feat: (wip) stub out dep detector

Author: dominykas

lib/deps.js

@@ -5,6 +5,7 @@ const Fs = require('fs');
 const Path = require('path');
 const Tempy = require('tempy');
 
+const Package = require('./package');
 
 const internals = {};
 
@@ -24,7 +25,10 @@ exports.resolve = async ({ packageJson, lockfile }) => {
 
     const path = Tempy.directory();
     Fs.writeFileSync(Path.join(path, 'package.json'), JSON.stringify(packageJson, null, '  '));
-    Fs.writeFileSync(Path.join(path, 'package-lock.json'), JSON.stringify(lockfile, null, '  '));
+
+    if (lockfile) {
+        Fs.writeFileSync(Path.join(path, 'package-lock.json'), JSON.stringify(lockfile, null, '  '));
+    }
 
     const arborist = new Arborist({ path });
 
@@ -50,3 +54,36 @@ exports.resolve = async ({ packageJson, lockfile }) => {
 
     return result;
 };
+
+internals.tryLoad = (loadFile, filename) => {
+
+    try {
+        return loadFile(filename, { json: 'force' });
+    }
+    catch (err) {
+        if (err.code !== 'ENOENT') {
+            throw err;
+        }
+    }
+};
+
+exports.detect = async ({ packageJson, loadFile }) => {
+
+    const lockfile = (await internals.tryLoad(loadFile, 'package-lock.json')) || (await internals.tryLoad(loadFile, 'npm-shrinkwrap.json'));
+
+    const versions = await exports.resolve({ packageJson, lockfile });
+
+    const support = [];
+
+    for (const packageName of Object.keys(versions)) {
+        try {
+            const { result } = await Package.detect({ packageName });
+            support.push(result);
+        }
+        catch (err) {
+            console.warn(`Failed to detect support for ${packageName}: ${err && err.message}`);
+        }
+    }
+
+    return { support, versions };
+};

lib/index.js

@@ -1,28 +1,15 @@
 'use strict';
 
-const Assert = require('assert');
-
-const Engines = require('./engines');
+const Deps = require('./deps');
 const Package = require('./package');
-const Travis = require('./travis');
 
 exports.detect = async function (what, { deps } = {}) {
 
-    Assert.ok(!deps, '`deps` support not implemented yet');
-
-    const packageInfo = await Package.detect(what);
-
-    const result = {};
-
-    result.name = packageInfo.name;
-    result.version = packageInfo.version;
-    result.commit = await packageInfo.getCommit();
-    result.timestamp = Date.now();
-
-    const travis = await Travis.detect(packageInfo);
-    const engines = await Engines.detect(packageInfo);
+    const { result, meta } = await Package.detect(what);
 
-    Object.assign(result, travis, engines);
+    if (deps) {
+        result.dependencies = await Deps.detect(meta);
+    }
 
     return result;
 };

lib/package.js

@@ -3,7 +3,9 @@
 const Fs = require('fs');
 const { URL } = require('url');
 
+const Engines = require('./engines');
 const Loader = require('./loader');
+const Travis = require('./travis');
 
 
 const internals = {};
@@ -45,14 +47,23 @@ exports.detect = async (what) => {
 
     const packageJson = await loadFile('package.json', { json: 'force' });
 
-    const { name, version } = packageJson;
-
-    return {
-        name,
-        version,
+    const meta = {
         packageJson,
-
         getCommit,
         loadFile
     };
+
+    const result = {};
+
+    result.name = packageJson.name;
+    result.version = packageJson.version;
+    result.commit = await meta.getCommit();
+    result.timestamp = Date.now();
+
+    const travis = await Travis.detect(meta);
+    const engines = await Engines.detect(meta);
+
+    Object.assign(result, travis, engines);
+
+    return { result, meta };
 };