| 1 | 'use strict';
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| 2 |
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| 3 | class YAMLError extends Error {
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| 4 | constructor(name, pos, code, message) {
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| 5 | super();
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| 6 | this.name = name;
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| 7 | this.code = code;
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| 8 | this.message = message;
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| 9 | this.pos = pos;
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| 10 | }
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| 11 | }
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| 12 | class YAMLParseError extends YAMLError {
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| 13 | constructor(pos, code, message) {
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| 14 | super('YAMLParseError', pos, code, message);
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| 15 | }
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| 16 | }
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| 17 | class YAMLWarning extends YAMLError {
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| 18 | constructor(pos, code, message) {
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| 19 | super('YAMLWarning', pos, code, message);
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| 20 | }
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| 21 | }
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| 22 | const prettifyError = (src, lc) => (error) => {
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| 23 | if (error.pos[0] === -1)
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| 24 | return;
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| 25 | error.linePos = error.pos.map(pos => lc.linePos(pos));
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| 26 | const { line, col } = error.linePos[0];
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| 27 | error.message += ` at line ${line}, column ${col}`;
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| 28 | let ci = col - 1;
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| 29 | let lineStr = src
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| 30 | .substring(lc.lineStarts[line - 1], lc.lineStarts[line])
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| 31 | .replace(/[\n\r]+$/, '');
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| 32 | // Trim to max 80 chars, keeping col position near the middle
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| 33 | if (ci >= 60 && lineStr.length > 80) {
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| 34 | const trimStart = Math.min(ci - 39, lineStr.length - 79);
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| 35 | lineStr = '…' + lineStr.substring(trimStart);
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| 36 | ci -= trimStart - 1;
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| 37 | }
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| 38 | if (lineStr.length > 80)
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| 39 | lineStr = lineStr.substring(0, 79) + '…';
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| 40 | // Include previous line in context if pointing at line start
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| 41 | if (line > 1 && /^ *$/.test(lineStr.substring(0, ci))) {
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| 42 | // Regexp won't match if start is trimmed
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| 43 | let prev = src.substring(lc.lineStarts[line - 2], lc.lineStarts[line - 1]);
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| 44 | if (prev.length > 80)
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| 45 | prev = prev.substring(0, 79) + '…\n';
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| 46 | lineStr = prev + lineStr;
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| 47 | }
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| 48 | if (/[^ ]/.test(lineStr)) {
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| 49 | let count = 1;
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| 50 | const end = error.linePos[1];
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| 51 | if (end && end.line === line && end.col > col) {
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| 52 | count = Math.max(1, Math.min(end.col - col, 80 - ci));
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| 53 | }
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| 54 | const pointer = ' '.repeat(ci) + '^'.repeat(count);
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| 55 | error.message += `:\n\n${lineStr}\n${pointer}\n`;
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| 56 | }
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| 57 | };
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| 58 |
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| 59 | exports.YAMLError = YAMLError;
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| 60 | exports.YAMLParseError = YAMLParseError;
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| 61 | exports.YAMLWarning = YAMLWarning;
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| 62 | exports.prettifyError = prettifyError;
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