@angular-devkit/core/src/logger/indent.js

"use strict";
/**
 * @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
 */
Object.defineProperty(exports, "__esModule", { value: true });
exports.IndentLogger = void 0;
const rxjs_1 = require("rxjs");
const logger_1 = require("./logger");
/**
 * Keep an map of indentation => array of indentations based on the level.
 * This is to optimize calculating the prefix based on the indentation itself. Since most logs
 * come from similar levels, and with similar indentation strings, this will be shared by all
 * loggers. Also, string concatenation is expensive so performing concats for every log entries
 * is expensive; this alleviates it.
 */
const indentationMap = {};
class IndentLogger extends logger_1.Logger {
    constructor(name, parent = null, indentation = '  ') {
        super(name, parent);
        indentationMap[indentation] = indentationMap[indentation] || [''];
        const indentMap = indentationMap[indentation];
        this._observable = this._observable.pipe((0, rxjs_1.map)((entry) => {
            const l = entry.path.filter((x) => !!x).length;
            if (l >= indentMap.length) {
                let current = indentMap[indentMap.length - 1];
                while (l >= indentMap.length) {
                    current += indentation;
                    indentMap.push(current);
                }
            }
            entry.message = indentMap[l] + entry.message.split(/\n/).join('\n' + indentMap[l]);
            return entry;
        }));
    }
}
exports.IndentLogger = IndentLogger;
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