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fix(@schematics/angular): retain existing EOL when updating JSON files
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This commit updates the JSON utility to retain the existing EOF when updating files.

(cherry picked from commit 1e364bd)
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alan-agius4 committed Jan 5, 2024
1 parent ed1e130 commit a5c339e
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Showing 2 changed files with 34 additions and 1 deletion.
25 changes: 25 additions & 0 deletions packages/schematics/angular/utility/eol.ts
Original file line number Diff line number Diff line change
@@ -0,0 +1,25 @@
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/

import { EOL } from 'node:os';

const CRLF = '\r\n';
const LF = '\n';

export function getEOL(content: string): string {
const newlines = content.match(/(?:\r?\n)/g);

if (newlines?.length) {
const crlf = newlines.filter((l) => l === CRLF).length;
const lf = newlines.length - crlf;

return crlf > lf ? CRLF : LF;
}

return EOL;
}
10 changes: 9 additions & 1 deletion packages/schematics/angular/utility/json-file.ts
Original file line number Diff line number Diff line change
Expand Up @@ -18,16 +18,22 @@ import {
parseTree,
printParseErrorCode,
} from 'jsonc-parser';
import { getEOL } from './eol';

export type InsertionIndex = (properties: string[]) => number;
export type JSONPath = (string | number)[];

/** @private */
export class JSONFile {
content: string;
private eol: string;

constructor(private readonly host: Tree, private readonly path: string) {
constructor(
private readonly host: Tree,
private readonly path: string,
) {
this.content = this.host.readText(this.path);
this.eol = getEOL(this.content);
}

private _jsonAst: Node | undefined;
Expand Down Expand Up @@ -81,7 +87,9 @@ export class JSONFile {

const edits = modify(this.content, jsonPath, value, {
getInsertionIndex,

formattingOptions: {
eol: this.eol,
insertSpaces: true,
tabSize: 2,
},
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