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34 lines
1.0 KiB
34 lines
1.0 KiB
1 year ago
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'use strict'
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module.exports = prettyError
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function prettyError (err, buf) {
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/* istanbul ignore if */
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if (err.pos == null || err.line == null) return err
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let msg = err.message
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msg += ` at row ${err.line + 1}, col ${err.col + 1}, pos ${err.pos}:\n`
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/* istanbul ignore else */
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if (buf && buf.split) {
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const lines = buf.split(/\n/)
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const lineNumWidth = String(Math.min(lines.length, err.line + 3)).length
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let linePadding = ' '
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while (linePadding.length < lineNumWidth) linePadding += ' '
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for (let ii = Math.max(0, err.line - 1); ii < Math.min(lines.length, err.line + 2); ++ii) {
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let lineNum = String(ii + 1)
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if (lineNum.length < lineNumWidth) lineNum = ' ' + lineNum
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if (err.line === ii) {
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msg += lineNum + '> ' + lines[ii] + '\n'
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msg += linePadding + ' '
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for (let hh = 0; hh < err.col; ++hh) {
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msg += ' '
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}
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msg += '^\n'
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} else {
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msg += lineNum + ': ' + lines[ii] + '\n'
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}
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}
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}
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err.message = msg + '\n'
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return err
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}
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