feat: set default branch automatically (#192)

README.md

@@ -26,7 +26,7 @@ jobs:
         # with:
         #   github_token: ${{ github.token }}
         #   branch: "npm-audit-fix-action/fix"
-        #   default_branch: "master"
+        #   default_branch: <automatically set>
         #   commit_title: "build(deps): npm audit fix"
         #   labels: "dependencies, security"
 ```

action.yml

@@ -13,7 +13,6 @@ inputs:
   default_branch:
     description: "Default branch"
     required: false
-    default: "master"
   commit_title:
     description: "Commit title"
     required: false

dist/index.js

@@ -7126,6 +7126,7 @@ const updateNpm = __webpack_require__(193);
 const aggregateReport = __webpack_require__(599);
 const buildPullRequestBody = __webpack_require__(603);
 const createOrUpdatePullRequest = __webpack_require__(583);
+const getDefaultBranch = __webpack_require__(686);
 const commaSeparatedList = __webpack_require__(604);
 
 /**
@@ -7191,14 +7192,22 @@ async function run() {
       return;
     }
 
-    await core.group("Create or update a pull request", () => {
+    await core.group("Create or update a pull request", async () => {
+      const token = core.getInput("github_token");
+      const repository = getFromEnv("GITHUB_REPOSITORY");
+
+      let baseBranch = core.getInput("default_branch");
+      if (!baseBranch) {
+        baseBranch = await getDefaultBranch({ token, repository });
+      }
+
       return createOrUpdatePullRequest({
         branch: core.getInput("branch"),
-        token: core.getInput("github_token"),
-        defaultBranch: core.getInput("default_branch"),
+        token,
+        baseBranch,
         title: core.getInput("commit_title"),
         body: buildPullRequestBody(report),
-        repository: getFromEnv("GITHUB_REPOSITORY"),
+        repository,
         actor: getFromEnv("GITHUB_ACTOR"),
         email: "actions@github.com",
         labels: commaSeparatedList(core.getInput("labels")),
@@ -8044,21 +8053,21 @@ const github = __webpack_require__(469);
 
 /**
  * @param {{
- *  token: string,
- *  branch: string,
- *  defaultBranch: string,
- *  title: string,
- *  body: string,
- *  repository: string,
- *  actor: string,
- *  email: string,
- *  labels: string[],
+ *   token: string,
+ *   branch: string,
+ *   baseBranch: string,
+ *   title: string,
+ *   body: string,
+ *   repository: string,
+ *   actor: string,
+ *   email: string,
+ *   labels: string[],
  * }} params
  */
 module.exports = async function createOrUpdatePullRequest({
   token,
   branch,
-  defaultBranch,
+  baseBranch,
   title,
   body,
   repository,
@@ -8075,7 +8084,7 @@ module.exports = async function createOrUpdatePullRequest({
     owner,
     repo,
     state: "open",
-    base: defaultBranch,
+    base: baseBranch,
     sort: "updated",
     direction: "desc",
     per_page: 100,
@@ -8105,7 +8114,7 @@ module.exports = async function createOrUpdatePullRequest({
       title,
       body,
       head: branch,
-      base: defaultBranch,
+      base: baseBranch,
     });
     console.log(`The pull request was created successfully: ${newPull.data.html_url}`);
 
@@ -9162,6 +9171,25 @@ function isUnixExecutable(stats) {
 }
 //# sourceMappingURL=io-util.js.map
 
+/***/ }),
+
+/***/ 686:
+/***/ (function(module, __unusedexports, __webpack_require__) {
+
+const github = __webpack_require__(469);
+
+/**
+ * @param {{token: string, repository: string}} params
+ * @returns {Promise<string>}
+ */
+module.exports = async function getDefaultBranch({ token, repository }) {
+  const octokit = github.getOctokit(token);
+  const [owner, repo] = repository.split("/");
+  const res = await octokit.repos.get({ owner, repo });
+  return res.data.default_branch;
+};
+
+
 /***/ }),
 
 /***/ 687:

lib/createOrUpdatePullRequest.js

@@ -3,21 +3,21 @@ const github = require("@actions/github");
 
 /**
  * @param {{
- *  token: string,
- *  branch: string,
- *  defaultBranch: string,
- *  title: string,
- *  body: string,
- *  repository: string,
- *  actor: string,
- *  email: string,
- *  labels: string[],
+ *   token: string,
+ *   branch: string,
+ *   baseBranch: string,
+ *   title: string,
+ *   body: string,
+ *   repository: string,
+ *   actor: string,
+ *   email: string,
+ *   labels: string[],
  * }} params
  */
 module.exports = async function createOrUpdatePullRequest({
   token,
   branch,
-  defaultBranch,
+  baseBranch,
   title,
   body,
   repository,
@@ -34,7 +34,7 @@ module.exports = async function createOrUpdatePullRequest({
     owner,
     repo,
     state: "open",
-    base: defaultBranch,
+    base: baseBranch,
     sort: "updated",
     direction: "desc",
     per_page: 100,
@@ -64,7 +64,7 @@ module.exports = async function createOrUpdatePullRequest({
       title,
       body,
       head: branch,
-      base: defaultBranch,
+      base: baseBranch,
     });
     console.log(`The pull request was created successfully: ${newPull.data.html_url}`);
 

lib/getDefaultBranch.js

@@ -0,0 +1,12 @@
+const github = require("@actions/github");
+
+/**
+ * @param {{token: string, repository: string}} params
+ * @returns {Promise<string>}
+ */
+module.exports = async function getDefaultBranch({ token, repository }) {
+  const octokit = github.getOctokit(token);
+  const [owner, repo] = repository.split("/");
+  const res = await octokit.repos.get({ owner, repo });
+  return res.data.default_branch;
+};

lib/index.js

@@ -7,6 +7,7 @@ const updateNpm = require("./updateNpm");
 const aggregateReport = require("./aggregateReport");
 const buildPullRequestBody = require("./buildPullRequestBody");
 const createOrUpdatePullRequest = require("./createOrUpdatePullRequest");
+const getDefaultBranch = require("./getDefaultBranch");
 const commaSeparatedList = require("./utils/commaSeparatedList");
 
 /**
@@ -72,14 +73,22 @@ async function run() {
       return;
     }
 
-    await core.group("Create or update a pull request", () => {
+    await core.group("Create or update a pull request", async () => {
+      const token = core.getInput("github_token");
+      const repository = getFromEnv("GITHUB_REPOSITORY");
+
+      let baseBranch = core.getInput("default_branch");
+      if (!baseBranch) {
+        baseBranch = await getDefaultBranch({ token, repository });
+      }
+
       return createOrUpdatePullRequest({
         branch: core.getInput("branch"),
-        token: core.getInput("github_token"),
-        defaultBranch: core.getInput("default_branch"),
+        token,
+        baseBranch,
         title: core.getInput("commit_title"),
         body: buildPullRequestBody(report),
-        repository: getFromEnv("GITHUB_REPOSITORY"),
+        repository,
         actor: getFromEnv("GITHUB_ACTOR"),
         email: "actions@github.com",
         labels: commaSeparatedList(core.getInput("labels")),