fix: create directory if needed

package.json

@@ -22,6 +22,7 @@
   "dependencies": {
     "lodash": "4.17.2",
     "magic-string": "0.17.0",
+    "mkdirp": "0.5.1",
     "moment": "2.17.0"
   },
   "devDependencies": {

src/license-plugin.js

@@ -24,6 +24,7 @@
 
 const fs = require('fs');
 const path = require('path');
+const mkdirp = require('mkdirp');
 const _ = require('lodash');
 const moment = require('moment');
 const MagicString = require('magic-string');
@@ -202,6 +203,9 @@ class LicensePlugin {
     if (output) {
       this.debug(`exporting third-party summary to ${output}`);
 
+      // Create directory if it does not already exist.
+      mkdirp(path.parse(output).dir);
+
       const includePrivate = thirdParty.includePrivate;
       const text = _.chain(this._dependencies)
         .values()

test/license-plugin.spec.js

@@ -527,6 +527,51 @@ describe('LicensePlugin', () => {
     });
   });
 
+  it('should display single dependency and create directory if needed', (done) => {
+    const file = path.join(tmpDir.name, 'output', 'third-party.txt');
+    const instance = new LicensePlugin({
+      thirdParty: {
+        output: file,
+      },
+    });
+
+    instance.addDependency({
+      name: 'foo',
+      version: '1.0.0',
+      description: 'Foo Package',
+      license: 'MIT',
+      private: false,
+      author: {
+        name: 'Mickael Jeanroy',
+        email: 'mickael.jeanroy@gmail.com',
+      },
+    });
+
+    const result = instance.exportThirdParties();
+
+    expect(result).not.toBeDefined();
+
+    fs.readFile(file, 'utf-8', (err, content) => {
+      if (err) {
+        done.fail(err);
+        return;
+      }
+
+      const txt = content.toString();
+      expect(txt).toBeDefined();
+      expect(txt).toEqual(
+        `Name: foo\n` +
+        `Version: 1.0.0\n` +
+        `License: MIT\n` +
+        `Private: false\n` +
+        `Description: Foo Package\n` +
+        `Author: Mickael Jeanroy <mickael.jeanroy@gmail.com>`
+      );
+
+      done();
+    });
+  });
+
   it('should display list of dependencies', (done) => {
     const file = path.join(tmpDir.name, 'third-party.txt');
     const instance = new LicensePlugin({