lang: Add indentation test to parser

This adds a test case to catch some common typos.

test.sh

@@ -43,6 +43,7 @@ function skip-testsuite()
 # used at the end to tell if everything went fine
 failures=''
 
+run-testsuite ./test/test-vet.sh
 run-testsuite ./test/test-misc.sh
 run-testsuite ./test/test-gofmt.sh
 run-testsuite ./test/test-yamlfmt.sh

test/test-vet.sh

@@ -0,0 +1,44 @@
+#!/bin/bash
+# vet a few random things
+
+echo running "$0"
+
+#ROOT="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && cd .. && pwd )"	# dir!
+ROOT=$(dirname "${BASH_SOURCE}")/..
+cd "${ROOT}"
+. test/util.sh
+
+failures=''
+function run-test()
+{
+	$@ || failures=$( [ -n "$failures" ] && echo "$failures\\n$@" || echo "$@" )
+}
+
+function parser-indentation() {
+	# the $ before the \t magically makes grep match the tab somehow...
+	if grep $'\t|' "$1"; then	# indent the pipe too
+		return 1
+	fi
+	if grep ' |' "$1"; then	# indent the pipe too (no spaces!)
+		return 1
+	fi
+	if grep '^ ' "$1"; then	# format with tabs, no leading spaces
+		return 1
+	fi
+
+	return 0
+}
+
+# loop through individual *.y files
+for file in `find . -maxdepth 3 -type f -name '*.y' -not -path './old/*' -not -path './tmp/*'`; do
+	run-test parser-indentation "$file"
+done
+
+if [[ -n "$failures" ]]; then
+	echo 'FAIL'
+	echo 'The following tests have failed:'
+	echo -e "$failures"
+	echo
+	exit 1
+fi
+echo 'PASS'