Implement zip step

.gitignore

@@ -3,3 +3,4 @@
 
 cache/
 book/
+Worm.epub

lib/worm-scraper.js

@@ -8,6 +8,7 @@ const packageJson = require("../package.json");
 const download = require("./download.js");
 const convert = require("./convert.js");
 const scaffold = require("./scaffold.js");
+const zip = require("./zip.js");
 
 require("./track-rejections.js");
 
@@ -83,7 +84,7 @@ if (argv._.indexOf("scaffold") !== -1) {
 
 if (argv._.indexOf("zip") !== -1) {
   commands.push(function () {
-    console.log("Not yet implemented!");
+    return zip(bookPath, contentPath, path.resolve(argv.out));
   });
 }
 

lib/zip.js

@@ -0,0 +1,30 @@
+"use strict";
+const fs = require("fs");
+const path = require("path");
+const archiver = require("archiver");
+
+module.exports = function (bookPath, contentPath, outPath) {
+  return new Promise(function (resolve, reject) {
+    console.log(`Zipping up ${bookPath} into an EPUB`);
+
+    const archive = archiver("zip");
+    const destStream = fs.createWriteStream(outPath);
+
+    destStream.on("close", function () {
+      console.log(`EPUB written to ${outPath} (${archive.pointer()} bytes)`);
+      resolve();
+    });
+
+    archive.on("error", reject);
+    destStream.on("error", reject);
+
+    archive.pipe(destStream);
+
+    // Order matters; mimetype must be first for a valid EPUB
+    archive.file(path.resolve(bookPath, "mimetype"), { name: "mimetype" });
+    archive.directory(contentPath, "OEBPS", { name: "OEBPS" });
+    archive.directory(path.resolve(bookPath, "META-INF"), "META-INF", { name: "META-INF" });
+
+    archive.finalize();
+  });
+};

package.json

@@ -19,6 +19,7 @@
     "lint": "eslint lib && jscs lib"
   },
   "dependencies": {
+    "archiver": "^0.14.4",
     "cpr": "^0.4.0",
     "jsdom": "^5.3.0",
     "mkdirp-then": "^1.0.1",