Add the validate-config GitHub Action

This will come in handy once the project-specific settings start living
in the `config` branch.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

lib/ci-helper.ts

@@ -56,7 +56,7 @@ export class CIHelper {
 
     public static validateConfig = typia.createValidate<IConfig>();
 
-    protected static getConfigAsGitHubActionInput(): IConfig | undefined {
+    public static getConfigAsGitHubActionInput(): IConfig | undefined {
         if (process.env.GITHUB_ACTIONS !== "true") return undefined;
         const json = core.getInput("config");
         if (!json) return undefined;

validate-config/action.yml

@@ -0,0 +1,13 @@
+name: 'Validate a GitGitGadget configuration'
+description: 'Parses and validates a JSON-formatted string containing a GitGitGadget configuration'
+author: 'Johannes Schindelin'
+inputs:
+  config:
+    description: 'The GitGitGadget configuration to use (see https://github.com/gitgitgadget/gitgitgadget/blob/HEAD/lib/project-config.ts)'
+    default: '' # sadly, ${{ vars.CONFIG }} does not work, and documentation about what contexts are permissible here is sorely missing
+runs:
+  using: 'node20'
+  main: './index.js'
+branding:
+  icon: 'git-commit'
+  color: 'orange'

validate-config/index.js

@@ -0,0 +1,15 @@
+async function run() {
+  const { CIHelper } = await import("../dist/index.js")
+
+  try {
+    const config = CIHelper.getConfigAsGitHubActionInput()
+    console.log(
+      `This is a valid GitGitGadget configuration:\n${JSON.stringify(config, null, 2)}`,
+    )
+  } catch (e) {
+    console.error(e)
+    process.exitCode = 1
+  }
+}
+
+run()