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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-14 20:21:34 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-14 20:21:34 +0000
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+# Pygls Playground
+
+![Screenshot of the vscode-playground extension in action](https://user-images.githubusercontent.com/2675694/260591942-b7001a7b-3081-439d-b702-5f8a489856db.png)
+
+This VSCode extension aims to serve two purposes.
+
+- Provide an environment in which you can easily experiment with the pygls framework by trying some of our example servers - or by writing your own
+
+- Provide a minimal example of what it takes to integrate a pygls powered language server into VSCode.
+
+For an example of a more complete VSCode client, including details on how to bundle your Python code with the VSCode extension itself you may also be interested in Microsoft's [template extension for Python tools](https://github.com/microsoft/vscode-python-tools-extension-template).
+
+## Setup
+
+### Install Server Dependencies
+
+Open a terminal in the repository's root directory
+
+1. Create a virtual environment
+ ```
+ python -m venv env
+ ```
+
+1. Install pygls
+ ```
+ python -m pip install -e .
+ ```
+
+### Install Client Dependencies
+
+Open terminal in the same directory as this file and execute following commands:
+
+1. Install node dependencies
+
+ ```
+ npm install
+ ```
+1. Compile the extension
+
+ ```
+ npm run compile
+ ```
+ Alternatively you can run `npm run watch` if you are going to be actively working on the extension itself.
+
+### Run Extension
+
+1. Open this directory in VS Code
+
+1. The playground relies on the [Python extension for VSCode](https://marketplace.visualstudio.com/items?itemName=ms-python.python) for choosing the appropriate Python environment in which to run the example language servers.
+ If you haven't already, you will need to install it and reload the window.
+
+1. Open the Run and Debug view (`ctrl + shift + D`)
+
+1. Select `Launch Client` and press `F5`, this will open a second VSCode window with the `vscode-playground` extension enabled.
+
+1. You will need to make sure that VSCode is using a virtual environment that contains an installation of `pygls`.
+ The `Python: Select Interpreter` command can be used to pick the correct one.
+
+ Alternatively, you can set the `pygls.server.pythonPath` option in the `.vscode/settings.json` file
+
+
+#### Selecting the document language
+
+The default settings for the `pygls-playground` VSCode extension are configured for the `json_server.py` example. In particular the server will only be used for `.json` files.
+
+The `code_actions.py` example is intended to be used with text files (e.g. the provided `sums.txt` file). To use the server with text files change the **Pygls > Client: Document Selector** setting to the following:
+
+```
+"pygls.client.documentSelector": [
+ {
+ "scheme": "file",
+ "language": "plaintext"
+ },
+],
+```
+
+You can find the full list of known language identifiers [here](https://code.visualstudio.com/docs/languages/identifiers#_known-language-identifiers).
+
+#### Debugging the server
+
+To debug the language server set the `pygls.server.debug` option to `true`.
+The server should be restarted and the debugger connect automatically.
+
+You can control the host and port that the debugger uses through the `pygls.server.debugHost` and `pygls.server.debugPort` options.