support reading plugin.json from alternative path

Author: sunker

e2e-version/README.md

@@ -12,6 +12,19 @@ By default, this actions resolves an image for the latest build of the main bran
 
 The maximum number of versions to resolve. Default is 6, 0 means no limit.
 
+### `plugin-path`
+
+Only applies when using `plugin-grafana-dependency` mode without a `grafana-dependency` override. Path to the plugin root directory — the directory that contains the `src/plugin.json` file. Defaults to the repository root. Use this when the plugin is in a subdirectory rather than at the root of the repository.
+
+```yaml
+- name: Resolve Grafana E2E versions
+  id: resolve-versions
+  uses: grafana/plugin-actions/e2e-version@e2e-version/v1.2.1
+  with:
+    version-resolver-type: plugin-grafana-dependency
+    plugin-path: plugin
+```
+
 ### `version-resolver-type`
 
 The action supports two modes.

e2e-version/action.yml

@@ -26,6 +26,10 @@ inputs:
     required: false
     description: 'Optionally, use this input to pass a semver range of supported Grafana versions to test against. This is only used when version-resolver-type is plugin-grafana-dependency. If not provided, the action will try to read grafanaDependency from the plugin.json file.'
     type: string
+  plugin-path:
+    required: false
+    description: 'Only applies when version-resolver-type is plugin-grafana-dependency and grafana-dependency is not set. Path to the plugin root directory containing src/plugin.json. Defaults to the repository root. Useful when the plugin is in a subdirectory (e.g. plugin).'
+    type: string
   limit:
     required: false
     description: 'The maximum number of versions to resolve. Default is 6, 0 means no limit.'

e2e-version/dist/index.js

@@ -8,6 +8,7 @@ const SkipGrafanaDevImageInput = 'skip-grafana-dev-image';
 const SkipGrafanaReact19PreviewImageInput = 'skip-grafana-react-19-preview-image';
 const VersionResolverTypeInput = 'version-resolver-type';
 const GrafanaDependencyInput = 'grafana-dependency';
+const PluginPathInput = 'plugin-path';
 const LimitInput = 'limit';
 const MatrixOutput = 'matrix';
 
@@ -44,6 +45,7 @@ async function run() {
     }
 
     const grafanaDependency = core.getInput(GrafanaDependencyInput);
+    const pluginPath = core.getInput(PluginPathInput);
     const versionResolverType = core.getInput(VersionResolverTypeInput) || VersionResolverTypes.PluginGrafanaDependency;
     const limit = parseInt(core.getInput(LimitInput));
     const availableGrafanaVersions = await getGrafanaStableMinorVersions();
@@ -72,7 +74,7 @@ async function run() {
         break;
       default:
         const pluginDependency =
-          grafanaDependency === '' ? await getPluginGrafanaDependencyFromPluginJson() : grafanaDependency;
+          grafanaDependency === '' ? await getPluginGrafanaDependencyFromPluginJson(pluginPath) : grafanaDependency;
         console.log(`Found version requirement ${pluginDependency}`);
         for (const grafanaVersion of availableGrafanaVersions) {
           if (semver.satisfies(grafanaVersion.version, pluginDependency)) {
@@ -166,8 +168,9 @@ async function getGrafanaStableMinorVersions() {
   return Array.from(latestMinorVersions).map(([_, semver]) => semver);
 }
 
-async function getPluginGrafanaDependencyFromPluginJson() {
-  const file = await fs.readFile(path.resolve(path.join(process.cwd(), 'src'), 'plugin.json'), 'utf8');
+async function getPluginGrafanaDependencyFromPluginJson(pluginPath) {
+  const basePath = pluginPath || process.cwd();
+  const file = await fs.readFile(path.resolve(path.join(basePath, 'src'), 'plugin.json'), 'utf8');
   const json = JSON.parse(file);
   if (!json.dependencies.grafanaDependency) {
     throw new Error('Could not find plugin grafanaDependency');
@@ -182,4 +185,6 @@ module.exports = {
   VersionResolverTypeInput,
   VersionResolverTypes,
   GrafanaDependencyInput,
+  PluginPathInput,
+  LimitInput,
 };

e2e-version/index.js

@@ -1,4 +1,4 @@
-const { run, VersionResolverTypeInput, VersionResolverTypes, GrafanaDependencyInput } = require('./index');
+const { run, VersionResolverTypeInput, VersionResolverTypes, GrafanaDependencyInput, PluginPathInput, LimitInput } = require('./index');
 const mockVersions = require('./mocks/versions');
 const { getInput, getBooleanInput } = require('@actions/core');
 
@@ -48,6 +48,12 @@ describe('plugin-grafana-dependency mode', () => {
       if (name === GrafanaDependencyInput) {
         return t.grafanaDependency;
       }
+      if (name === PluginPathInput) {
+        return '';
+      }
+      if (name === LimitInput) {
+        return '6';
+      }
     });
     getBooleanInput.mockReturnValue(true);
     const images = await run();