Fix errors omitted when in subdirectory

Author: paleite

src/git.test.ts

@@ -54,7 +54,7 @@ describe("getDiffForFile", () => {
     const diffFromFile = getDiffForFile("./mockfile.js", true);
 
     const expectedArguments =
-      'git diff --diff-filter=ACM --staged --unified=0 "1234567"';
+      'git diff --diff-filter=ACM --relative --staged --unified=0 "1234567"';
     expect(
       mockedChildProcess.execSync.mock.calls[
         mockedChildProcess.execSync.mock.calls.length - 1

src/git.ts

@@ -22,6 +22,7 @@ const getDiffForFile = (filePath: string, staged = false): string => {
       "git",
       "diff",
       "--diff-filter=ACM",
+      "--relative",
       staged && "--staged",
       "--unified=0",
       JSON.stringify(process.env.ESLINT_PLUGIN_DIFF_COMMIT ?? "HEAD"),
@@ -47,6 +48,7 @@ const getDiffFileList = (staged = false): string[] => {
       "diff",
       "--diff-filter=ACM",
       "--name-only",
+      "--relative",
       staged && "--staged",
       JSON.stringify(process.env.ESLINT_PLUGIN_DIFF_COMMIT ?? "HEAD"),
     ]