fix bugs

fix

Author: yanamura

.github/workflows/diff.yml

@@ -9,8 +9,8 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - name: Checkout
-        uses: actions/checkout@v2
+      - uses: actions/checkout@v2
+      - run: git fetch --prune --unshallow
       - name: Diff
         id: diff
         uses: ./

dist/index.js

@@ -961,18 +961,33 @@ const core = __webpack_require__(470)
 const exec = __webpack_require__(986)
 
 async function run() {
-    const command = 'changelog=$(git log $(git tag --sort version:refname | tail -n 2 | head -n 1)..$(git tag --sort version:refname | tail -n 1) --merges --reverse --pretty=format:"* %b")'
-    console.log(command)
-
     let output = ''
-
     const options = {};
     options.listeners = {
-    stdout: (data) => {
-        output += data.toString();
+        stdout: (data) => {
+            output += data.toString();
+        }
     }
+
+    const tag_command = 'git tag --sort version:refname'
+    console.log(tag_command)
+    await exec.exec(tag_command, [], options).catch(error => {
+        core.setFailed(error.message)
+    })
+
+    const tags = output.split('\n').filter(Boolean)
+    console.log(tags)
+
+    output = ''
+
+    if (tags.length < 2) {
+        core.setFailed("need more than 2 tags.")
+        return
     }
 
+    const command = `git log ${tags[tags.length - 2]}..${tags[tags.length - 1]} --merges --reverse --pretty=format:"* %b"`
+    console.log(command)
+
     await exec.exec(command, [], options).catch(error => {
         core.setFailed(error.message)
     })
@@ -985,7 +1000,7 @@ async function run() {
 
     console.log(output)
 
-    const setoutput_command = `echo "::set-output name=changelog::${output}"`
+    const setoutput_command = `echo "::set-output name=diff::${output}"`
     exec.exec(setoutput_command).catch(error => {
         core.setFailed(error.message)
     })

index.js

@@ -2,18 +2,33 @@ const core = require('@actions/core')
 const exec = require('@actions/exec')
 
 async function run() {
-    const command = 'changelog=$(git log $(git tag --sort version:refname | tail -n 2 | head -n 1)..$(git tag --sort version:refname | tail -n 1) --merges --reverse --pretty=format:"* %b")'
-    console.log(command)
-
     let output = ''
-
     const options = {};
     options.listeners = {
-    stdout: (data) => {
-        output += data.toString();
+        stdout: (data) => {
+            output += data.toString();
+        }
     }
+
+    const tag_command = 'git tag --sort version:refname'
+    console.log(tag_command)
+    await exec.exec(tag_command, [], options).catch(error => {
+        core.setFailed(error.message)
+    })
+
+    const tags = output.split('\n').filter(Boolean)
+    console.log(tags)
+
+    output = ''
+
+    if (tags.length < 2) {
+        core.setFailed("need more than 2 tags.")
+        return
     }
 
+    const command = `git log ${tags[tags.length - 2]}..${tags[tags.length - 1]} --merges --reverse --pretty=format:"* %b"`
+    console.log(command)
+
     await exec.exec(command, [], options).catch(error => {
         core.setFailed(error.message)
     })