Teach update-index to read from ls-tree.

git-update-index --index-info can almost be usable to read from ls-tree
output to update the index (and not the working tree file) to HEAD commit,
but not quite.  It was designed to read from git-apply --index-info
output, and does not want " blob " in ls-tree output.  Accept that as well.

This lets us update "git-checkout <ent> <path>" that used to filter the
extra " blob " string out.  Noted by Luben.

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

diff --git a/git-checkout.sh b/git-checkout.sh
index 4c08f36..9509ab4 100755 (executable)
--- a/git-checkout.sh
+++ b/git-checkout.sh
@@ -82,7 +82,6 @@ then
                # rescuing paths and is never meant to remove what
                # is not in the named tree-ish.
                git-ls-tree -r "$new" "$@" |
-               sed -ne 's/^\([0-7]*\) blob \(.*\)$/\1 \2/p' |
                git-update-index --index-info || exit $?
        fi
        git-checkout-index -f -u -- "$@"

diff --git a/update-index.c b/update-index.c
index 5bbc3de..11b7f6a 100644 (file)
--- a/update-index.c
+++ b/update-index.c
@@ -338,7 +338,7 @@ static void read_index_info(int line_termination)
        struct strbuf buf;
        strbuf_init(&buf);
        while (1) {
-               char *ptr;
+               char *ptr, *tab;
                char *path_name;
                unsigned char sha1[20];
                unsigned int mode;
@@ -348,12 +348,15 @@ static void read_index_info(int line_termination)
                        break;
 
                mode = strtoul(buf.buf, &ptr, 8);
-               if (ptr == buf.buf || *ptr != ' ' ||
-                   get_sha1_hex(ptr + 1, sha1) ||
-                   ptr[41] != '\t')
+               if (ptr == buf.buf || *ptr != ' ')
                        goto bad_line;
 
-               ptr += 42;
+               tab = strchr(ptr, '\t');
+               if (!tab || tab - ptr < 41)
+                       goto bad_line;
+               if (get_sha1_hex(tab - 40, sha1) || tab[-41] != ' ')
+                       goto bad_line;
+               ptr = tab + 1;
 
                if (line_termination && ptr[0] == '"')
                        path_name = unquote_c_style(ptr, NULL);