feat: resolve package repository from registry

Author: dominykas

lib/loader.js

@@ -2,6 +2,8 @@
 
 const Fs = require('fs');
 const GitUrlParse = require('git-url-parse');
+const Package = require('../package.json');
+const Pacote = require('pacote');
 const Path = require('path');
 const Wreck = require('@hapi/wreck');
 
@@ -10,6 +12,17 @@ const Utils = require('./utils');
 const internals = {};
 
 
+internals.createPackageLoader = async (packageName) => {
+
+    const packument = await Pacote.packument(packageName + '@latest', {
+        'fullMetadata': true,
+        'user-agent': `${Package.name}@${Package.version}, see ${Package.homepage}`
+    });
+
+    return internals.createRepositoryLoader(packument.repository.url);
+};
+
+
 internals.createRepositoryLoader = (repository) => {
 
     const parsedRepository = GitUrlParse(repository);
@@ -68,9 +81,15 @@ internals.createPathLoader = async (path) => {
 };
 
 
-exports.create = ({ path, repository }) => {
+exports.create = ({ path, repository, packageName }) => {
+
+    if (repository) {
+        return internals.createRepositoryLoader(repository);
+    }
+
+    if (packageName) {
+        return internals.createPackageLoader(packageName);
+    }
 
-    return repository
-        ? internals.createRepositoryLoader(repository)
-        : internals.createPathLoader(path);
+    return internals.createPathLoader(path);
 };

package.json

@@ -32,6 +32,7 @@
     "@hapi/wreck": "^16.0.1",
     "git-url-parse": "^11.1.2",
     "js-yaml": "^3.13.1",
+    "pacote": "^10.3.1",
     "simple-git": "^1.131.0"
   }
 }

test/index.js

@@ -400,5 +400,53 @@ describe('node-support', () => {
                     .to.reject('Only github.com paths supported, feel free to PR at https://github.com/pkgjs/node-support');
             });
         });
+
+        describe('packageName', () => {
+
+            beforeEach(() => {
+
+                if (!Nock.isActive()) {
+                    Nock.activate();
+                }
+            });
+
+            afterEach(() => {
+
+                Nock.restore();
+                Nock.cleanAll();
+            });
+
+            it('returns node versions from `.travis.yml` in the package repository', async () => {
+
+                listRemoteStub
+                    .returns('9cef39d21ad229dea4b10295f55b0d9a83800b23\tHEAD\n');
+
+                Nock('https://raw.githubusercontent.com')
+                    .get('/pkgjs/node-support/HEAD/package.json')
+                    .reply(200, Fs.readFileSync(Path.join(__dirname, '..', 'package.json')))
+                    .get('/pkgjs/node-support/HEAD/.travis.yml')
+                    .reply(200, Fs.readFileSync(Path.join(__dirname, '..', '.travis.yml')));
+
+                Nock('https://registry.npmjs.org')
+                    .get('/node-support')
+                    .reply(200, Fs.readFileSync(Path.join(__dirname, '..', 'package.json')));
+
+                const result = await NodeSupport.detect({ packageName: 'node-support' });
+
+                expect(listRemoteStub.callCount).to.equal(1);
+                expect(listRemoteStub.args[0]).to.equal([['http://github.com/pkgjs/node-support.git', 'HEAD']]);
+
+                expect(result).to.equal({
+                    name: 'node-support',
+                    version: '0.0.0-development',
+                    commit: '9cef39d21ad229dea4b10295f55b0d9a83800b23',
+                    timestamp: 1580673602000,
+                    travis: {
+                        raw: ['10', '12', '13']
+                    },
+                    engines: '>=10'
+                });
+            });
+        });
     });
 });