rev-parse: better error message for ambiguous arguments

diff --git a/unpack-file.c b/unpack-file.c
index b7988c5575fabd57100d25742a1d0578bcc181d7..23a85623019c3b7a465fba86132df3f4b75d94a5 100644 (file)
--- a/unpack-file.c
+++ b/unpack-file.c
@@ -1,4 +1,5 @@
 #include "cache.h"
+#include "blob.h"
 
 static char *create_temp_file(unsigned char *sha1)
 {
@@ -9,7 +10,7 @@ static char *create_temp_file(unsigned char *sha1)
        int fd;
 
        buf = read_sha1_file(sha1, type, &size);
-       if (!buf || strcmp(type, "blob"))
+       if (!buf || strcmp(type, blob_type))
                die("unable to read blob object %s", sha1_to_hex(sha1));
 
        strcpy(path, ".merge_file_XXXXXX");
@@ -27,7 +28,10 @@ int main(int argc, char **argv)
        unsigned char sha1[20];
 
        if (argc != 2 || get_sha1(argv[1], sha1))
-               usage("unpack-file.c <sha1>");
+               usage("git-unpack-file <sha1>");
+
+       setup_git_directory();
+       git_config(git_default_config);
 
        puts(create_temp_file(sha1));
        return 0;