feat: support --enable-proposed-api

Author: DanielleMaywood

src/code-server/README.md

@@ -27,6 +27,7 @@ VS Code in the browser
 | disableTelemetry | Disable telemetry reporting. | boolean | false |
 | disableUpdateCheck | Disable update check. Without this flag, code-server checks every 6 hours against the latest GitHub release and notifies once a week when updates are available. | boolean | false |
 | disableWorkspaceTrust | Disable Workspace Trust feature. This only affects the current session. | boolean | false |
+| enableProposedAPI | Comma-separated list of VS Code extension IDs to enable proposed API features for. | string | - |
 | extensions | Comma-separated list of VS Code extensions to install. Format: 'publisher.extension[@version]' (e.g., 'ms-python.python,ms-azuretools.vscode-docker'). | string | - |
 | host | The address to bind to for the code-server. Use '0.0.0.0' to listen on all interfaces. | string | 127.0.0.1 |
 | locale | Set VS Code display language and language shown on the login page. Format should be an IETF language tag (e.g., 'en', 'fr', 'zh-CN'). | string | - |

src/code-server/devcontainer-feature.json

@@ -65,6 +65,11 @@
             "default": false,
             "description": "Disable Workspace Trust feature. This only affects the current session."
         },
+        "enableProposedAPI": {
+            "type": "string",
+            "default": "",
+            "description": "Comma-separated list of VS Code extension IDs to enable proposed API features for."
+        },
         "extensions": {
             "type": "string",
             "default": "",

src/code-server/install.sh

@@ -98,6 +98,13 @@ for trusted_origin in "${trusted_origins[@]}"; do
     FLAGS+=(--trusted-origins "$trusted_origin")
 done
 
+IFS=',' read -ra proposed_api_extensions <<<"$ENABLEPROPOSEDAPI"
+declare -p proposed_api_extensions
+
+for extension in "${proposed_api_extensions[@]}"; do
+    FLAGS+=(--enable-proposed-api "$extension")
+done
+
 cat > /usr/local/bin/code-server-entrypoint <<EOF
 #!/usr/bin/env bash
 set -e

test/code-server/code-server-enable-proposed-api.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+set -e
+
+# Optional: Import test library bundled with the devcontainer CLI
+source dev-container-features-test-lib
+
+# Feature-specific tests
+check "code-server version" code-server --version
+check "code-server running" pgrep -f 'code-server/lib/node.*/code-server'
+check "code-server listening" lsof -i "@127.0.0.1:8080"
+
+check "code-server enable-proposed-api" grep '"--enable-proposed-api".*"rust-lang.rust-analyzer".*"--enable-proposed-api".*"ms-python.python"' < /usr/local/bin/code-server-entrypoint
+
+# Report results
+reportResults

test/code-server/scenarios.json

@@ -208,5 +208,16 @@
                 "trustedOrigins": ["dev.coder.com", "coder.com"]
             }
         }
+    },
+    "code-server-enable-proposed-api": {
+        "image": "mcr.microsoft.com/devcontainers/base:ubuntu",
+        "features": {
+            "code-server": {
+                "enableProposedAPI": [
+                    "rust-lang.rust-analyzer",
+                    "ms-python.python"
+                ]
+            }
+        }
     }
 }