feat: display environment variables contributed by tools in inline decorations

Author: hverlin

docs/src/content/docs/reference/Settings.md

@@ -163,6 +163,14 @@ Show tool versions in the editor. (requires reload)
 
 ---
 
+##### `mise.showToolEnvVarsDecorations`
+- **Type:** `boolean`
+- **Default:** `true`
+
+Show environment variables contributed by each tool in the editor inline decorations (e.g. `GOBIN`, `GOROOT` for Go).
+
+---
+
 ##### `mise.enableCodeLens`
 - **Type:** `boolean`
 - **Default:** `true`

package.json

@@ -284,6 +284,13 @@
           "default": true,
           "markdownDescription": "Show tool versions in the editor. (requires reload)"
         },
+        "mise.showToolEnvVarsDecorations": {
+          "order": 9.1,
+          "type": "boolean",
+          "title": "Show tool environment variables",
+          "default": true,
+          "markdownDescription": "Show environment variables contributed by each tool in the editor inline decorations (e.g. `GOBIN`, `GOROOT` for Go)."
+        },
         "mise.enableCodeLens": {
           "order": 10,
           "type": "boolean",

src/configuration.ts

@@ -17,6 +17,7 @@ export const CONFIGURATION_FLAGS = {
 	enableCodeLens: "enableCodeLens",
 	enableToolLinks: "enableToolLinks",
 	showToolVersionsDecorations: "showToolVersionsDecorations",
+	showToolEnvVarsDecorations: "showToolEnvVarsDecorations",
 	showOutdatedToolGutterDecorations: "showOutdatedToolGutterDecorations",
 	checkForNewMiseVersion: "checkForNewMiseVersion",
 	updateEnvAutomatically: "updateEnvAutomatically",
@@ -130,6 +131,10 @@ export const shouldShowToolVersionsDecorations = () => {
 	return getConfOrElse(CONFIGURATION_FLAGS.showToolVersionsDecorations, true);
 };
 
+export const shouldShowToolEnvVarsDecorations = () => {
+	return getConfOrElse(CONFIGURATION_FLAGS.showToolEnvVarsDecorations, true);
+};
+
 export const shouldShowOutdatedToolGutterDecorations = () => {
 	return getConfOrElse(
 		CONFIGURATION_FLAGS.showOutdatedToolGutterDecorations,

src/providers/inlineToolDecorator.ts

@@ -2,6 +2,7 @@ import * as vscode from "vscode";
 import {
 	isMiseExtensionEnabled,
 	shouldShowOutdatedToolGutterDecorations,
+	shouldShowToolEnvVarsDecorations,
 	shouldShowToolVersionsDecorations,
 } from "../configuration";
 import type { MiseService } from "../miseService";
@@ -31,10 +32,26 @@ export async function showToolVersionInline(
 	document: vscode.TextDocument,
 	miseService: MiseService,
 ): Promise<void> {
-	const [files, tools] = await Promise.all([
+	const showEnvVars = shouldShowToolEnvVarsDecorations();
+	const [files, tools, envsWithInfo] = await Promise.all([
 		miseService.getCurrentConfigFiles(),
 		miseService.getCurrentTools({ useCache: false }),
+		showEnvVars
+			? miseService.getEnvWithInfo().catch(() => [])
+			: Promise.resolve([]),
 	]);
+
+	const envVarsByTool = new Map<string, string[]>();
+	for (const env of envsWithInfo) {
+		if (env.tool && env.name?.toUpperCase() !== "PATH") {
+			const existing = envVarsByTool.get(env.tool);
+			if (existing) {
+				existing.push(env.name);
+			} else {
+				envVarsByTool.set(env.tool, [env.name]);
+			}
+		}
+	}
 	const currentFile = expandPath(document.uri.fsPath);
 	if (!files.includes(currentFile)) {
 		return;
@@ -130,13 +147,22 @@ export async function showToolVersionInline(
 					}
 				}
 
+				const toolEnvVars = envVarsByTool.get(cleanedToolName);
+				const envSuffix = toolEnvVars?.length
+					? ` → ${toolEnvVars.join(", ")}`
+					: "";
+
 				if (isInline) {
 					if (resolvedInstalled) {
-						annotations.push(`${cleanedToolName}: ${resolvedVersion}`);
+						annotations.push(
+							`${cleanedToolName}: ${resolvedVersion}${envSuffix}`,
+						);
 					}
 				} else {
 					annotations.push(
-						resolvedInstalled ? (resolvedVersion ?? "") : "Not installed",
+						resolvedInstalled
+							? `${resolvedVersion ?? ""}${envSuffix}`
+							: "Not installed",
 					);
 				}
 				usedTools.push(cleanedToolName);