		fprintf(s->fp,
+			"# Untracked files not listed (use -u option to show untracked files)\n");
+}
+
 void wt_status_print(struct wt_status *s)
 {
 	unsigned char sha1[20];
@@ -567,15 +581,7 @@ void wt_status_print(struct wt_status *s)
 		color_fprintf_ln(s->fp, color(WT_STATUS_HEADER), "#");
 	}
 
-	wt_status_print_unmerged(s);
-	wt_status_print_updated(s);
-	wt_status_print_changed(s);
-	if (wt_status_submodule_summary)
-		wt_status_print_submodule_summary(s);
-	if (show_untracked_files)
-		wt_status_print_untracked(s);
-	else if (s->commitable)
-		 fprintf(s->fp, "# Untracked files not listed (use -u option to show untracked files)\n");
+	wt_status_print_body(s);
 
 	if (s->verbose)
 		wt_status_print_verbose(s);
diff --git a/wt-status.h b/wt-status.h
index f80142f..ebbf06a 100644
--- a/wt-status.h
+++ b/wt-status.h
@@ -50,6 +50,7 @@ extern int wt_status_use_color;
 extern int wt_status_relative_paths;
 void wt_status_prepare(struct wt_status *s);
 void wt_status_print(struct wt_status *s);
+void wt_status_print_body(struct wt_status *s);
 void wt_status_collect_changes(struct wt_status *s);
 
 #endif /* STATUS_H */
-- 
1.6.4.159.gd0d612