diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
new file mode 100644
index 00000000..be722041
--- /dev/null
+++ b/.github/workflows/lint.yml
@@ -0,0 +1,18 @@
+name: Build and Analyze
+
+on:
+  pull_request:
+  push:
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/setup-node@v2
+        with:
+          node-version: v14
+      - uses: actions/checkout@v2
+      - run: yarn
+      - run: yarn build
+      - run: yarn format-check
diff --git a/.husky/.gitignore b/.husky/.gitignore
new file mode 100644
index 00000000..31354ec1
--- /dev/null
+++ b/.husky/.gitignore
@@ -0,0 +1 @@
+_
diff --git a/.husky/pre-commit b/.husky/pre-commit
new file mode 100755
index 00000000..33feda64
--- /dev/null
+++ b/.husky/pre-commit
@@ -0,0 +1,3 @@
+#!/bin/sh
+yarn build && git add dist/index.js
+yarn format-check
diff --git a/.prettierignore b/.prettierignore
new file mode 100644
index 00000000..1eae0cf6
--- /dev/null
+++ b/.prettierignore
@@ -0,0 +1,2 @@
+dist/
+node_modules/
diff --git a/.prettierrc.json b/.prettierrc.json
new file mode 100644
index 00000000..1e336995
--- /dev/null
+++ b/.prettierrc.json
@@ -0,0 +1,11 @@
+{
+  "printWidth": 100,
+  "tabWidth": 2,
+  "useTabs": false,
+  "semi": true,
+  "singleQuote": true,
+  "trailingComma": "all",
+  "bracketSpacing": true,
+  "arrowParens": "avoid",
+  "parser": "typescript"
+}
diff --git a/dist/index.js b/dist/index.js
index e884532e..c6d81e52 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -5848,7 +5848,7 @@ if (!core) {
     throw new Error('Module not found: core');
 }
 async function main() {
-    const { eventName, sha, ref, repo: { owner, repo }, payload } = github.context;
+    const { eventName, sha, ref, repo: { owner, repo }, payload, } = github.context;
     const { GITHUB_RUN_ID } = process.env;
     let branch = ref.slice(11);
     let headSha = sha;
@@ -5871,10 +5871,11 @@ async function main() {
     const { data: current_run } = await octokit.actions.getWorkflowRun({
         owner,
         repo,
-        run_id: Number(GITHUB_RUN_ID)
+        run_id: Number(GITHUB_RUN_ID),
     });
     if (workflow_id) {
-        workflow_id.replace(/\s/g, '')
+        workflow_id
+            .replace(/\s/g, '')
             .split(',')
             .forEach(n => workflow_ids.push(n));
     }
@@ -5884,7 +5885,7 @@ async function main() {
     console.log(`Found workflow_id: ${JSON.stringify(workflow_ids)}`);
     await Promise.all(workflow_ids.map(async (workflow_id) => {
         try {
-            const { data: { total_count, workflow_runs } } = await octokit.actions.listWorkflowRuns({
+            const { data: { total_count, workflow_runs }, } = await octokit.actions.listWorkflowRuns({
                 per_page: 100,
                 owner,
                 repo,
@@ -5894,7 +5895,9 @@ async function main() {
             console.log(`Found ${total_count} runs total.`);
             let cancelBefore = new Date(current_run.created_at);
             if (all_but_latest) {
-                const n = workflow_runs.map(run => new Date(run.created_at).getTime()).reduce((a, b) => Math.max(a, b), cancelBefore.getTime());
+                const n = workflow_runs
+                    .map(run => new Date(run.created_at).getTime())
+                    .reduce((a, b) => Math.max(a, b), cancelBefore.getTime());
                 cancelBefore = new Date(n);
             }
             const runningWorkflows = workflow_runs.filter(run => run.id !== current_run.id &&
@@ -5910,7 +5913,7 @@ async function main() {
                 const res = await octokit.actions.cancelWorkflowRun({
                     owner,
                     repo,
-                    run_id: id
+                    run_id: id,
                 });
                 console.log(`Cancel run ${id} responded with status ${res.status}`);
             }
diff --git a/package.json b/package.json
index 2d516591..b83c82e1 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,10 @@
   "main": "dist/index.js",
   "license": "MIT",
   "scripts": {
-    "build": "ncc build src/index.ts --license LICENSES.txt"
+    "build": "ncc build src/index.ts --license LICENSES.txt",
+    "format": "prettier --write '**/*.ts'",
+    "format-check": "prettier --check '**/*.ts'",
+    "prepare": "husky install"
   },
   "dependencies": {
     "@actions/core": "1.2.6",
@@ -12,6 +15,8 @@
   },
   "devDependencies": {
     "@vercel/ncc": "0.27.0",
-    "typescript": "4.1.5"
+    "prettier": "2.2.1",
+    "typescript": "4.1.5",
+    "husky": "6.0.0"
   }
 }
diff --git a/src/index.ts b/src/index.ts
index 578caaf1..bb6783cd 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -10,7 +10,13 @@ if (!core) {
 }
 
