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Listen to stderr in toBuffer, so if the convert command fials we can … #739

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Listen to stderr in toBuffer, so if the convert command fials we can … #739

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17 changes: 14 additions & 3 deletions lib/command.js
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Original file line number Diff line number Diff line change
Expand Up @@ -36,14 +36,25 @@ module.exports = function (proto) {
}
}

function streamToUnemptyBuffer(stream, callback) {
function streamToUnemptyBuffer(stream, callback, errorstream) {
var done = false
var buffers = []

stream.on('data', function (data) {
buffers.push(data)
})

if (errorstream) {
errorstream.on('data', function (error) {
if (error) {
debug('Error stream data: ' + error.toString());
done = true;
buffers = null;
callback(error.toString());
}
});
}

stream.on('end', function () {
var result, err;
if (done)
Expand Down Expand Up @@ -159,10 +170,10 @@ module.exports = function (proto) {
throw new Error('gm().toBuffer() expects a callback.');
}

return this.stream(format, function (err, stdout) {
return this.stream(format, function (err, stdout, stderr) {
if (err) return callback(err);

streamToUnemptyBuffer(stdout, callback);
streamToUnemptyBuffer(stdout, callback, stderr);
})
}

Expand Down