fetch-pack: avoid repeatedly re-scanning pack directory

diff --git a/t/test-lib.sh b/t/test-lib.sh
index 49d8b21d2d1eb301105f3aee2ff91f27344c12a2..b8ee3486b174caf656e620e2bc888c820d37d60d 100644 (file)
--- a/t/test-lib.sh
+++ b/t/test-lib.sh
@@ -35,6 +35,15 @@ then
 fi
 GIT_BUILD_DIR="$TEST_DIRECTORY"/..
 
+################################################################
+# It appears that people try to run tests without building...
+"$GIT_BUILD_DIR/git" >/dev/null
+if test $? != 1
+then
+       echo >&2 'error: you do not seem to have built git yet.'
+       exit 1
+fi
+
 . "$GIT_BUILD_DIR"/GIT-BUILD-OPTIONS
 export PERL_PATH SHELL_PATH
 
@@ -659,9 +668,29 @@ test_i18ngrep () {
        fi
 }
 
-# test whether the filesystem supports symbolic links
-ln -s x y 2>/dev/null && test -h y 2>/dev/null && test_set_prereq SYMLINKS
-rm -f y
+test_lazy_prereq SYMLINKS '
+       # test whether the filesystem supports symbolic links
+       ln -s x y && test -h y
+'
+
+test_lazy_prereq CASE_INSENSITIVE_FS '
+       echo good >CamelCase &&
+       echo bad >camelcase &&
+       test "$(cat CamelCase)" != good
+'
+
+test_lazy_prereq UTF8_NFD_TO_NFC '
+       # check whether FS converts nfd unicode to nfc
+       auml=$(printf "\303\244")
+       aumlcdiar=$(printf "\141\314\210")
+       >"$auml" &&
+       case "$(echo *)" in
+       "$aumlcdiar")
+               true ;;
+       *)
+               false ;;
+       esac
+'
 
 # When the tests are run as root, permission tests will report that
 # things are writable when they shouldn't be.