Add back format inference from filename

.gitignore

@@ -9,5 +9,6 @@ examples/imgs/*
 !examples/imgs/photo.JPG
 !examples/imgs/orientation/*\d.jpg
 !examples/imgs/orientation/*.correct.jpg
+!examples/imgs/icon.ico
 *.sw*
 .idea

index.js

@@ -74,6 +74,7 @@ function gm (source, height, color) {
     var inputFromStdin = this.sourceStream || this.sourceBuffer;
     var ret = inputFromStdin ? '-' : this.source;
 
+    if (inputFromStdin && this.source && this.source !== 'unknown.jpg') ret = this.source.split('.').pop() + ':-';
     if (ret && this.sourceFrames) ret += this.sourceFrames;
 
     src.length = 0;

lib/command.js

@@ -224,7 +224,11 @@ module.exports = function (proto) {
     } catch (e) {
       return cb(e);
     }
-    proc.stdin.once('error', cb);
+    proc.stdin.on('error', function (err) {
+      if (err.code !== 'ECONNRESET') {
+        cb(err);
+      }
+    });
 
     if (timeout) {
       timeoutId = setTimeout(function(){

test/formatInference.js

@@ -0,0 +1,21 @@
+var assert = require('assert')
+var fs = require('fs');
+
+module.exports = function (_, dir, finish, gm) {
+  var m = gm(fs.createReadStream(dir + '/icon.ico'), 'icon.ico')
+
+  var args = m.args();
+  assert.equal('convert', args[0]);
+  assert.equal('ico:-', args[1]);
+
+  if (!gm.integration)
+    return finish();
+
+  m
+  .size({bufferStream: true}, function (err, size) { 
+    if (err) return finish(err);
+    assert.equal(128, size.width);
+    assert.equal(128, size.height);
+    finish();
+  });
+}

test/gifFrameStream.js

@@ -7,7 +7,7 @@ module.exports = function (_, dir, finish, gm) {
 
   var args = m.args();
   assert.equal('convert', args[0]);
-  assert.equal('-[0]', args[1]);
+  assert.equal('gif:-[0]', args[1]);
 
   if (!gm.integration)
     return finish();

test/resizeAndAutoOrientFromBuffer.js

@@ -14,7 +14,7 @@ module.exports = function (_, dir, finish, gm) {
 
   var args = m.args();
   assert.equal('convert', args[0]);
-  assert.equal('-', args[1]);
+  assert.equal('jpg:-', args[1]);
   assert.equal('-resize', args[2]);
   if (m._options.imageMagick) {
     assert.equal('20%', args[3]);

test/resizeBuffer.js

@@ -13,7 +13,7 @@ module.exports = function (_, dir, finish, gm) {
 
   var args = m.args();
   assert.equal('convert', args[0]);
-  assert.equal('-', args[1]);
+  assert.equal('jpg:-', args[1]);
   assert.equal('-resize', args[2]);
   if (m._options.imageMagick) {
     assert.equal('48%', args[3]);

test/streamerr.js

@@ -7,8 +7,7 @@ module.exports = function (_, dir, finish, gm) {
   // The following invocation should fail, because 'convert' 
   // has no way of interpreting the file.
   gm(
-    svg_file, 
-    './test.svg' // fiction
+    svg_file
     ).options({
       imageMagick: true
   }).setFormat('png').toBuffer(function(err, buffer) {