From 4572b3681922b9a1b5ac740697abb30af140476d Mon Sep 17 00:00:00 2001
From: Technote <technote.space@gmail.com>
Date: Sat, 3 Jul 2021 00:48:03 +0900
Subject: [PATCH] feat: add relative option (#157)

---
 __tests__/utils/command.test.ts | 25 +++++++++++++++++++++++++
 action.yml                      |  3 +++
 src/utils/command.ts            |  5 +++++
 3 files changed, 33 insertions(+)

diff --git a/__tests__/utils/command.test.ts b/__tests__/utils/command.test.ts
index 1dffbf6e..2de7a515 100644
--- a/__tests__/utils/command.test.ts
+++ b/__tests__/utils/command.test.ts
@@ -564,6 +564,31 @@ describe('getGitDiff', () => {
       'git diff \'get-diff-action/master..get-diff-action/pull/55/merge\' --shortstat -w -- \'__tests__/main.test.ts\'',
     ]);
   });
+
+  it('should get git diff (relative)', async() => {
+    process.env.GITHUB_WORKSPACE   = '/home/runner/work/my-repo-name/my-repo-name';
+    process.env.INPUT_GITHUB_TOKEN = 'test token';
+    process.env.INPUT_RELATIVE     = 'src/test';
+    const mockExec                 = spyOnSpawn();
+    setChildProcessParams({
+      stdout: (command: string): string => {
+        if (command.startsWith('git diff')) {
+          return 'test.txt';
+        }
+        return '';
+      },
+    });
+
+    expect(await getGitDiff(logger, prContext)).toEqual([
+      {file: 'test.txt', ...emptyDiff},
+    ]);
+    execCalledWith(mockExec, [
+      'git remote add get-diff-action \'https://octocat:test token@github.com/hello/world.git\' || :',
+      'git fetch --no-tags --no-recurse-submodules \'--depth=10000\' get-diff-action \'refs/pull/55/merge:refs/remotes/get-diff-action/pull/55/merge\' \'refs/heads/master:refs/remotes/get-diff-action/master\' || :',
+      'git diff \'get-diff-action/master...get-diff-action/pull/55/merge\' \'--diff-filter=AMRC\' --name-only \'--relative=src/test\' || :',
+      'git diff \'get-diff-action/master...get-diff-action/pull/55/merge\' --shortstat -w -- \'test.txt\'',
+    ]);
+  });
 });
 
 describe('getFileDiff', () => {
diff --git a/action.yml b/action.yml
index 5feadd7a..5f4cead2 100644
--- a/action.yml
+++ b/action.yml
@@ -17,6 +17,9 @@ inputs:
   BASE:
     description: base
     required: false
+  RELATIVE:
+    description: relative filter
+    required: false
   DIFF_FILTER:
     description: Diff filter.
     default: 'AMRC'
diff --git a/src/utils/command.ts b/src/utils/command.ts
index 9eb59636..ea77dc32 100644
--- a/src/utils/command.ts
+++ b/src/utils/command.ts
@@ -12,6 +12,7 @@ const command                    = new Command(new Logger());
 const getRawInput                = (name: string): string => process.env[`INPUT_${name.replace(/ /g, '_').toUpperCase()}`] || '';
 const getDot                     = (): string => getInput('DOT', {required: true});
 const getFilter                  = (): string => getInput('DIFF_FILTER', {required: true});
+const getRelativePath            = (): string => getInput('RELATIVE');
 const getOutputFormatType        = (): string => getRawInput('FORMAT');
 const escapeWhenJsonFormat       = (): boolean => Utils.getBoolValue(getRawInput('ESCAPE_JSON'));
 const getSeparator               = (): string => getRawInput('SEPARATOR');
@@ -89,6 +90,7 @@ export const getGitDiff = async(logger: Logger, context: Context): Promise<Array
   const patterns  = getPatterns();
   const options   = getMatchOptions();
   const filter    = getFilter();
+  const relative  = getRelativePath();
 
   return (await Utils.split((await command.execAsync({
     command: 'git diff',
@@ -96,6 +98,9 @@ export const getGitDiff = async(logger: Logger, context: Context): Promise<Array
       `${getCompareRef(diffInfo.base)}${dot}${getCompareRef(diffInfo.head)}`,
       `--diff-filter=${filter}`,
       '--name-only',
+      ...(relative ? [
+        `--relative=${relative}`,
+      ] : []),
     ],
     cwd: Utils.getWorkspace(),
     suppressError: true,