Make it possible to specify xcodegen's version

README.md

@@ -21,6 +21,10 @@ The path to the directory where the project should be generated. Defaults to the
 * `use-cache`:
   Use a cache for the xcodegen spec. This will prevent unnecessarily generating the project if nothing has changed
 
+Additionally, the version of xcodegen can be specified:
+
+* `version`:
+  The version of xcodegen to be used. Check <https://github.com/yonaskolb/XcodeGen/releases> for valid options.
 
 ## Example usage
 
@@ -29,6 +33,7 @@ uses: xavierLowmiller/[email protected]
 with:
   spec: project.yaml
   quiet: true
+  version: '2.15.1'
 ```
 
 [xcodegen]: https://github.com/yonaskolb/XcodeGen

action.yml

@@ -15,6 +15,9 @@ inputs:
     description: 'The path to the project spec file. Defaults to project.yml'
   use-cache:
     description: 'Use a cache for the xcodegen spec. This will prevent unnecessarily generating the project if nothing has changed'
+  version:
+    description: 'The version of xcodegen to be used. Check https://github.com/yonaskolb/XcodeGen/releases for valid options.'
+    default: latest
 runs:
   using: 'node12'
   main: 'index.js'

index.js

@@ -13,13 +13,14 @@ try {
 async function installXcodegen() {
   const xcodegenDir = os.homedir() + '/action-xcodegen/'
   const zipFile = xcodegenDir + 'xcodegen.zip'
+  const version = core.getInput('version')
   await exec.exec('curl', [
     '--silent',
     '--create-dirs',
     '--location',
     '--output',
     zipFile,
-    'https://github.com/yonaskolb/XcodeGen/releases/latest/download/xcodegen.zip'
+    `https://github.com/yonaskolb/XcodeGen/releases/download/${version}/xcodegen.zip`
   ])
   await exec.exec('unzip', ['-q', '-o', zipFile], { cwd: xcodegenDir })
   await exec.exec('rm', [zipFile])