Use gm instead of phantom to create pngs

package.json

@@ -2,7 +2,13 @@
   "name": "gh-badges",
   "version": "1.3.0",
   "description": "Official Shields.io badge library.",
-  "keywords": ["GitHub", "badge", "SVG", "image", "shields.io"],
+  "keywords": [
+    "GitHub",
+    "badge",
+    "SVG",
+    "image",
+    "shields.io"
+  ],
   "homepage": "http://shields.io",
   "bugs": {
     "url": "https://github.com/badges/shields/issues",
@@ -16,23 +22,25 @@
     "url": "https://github.com/badges/shields"
   },
   "dependencies": {
-    "dot": "~1.0.3",
-    "svgo": "~0.7.1",
-    "pdfkit": "~0.8.0",
-    "phantomjs-prebuilt": "~2.1.13",
-    "request": "~2.75.0",
-    "redis": "~2.6.2",
-    "camp": "~16.2.3",
-    "semver": "~5.3.0",
     "bower": "~1.7.9",
+    "camp": "~16.2.3",
     "chrome-web-store-item-property": "~1.1.2",
+    "dot": "~1.0.3",
+    "gm": "^1.23.0",
     "json-autosave": "~1.1.1",
+    "pdfkit": "~0.8.0",
+    "redis": "~2.6.2",
+    "request": "~2.75.0",
+    "semver": "~5.3.0",
+    "svgo": "~0.7.1",
     "xml2js": "~0.4.16"
   },
   "scripts": {
     "test": "node test/test.js"
   },
-  "bin": { "badge": "./gh-badge.js" },
+  "bin": {
+    "badge": "./gh-badge.js"
+  },
   "files": [
     "badge.js",
     "README.md",
@@ -41,7 +49,6 @@
     "templates",
     "svg-to-img.js",
     "colorscheme.json",
-    "phantomjs-svg2png.js",
     "lru-cache.js",
     "logo"
   ]

phantomjs-svg2png.js

@@ -1,53 +0,0 @@
-var page = require('webpage').create();
-var system = require('system');
-var svg = system.args[1];
-var tmpFile = system.args[2];
-
-// Optional local font loading.
-var fs = require('fs');
-var fontPath = './Verdana.ttf';
-if (fs.isFile(fontPath)) {
-  var fontData = fs.read(fontPath, 'b');
-  btoa(fontData, function(fontBase64) {
-    svg = svg.slice(0, svg.indexOf('</svg>')) + '<style><![CDATA['
-      + '@font-face{font-family:"Verdana";src:url(data:font/ttf;base64,'
-      + fontBase64 + ');}]]></style></svg>';
-    renderSvg(svg);
-  });
-} else { renderSvg(svg); }
-
-function renderSvg(svg) {
-  var svgUrl = 'data:image/svg+xml,' + window.encodeURI(svg);
-  page.viewportSize = getSvgDimensions(svg);
-  page.open(svgUrl, function(status) {
-    if (status !== 'success') {
-      console.error('Failed to load the following SVG data:');
-      console.error(svgUrl);
-      phantom.exit(1);
-    } else {
-      page.render(tmpFile);
-      phantom.exit();
-    }
-  });
-}
-
-function getSvgDimensions(svg) {
-  var frag = window.document.createElement('div');
-  frag.innerHTML = svg;
-  var svgRoot = frag.querySelector('svg');
-  return {
-    width: parseFloat(svgRoot.getAttribute('width') || 80),
-    height: parseFloat(svgRoot.getAttribute('height') || 18)
-  };
-}
-
-function btoa(data, cb) {
-  page.open('about:blank', function(status) {
-    if (status !== 'success') {
-      console.error('Failed to load blank page.');
-      phantom.exit(1);
-    } else {
-      cb(page.evaluate(function(data) { return window.btoa(data); }, data));
-    }
-  });
-}

svg-to-img.js

@@ -1,10 +1,8 @@
+var gm = require('gm');
 var fs = require('fs');
-var os = require('os');
-var path = require('path');
-var phantom = require('phantomjs-prebuilt');
 var LruCache = require('./lru-cache.js');
-var childProcess = require('child_process');
-var phantomScript = path.join(__dirname, 'phantomjs-svg2png.js');
+
+var imageMagick = gm.subClass({ imageMagick: true });
 
 // The following is an arbitrary limit (~1.5MB, 1.5kB/image).
 var imgCache = new LruCache(1000);
@@ -16,28 +14,19 @@ module.exports = function (svg, format, out, cb) {
     (new DataStream(imgCache.get(cacheIndex))).pipe(out);
     return;
   }
-  var tmpFile = path.join(os.tmpdir(),
-      "svg2img-" + (Math.random()*2147483648|0) + "." + format);
-  // Conversion to PNG happens in the phantom script.
-  childProcess.execFile(phantom.path, [phantomScript, svg, tmpFile],
-  function(err, stdout, stderr) {
-    if (stdout) { console.log(stdout); }
-    if (stderr) { console.error(stderr); }
-    if (err != null) { console.error(err.stack); if (cb) { cb(err); } return; }
-    var inStream = fs.createReadStream(tmpFile);
-    var cached = [];
-    inStream.on('data', function(chunk) {
-      cached.push(chunk);
-      out.write(chunk);
-    });
-    // Remove the temporary file after use.
-    inStream.on('end', function() {
-      try { out.end(); } catch(e) {}
-      imgCache.set(cacheIndex, cached);
-      fs.unlink(tmpFile, cb);
-    });
+
+  var buf = new Buffer('<?xml version="1.0" encoding="UTF-8" standalone="yes"?>' + svg);
+  var stream = imageMagick(buf, 'image.' + format)
+  .stream(format, function (err, stdout, stderr) {
+    if (err) { console.error(err); }
+    stdout.pipe(out);
   });
-};
+  stream.on('end', function () {
+    stdout.end();
+    imgCache.set(cacheIndex, [stdout]);
+    cb && cb();
+  });
+}
 
 // Fake stream from the cache.
 var Readable = require('stream').Readable;