4 files changed, 69 insertions, 11 deletions

diff --git a/editors/code/package.json b/editors/code/package.json
index af0a5c851..7c8b2fbec 100644
--- a/editors/code/package.json
+++ b/editors/code/package.json
@@ -344,6 +344,35 @@
                     "default": null,
                     "description": "Custom cargo runner extension ID."
                 },
+                "rust-analyzer.runnableEnv": {
+                    "anyOf": [
+                        {
+                            "type": "null"
+                        },
+                        {
+                            "type": "array",
+                            "items": {
+                                "type": "object",
+                                "properties": {
+                                    "mask": {
+                                        "type": "string",
+                                        "description": "Runnable name mask"
+                                    },
+                                    "env": {
+                                        "type": "object",
+                                        "description": "Variables in form of { \"key\": \"value\"}"
+                                    }
+                                }
+                            }
+                        },
+                        {
+                            "type": "object",
+                            "description": "Variables in form of { \"key\": \"value\"}"
+                        }
+                    ],
+                    "default": null,
+                    "description": "Environment variables passed to the runnable launched using `Test ` or `Debug` lens or `rust-analyzer.run` command."
+                },
                 "rust-analyzer.inlayHints.enable": {
                     "type": "boolean",
                     "default": true,
diff --git a/editors/code/src/config.ts b/editors/code/src/config.ts
index fc95a7de6..a317aabcb 100644
--- a/editors/code/src/config.ts
+++ b/editors/code/src/config.ts
@@ -5,6 +5,8 @@ export type UpdatesChannel = "stable" | "nightly";
 
 export const NIGHTLY_TAG = "nightly";
 
+export type RunnableEnvCfg = Record<string, string> | [{ mask?: string, env: Record<string, string>; }]
+
 export class Config {
     readonly extensionId = "matklad.rust-analyzer";
 
@@ -114,6 +116,10 @@ export class Config {
         return this.get<string | undefined>("cargoRunner");
     }
 
+    get runnableEnv() {
+        return this.get<RunnableEnvCfg | undefined>("runnableEnv");
+    }
+
     get debug() {
         // "/rustc/<id>" used by suggestions only.
         const { ["/rustc/<id>"]: _, ...sourceFileMap } = this.get<Record<string, string>>("debug.sourceFileMap");
diff --git a/editors/code/src/debug.ts b/editors/code/src/debug.ts
index 61c12dbe0..525d26923 100644
--- a/editors/code/src/debug.ts
+++ b/editors/code/src/debug.ts
@@ -5,9 +5,10 @@ import * as ra from './lsp_ext';
 
 import { Cargo } from './toolchain';
 import { Ctx } from "./ctx";
+import { prepareEnv } from "./run";
 
 const debugOutput = vscode.window.createOutputChannel("Debug");
-type DebugConfigProvider = (config: ra.Runnable, executable: string, sourceFileMap?: Record<string, string>) => vscode.DebugConfiguration;
+type DebugConfigProvider = (config: ra.Runnable, executable: string, env: Record<string, string>, sourceFileMap?: Record<string, string>) => vscode.DebugConfiguration;
 
 export async function makeDebugConfig(ctx: Ctx, runnable: ra.Runnable): Promise<void> {
     const scope = ctx.activeRustEditor?.document.uri;
@@ -92,7 +93,8 @@ async function getDebugConfiguration(ctx: Ctx, runnable: ra.Runnable): Promise<v
     }
 
     const executable = await getDebugExecutable(runnable);
-    const debugConfig = knownEngines[debugEngine.id](runnable, simplifyPath(executable), debugOptions.sourceFileMap);
+    const env = prepareEnv(runnable, ctx.config);
+    const debugConfig = knownEngines[debugEngine.id](runnable, simplifyPath(executable), env, debugOptions.sourceFileMap);
     if (debugConfig.type in debugOptions.engineSettings) {
         const settingsMap = (debugOptions.engineSettings as any)[debugConfig.type];
         for (var key in settingsMap) {
@@ -121,7 +123,7 @@ async function getDebugExecutable(runnable: ra.Runnable): Promise<string> {
     return executable;
 }
 
