Adds support for running arbitrary commands via file-based RPC. Designed for

use with voice-control systems such as [Talon](https://talonvoice.com/).

To build it:

To cleanup build:

On startup, creates a directory in the default tmp directory, called

`vscode-command-server-${userName}`, where `${userName}` is the username (`vscode-command-server` on Windows). Then

waits for the `command-server.runCommand` command to be issued, which will

trigger the command server to read the `request.json` file in the communication

directory, execute the command requested there, and write the response to

`response.json`. Note that we write the JSON response on a single line, with a

trailing newline, so that the client can repeatedly try to read the file until

it finds a final newline to indicate that the write is complete.

Note that the command server will refuse to execute a command if the request file is older than 3 seconds.

Requests look as follows:

{

"commandId": "some-command-id",

"args": ["some-argument"]

}

See `Request` and `Response` [types](src/types.ts) for supported request / response parameters.

Upon receiving the above, this extension would run the command

`some-command-id` with argument `"some-argument"`.

If you'd like the server to wait for the command to finish before responding,

pass `waitForFinish=true`.

If you'd like the server to wait for the command to finish and then respond

with the command return value encoded as JSON, pass `expectResponse=true`.

Have a look at

[talon-vscode-command-client](https://github.com/pokey/talon-vscode-command-client).

Contributes the following commands:

- `command-server.runCommand`: Reads from the requests.json file and executes the given command.

| Key | Command |

| ------------------------------------------------------------------ | ----------- |

| <kbd>Ctrl</kbd>/<kbd>Cmd</kbd> + <kbd>Shift</kbd> + <kbd>F17</kbd> | Run command |

Contributes the following settings:

Allows user to specify the allowed commands using glob syntax, eg:

{

"command-server.allowList": ["workbench.*"]

}

Defaults to `["*"]` (allows everything).

Allows user to specify the denied commands using glob syntax, eg:

{

"command-server.denyList": ["workbench.*"]

}

Defaults to `[]` (doesn't deny anything).

- The server won't respond until the extension is loaded. This may be obvious,

but just be aware that if you have other extensions that take a while to

load, the server might not respond for a little while after you load an

editor window until everything is fully loaded.

- There is a very unlikely race condition. If the front VSCode is hung

when you issue a command, and then you switch to another VSCode, and issue a

command, then if the first instance wakes up at the exact right moment it

could execute the command. There is code in the command server that tries to

prevent a background window from inadvertently executing a command, but

VSCode seems to be a bit inconsistent with determining which window has

focus. When this focused window detection fails, it will end up [preventing

correct commands from running](https://github.com/knausj85/knausj_talon/issues/466). Thus, this protection has been disabled by

default, as the scenario it protects against has never been observed in practice. If you do have issues with background windows trying to execute

commands, please file an issue, and we can look into another way to prevent

this from occurring.

See [CHANGELOG.md](CHANGELOG.md).