Run prettier versions against same source

Author: fisker

.github/actions/main/action.yml

@@ -3,4 +3,4 @@ name: "Prettier regression test"
 description: "Prettier regression test"
 runs:
   using: "node24"
-  main: "../../../build/index.js"
+  main: "../../../src/index.ts"

.github/workflows/main.yml

@@ -20,13 +20,11 @@ jobs:
           git config --global user.email "[email protected]"
           git config --global user.name "GitHub Actions"
       - run: yarn
-      - run: yarn build
-      - name: main action
-        uses: ./.github/actions/main
+      - uses: ./.github/actions/main
         env:
           NODE_AUTH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       - name: Upload Reports
         uses: actions/upload-artifact@v5
         with:
           name: Full reports
-          path: running/reports
+          path: reports

.gitignore

@@ -10,7 +10,6 @@
 !.yarn/sdks
 !.yarn/versions
 .pnp.*
-/build
 log.txt
 /repositories
 /running

.prettierignore

@@ -1,5 +1,4 @@
 /prettier
 /repos/**
-/build
 /cspell.json
 .yarn/**

package.json

@@ -14,8 +14,7 @@
     "lint:prettier": "prettier . --check",
     "lint:tsc": "tsc --noEmit",
     "test": "vitest",
-    "build": "tsc",
-    "execute": "yarn build && node ./build/index.js",
+    "execute": "node ./src/index.ts",
     "add-repository": "node scripts/add-repository.mjs",
     "update-repositories": "node scripts/update-repositories.mjs"
   },

src/constants.ts

@@ -1,7 +1,9 @@
 import path from "path";
 
+const cwd = process.cwd();
+
 export const IS_CI = Boolean(process.env.CI);
-export const cwd = process.cwd();
 export const temporaryDirectory = path.join(cwd, "./running");
 export const repositoriesDirectory = path.join(cwd, "./repositories");
+export const reportsDirectory = path.join(cwd, "./reports");
 export const MAXIMUM_GITHUB_COMMENT_LENGTH = 65536;

src/excute-command.ts

@@ -0,0 +1,50 @@
+import { runPrettier } from "./run-prettier.ts";
+import * as logger from "./logger.ts";
+import { installPrettier } from "./install-prettier.ts";
+import { parseCommand } from "./parse-command.ts";
+import { createTemporaryDirectory, writeFile } from "./utilities.ts";
+import { reportsDirectory } from "./constants.ts";
+import path from "node:path";
+
+export async function executeCommand(commandString: string) {
+  const { alternative, original, repositories } = parseCommand(commandString);
+  const directory = await createTemporaryDirectory();
+
+  // Install Prettier
+  await logger.log("Installing Prettier...");
+  const [alternativePrettier, originalPrettier] = await Promise.all(
+    [original, alternative].map((version) =>
+      installPrettier(version, { cwd: directory }),
+    ),
+  );
+
+  const result = await Promise.all(
+    repositories.map(async (repository, index) => {
+      await logger.log(
+        `[${index + 1}/${repositories.length}] Running Prettier on '${repository.repository}' ...`,
+      );
+
+      const diff = await runPrettier(repository, {
+        cwd: directory,
+        alternative: alternativePrettier,
+        original: originalPrettier,
+      });
+
+      await writeFile(
+        path.join(reportsDirectory, `${repository.directoryName}.diff`),
+        diff,
+      );
+
+      return {
+        repository,
+        diff,
+      };
+    }),
+  );
+
+  return {
+    alternative,
+    original,
+    result,
+  };
+}

src/execute/index.ts

@@ -3,7 +3,7 @@ import { inspect } from "node:util";
 import * as core from "@actions/core";
 import { IS_CI } from "./constants.ts";
 import * as logger from "./logger.ts";
-import { execute } from "./execute/index.ts";
+import { executeCommand } from "./excute-command.ts";
 import { getReport } from "./report.ts";
 import { getIssueComment } from "./get-issue-comment.ts";
 import { uploadToArtifact } from "./artifact.ts";
@@ -40,15 +40,16 @@ async function run() {
     const comment = getIssueComment();
     commandString = comment.body as string;
   } else {
-    await fs.writeFile("log.txt", "");
     commandString = process.argv.splice(2)[0];
   }
 
   if (!commandString) {
     throw new Error("Please enter some commands.");
   }
 
-  const result = await execute(commandString);
+  await logger.log(`Received with command '${commandString}'.`)
+
+  const result = await executeCommand(commandString);
 
   const { title, reports } = getReport(result);