element-maker-test: try to run element-maker for all templates

Add an easy way to check the element-maker templates.

tools/Makefile.am

@@ -26,5 +26,12 @@ templatefiles=\
 EXTRA_DIST = \
 	gst-element-maker \
 	gst-app-maker \
-	$(templatefiles)
+	$(templatefiles) \
+	gst-element-maker-test.sh
+
+TESTS_ENVIRONMENT = \
+	SRC_DIR=$(abs_srcdir) \
+	TEMPLATE_FILES="$(templatefiles)"
+
+TESTS = gst-element-maker-test.sh
 

tools/gst-element-maker-test.sh

@@ -0,0 +1,20 @@
+#!/bin/sh
+
+tmpdir=`mktemp --tmpdir -d gst.XXXXXXXXXX`
+workdir=$PWD
+cd $tmpdir
+res=0
+
+for file in $TEMPLATE_FILES; do
+  name=`basename $file element-templates`
+  $SRC_DIR/gst-element-maker gst$name $name
+  if test $? -ne 0; then
+    res=1
+    break
+  fi
+done
+
+cd $workdir
+rm -rf $tmpdir
+exit $res;
+