From: Linus Torvalds <torvalds@osdl.org>
Date: Sun, 27 Nov 2005 19:00:09 GMT
Subject: Re: [PATCH 6/8] ls-tree: work from subdirectory.
Message-ID: <Pine.LNX.4.64.0511271049090.13959@g5.osdl.org>
In-Reply-To: <20051127182244.GK22159@pasky.or.cz>



On Sun, 27 Nov 2005, Petr Baudis wrote:

> Dear diary, on Sun, Nov 27, 2005 at 07:01:37PM CET, I got a letter
> where Linus Torvalds <torvalds@osdl.org> said that...
> > If you use "-r", it acts the way you'd expect. If you _don't_ use "-r", it 
> > acts strangely, but very consistently with git-diff-tree: it only ever 
> > shows the _first_ part of a pathname. So
> > 
> > 	git-ls-tree HEAD drivers/char/
> > 
> > should show just one entry: "drivers". While adding a "-r" should show all 
> > files under drivers (and the trees leading up to it).
> > 
> > And yes, you're right. That's a much bigger change by my suggested diff, 
> > and more likely to cause confusion.
> 
> Ugh. That's really weird. Wouldn't a better approach be to fix
> git-ls-files to behave more sanely? (That is, listing the entry for
> drivers/char instead of drivers?)

Well, it's not actually confusing if you see a path spec for what it is: 
it's not a filename, it's a _pattern_.

So you should always do

	git-ls-tree -r pattern

(and yes, we could even hardcode "-r", because git-ls-tree without it 
really is a pretty strange thing).

The _real_ strangeness in "git-ls-tree" is that it shows the tree nodes at 
all, which no other git tool does when it recurses. 

To get more a "git-ls-files" approach, this trivial patch (on top of my 
previous one) enables recursion (and right now you can't disable it any 
way), and doesn't show partial trees.

I could make it work much more like git-ls-files, in that it could accept 
wildcards. Something like

	git-ls-tree HEAD '*.c'

would show all C files (recursively), the same way git-ls-files does for 
the index.

Hmm?

		Linus

----
diff --git a/ls-tree.c b/ls-tree.c
index 598b729..cf0dbbc 100644
--- a/ls-tree.c
+++ b/ls-tree.c
@@ -11,7 +11,7 @@
 static int line_termination = '\n';
 #define LS_RECURSIVE 1
 #define LS_TREE_ONLY 2
-static int ls_options = 0;
+static int ls_options = LS_RECURSIVE;
 
 static const char ls_tree_usage[] =
 	"git-ls-tree [-d] [-r] [-z] <tree-ish> [path...]";
@@ -19,16 +19,15 @@ static const char ls_tree_usage[] =
 static int show_tree(unsigned char *sha1, const char *base, int baselen, const char *pathname, unsigned mode, int stage)
 {
 	const char *type = "blob";
-	int retval = 0;
 
 	if (S_ISDIR(mode)) {
-		type = "tree";
 		if (ls_options & LS_RECURSIVE)
-			retval = READ_TREE_RECURSIVE;
+			return READ_TREE_RECURSIVE;
+		type = "tree";
 	}
 
 	printf("%06o %s %s\t%.*s%s%c", mode, type, sha1_to_hex(sha1), baselen, base, pathname, line_termination);
-	return retval;
+	return 0;
 }
 
 int main(int argc, const char **argv)