Add substitution for remoteUser

Author: max06

.vscode/launch.json

@@ -14,7 +14,7 @@
             "args": [
                 "up",
                 "--workspace-folder",
-                "${workspaceFolder}/src/test/configs/example", // Edit this example config to test the CLI against a custom configuration.
+                "${workspaceFolder}/test", // Edit this example config to test the CLI against a custom configuration.
                 "--log-level",
                 "debug",
             ],

src/spec-common/variableSubstitution.ts

@@ -15,6 +15,7 @@ export interface SubstitutionContext {
 	localWorkspaceFolder?: string;
 	containerWorkspaceFolder?: string;
 	env: NodeJS.ProcessEnv;
+	remoteUser?: string;
 }
 
 export function substitute<T extends object>(context: SubstitutionContext, value: T): T {
@@ -109,6 +110,9 @@ function replaceWithContext(isWindows: boolean, context: SubstitutionContext, ma
 		case 'containerWorkspaceFolderBasename':
 			return context.containerWorkspaceFolder !== undefined ? path.posix.basename(context.containerWorkspaceFolder) : match;
 
+		case 'remoteUser':
+			return context.remoteUser !== undefined ? context.remoteUser : match;
+
 		default:
 			return match;
 	}

src/spec-node/configContainer.ts

@@ -97,6 +97,7 @@ export async function readDevContainerConfigFile(cliHost: CLIHost, workspace: Wo
 		containerWorkspaceFolder: workspaceConfig.workspaceFolder,
 		configFile,
 		env: cliHost.env,
+		remoteUser: updated.remoteUser
 	}, value);
 	const config: DevContainerConfig = substitute0(updated);
 	if (typeof config.workspaceFolder === 'string') {

test/.devcontainer/Dockerfile

@@ -0,0 +1,9 @@
+# [Source] https://github.com/microsoft/vscode-dev-containers/blob/7a4ef23f4034e2f7ded0d2a306561f36677ced9d/containers/python-3/.devcontainer/Dockerfile
+
+# [Choice] Python version (use -bullseye variants on local arm64/Apple Silicon):
+#   3,          3.10,           3.9,            3.8,            3.7,            3.6,
+#   3-bullseye, 3.10-bullseye,  3.9-bullseye,   3.8-bullseye,   3.7-bullseye,   3.6-bullseye,
+#   3-buster,   3.10-buster,    3.9-buster,     3.8-buster,     3.7-buster,     3.6-buster
+ARG VARIANT=3.11-bullseye
+# dockerfile_lint - ignore
+FROM --platform=amd64 mcr.microsoft.com/vscode/devcontainers/python:${VARIANT} as dev

test/.devcontainer/devcontainer.json

@@ -0,0 +1,19 @@
+{
+	"name": "Demo container",
+	"build": {
+		"dockerfile": "Dockerfile",
+		"context": "..",
+		"args": {
+			// Update 'VARIANT' to pick a Python version: 3, 3.10, 3.9, 3.8, 3.7, 3.6
+			// Append -bullseye or -buster to pin to an OS version.
+			// Use -bullseye variants on local on arm64/Apple Silicon.
+			"VARIANT": "3.11-bullseye",
+			// Options
+			"NODE_VERSION": "lts/*"
+		}
+	},
+	"features": {
+		"./test-feature": {}
+	},
+	"remoteUser": "vscode"
+}

test/.devcontainer/test-feature/devcontainer-feature.json

@@ -0,0 +1,13 @@
+{
+	"$schema": "https://raw.githubusercontent.com/devcontainers/spec/main/schemas/devContainerFeature.schema.json",
+	"id": "test-feature",
+	"name": "test-feature",
+	"description": "Testing a feature",
+	"mounts": [
+		{
+			"source": "test-${devcontainerId}",
+			"target": "/home/${remoteUser}",
+			"type": "volume"
+		}
+	]
+}

test/.devcontainer/test-feature/install.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+echo "I am the install script"