Update: query github API for latest release version

Author: LKedward

.github/workflows/test-workflow.yml

@@ -8,7 +8,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
         use-bootstrap: [false, true]
-        fpm-version: ['v0.1.0']
+        fpm-version: ['v0.1.0','v0.1.1','latest']
 
     steps:
       - name: Checkout
@@ -17,6 +17,7 @@ jobs:
       - name: fpm-setup
         uses: ./ # Uses action in the root directory
         with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
           fpm-version: ${{ matrix.fpm-version }}
           use-bootstrap: ${{ matrix.use-bootstrap }}
 

action.yml

@@ -4,14 +4,18 @@ branding:
   color: purple
   icon: package
 inputs:
+  github-token:
+    description: 'API token needed to fetch latest fpm version'
+    required: false
+    default: 'none'
   use-bootstrap:
     description: 'Whether to use the bootstrap implementation of fpm'
     required: false
     default: false
   fpm-version:
     description: 'The tag of an fpm release'
     required: false
-    default: 'v0.1.0'
+    default: 'latest'
   fpm-repository:
     description: 'Github repository (url) serving fpm releases'
     required: false

index.js

@@ -3,6 +3,7 @@ const tc = require('@actions/tool-cache');
 const io = require('@actions/io');
 const exec = require('@actions/exec');
 const path = require('path');
+const github = require('@actions/github');
 
 // Main entry function
 //
@@ -11,15 +12,36 @@ async function main(){
   try {
 
     // Get inputs
+    const token = core.getInput('github-token');
+
     const useBootstrap = core.getInput('use-bootstrap').toLowerCase() === 'true';
     console.log(`use-boostrap: ${useBootstrap}`);
 
-    const fpmVersion = core.getInput('fpm-version');
+    fpmVersion = core.getInput('fpm-version');
     console.log(`fpm-version: ${fpmVersion}`);
 
     const fpmRepo = core.getInput('fpm-repository');
     console.log(`fpm-repository: ${fpmRepo}`);
 
+    // Get latest version if requested
+    if (fpmVersion === 'latest'){
+     
+      if (token === 'none') {
+        core.setFailed('To fetch the latest fpm version, please supply a github token. Alternatively you can specify the fpm release version manually.');
+      }
+
+      try {
+
+        fpmVersion = await getLatestReleaseVersion(token);
+
+      } catch (error) {
+
+        core.setFailed('Error while querying the latest fpm release version - please check your github token.');
+
+      }
+
+    }
+
     // Build download path
     const fetchPath = fpmRepo + '/releases/download/' + fpmVersion + '/';
     const filename = getFPMFilename(useBootstrap,fpmVersion,process.platform);
@@ -112,6 +134,20 @@ function getFPMFilename(useBootstrap,fpmVersion,platform){
 
 }
 
+// Query github API to find the tag for the latest release
+//
+async function getLatestReleaseVersion(token){
+  
+  const octokit = github.getOctokit(token);
+  
+  const {data: releases} = await octokit.repos.listReleases({
+                            owner:'fortran-lang',
+                            repo:'fpm'});
+
+  return releases[0].tag_name;
+
+}
+
 
 // Call entry function
 main();