show-index takes .idx from stdin while v3 requires the .pack. It's
used for testing purposes only. Let those test scripts force .idx v2
with index-pack.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclo...@gmail.com>
---
 show-index.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/show-index.c b/show-index.c
index 5a9eed7..2028e02 100644
--- a/show-index.c
+++ b/show-index.c
@@ -19,8 +19,10 @@ int main(int argc, char **argv)
                die("unable to read header");
        if (top_index[0] == htonl(PACK_IDX_SIGNATURE)) {
                version = ntohl(top_index[1]);
-               if (version < 2 || version > 2)
+               if (version < 2 || version > 3)
                        die("unknown index version");
+               if (version == 3)
+                       die("show-index does not support .idx v3, convert to v2 
instead");
                if (fread(top_index, 256 * 4, 1, stdin) != 1)
                        die("unable to read index");
        } else {
-- 
1.8.2.82.gc24b958

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