builtin-merge: show user-friendly error messages for fast-forward too.

diff --git a/mktag.c b/mktag.c
index 99a356e9ee75cb247d80ed6dc0b251ceb0bd9e46..a3b4270c18ea78fa36f7243de5a9e05e2066e030 100644 (file)
--- a/mktag.c
+++ b/mktag.c
@@ -19,16 +19,17 @@
 /*
  * We refuse to tag something we can't verify. Just because.
  */
-static int verify_object(unsigned char *sha1, const char *expected_type)
+static int verify_object(const unsigned char *sha1, const char *expected_type)
 {
        int ret = -1;
        enum object_type type;
        unsigned long size;
-       void *buffer = read_sha1_file(sha1, &type, &size);
+       const unsigned char *repl;
+       void *buffer = read_sha1_file_repl(sha1, &type, &size, &repl);
 
        if (buffer) {
                if (type == type_from_string(expected_type))
-                       ret = check_sha1_signature(sha1, buffer, size, expected_type);
+                       ret = check_sha1_signature(repl, buffer, size, expected_type);
                free(buffer);
        }
        return ret;
@@ -165,7 +166,7 @@ int main(int argc, char **argv)
        setup_git_directory();
 
        if (strbuf_read(&buf, 0, 4096) < 0) {
-               die("could not read from stdin");
+               die_errno("could not read from stdin");
        }
 
        /* Verify it for some basic sanity: it needs to start with