Merge pull request #31 from Trim21/master

embedding cache steps by using @actions/cache

Author: asottile

README.md

@@ -24,12 +24,6 @@ jobs:
     steps:
     - uses: actions/checkout@v1
     - uses: actions/setup-python@v1
-    - name: set PY
-      run: echo "::set-env name=PY::$(python -c 'import hashlib, sys;print(hashlib.sha256(sys.version.encode()+sys.executable.encode()).hexdigest())')"
-    - uses: actions/cache@v1
-      with:
-        path: ~/.cache/pre-commit
-        key: pre-commit|${{ env.PY }}|${{ hashFiles('.pre-commit-config.yaml') }}
     - uses: pre-commit/[email protected]
 ```
 

index.js

@@ -1,8 +1,33 @@
+const child_process = require('child_process');
+const crypto = require('crypto');
+const fs = require('fs');
+const os = require('os');
+const path = require('path');
+
+const cache = require('@actions/cache');
 const core = require('@actions/core');
 const exec = require('@actions/exec');
 const github = require('@actions/github');
 const tr = require('@actions/exec/lib/toolrunner');
 
+function hashString(content) {
+    const sha256 = crypto.createHash('sha256');
+    return sha256.update(content).digest('hex');
+}
+
+function getPythonVersion() {
+    const args = ['-c', 'import sys;print(sys.executable+"\\n"+sys.version)'];
+    const res = child_process.spawnSync('python', args);
+    if (res.status !== 0) {
+        throw 'python version check failed';
+    }
+    return res.stdout.toString();
+}
+
+function hashFile(filePath) {
+    return hashString(fs.readFileSync(filePath).toString());
+}
+
 function addToken(url, token) {
     return url.replace(/^https:\/\//, `https://x-access-token:${token}@`);
 }
@@ -22,7 +47,14 @@ async function main() {
     const token = core.getInput('token');
     const pr = github.context.payload.pull_request;
     const push = !!token && !!pr;
+
+    const cachePaths = [path.join(os.homedir(), '.cache', 'pre-commit')];
+    const py = getPythonVersion();
+    const cacheKey = `pre-commit-2-${hashString(py)}-${hashFile('.pre-commit-config.yaml')}`;
+    await cache.restoreCache(cachePaths, cacheKey);
     const ret = await exec.exec('pre-commit', args, {ignoreReturnCode: push});
+    await cache.saveCache(cachePaths, cacheKey);
+
     if (ret && push) {
         // actions do not run on pushes made by actions.
         // need to make absolute sure things are good before pushing

package-lock.json

@@ -1,6 +1,7 @@
 {
   "private": true,
   "dependencies": {
+    "@actions/cache": "*",
     "@actions/core": "*",
     "@actions/exec": "*",
     "@actions/github": "*"