🤖 fix: add NON_INTERACTIVE_ENV_VARS to SSHRuntime.exec() (#812)

_Generated with `mux`_

Prevents git operations from blocking on editor/credential prompts when
running in SSH workspaces, matching LocalRuntime behavior.

## Changes
- Import and apply `NON_INTERACTIVE_ENV_VARS` in `SSHRuntime.exec()`
- Add test verifying env vars are set for both runtime types

## Before
`SSHRuntime.exec()` only exported `options.env`, so SSH workspaces could
hang when git tried to open an editor or prompt for credentials.

## After
Both `LocalRuntime` and `SSHRuntime` now apply
`NON_INTERACTIVE_ENV_VARS` (`GIT_EDITOR`, `GIT_TERMINAL_PROMPT`, etc.)
to prevent blocking prompts.

Author: ethanndickson

src/node/runtime/SSHRuntime.ts

@@ -18,6 +18,7 @@ import { RuntimeError as RuntimeErrorClass } from "./Runtime";
 import { EXIT_CODE_ABORTED, EXIT_CODE_TIMEOUT } from "@/common/constants/exitCodes";
 import { log } from "@/node/services/log";
 import { checkInitHookExists, createLineBufferedLoggers, getInitHookEnv } from "./initHook";
+import { NON_INTERACTIVE_ENV_VARS } from "@/common/constants/env";
 import { streamProcessToLogger } from "./streamProcess";
 import { expandTildeForSSH, cdCommandForSSH } from "./tildeExpansion";
 import { getProjectName } from "@/node/utils/runtime/helpers";
@@ -106,11 +107,10 @@ export class SSHRuntime implements Runtime {
     // Add cd command if cwd is specified
     parts.push(cdCommandForSSH(options.cwd));
 
-    // Add environment variable exports
-    if (options.env) {
-      for (const [key, value] of Object.entries(options.env)) {
-        parts.push(`export ${key}=${shescape.quote(value)}`);
-      }
+    // Add environment variable exports (user env first, then non-interactive overrides)
+    const envVars = { ...options.env, ...NON_INTERACTIVE_ENV_VARS };
+    for (const [key, value] of Object.entries(envVars)) {
+      parts.push(`export ${key}=${shescape.quote(value)}`);
     }
 
     // Add the actual command

tests/runtime/runtime.test.ts

@@ -113,6 +113,21 @@ describeIntegration("Runtime integration tests", () => {
           expect(result.stdout.trim()).toBe("test-value");
         });
 
+        test.concurrent("sets NON_INTERACTIVE_ENV_VARS to prevent prompts", async () => {
+          const runtime = createRuntime();
+          await using workspace = await TestWorkspace.create(runtime, type);
+
+          // Verify GIT_TERMINAL_PROMPT is set to 0 (prevents credential prompts)
+          const result = await execBuffered(
+            runtime,
+            'echo "GIT_TERMINAL_PROMPT=$GIT_TERMINAL_PROMPT GIT_EDITOR=$GIT_EDITOR"',
+            { cwd: workspace.path, timeout: 30 }
+          );
+
+          expect(result.stdout).toContain("GIT_TERMINAL_PROMPT=0");
+          expect(result.stdout).toContain("GIT_EDITOR=true");
+        });
+
         test.concurrent("handles empty output", async () => {
           const runtime = createRuntime();
           await using workspace = await TestWorkspace.create(runtime, type);