test1/.vscode/launch.json

// A launch configuration that compiles the extension and then opens it inside a new window
{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Launch GitLens",
            "type": "extensionHost",
            "request": "launch",
            "runtimeExecutable": "${execPath}",
            "args": ["--extensionDevelopmentPath=${workspaceFolder}"],
            "env": {
                "VSCODE_DEBUGGING_EXTENSION": "gitlens"
            },
            "outFiles": ["${workspaceFolder}/dist/**/*.js"],
            "skipFiles": ["<node_internals>/**/*.js", "**/node_modules/**/*.js", "**/extensions/**/*.js"],
            "smartStep": true,
            "sourceMaps": true
        },
        {
            "name": "Watch & Launch GitLens",
            "type": "extensionHost",
            "request": "launch",
            "runtimeExecutable": "${execPath}",
            "env": {
                "VSCODE_DEBUGGING_EXTENSION": "gitlens"
            },
            "args": ["--extensionDevelopmentPath=${workspaceFolder}"],
            "outFiles": ["${workspaceFolder}/dist/**/*.js"],
            "skipFiles": ["<node_internals>/**/*.js", "**/node_modules/**/*.js", "**/extensions/**/*.js"],
            "smartStep": true,
            "sourceMaps": true,
            "preLaunchTask": "npm: watch"
        }
    ]
}