--quiet + STDIN never gives errors and exits with exitcode 0

[petski]

Quiet + file:

$ echo "{ 'single-quoted': 'thus-bad-json' }" > /tmp/bad.json
$ jsonlint -c -q /tmp/bad.json ; echo $?
/tmp/bad.json: line 1, col 1, found: 'INVALID' - expected: 'STRING', '}'.
1

Quiet + STDIN:

$ echo "{ 'single-quoted': 'thus-bad-json' }" | jsonlint -c -q -; echo $?
0

Resolved with following patch:

--- /usr/local/bin/jsonlint.orig        2013-11-28 11:43:41.000000000 +0100
+++ /usr/local/bin/jsonlint     2013-11-28 11:44:48.000000000 +0100
@@ -147,7 +147,8 @@ function main (args) {
       source += chunk.toString('utf8');
     });
     stdin.on('end', function () {
-      if (! options.quiet) {console.log(parse(source))};
+      source = parse(source);
+      if (! options.quiet) {console.log(source)};
     });
   }
 }

Behaviour after patch:

$ echo "{ 'single-quoted': 'thus-bad-json' }" | jsonlint -c -q -; echo $?
line 1, col 1, found: 'INVALID' - expected: 'STRING', '}'.
1

[prantlf]

I needed some bugfixes and extensions to jsonlint and did them in my fork. I released the changes as a new NPM module @prantlf/jsonlint. A proper error output despite the "quiet mode" and reading data from stdin was one of them.