-function getLldbDebugConfig(runnable: ra.Runnable, executable: string, sourceFileMap?: Record<string, string>): vscode.DebugConfiguration {
+function getLldbDebugConfig(runnable: ra.Runnable, executable: string, env: Record<string, string>, sourceFileMap?: Record<string, string>): vscode.DebugConfiguration {
     return {
         type: "lldb",
         request: "launch",
@@ -130,11 +132,12 @@ function getLldbDebugConfig(runnable: ra.Runnable, executable: string, sourceFil
         args: runnable.args.executableArgs,
         cwd: runnable.args.workspaceRoot,
         sourceMap: sourceFileMap,
-        sourceLanguages: ["rust"]
+        sourceLanguages: ["rust"],
+        env
     };
 }
 
-function getCppvsDebugConfig(runnable: ra.Runnable, executable: string, sourceFileMap?: Record<string, string>): vscode.DebugConfiguration {
+function getCppvsDebugConfig(runnable: ra.Runnable, executable: string, env: Record<string, string>, sourceFileMap?: Record<string, string>): vscode.DebugConfiguration {
     return {
         type: (os.platform() === "win32") ? "cppvsdbg" : "cppdbg",
         request: "launch",
@@ -142,6 +145,7 @@ function getCppvsDebugConfig(runnable: ra.Runnable, executable: string, sourceFi
         program: executable,
         args: runnable.args.executableArgs,
         cwd: runnable.args.workspaceRoot,
-        sourceFileMap: sourceFileMap,
+        sourceFileMap,
+        env,
     };
 }
diff --git a/editors/code/src/run.ts b/editors/code/src/run.ts
index e1430e31f..d7c7c489c 100644
--- a/editors/code/src/run.ts
+++ b/editors/code/src/run.ts
@@ -96,6 +96,28 @@ export class RunnableQuickPick implements vscode.QuickPickItem {
     }
 }
 
+export function prepareEnv(runnable: ra.Runnable, config: Config): Record<string, string> {
+    const env: Record<string, string> = { "RUST_BACKTRACE": "short" };
+
+    if (runnable.args.expectTest) {
+        env["UPDATE_EXPECT"] = "1";
+    }
+
+    if (config.runnableEnv) {
+        if (Array.isArray(config.runnableEnv)) {
+            for (const it of config.runnableEnv) {
+                if (!it.mask || new RegExp(it.mask).test(runnable.label)) {
+                    Object.assign(env, it.env);
+                }
+            }
+        } else {
+            Object.assign(env, config.runnableEnv as Record<string, string>);
+        }
+    }
+
+    return env;
+}
+
 export async function createTask(runnable: ra.Runnable, config: Config): Promise<vscode.Task> {
     if (runnable.kind !== "cargo") {
         // rust-analyzer supports only one kind, "cargo"
@@ -108,16 +130,13 @@ export async function createTask(runnable: ra.Runnable, config: Config): Promise
     if (runnable.args.executableArgs.length > 0) {
         args.push('--', ...runnable.args.executableArgs);
     }
-    const env: { [key: string]: string } = { "RUST_BACKTRACE": "short" };
-    if (runnable.args.expectTest) {
-        env["UPDATE_EXPECT"] = "1";
-    }
+
     const definition: tasks.CargoTaskDefinition = {
         type: tasks.TASK_TYPE,
         command: args[0], // run, test, etc...
         args: args.slice(1),
         cwd: runnable.args.workspaceRoot,
-        env: Object.assign({}, process.env as { [key: string]: string }, env),
+        env: prepareEnv(runnable, config),
     };
 
     const target = vscode.workspace.workspaceFolders![0]; // safe, see main activate()