From 2c6964300ec97bce6b52587d8d92faa1ce4f968b Mon Sep 17 00:00:00 2001
From: spalger <spalger@users.noreply.github.com>
Date: Thu, 24 Jun 2021 15:00:41 -0700
Subject: [PATCH] move .git exists check up so that we can avoid mocking it out

---
 .../kbn-optimizer/src/optimizer/cache_keys.ts | 15 ++++++++-----
 .../src/optimizer/get_changes.test.ts         | 22 ++++++++++---------
 .../src/optimizer/get_changes.ts              |  5 -----
 3 files changed, 22 insertions(+), 20 deletions(-)

diff --git a/packages/kbn-optimizer/src/optimizer/cache_keys.ts b/packages/kbn-optimizer/src/optimizer/cache_keys.ts
index d89cb04e9dd12..da06b76327a8b 100644
--- a/packages/kbn-optimizer/src/optimizer/cache_keys.ts
+++ b/packages/kbn-optimizer/src/optimizer/cache_keys.ts
@@ -118,10 +118,6 @@ export interface OptimizerCacheKey {
 }
 
 async function getLastCommit() {
-  if (!Fs.existsSync(Path.join(REPO_ROOT, '.git'))) {
-    return undefined;
-  }
-
   const { stdout } = await execa(
     'git',
     ['log', '-n', '1', '--pretty=format:%H', '--', RELATIVE_DIR],
@@ -133,7 +129,16 @@ async function getLastCommit() {
   return stdout.trim() || undefined;
 }
 
-export async function getOptimizerCacheKey(config: OptimizerConfig) {
+export async function getOptimizerCacheKey(config: OptimizerConfig): Promise<OptimizerCacheKey> {
+  if (!Fs.existsSync(Path.resolve(REPO_ROOT, '.git'))) {
+    return {
+      lastCommit: undefined,
+      modifiedTimes: {},
+      workerConfig: config.getCacheableWorkerConfig(),
+      deletedPaths: [],
+    };
+  }
+
   const [changes, lastCommit] = await Promise.all([
     getChanges(RELATIVE_DIR),
     getLastCommit(),
diff --git a/packages/kbn-optimizer/src/optimizer/get_changes.test.ts b/packages/kbn-optimizer/src/optimizer/get_changes.test.ts
index d8be1917c101b..d3cc5cceefddf 100644
--- a/packages/kbn-optimizer/src/optimizer/get_changes.test.ts
+++ b/packages/kbn-optimizer/src/optimizer/get_changes.test.ts
@@ -7,22 +7,22 @@
  */
 
 jest.mock('execa');
-jest.mock('fs');
 
 import { getChanges } from './get_changes';
+import { REPO_ROOT, createAbsolutePathSerializer } from '@kbn/dev-utils';
 
 const execa: jest.Mock = jest.requireMock('execa');
 
+expect.addSnapshotSerializer(createAbsolutePathSerializer());
+
 it('parses git ls-files output', async () => {
   expect.assertions(4);
 
-  jest.requireMock('fs').existsSync.mockImplementation(() => true);
-
   execa.mockImplementation((cmd, args, options) => {
     expect(cmd).toBe('git');
-    expect(args).toEqual(['ls-files', '-dmt', '--', '/foo/bar/x']);
+    expect(args).toEqual(['ls-files', '-dmt', '--', 'foo/bar/x']);
     expect(options).toEqual({
-      cwd: '/foo/bar/x',
+      cwd: REPO_ROOT,
     });
 
     return {
@@ -37,12 +37,14 @@ it('parses git ls-files output', async () => {
     };
   });
 
-  await expect(getChanges('/foo/bar/x')).resolves.toMatchInlineSnapshot(`
+  const changes = await getChanges('foo/bar/x');
+
+  expect(changes).toMatchInlineSnapshot(`
     Map {
-      "/foo/bar/x/kbn-optimizer/package.json" => "modified",
-      "/foo/bar/x/kbn-optimizer/src/common/bundle.ts" => "modified",
-      "/foo/bar/x/kbn-optimizer/src/common/bundles.ts" => "deleted",
-      "/foo/bar/x/kbn-optimizer/src/get_bundle_definitions.test.ts" => "deleted",
+      <absolute path>/kbn-optimizer/package.json => "modified",
+      <absolute path>/kbn-optimizer/src/common/bundle.ts => "modified",
+      <absolute path>/kbn-optimizer/src/common/bundles.ts => "deleted",
+      <absolute path>/kbn-optimizer/src/get_bundle_definitions.test.ts => "deleted",
     }
   `);
 });
diff --git a/packages/kbn-optimizer/src/optimizer/get_changes.ts b/packages/kbn-optimizer/src/optimizer/get_changes.ts
index a47e2e9caf48f..c5f8abe99c322 100644
--- a/packages/kbn-optimizer/src/optimizer/get_changes.ts
+++ b/packages/kbn-optimizer/src/optimizer/get_changes.ts
@@ -9,7 +9,6 @@
 import Path from 'path';
 
 import execa from 'execa';
-import fs from 'fs';
 
 import { REPO_ROOT } from '@kbn/dev-utils';
 
@@ -21,10 +20,6 @@ export type Changes = Map<string, 'modified' | 'deleted'>;
 export async function getChanges(relativeDir: string) {
   const changes: Changes = new Map();
 
-  if (!fs.existsSync(Path.join(REPO_ROOT, '.git'))) {
-    return changes;
-  }
-
   const { stdout } = await execa('git', ['ls-files', '-dmt', '--', relativeDir], {
     cwd: REPO_ROOT,
   });