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Show colorized error messages

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This commit is contained in:
Demian Ferreiro
2013-03-01 22:42:26 -03:00
parent 3182475207
commit 55c99dfaec
4 changed files with 23 additions and 10 deletions
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3
src/command.coffee
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@@ -141,7 +141,8 @@ compileScript = (file, input, base) ->
return if CoffeeScript.listeners('failure').length
message = if err instanceof CompilerError
err.prettyMessage file or '[stdin]', input
useColors = process.stdout.isTTY and not process.env.NODE_DISABLE_COLORS
err.prettyMessage file or '[stdin]', input, useColors
else
err.stack or "ERROR: #{err}"

11
src/error.coffee
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@@ -17,12 +17,17 @@ exports.CompilerError = class CompilerError extends Error
# Creates a nice error message like, following the "standard" format
# <filename>:<line>:<col>: <message> plus the line with the error and a marker
# showing where the error is.
prettyMessage: (fileName, code) ->
prettyMessage: (fileName, code, useColors) ->
errorLine = code.split('\n')[@startLine]
start = @startColumn
# Show only the first line on multi-line errors.
end = if @startLine is @endLine then @endColumn else errorLine.length - 1
marker = repeat(' ', start) + repeat('^', end - start + 1)
end = if @startLine is @endLine then @endColumn + 1 else errorLine.length
marker = repeat(' ', start) + repeat('^', end - start)
if useColors
colorize = (str) -> "\x1B[1;31m#{str}\x1B[0m"
errorLine = errorLine[...start] + colorize(errorLine[start...end]) + errorLine[end..]
marker = colorize marker
message = """
#{fileName}:#{@startLine + 1}:#{@startColumn + 1}: error: #{@message}