use latest upload-artifact action, apply PR fixes onto PR head (#14)

* remove node_modules
* update to latest upload-artifact, apply fixes on PR head

.github/workflows/autofix.yml

@@ -0,0 +1,22 @@
+name: autofix.ci  # needed to securely identify the workflow
+
+on:
+  pull_request:
+  push:
+    branches: [ "main" ]
+permissions:
+  contents: read
+
+jobs:
+  autofix:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+      - run: npm ci
+      - run: npm run build
+
+      - uses: autofix-ci/action@d3e591514b99d0fca6779455ff8338516663f7cc

.gitignore

@@ -0,0 +1 @@
+node_modules/

CHANGELOG.md

@@ -0,0 +1 @@
+See https://github.com/autofix-ci/action/releases.

action.yml

@@ -5,7 +5,7 @@ branding:
   color: 'green'
 runs:
   using: 'node20'
-  main: 'index.js'
+  main: 'index.dist.js'
 inputs:
   fail-fast:
     description: 'Cancel all other workflows associated with a commit when fixing it.'

index.ts

@@ -0,0 +1,136 @@
+import {DefaultArtifactClient} from '@actions/artifact'
+import {getInput, isDebug, setFailed, setOutput} from "@actions/core";
+import {exec, getExecOutput} from "@actions/exec";
+import {HttpClient} from "@actions/http-client";
+import {readFile, rm, writeFile} from "fs/promises";
+
+
+async function main() {
+    setOutput('autofix_started', false);
+
+    const event = JSON.parse(
+        await readFile(process.env.GITHUB_EVENT_PATH, {encoding: 'utf8'})
+    );
+    if (isDebug()) {
+        console.log(event);
+    }
+
+    if (process.env.GITHUB_WORKFLOW !== "autofix.ci") {
+        throw `For security reasons, the workflow in which the autofix.ci action is used must be named "autofix.ci".`;
+    }
+
+    await exec("git", ["reset"]);
+
+    await exec("git", ["-c", "core.fileMode=false", "add", "--all"]);
+
+    // Git consistently uses unix-style paths, so we do not need to worry about path conversions.
+    let {stdout} = await getExecOutput("git", ["diff", "--name-only", "--staged", "--no-renames"])
+    if (stdout === "") {
+        console.log("Nothing to do! ✨");
+        return;
+    }
+    let changes = stdout.trim().split("\n");
+    // UX: Already check here if we have forbidden files.
+    // This is truly enforced on the server, but this way we can give a better error message.
+    if (changes.some((path) => path.includes(".github"))) {
+        throw "The autofix.ci action is not allowed to modify the .github directory.";
+    }
+    console.log(`Need to update ${changes.length} files.`);
+
+    // For pull requests, we need to rebase the changes onto the PR head,
+    // see https://github.com/autofix-ci/action/issues/12.
+    if (event.pull_request) {
+        // Create a commit
+        await exec("git", ["config", "user.name", "autofix.ci"]);
+        await exec("git", ["config", "user.email", "noreply@autofix.ci"]);
+        await exec("git", [
+            "commit",
+            "-m", "autofix",
+        ]);
+        let commit_hash = (
+            await getExecOutput("git", ["rev-parse", "HEAD"])
+        ).stdout.trim();
+        if (isDebug()) {
+            await exec("git", ["show", commit_hash]);
+        }
+        // Fetch and check out PR head
+        await exec("git", ["fetch", "--depth=1", "origin", `+refs/pull/${event.pull_request.number}/head`]);
+        await exec("git", ["checkout", "--force", "FETCH_HEAD"]);
+        if (isDebug()) {
+            await exec("git", ["status"]);
+        }
+        // Reapply fixes.
+        await exec("git", ["cherry-pick", "--no-commit", commit_hash]);
+    }
+
+    const fileChanges = {
+        additions: [],
+        deletions: []
+    };
+    await Promise.all(changes.map((async (filename) => {
+        let buf: Buffer;
+        try {
+            buf = await readFile(filename);
+        } catch (e) {
+            fileChanges.deletions.push({path: filename})
+            return;
+        }
+        fileChanges.additions.push({
+            path: filename,
+            contents: buf.toString("base64")
+        });
+    })));
+    if (isDebug()) {
+        console.log(fileChanges);
+    }
+
+    const client = new DefaultArtifactClient();
+
+    const filename = "autofix.json";
+    try {
+        await writeFile(filename, JSON.stringify({
+            version: 1,
+            changes: fileChanges,
+            failFast: getInput("fail-fast") === "true",
+            comment: getInput("comment") || undefined,
+            commitMessage: getInput("commit-message") || undefined,
+        }));
+        await client.uploadArtifact("autofix.ci", [filename], ".", {
+            retentionDays: 1
+        });
+    } finally {
+        await rm(filename, {maxRetries: 3});
+    }
+
+    let url = (
+        "https://api.autofix.ci/fix" +
+        "?owner=" + encodeURIComponent(event.repository.owner.login) +
+        "&repo=" + encodeURIComponent(event.repository.name)
+    )
+    if (event.pull_request) {
+        url += "&pull=" + encodeURIComponent(event.pull_request.number);
+    } else {
+        url += "&branch=" + encodeURIComponent(event.ref.replace(/^refs\/heads\//, ""));
+    }
+
+    const http = new HttpClient("autofix-action/v2");
+    const resp = await http.post(url, null);
+    const body = await resp.readBody();
+    if (resp.message.statusCode === 200) {
+        setFailed("✅ Autofix task started.");
+        setOutput('autofix_started', true);
+    } else {
+        console.log(resp.message.statusCode, body);
+        setFailed(body);
+    }
+    // show the user what needs to be changed.
+    await exec("git", ["diff", "--staged"]);
+}
+
+(async function run() {
+    try {
+        await main();
+    } catch (error) {
+        setFailed(String(error).replace(/^Error: /, ""));
+    }
+})();