feat: (wip) stub out dep resolver

Author: dominykas

lib/deps.js

@@ -0,0 +1,57 @@
+'use strict';
+
+const { Arborist } = require('@npmcli/arborist');
+const Fs = require('fs');
+const Path = require('path');
+const Tempy = require('tempy');
+
+
+const internals = {};
+
+
+internals.walk = (node, callback) => {
+
+    callback(node);
+
+    if (!node.children) {
+        return;
+    }
+
+    node.children.forEach((child) => {
+
+        internals.walk(child, callback);
+    });
+};
+
+
+exports.resolve = async (packageJson) => {
+
+    // @todo: handle lock files
+
+    const path = Tempy.directory();
+    Fs.writeFileSync(Path.join(path, 'package.json'), JSON.stringify(packageJson, null, '  '));
+
+    const arborist = new Arborist({ path });
+
+    await arborist.buildIdealTree();
+
+    const map = {};
+
+    internals.walk(arborist.idealTree, (node) => {
+
+        if (node === arborist.idealTree) {
+            return;
+        }
+
+        map[node.name] = map[node.name] || new Set();
+        map[node.name].add(node.package.version);
+    });
+
+    const result = {};
+
+    for (const name of Object.keys(map).sort()) {
+        result[name] = [...map[name]];
+    }
+
+    return result;
+};

package.json

@@ -37,11 +37,13 @@
   },
   "dependencies": {
     "@hapi/wreck": "^17.0.0",
+    "@npmcli/arborist": "0.0.0-pre.13",
     "@pkgjs/nv": "0.0.3",
     "git-url-parse": "^11.1.2",
     "js-yaml": "^3.13.1",
     "minimist": "^1.2.5",
     "pacote": "^11.1.0",
-    "simple-git": "^1.131.0"
+    "simple-git": "^1.131.0",
+    "tempy": "^0.5.0"
   }
 }