From be0857fa8fcb8f278f84048e12b5ef35879cd93a Mon Sep 17 00:00:00 2001
From: Erik Sundell <erik.sundell87@gmail.com>
Date: Wed, 19 Nov 2025 15:42:27 +0100
Subject: [PATCH] Plugins: Pass build mode to frontend (#114092)

* pass build mode to frontend

* set buildMode build time using shared plugin webpack conf
---
 packages/grafana-data/src/types/config.ts     |  1 +
 .../grafana-plugin-configs/webpack.config.ts  | 34 ++++++++++++++++++-
 pkg/api/frontendsettings.go                   |  1 +
 pkg/plugins/models.go                         |  1 +
 pkg/plugins/plugins.go                        |  3 ++
 5 files changed, 39 insertions(+), 1 deletion(-)

diff --git a/packages/grafana-data/src/types/config.ts b/packages/grafana-data/src/types/config.ts
index bac0e9d322d..bb7fe29a655 100644
--- a/packages/grafana-data/src/types/config.ts
+++ b/packages/grafana-data/src/types/config.ts
@@ -37,6 +37,7 @@ export type AppPluginConfig = {
   dependencies: PluginDependencies;
   extensions: PluginExtensions;
   moduleHash?: string;
+  buildMode?: string;
 };
 
 export type PreinstalledPlugin = {
diff --git a/packages/grafana-plugin-configs/webpack.config.ts b/packages/grafana-plugin-configs/webpack.config.ts
index 7cc76782449..6f2846b5a97 100644
--- a/packages/grafana-plugin-configs/webpack.config.ts
+++ b/packages/grafana-plugin-configs/webpack.config.ts
@@ -4,7 +4,7 @@ import ForkTsCheckerWebpackPlugin from 'fork-ts-checker-webpack-plugin';
 import path from 'path';
 import ReplaceInFileWebpackPlugin from 'replace-in-file-webpack-plugin';
 import TerserPlugin from 'terser-webpack-plugin';
-import webpack, { type Configuration } from 'webpack';
+import webpack, { type Configuration, type Compiler } from 'webpack';
 import { BundleAnalyzerPlugin } from 'webpack-bundle-analyzer';
 import VirtualModulesPlugin from 'webpack-virtual-modules';
 
@@ -31,6 +31,36 @@ function skipFiles(f: string): boolean {
   return true;
 }
 
+class BuildModeWebpackPlugin {
+  apply(compiler: Compiler) {
+    compiler.hooks.compilation.tap('BuildModeWebpackPlugin', (compilation) => {
+      compilation.hooks.processAssets.tap(
+        {
+          name: 'BuildModeWebpackPlugin',
+          stage: webpack.Compilation.PROCESS_ASSETS_STAGE_ADDITIONS,
+        },
+        async () => {
+          const assets = compilation.getAssets();
+          for (const asset of assets) {
+            if (asset.name.endsWith('plugin.json')) {
+              const pluginJsonString = asset.source.source().toString();
+              const pluginJsonWithBuildMode = JSON.stringify(
+                {
+                  ...JSON.parse(pluginJsonString),
+                  buildMode: compilation.options.mode,
+                },
+                null,
+                4
+              );
+              compilation.updateAsset(asset.name, new webpack.sources.RawSource(pluginJsonWithBuildMode));
+            }
+          }
+        }
+      );
+    });
+  }
+}
+
 export type Env = {
   [key: string]: true | string | Env;
 };
@@ -253,6 +283,8 @@ const config = async (env: Env): Promise<Configuration> => {
           ],
         },
       ]),
+      // Add buildMode to plugin.json
+      new BuildModeWebpackPlugin(),
       ...(env.development
         ? [
             new ForkTsCheckerWebpackPlugin({
diff --git a/pkg/api/frontendsettings.go b/pkg/api/frontendsettings.go
index 2895fd14cf7..3554eb84244 100644
--- a/pkg/api/frontendsettings.go
+++ b/pkg/api/frontendsettings.go
@@ -637,6 +637,7 @@ func (hs *HTTPServer) newAppDTO(ctx context.Context, plugin pluginstore.Plugin,
 		Dependencies:    plugin.Dependencies,
 		ModuleHash:      hs.pluginAssets.ModuleHash(ctx, plugin),
 		Translations:    plugin.Translations,
+		BuildMode:       plugin.BuildMode,
 	}
 
 	if settings.Enabled {
diff --git a/pkg/plugins/models.go b/pkg/plugins/models.go
index e5f3a2c93f2..e546d23b95b 100644
--- a/pkg/plugins/models.go
+++ b/pkg/plugins/models.go
@@ -339,6 +339,7 @@ type AppDTO struct {
 	Dependencies    Dependencies      `json:"dependencies"`
 	ModuleHash      string            `json:"moduleHash,omitempty"`
 	Translations    map[string]string `json:"translations,omitempty"`
+	BuildMode       string            `json:"buildMode,omitempty"`
 }
 
 const (
diff --git a/pkg/plugins/plugins.go b/pkg/plugins/plugins.go
index 16dd8d946f8..2c394dcc632 100644
--- a/pkg/plugins/plugins.go
+++ b/pkg/plugins/plugins.go
@@ -133,6 +133,9 @@ type JSONData struct {
 
 	// List of languages supported by the plugin
 	Languages []string `json:"languages,omitempty"`
+
+	// Build mode of the plugin (set automatically at build time)
+	BuildMode string `json:"buildMode,omitempty"`
 }
 
 func ReadPluginJSON(reader io.Reader) (JSONData, error) {