fix

.github/workflows/main.yml

@@ -1,5 +1,8 @@
 name: generate plantuml
-on: push
+on:
+  push:
+    branches:
+      - master
 jobs:
   generate_plantuml:
     runs-on: ubuntu-latest

dist/index.js

@@ -4402,19 +4402,20 @@ const octokit = new github.GitHub(process.env.GITHUB_TOKEN);
         }
         const treeRes = yield octokit.git.createTree({
             owner, repo, tree,
-            base_tree: commits[0].tree.sha,
+            base_tree: commits[commits.length - 1].commit.tree.sha,
         });
         const createdCommitRes = yield octokit.git.createCommit({
             owner, repo,
             message: `Generate svg files`,
-            parents: [commits[0].sha],
+            parents: [commits[commits.length - 1].sha],
             tree: treeRes.data.sha,
         });
         const updatedRefRes = yield octokit.git.updateRef({
-            owner, repo, ref,
+            owner, repo,
+            ref: ref.replace(/^refs\//, ''),
             sha: createdCommitRes.data.sha,
         });
-        console.log(`${tree.map(t => t.path).join("\n")} Abobe files are generated.`);
+        console.log(`${tree.map(t => t.path).join("\n")}\nAbobe files are generated.`);
     });
 })().catch(e => {
     core.setFailed(e);

src/main.ts

@@ -34,7 +34,6 @@ if (!process.env.GITHUB_TOKEN) {
 const octokit = new github.GitHub(process.env.GITHUB_TOKEN);
 
 (async function main() {
-
     const payload = github.context.payload;
     const ref     = payload.ref;
     if (!payload.repository) {
@@ -89,22 +88,23 @@ const octokit = new github.GitHub(process.env.GITHUB_TOKEN);
 
     const treeRes = await octokit.git.createTree({
         owner, repo, tree,
-        base_tree: commits[0].tree.sha,
+        base_tree: commits[commits.length - 1].commit.tree.sha,
     });
 
     const createdCommitRes = await octokit.git.createCommit({
         owner, repo,
         message: `Generate svg files`,
-        parents: [ commits[0].sha ],
+        parents: [ commits[commits.length - 1].sha ],
         tree: treeRes.data.sha,
     });
 
     const updatedRefRes = await octokit.git.updateRef({
-        owner, repo, ref,
+        owner, repo,
+        ref: ref.replace(/^refs\//, ''),
         sha: createdCommitRes.data.sha,
     });
 
-    console.log(`${tree.map(t => t.path).join("\n")} Abobe files are generated.`);
+    console.log(`${tree.map(t => t.path).join("\n")}\nAbobe files are generated.`);
 })().catch(e => {
     core.setFailed(e);
 });