launch: check prerequisites in a pre-launch task

Fixes microsoft#103708

code-cli.bat

@@ -5,27 +5,17 @@ title VSCode Dev
 
 pushd %~dp0\..
 
-:: Node modules
-if not exist node_modules call yarn
+:: Get electron, compile, built-in extensions
+if "%VSCODE_SKIP_PRELAUNCH%"=="" node build/lib/preLaunch.js
 
 for /f "tokens=2 delims=:," %%a in ('findstr /R /C:"\"nameShort\":.*" product.json') do set NAMESHORT=%%~a
 set NAMESHORT=%NAMESHORT: "=%
 set NAMESHORT=%NAMESHORT:"=%.exe
 set CODE=".build\electron\%NAMESHORT%"
 
-:: Download Electron if needed
-node build\lib\electron.js
-if %errorlevel% neq 0 node .\node_modules\gulp\bin\gulp.js electron
-
 :: Manage built-in extensions
 if "%1"=="--builtin" goto builtin
 
-:: Sync built-in extensions
-node build\lib\builtInExtensions.js
-
-:: Build
-if not exist out yarn compile
-
 :: Configuration
 set ELECTRON_RUN_AS_NODE=1
 set NODE_ENV=development

code-cli.sh

@@ -18,24 +18,17 @@ function code() {
 		CODE=".build/electron/$NAME"
 	fi
 
-	# Node modules
-	test -d node_modules || yarn
-
-	# Get electron
-	yarn electron
+	# Get electron, compile, built-in extensions
+	if [[ -z "${VSCODE_SKIP_PRELAUNCH}" ]]; then
+		node build/lib/preLaunch.js
+	fi
 
 	# Manage built-in extensions
 	if [[ "$1" == "--builtin" ]]; then
 		exec "$CODE" build/builtin
 		return
 	fi
 
-	# Sync built-in extensions
-	node build/lib/builtInExtensions.js
-
-	# Build
-	test -d out || yarn compile
-
 	ELECTRON_RUN_AS_NODE=1 \
 	NODE_ENV=development \
 	VSCODE_DEV=1 \

code.bat

@@ -5,26 +5,17 @@ title VSCode Dev
 
 pushd %~dp0\..
 
-:: Node modules
-if not exist node_modules call yarn
+:: Get electron, compile, built-in extensions
+if "%VSCODE_SKIP_PRELAUNCH%"=="" node build/lib/preLaunch.js
 
 for /f "tokens=2 delims=:," %%a in ('findstr /R /C:"\"nameShort\":.*" product.json') do set NAMESHORT=%%~a
 set NAMESHORT=%NAMESHORT: "=%
 set NAMESHORT=%NAMESHORT:"=%.exe
 set CODE=".build\electron\%NAMESHORT%"
 
-:: Get electron
-call yarn electron
-
 :: Manage built-in extensions
 if "%1"=="--builtin" goto builtin
 
-:: Sync built-in extensions
-node build\lib\builtInExtensions.js
-
-:: Build
-if not exist out yarn compile
-
 :: Configuration
 set NODE_ENV=development
 set VSCODE_DEV=1

code.sh

@@ -24,24 +24,17 @@ function code() {
 		CODE=".build/electron/$NAME"
 	fi
 
-	# Node modules
-	test -d node_modules || yarn
-
-	# Get electron
-	yarn electron
+	# Get electron, compile, built-in extensions
+	if [[ -z "${VSCODE_SKIP_PRELAUNCH}" ]]; then
+		node build/lib/preLaunch.js
+	fi
 
 	# Manage built-in extensions
 	if [[ "$1" == "--builtin" ]]; then
 		exec "$CODE" build/builtin
 		return
 	fi
 
-	# Sync built-in extensions
-	node build/lib/builtInExtensions.js
-
-	# Build
-	test -d out || yarn compile
-
 	# Configuration
 	export NODE_ENV=development
 	export VSCODE_DEV=1