 async function main() {
-  const { eventName, sha, ref, repo: { owner, repo }, payload } = github.context;
+  const {
+    eventName,
+    sha,
+    ref,
+    repo: { owner, repo },
+    payload,
+  } = github.context;
   const { GITHUB_RUN_ID } = process.env;
 
   let branch = ref.slice(11);
@@ -35,12 +41,13 @@ async function main() {
   const { data: current_run } = await octokit.actions.getWorkflowRun({
     owner,
     repo,
-    run_id: Number(GITHUB_RUN_ID)
+    run_id: Number(GITHUB_RUN_ID),
   });
 
   if (workflow_id) {
     // The user provided one or more workflow id
-    workflow_id.replace(/\s/g, '')
+    workflow_id
+      .replace(/\s/g, '')
       .split(',')
       .forEach(n => workflow_ids.push(n));
   } else {
@@ -48,50 +55,56 @@ async function main() {
     workflow_ids.push(String(current_run.workflow_id));
   }
   console.log(`Found workflow_id: ${JSON.stringify(workflow_ids)}`);
-  await Promise.all(workflow_ids.map(async (workflow_id) => {
-    try {
-      const { data: { total_count, workflow_runs } } = await octokit.actions.listWorkflowRuns({
-        per_page: 100,
-        owner,
-        repo,
-        // @ts-ignore
-        workflow_id,
-        branch,
-      });
-      console.log(`Found ${total_count} runs total.`);
-      let cancelBefore = new Date(current_run.created_at);
-      if (all_but_latest) {
-        const n = workflow_runs.map(run => new Date(run.created_at).getTime()).reduce((a, b) => Math.max(a, b), cancelBefore.getTime());
-        cancelBefore = new Date(n);
-      }
-      const runningWorkflows = workflow_runs.filter(run =>
-        run.id !== current_run.id &&
-        (ignore_sha || run.head_sha !== headSha) &&
-        run.status !== 'completed' &&
-        new Date(run.created_at) < cancelBefore
-      );
-      if (all_but_latest && new Date(current_run.created_at) < cancelBefore) {
-        // Make sure we cancel this run itself if it's out-of-date.
-        // We must cancel this run last so we can cancel the others first.
-        runningWorkflows.push(current_run);
-      }
-      console.log(`Found ${runningWorkflows.length} runs to cancel.`);
-      for (const {id, head_sha, status, html_url} of runningWorkflows) {
-        console.log('Canceling run: ', {id, head_sha, status, html_url});
-        const res = await octokit.actions.cancelWorkflowRun({
+  await Promise.all(
+    workflow_ids.map(async workflow_id => {
+      try {
+        const {
+          data: { total_count, workflow_runs },
+        } = await octokit.actions.listWorkflowRuns({
+          per_page: 100,
           owner,
           repo,
-          run_id: id
+          // @ts-ignore
+          workflow_id,
+          branch,
         });
-        console.log(`Cancel run ${id} responded with status ${res.status}`);
+        console.log(`Found ${total_count} runs total.`);
+        let cancelBefore = new Date(current_run.created_at);
+        if (all_but_latest) {
+          const n = workflow_runs
+            .map(run => new Date(run.created_at).getTime())
+            .reduce((a, b) => Math.max(a, b), cancelBefore.getTime());
+          cancelBefore = new Date(n);
+        }
+        const runningWorkflows = workflow_runs.filter(
+          run =>
+            run.id !== current_run.id &&
+            (ignore_sha || run.head_sha !== headSha) &&
+            run.status !== 'completed' &&
+            new Date(run.created_at) < cancelBefore,
+        );
+        if (all_but_latest && new Date(current_run.created_at) < cancelBefore) {
+          // Make sure we cancel this run itself if it's out-of-date.
+          // We must cancel this run last so we can cancel the others first.
+          runningWorkflows.push(current_run);
+        }
+        console.log(`Found ${runningWorkflows.length} runs to cancel.`);
+        for (const { id, head_sha, status, html_url } of runningWorkflows) {
+          console.log('Canceling run: ', { id, head_sha, status, html_url });
+          const res = await octokit.actions.cancelWorkflowRun({
+            owner,
+            repo,
+            run_id: id,
+          });
+          console.log(`Cancel run ${id} responded with status ${res.status}`);
+        }
+      } catch (e) {
+        const msg = e.message || e;
+        console.log(`Error while canceling workflow_id ${workflow_id}: ${msg}`);
       }
-      
-    } catch (e) {
-      const msg = e.message || e;
-      console.log(`Error while canceling workflow_id ${workflow_id}: ${msg}`);
-    }
-    console.log('')
-  }));
+      console.log('');
+    }),
+  );
 }
 
