[PATCH] t/test-lib: print pretty msg when git isn't built

[Ramkumar Ramachandra <artagnon@gmail.com>]

When tests were run without building git, the following error message
was displayed:

    .: 54: Can't open /path/to/git/source/t/../GIT-BUILD-OPTIONS

Change this to display a more user-friendly error message:

     error: you do not seem to have built git yet.

Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
---
 t/t0000-basic.sh |   10 ----------
 t/test-lib.sh    |    6 ++++++
 2 files changed, 6 insertions(+), 10 deletions(-)

diff --git a/t/t0000-basic.sh b/t/t0000-basic.sh
index ae6a3f0..08677df 100755
--- a/t/t0000-basic.sh
+++ b/t/t0000-basic.sh
@@ -18,16 +18,6 @@ swapping compression and hashing order, the person who is making the
 modification *should* take notice and update the test vectors here.
 '
 
-################################################################
-# It appears that people try to run tests without building...
-
-../git >/dev/null
-if test $? != 1
-then
-	echo >&2 'You do not seem to have built git yet.'
-	exit 1
-fi
-
 . ./test-lib.sh
 
 ################################################################
diff --git a/t/test-lib.sh b/t/test-lib.sh
index f8e3733..c00452a 100644
--- a/t/test-lib.sh
+++ b/t/test-lib.sh
@@ -51,6 +51,12 @@ then
 fi
 GIT_BUILD_DIR="$TEST_DIRECTORY"/..
 
+if ! test -r "$GIT_BUILD_DIR"/GIT-BUILD-OPTIONS
+then
+	echo 'error: you do not seem to have built git yet.' >&2
+	exit 1
+fi
+
 . "$GIT_BUILD_DIR"/GIT-BUILD-OPTIONS
 export PERL_PATH SHELL_PATH
 
-- 
1.7.8.1.362.g5d6df.dirty