blame: Fix git-blame <directory>

Before this patch git-blame <directory> gave non-sensible output. (It
assigned blame to some random file in <directory>) Abort with an error
message instead.

Signed-off-by: Fredrik Kuivinen <freku045@student.liu.se>
Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/blame.c b/blame.c
index 8af4b543000588f352d49e671888b815b5dce55f..9c97aeca451f641ff319fc4bee70a97488e619cd 100644 (file)
--- a/blame.c
+++ b/blame.c
@@ -180,11 +180,13 @@ static int get_blob_sha1_internal(unsigned char *sha1, const char *base,
                                  unsigned mode, int stage);
 
 static unsigned char blob_sha1[20];
+static const char* blame_file;
 static int get_blob_sha1(struct tree *t, const char *pathname,
                         unsigned char *sha1)
 {
        int i;
        const char *pathspec[2];
+       blame_file = pathname;
        pathspec[0] = pathname;
        pathspec[1] = NULL;
        memset(blob_sha1, 0, sizeof(blob_sha1));
@@ -209,6 +211,10 @@ static int get_blob_sha1_internal(unsigned char *sha1, const char *base,
        if (S_ISDIR(mode))
                return READ_TREE_RECURSIVE;
 
+       if (strncmp(blame_file, base, baselen) ||
+           strcmp(blame_file + baselen, pathname))
+               return -1;
+
        memcpy(blob_sha1, sha1, 20);
        return -1;
 }