golint.bash: fix exit codes

We want to exit with 1 only if we we have complaints left after
the greps.

golint.bash

@@ -1,7 +1,18 @@
-#!/bin/bash
+#!/bin/bash -u
 
-golint ./... | \
- grep -v "don't use an underscore in package name" | \
- grep -v "don't use ALL_CAPS in Go names; use CamelCase" |
- grep -v "struct field allow_other should be allowOther" |
- grep -v "struct field serialize_reads should be serializeReads"
+OUTPUT=$(
+	golint ./... | \
+	 grep -v "don't use an underscore in package name" | \
+	 grep -v "don't use ALL_CAPS in Go names; use CamelCase" |
+	 grep -v "struct field allow_other should be allowOther" |
+	 grep -v "struct field serialize_reads should be serializeReads"
+)
+
+# No output --> all good
+if [[ -z "$OUTPUT" ]] ; then
+	exit 0
+fi
+
+echo "golint.bash:"
+echo $OUTPUT
+exit 1

test.bash

@@ -33,7 +33,7 @@ fi
 if go tool | grep vet > /dev/null ; then
 	go tool vet -all -shadow .
 else
-	echo "\"go tool vet\" not available - skipping"
+	echo "'go tool vet' not available - skipping"
 fi
 
 # We don't want all the subprocesses holding the lock file open