Run the prepare script of git dependencies even if NODE_ENV=production (#7398)

* Run the prepare script of git dependencies even if NODE_ENV=production

When installing a git dependency with the `NODE_ENV` environment variable set to `production`, yarn did not run the `prepare` lifecycle script, because `config.production` would default to true, and then `wrapLifecycle` would skip `prepare`:

https://github.com/yarnpkg/yarn/blob/b6569538de69e0ccd201f0a33f1f5b52f2656f5b/src/cli/commands/install.js#L1202-L1207

This is contrary to npm's behavior and the intent of `GitFetcher#fetchFromInstallAndPack`, which is to install the dependency with its devDependencies and run all the relevant lifecycle scripts (excluding `prepublish`), regardless of the configuration or environment settings of the parent install command.

* Update CHANGELOG.md

* Update CHANGELOG.md

Author: jfirebaugh

CHANGELOG.md

@@ -4,6 +4,10 @@ Please add one entry in this file for each change in Yarn's behavior. Use the sa
 
 ## Master
 
+- Runs the `prepare` lifecycle of git dependencies even if `NODE_ENV` is set to `production`.
+
+  [#7398](https://github.com/yarnpkg/yarn/pull/7398) - [**John Firebaugh**](https://github.com/jfirebaugh)
+
 - Fixes the `postversion` lifecycle method not being called when using `--no-git-tag-version`.
 
   [#7154](https://github.com/yarnpkg/yarn/pull/7154) - [**Hampus Tågerud**](https://github.com/hampustagerud)

__tests__/fetchers.js

@@ -125,6 +125,40 @@ test('GitFetcher.fetch with prepare script', async () => {
   expect(await fs.exists(path.join(dir, 'generated', 'prepublish'))).toBe(false);
 });
 
+test('GitFetcher.fetch with prepare script, NODE_ENV=production', async () => {
+  const NODE_ENV = process.env.NODE_ENV;
+  try {
+    process.env.NODE_ENV = 'production';
+    const dir = await mkdir('git-fetcher-with-prepare');
+    const fetcher = new GitFetcher(
+      dir,
+      {
+        type: 'git',
+        reference: 'https://github.com/Volune/test-js-git-repo',
+        hash: '0e56593e326069ed4bcec8126bb48a1891215c57',
+        registry: 'npm',
+      },
+      await Config.create(),
+    );
+    await fetcher.fetch();
+    const name = (await fs.readJson(path.join(dir, 'package.json'))).name;
+    expect(name).toBe('test-js-git-repo');
+    const dependencyName = (await fs.readJson(path.join(dir, 'dependency-package.json'))).name;
+    expect(dependencyName).toBe('beeper');
+    // The file "prepare.js" is not in "files" list
+    expect(await fs.exists(path.join(dir, 'prepare.js'))).toBe(false);
+    // Check the dependency with a bin script was correctly executed
+    expect(await fs.exists(path.join(dir, 'testscript.output.txt'))).toBe(true);
+    // Check executed lifecycle scripts
+    expect(await fs.exists(path.join(dir, 'generated', 'preinstall'))).toBe(true);
+    expect(await fs.exists(path.join(dir, 'generated', 'install'))).toBe(true);
+    expect(await fs.exists(path.join(dir, 'generated', 'postinstall'))).toBe(true);
+    expect(await fs.exists(path.join(dir, 'generated', 'prepublish'))).toBe(false);
+  } finally {
+    process.env.NODE_ENV = NODE_ENV;
+  }
+});
+
 test('TarballFetcher.fetch', async () => {
   const dir = await mkdir('tarball-fetcher');
   const fetcher = new TarballFetcher(

src/fetchers/git-fetcher.js

@@ -164,6 +164,7 @@ export default class GitFetcher extends BaseFetcher {
           binLinks: true,
           cwd: prepareDirectory,
           disablePrepublish: true,
+          production: false,
         },
         this.reporter,
       ),