From 088ea5442b625837b659fbb4068c5790de0c9feb Mon Sep 17 00:00:00 2001
From: Daniel Stockman <daniel.stockman@gmail.com>
Date: Wed, 1 Aug 2018 17:56:03 -0700
Subject: [PATCH] feat(npm-publish): Add npmPack export

---
 commands/__mocks__/@lerna/npm-publish.js        | 10 ++++++++++
 utils/npm-publish/__tests__/npm-publish.test.js | 12 ++++++++++++
 utils/npm-publish/npm-publish.js                | 10 ++++++++++
 3 files changed, 32 insertions(+)

diff --git a/commands/__mocks__/@lerna/npm-publish.js b/commands/__mocks__/@lerna/npm-publish.js
index 591153daa9..6b2a9c0165 100644
--- a/commands/__mocks__/@lerna/npm-publish.js
+++ b/commands/__mocks__/@lerna/npm-publish.js
@@ -1,5 +1,6 @@
 "use strict";
 
+const packed = new Set();
 const registry = new Map();
 
 // by default, act like a spy that populates registry
@@ -9,6 +10,12 @@ const mockNpmPublish = jest.fn((pkg, tag) => {
   return Promise.resolve();
 });
 
+const mockNpmPack = jest.fn(pkg => {
+  packed.add(pkg.name);
+
+  return Promise.resolve(pkg.tarball);
+});
+
 // a convenient format for assertions
 function order() {
   return Array.from(registry.keys());
@@ -17,8 +24,11 @@ function order() {
 // keep test data isolated
 afterEach(() => {
   registry.clear();
+  packed.clear();
 });
 
 module.exports = mockNpmPublish;
+module.exports.npmPack = mockNpmPack;
 module.exports.order = order;
+module.exports.packed = packed;
 module.exports.registry = registry;
diff --git a/utils/npm-publish/__tests__/npm-publish.test.js b/utils/npm-publish/__tests__/npm-publish.test.js
index e85bad7212..293135b479 100644
--- a/utils/npm-publish/__tests__/npm-publish.test.js
+++ b/utils/npm-publish/__tests__/npm-publish.test.js
@@ -95,4 +95,16 @@ describe("npm-publish", () => {
       );
     });
   });
+
+  describe("npmPack", () => {
+    it("runs npm pack in a package directory", async () => {
+      await npmPublish.npmPack(pkg);
+
+      expect(ChildProcessUtilities.exec).lastCalledWith("npm", ["pack"], {
+        cwd: pkg.location,
+        env: {},
+        pkg,
+      });
+    });
+  });
 });
diff --git a/utils/npm-publish/npm-publish.js b/utils/npm-publish/npm-publish.js
index a3e2469822..906821f293 100644
--- a/utils/npm-publish/npm-publish.js
+++ b/utils/npm-publish/npm-publish.js
@@ -6,6 +6,7 @@ const ChildProcessUtilities = require("@lerna/child-process");
 const getExecOpts = require("@lerna/get-npm-exec-opts");
 
 module.exports = npmPublish;
+module.exports.npmPack = npmPack;
 
 function npmPublish(pkg, tag, { npmClient, registry }) {
   log.silly("npmPublish", tag, pkg.name);
@@ -26,3 +27,12 @@ function npmPublish(pkg, tag, { npmClient, registry }) {
 
   return ChildProcessUtilities.exec(npmClient, args, opts);
 }
+
+function npmPack(pkg) {
+  log.verbose("pack", pkg.name);
+
+  const opts = getExecOpts(pkg);
+  const args = ["pack"];
+
+  return ChildProcessUtilities.exec("npm", args, opts);
+}