Merge branch 'ps/t0000-output-directory-fix'

"TEST_OUTPUT_DIRECTORY=there make test" failed to work, which has
been corrected.

* ps/t0000-output-directory-fix:
  t0000: fix test if run with TEST_OUTPUT_DIRECTORY

Author: gitster

t/t0000-basic.sh

@@ -106,8 +106,11 @@ _run_sub_test_lib_test_common () {
 		EOF
 		cat >>"$name.sh" &&
 		export TEST_DIRECTORY &&
-		TEST_OUTPUT_DIRECTORY=$(pwd) &&
-		export TEST_OUTPUT_DIRECTORY &&
+		# The child test re-sources GIT-BUILD-OPTIONS and may thus
+		# override the test output directory. We thus pass it as an
+		# explicit override to the child.
+		TEST_OUTPUT_DIRECTORY_OVERRIDE=$(pwd) &&
+		export TEST_OUTPUT_DIRECTORY_OVERRIDE &&
 		GIT_SKIP_TESTS=$skip &&
 		export GIT_SKIP_TESTS &&
 		sane_unset GIT_TEST_FAIL_PREREQS &&

t/test-lib.sh

@@ -57,6 +57,15 @@ fi
 . "$GIT_BUILD_DIR"/GIT-BUILD-OPTIONS
 export PERL_PATH SHELL_PATH
 
+# In t0000, we need to override test directories of nested testcases. In case
+# the developer has TEST_OUTPUT_DIRECTORY part of his build options, then we'd
+# reset this value to instead contain what the developer has specified. We thus
+# have this knob to allow overriding the directory.
+if test -n "${TEST_OUTPUT_DIRECTORY_OVERRIDE}"
+then
+	TEST_OUTPUT_DIRECTORY="${TEST_OUTPUT_DIRECTORY_OVERRIDE}"
+fi
+
 # Disallow the use of abbreviated options in the test suite by default
 if test -z "${GIT_TEST_DISALLOW_ABBREVIATED_OPTIONS}"
 then