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Add option to configure the number of shake threads #230

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Add option to configure the number of shake threads #230

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7 changes: 7 additions & 0 deletions package.json
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Original file line number Diff line number Diff line change
Expand Up @@ -110,6 +110,13 @@
"default": "off",
"description": "Traces the communication between VSCode and the languageServerHaskell service."
},
"languageServerHaskell.shakeThreads": {
"scope": "machine",
"type": ["integer", "null"],
"default": null,
"description":
"The number of Shake threads to use in ghcide or haskell-language-server. Leave empty for single threaded, or 0 for automatic."
},
"languageServerHaskell.logFile": {
"scope": "resource",
"type": "string",
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10 changes: 9 additions & 1 deletion src/extension.ts
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Expand Up @@ -159,7 +159,7 @@ function activateHieNoCheck(context: ExtensionContext, folder: WorkspaceFolder,
// be absolute.
const serverPath = hieLaunchScript;

const runArgs: string[] = ['--lsp'];
let runArgs: string[] = ['--lsp'];
let debugArgs: string[] = ['--lsp'];

// ghcide does not accept -d and -l params
Expand All @@ -172,6 +172,14 @@ function activateHieNoCheck(context: ExtensionContext, folder: WorkspaceFolder,
debugArgs = debugArgs.concat(['-l', logFile]);
}
}
if (hieVariant === 'ghcide' || hieVariant === 'haskell-language-server') {
const shakeThreads: number | null = workspace.getConfiguration('languageServerHaskell', uri).shakeThreads;
if (shakeThreads !== null) {
const threadsArg = ['-j', shakeThreads.toString()];
runArgs = runArgs.concat(threadsArg);
debugArgs = debugArgs.concat(threadsArg);
}
}

// If the extension is launched in debug mode then the debug server options are used,
// otherwise the run options are used.
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