 main()
diff --git a/yarn.lock b/yarn.lock
index 0da1ae85..e53b1b64 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -126,6 +126,11 @@ deprecation@^2.0.0, deprecation@^2.3.1:
   resolved "https://registry.yarnpkg.com/deprecation/-/deprecation-2.3.1.tgz#6368cbdb40abf3373b525ac87e4a260c3a700919"
   integrity sha512-xmHIy4F3scKVwMsQ4WnVaS8bHOx0DmVwRywosKhaILI0ywMDWPtBSku2HNxRvF7jtwDRsoEwYQSfbxj8b7RlJQ==
 
+husky@^6.0.0:
+  version "6.0.0"
+  resolved "https://registry.yarnpkg.com/husky/-/husky-6.0.0.tgz#810f11869adf51604c32ea577edbc377d7f9319e"
+  integrity sha512-SQS2gDTB7tBN486QSoKPKQItZw97BMOd+Kdb6ghfpBc0yXyzrddI0oDV5MkDAbuB4X2mO3/nj60TRMcYxwzZeQ==
+
 is-plain-object@^4.0.0:
   version "4.1.1"
   resolved "https://registry.yarnpkg.com/is-plain-object/-/is-plain-object-4.1.1.tgz#1a14d6452cbd50790edc7fdaa0aed5a40a35ebb5"
@@ -143,6 +148,11 @@ once@^1.4.0:
   dependencies:
     wrappy "1"
 
+prettier@2.2.1:
+  version "2.2.1"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.2.1.tgz#795a1a78dd52f073da0cd42b21f9c91381923ff5"
+  integrity sha512-PqyhM2yCjg/oKkFPtTGUojv7gnZAoG80ttl45O6x2Ug/rMJw4wcc9k6aaf2hibP7BGVCCM33gZoGjyvt9mm16Q==
+
 tunnel@0.0.6:
   version "0.0.6"
   resolved "https://registry.yarnpkg.com/tunnel/-/tunnel-0.0.6.tgz#72f1314b34a5b192db012324df2cc587ca47f92c"