index.js
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'use strict';
module.exports = makeError;
function makeError(code, message, options) {
var line = options.line;
var column = options.column;
var filename = options.filename;
var src = options.src;
var fullMessage;
var location = line + (column ? ':' + column : '');
if (src && line >= 1 && line <= src.split('\n').length) {
var lines = src.split('\n');
var start = Math.max(line - 3, 0);
var end = Math.min(lines.length, line + 3);
// Error context
var context = lines.slice(start, end).map(function(text, i){
var curr = i + start + 1;
var preamble = (curr == line ? ' > ' : ' ')
+ curr
+ '| ';
var out = preamble + text;
if (curr === line && column > 0) {
out += '\n';
out += Array(preamble.length + column).join('-') + '^';
}
return out;
}).join('\n');
fullMessage = (filename || 'Pug') + ':' + location + '\n' + context + '\n\n' + message;
} else {
fullMessage = (filename || 'Pug') + ':' + location + '\n\n' + message;
}
var err = new Error(fullMessage);
err.code = 'PUG:' + code;
err.msg = message;
err.line = line;
err.column = column;
err.filename = filename;
err.src = src;
err.toJSON = function () {
return {
code: this.code,
msg: this.msg,
line: this.line,
column: this.column,
filename: this.filename
};
};
return err;
}