[PATCH v3 16/18] list-files: show directories as well as files

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The index does not store directories explicitly (except submodules) so
we have to figure them out from file list. The function
show_directories() deliberately generates duplicate directories and
expects the previous patch to remove duplicates.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
---
 builtin/ls-files.c | 44 +++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 43 insertions(+), 1 deletion(-)

diff --git a/builtin/ls-files.c b/builtin/ls-files.c
index 9a8f687..9dc1c39 100644
--- a/builtin/ls-files.c
+++ b/builtin/ls-files.c
@@ -27,6 +27,8 @@ static int show_resolve_undo;
 static int show_modified;
 static int show_killed;
 static int show_valid_bit;
+static int show_tag;
+static int show_dirs;
 static int line_terminator = '\n';
 static int debug_mode;
 static int use_color;
@@ -333,6 +335,43 @@ static void show_files(struct dir_struct *dir)
 	}
 }
 
+static void show_directories(const struct cache_entry *ce)
+{
+	static const char *last_directory;
+	struct strbuf sb = STRBUF_INIT;
+	const char *p = ce->name + prefix_len;
+	const char *sep;
+
+	if (last_directory) {
+		int len = strlen(last_directory);
+		if (!strncmp(ce->name, last_directory, len) &&
+		    ce->name[len] == '/')
+			p += len + 1;
+	}
+
+	while (*p && (sep = strchr(p, '/'))) {
+		struct strbuf sb2 = STRBUF_INIT;
+		strbuf_reset(&sb);
+		strbuf_add(&sb, ce->name, sep - ce->name);
+		p = sep + 1;
+		if (!match_pathspec(&pathspec, sb.buf, sb.len,
+				    prefix_len, NULL, 1))
+			continue;
+		write_name(&sb2, sb.buf);
+		if (want_color(use_color)) {
+			struct strbuf sb3 = STRBUF_INIT;
+			color_filename(&sb3, ce->name, sb2.buf, S_IFDIR, 1);
+			strbuf_release(&sb2);
+			sb2 = sb3;
+		}
+		if (show_tag)
+			strbuf_insert(&sb2, 0, tag_cached, strlen(tag_cached));
+		last_directory = strbuf_detach(&sb, NULL);
+		strbuf_fputs(&sb2, last_directory, NULL);
+		strbuf_release(&sb2);
+	}
+}
+
 static void show_files_compact(struct dir_struct *dir)
 {
 	int i;
@@ -353,6 +392,8 @@ static void show_files_compact(struct dir_struct *dir)
 		const struct cache_entry *ce = active_cache[i];
 		struct stat st;
 		int err, shown = 0;
+		if (show_dirs)
+			show_directories(ce);
 		if ((dir->flags & DIR_SHOW_IGNORED) &&
 		    !ce_excluded(dir, ce))
 			continue;
@@ -575,7 +616,7 @@ static int git_ls_config(const char *var, const char *value, void *cb)
 
 int cmd_ls_files(int argc, const char **argv, const char *cmd_prefix)
 {
-	int require_work_tree = 0, show_tag = 0, i;
+	int require_work_tree = 0, i;
 	int max_depth = -1;
 	const char *max_prefix;
 	struct dir_struct dir;
@@ -696,6 +737,7 @@ int cmd_ls_files(int argc, const char **argv, const char *cmd_prefix)
 		use_color = -1;
 		max_depth = 0;
 		show_tag = -1;
+		show_dirs = 1;
 		git_config(git_ls_config, NULL);
 	} else
 		git_config(git_default_config, NULL);
-- 
1.9.1.345.ga1a145c

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