snyk-paket-parser/dist/line-parser.js

Generate a dep tree given a collection of manifests

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.parseLines = exports.Line = void 0;
class Line {
    constructor(data, indentation) {
        this.data = data;
        this.indentation = indentation;
    }
}
exports.Line = Line;
function countIndents(line, indent) {
    const spaces = line.match(/^\s*/)[0].length;
    const count = spaces / indent.length;
    if (count % 1 !== 0) {
        throw new Error('Line indentation malformed');
    }
    return count;
}
// On windows machines first symbol of the file sometimes is special
// "ZERO WIDTH NO-BREAK SPACE". Remove it before continue processing because it
// could be counted as a space in `countIndents`.
//
// - https://en.wikipedia.org/wiki/Byte_order_mark
// - https://stackoverflow.com/questions/6784799/what-is-this-char-65279
function removeByteOrderMark(input) {
    if (input.length > 0 && input.charAt(0) === '\uFEFF') {
        return input.substr(1);
    }
    return input;
}
// parse space indented lines into array of Lines
function parseLines(input, indent = '  ' /* two spaces */, lineSeparator = /\r?\n/) {
    const lines = removeByteOrderMark(input).split(lineSeparator);
    const result = [];
    for (const line of lines) {
        const data = line.trim();
        if (data === '') { // GROUPS often separated by blank lines
            continue;
        }
        const indentation = countIndents(line, indent);
        result.push(new Line(data, indentation));
    }
    return result;
}
exports.parseLines = parseLines;
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