t/interop: report which vanilla git command failed

The interop test library sets up wrappers "git.a" and "git.b" to
represent the two versions to be tested. It also wraps vanilla "git" to
report an error, with the goal of catching tests which accidentally fail
to use one of the version-specific wrappers (which could invalidate the
tests in a very subtle way).

But when it catches an invocation of vanilla git, it doesn't give any
details, which makes it very hard to debug exactly which invocation is
responsible (especially if it's buried in a function invocation, etc).
Let's report the arguments passed to git, which helps narrow it down.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/t/interop/interop-lib.sh b/t/interop/interop-lib.sh
index 3e0a2911d4f9baa889eef85877a6332b27015dfc..62f4481b6e4097db907806aa6330ae0b64793d5d 100644 (file)
--- a/t/interop/interop-lib.sh
+++ b/t/interop/interop-lib.sh
@@ -68,7 +68,7 @@ generate_wrappers () {
        wrap_git .bin/git.a "$DIR_A" &&
        wrap_git .bin/git.b "$DIR_B" &&
        write_script .bin/git <<-\EOF &&
-       echo >&2 fatal: test tried to run generic git
+       echo >&2 fatal: test tried to run generic git: $*
        exit 1
        EOF
        PATH=$(pwd)/.bin:$PATH