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colorize.lisp
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colorize.lisp
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(defvar *no-color*
(member "--no-color" *posix-argv* :test #'equal))
(defvar *color-error* nil)
(unless *no-color*
(let ((file #-win32 "colorize-control-codes.lisp"
#+win32 "colorize-windows-console.lisp"))
(handler-case (load file)
(error (c)
(setf *color-error*
(format nil "Error while loading ~a:~% ~a"
(enough-namestring file)
c))))))
(defun is-tty ()
(let* ((stream (sb-impl::stream-output-stream *standard-output*))
(fd (and (sb-sys:fd-stream-p stream)
(sb-sys:fd-stream-fd stream))))
(when (integerp fd)
(plusp (sb-unix:unix-isatty fd)))))
(defun present-coloring-error (error)
(format t "~a~%" error)
(format t "Switching off colored output,~%~
it can be turned off by passing --no-color~%~%")
(setf *no-color* t))
(defun output-colored-text (kind text
&key (align 20))
(cond ((or (not (is-tty))
*no-color*)
(write-string text))
(*color-error*
(present-coloring-error *color-error*)
(write-string text))
(t
(handler-case
(case kind
((:unexpected-failure
:leftover-thread
:unhandled-error
:invalid-exit-status)
(%output-colored-text text :red :bold t))
((:unexpected-success)
(%output-colored-text text :green))
(t
(write-string text)))
(error (c)
(present-coloring-error
(format nil "Error while printing colored text:~% ~a"
c))
(write-string text)))))
(write-string (make-string (max 0 (- align (length text)))
:initial-element #\Space)))