Avoid 'expr index' on Mac OS X as it isn't supported

This fixes git-instaweb so it can start an httpd without warning
about an invalid test command.  Yes its ugly, but its also quite
portable.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

diff --git a/git-instaweb.sh b/git-instaweb.sh
index f5629e7439955666b1755177135ac7ac198bad54..41ff08f8e44b12bddcea257bc66f0b577e342ddd 100755 (executable)
--- a/git-instaweb.sh
+++ b/git-instaweb.sh
@@ -30,8 +30,7 @@ test -z "$port" && port=1234
 
 start_httpd () {
        httpd_only="`echo $httpd | cut -f1 -d' '`"
-       if test "`expr index $httpd_only /`" -eq '1' || \
-                               which $httpd_only >/dev/null
+       if case "$httpd_only" in /*) : ;; *) which $httpd_only >/dev/null;; esac
        then
                $httpd $fqgitdir/gitweb/httpd.conf
        else