[PATCH 6/8] ls-tree: work from subdirectory.

[Junio C Hamano <junkio@cox.net>]

This makes ls-tree to work from subdirectory.  It defaults to
show the paths under the current subdirectory, and interprets
user-supplied paths as relative to the current subdirectory.

Signed-off-by: Junio C Hamano <junkio@cox.net>

---

 ls-tree.c |   21 ++++++++++++++++-----
 1 files changed, 16 insertions(+), 5 deletions(-)

applies-to: 4e55e4796ee699c9361b3751a36a85ba282119a8
40af60bb52cd86e1f089eeb89b2d3d79531c55d1
diff --git a/ls-tree.c b/ls-tree.c
index d9f15e3..ed546a5 100644
--- a/ls-tree.c
+++ b/ls-tree.c
@@ -8,6 +8,8 @@
 #include "tree.h"
 #include "quote.h"
 
+static const char *prefix;
+
 static int line_termination = '\n';
 #define LS_RECURSIVE 1
 #define LS_TREE_ONLY 2
@@ -204,7 +206,7 @@ static int list_one(const char *path)
 	return err;
 }
 
-static int list(char **path)
+static int list(const char **path)
 {
 	int i;
 	int err = 0;
@@ -216,11 +218,16 @@ static int list(char **path)
 static const char ls_tree_usage[] =
 	"git-ls-tree [-d] [-r] [-z] <tree-ish> [path...]";
 
-int main(int argc, char **argv)
+int main(int argc, const char **argv)
 {
-	static char *path0[] = { "", NULL };
-	char **path;
+	static const char *path0[] = { "", NULL };
+	const char **path;
 	unsigned char sha1[20];
+	int nongit = 0;
+
+	prefix = setup_git_directory_gently(&nongit);
+	if (prefix)
+		path0[0] = prefix;
 
 	while (1 < argc && argv[1][0] == '-') {
 		switch (argv[1][1]) {
@@ -244,7 +251,11 @@ int main(int argc, char **argv)
 	if (get_sha1(argv[1], sha1) < 0)
 		usage(ls_tree_usage);
 
-	path = (argc == 2) ? path0 : (argv + 2);
+	if (argc == 2)
+		path = path0;
+	else
+		path = get_pathspec(prefix, argv + 2);
+
 	prepare_root(sha1);
 	if (list(path) < 0)
 		die("list failed");
---
0.99.9.GIT