Move 'builtin-*' into a 'builtin/' subdirectory

This shrinks the top-level directory a bit, and makes it much more
pleasant to use auto-completion on the thing. Instead of

	[torvalds@nehalem git]$ em buil<tab>
	Display all 180 possibilities? (y or n)
	[torvalds@nehalem git]$ em builtin-sh
	builtin-shortlog.c     builtin-show-branch.c  builtin-show-ref.c
	builtin-shortlog.o     builtin-show-branch.o  builtin-show-ref.o
	[torvalds@nehalem git]$ em builtin-shor<tab>
	builtin-shortlog.c  builtin-shortlog.o
	[torvalds@nehalem git]$ em builtin-shortlog.c

you get

	[torvalds@nehalem git]$ em buil<tab>		[type]
	builtin/   builtin.h
	[torvalds@nehalem git]$ em builtin		[auto-completes to]
	[torvalds@nehalem git]$ em builtin/sh<tab>	[type]
	shortlog.c     shortlog.o     show-branch.c  show-branch.o  show-ref.c     show-ref.o
	[torvalds@nehalem git]$ em builtin/sho		[auto-completes to]
	[torvalds@nehalem git]$ em builtin/shor<tab>	[type]
	shortlog.c  shortlog.o
	[torvalds@nehalem git]$ em builtin/shortlog.c

which doesn't seem all that different, but not having that annoying
break in "Display all 180 possibilities?" is quite a relief.

NOTE! If you do this in a clean tree (no object files etc), or using an
editor that has auto-completion rules that ignores '*.o' files, you
won't see that annoying 'Display all 180 possibilities?' message - it
will just show the choices instead.  I think bash has some cut-off
around 100 choices or something.

So the reason I see this is that I'm using an odd editory, and thus
don't have the rules to cut down on auto-completion.  But you can
simulate that by using 'ls' instead, or something similar.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 56 insertions, 0 deletions

diff --git a/builtin/write-tree.c b/builtin/write-tree.c
new file mode 100644
index 0000000000..b223af416f
--- /dev/null
+++ b/builtin/write-tree.c
@@ -0,0 +1,56 @@
+/*
+ * GIT - The information manager from hell
+ *
+ * Copyright (C) Linus Torvalds, 2005
+ */
+#include "builtin.h"
+#include "cache.h"
+#include "tree.h"
+#include "cache-tree.h"
+#include "parse-options.h"
+
+static const char * const write_tree_usage[] = {
+	"git write-tree [--missing-ok] [--prefix=<prefix>/]",
+	NULL
+};
+
+int cmd_write_tree(int argc, const char **argv, const char *unused_prefix)
+{
+	int flags = 0, ret;
+	const char *prefix = NULL;
+	unsigned char sha1[20];
+	const char *me = "git-write-tree";
+	struct option write_tree_options[] = {
+		OPT_BIT(0, "missing-ok", &flags, "allow missing objects",
+			WRITE_TREE_MISSING_OK),
+		{ OPTION_STRING, 0, "prefix", &prefix, "<prefix>/",
+		  "write tree object for a subdirectory <prefix>" ,
+		  PARSE_OPT_LITERAL_ARGHELP },
+		{ OPTION_BIT, 0, "ignore-cache-tree", &flags, NULL,
+		  "only useful for debugging",
+		  PARSE_OPT_HIDDEN | PARSE_OPT_NOARG, NULL,
+		  WRITE_TREE_IGNORE_CACHE_TREE },
+		OPT_END()
+	};
+
+	git_config(git_default_config, NULL);
+	argc = parse_options(argc, argv, unused_prefix, write_tree_options,
+			     write_tree_usage, 0);
+
+	ret = write_cache_as_tree(sha1, flags, prefix);
+	switch (ret) {
+	case 0:
+		printf("%s\n", sha1_to_hex(sha1));
+		break;
+	case WRITE_TREE_UNREADABLE_INDEX:
+		die("%s: error reading the index", me);
+		break;
+	case WRITE_TREE_UNMERGED_INDEX:
+		die("%s: error building trees", me);
+		break;
+	case WRITE_TREE_PREFIX_ERROR:
+		die("%s: prefix %s not found", me, prefix);
+		break;
+	}
+	return ret;
+}