1 files changed, 57 insertions, 0 deletions
diff --git a/scripts/check_svg.js b/scripts/check_svg.js
new file mode 100644
index 00000000000..ebc0bd574a4
--- /dev/null
+++ b/scripts/check_svg.js
@@ -0,0 +1,57 @@
+const glob = require('glob');
+const fs = require('fs');
+const SVGOptimizer = require('svgo');
+
+// node check_svg.js [failIfUncompressedSVGFound = true | false]
+const failFlag = process.argv[2];
+const failIfUncompressedSVGFound = failFlag !== undefined ? JSON.parse(failFlag) : true;
+
+const svgo = new SVGOptimizer();
+const globPath = 'app/views/shared/icons/*.svg';
+const globOptions = { mark: true };
+
+function error(err) {
+  console.error(err);
+  process.exit(1);
+}
+
+function saveOptimization(options) {
+  const { filepath, data, originalSize, failIfUncompressed } = options;
+
+  fs.writeFile(filepath, data, (err) => {
+    if (err) {
+      return error(err);
+    }
+
+    const compressedSize = fs.statSync(filepath).size;
+    const wasUncompressed = compressedSize < originalSize;
+    const compression = (100 - ((compressedSize / originalSize) * 100)).toFixed(2);
+
+    if (failIfUncompressed && wasUncompressed) {
+      error(`${filepath} was found to be uncompressed - could be compressed by ${compression}%`);
+    } else {
+      console.log(`${filepath} was compressed by ${compression}%`);
+    }
+  });
+}
+
+function optimize(filepath) {
+  fs.readFile(filepath, 'utf8', (err, data) => {
+    if (err) {
+      return error(err);
+    }
+
+    svgo.optimize(data, (result) => {
+      saveOptimization({
+        filepath,
+        data: result.data,
+        originalSize: fs.statSync(filepath).size,
+        failIfUncompressed: failIfUncompressedSVGFound,
+      });
+    });
+  });
+}
+
+glob(globPath, globOptions, (er, files) => {
+  files.forEach(filepath => optimize(filepath));
+});