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d40b1530c7
The typescript-formatter package isn't being maintained (lots of old PRs) and has broken in the most recent version of TS Long term we may explore switching to another formatter, but for now I've hook up the basic formatter logic for our hygiene scripts
85 lines
3 KiB
TypeScript
85 lines
3 KiB
TypeScript
/*---------------------------------------------------------------------------------------------
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* Copyright (c) Microsoft Corporation. All rights reserved.
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* Licensed under the MIT License. See License.txt in the project root for license information.
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*--------------------------------------------------------------------------------------------*/
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import * as fs from 'fs';
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import * as path from 'path';
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import * as ts from 'typescript';
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class LanguageServiceHost implements ts.LanguageServiceHost {
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files: ts.MapLike<ts.IScriptSnapshot> = {};
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addFile(fileName: string, text: string) {
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this.files[fileName] = ts.ScriptSnapshot.fromString(text);
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}
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fileExists(path: string): boolean {
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return !!this.files[path];
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}
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readFile(path: string): string | undefined {
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return this.files[path]?.getText(0, this.files[path]!.getLength());
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}
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// for ts.LanguageServiceHost
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getCompilationSettings = () => ts.getDefaultCompilerOptions();
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getScriptFileNames = () => Object.keys(this.files);
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getScriptVersion = (_fileName: string) => '0';
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getScriptSnapshot = (fileName: string) => this.files[fileName];
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getCurrentDirectory = () => process.cwd();
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getDefaultLibFileName = (options: ts.CompilerOptions) => ts.getDefaultLibFilePath(options);
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}
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const defaults: ts.FormatCodeSettings = {
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baseIndentSize: 0,
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indentSize: 4,
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tabSize: 4,
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indentStyle: ts.IndentStyle.Smart,
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newLineCharacter: '\r\n',
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convertTabsToSpaces: false,
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insertSpaceAfterCommaDelimiter: true,
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insertSpaceAfterSemicolonInForStatements: true,
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insertSpaceBeforeAndAfterBinaryOperators: true,
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insertSpaceAfterConstructor: false,
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insertSpaceAfterKeywordsInControlFlowStatements: true,
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insertSpaceAfterFunctionKeywordForAnonymousFunctions: false,
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insertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis: false,
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insertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets: false,
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insertSpaceAfterOpeningAndBeforeClosingNonemptyBraces: true,
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insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces: false,
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insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces: false,
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insertSpaceAfterTypeAssertion: false,
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insertSpaceBeforeFunctionParenthesis: false,
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placeOpenBraceOnNewLineForFunctions: false,
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placeOpenBraceOnNewLineForControlBlocks: false,
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insertSpaceBeforeTypeAnnotation: false,
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};
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const getOverrides = (() => {
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let value: ts.FormatCodeSettings | undefined;
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return () => {
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value ??= JSON.parse(fs.readFileSync(path.join(__dirname, '..', '..', 'tsfmt.json'), 'utf8'));
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return value;
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};
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})();
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export function format(fileName: string, text: string) {
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const host = new LanguageServiceHost();
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host.addFile(fileName, text);
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const languageService = ts.createLanguageService(host);
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const edits = languageService.getFormattingEditsForDocument(fileName, { ...defaults, ...getOverrides() });
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edits
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.sort((a, b) => a.span.start - b.span.start)
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.reverse()
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.forEach(edit => {
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const head = text.slice(0, edit.span.start);
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const tail = text.slice(edit.span.start + edit.span.length);
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text = `${head}${edit.newText}${tail}`;
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});
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return text;
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}
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