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    <p>Does <code>color_producing_script</code> change its behavior when it's used in a pipe? Try</p> <pre><code>color_producing_script | cat </code></pre> <p>at the command line. It may have an option to force color output even when it is.</p> <p>The Perl script, <code>colorgcc</code>, is specifically checking to see if output is to a non-tty and skipping the colorization if that's the case.</p> <pre><code># Get the terminal type. $terminal = $ENV{"TERM"} || "dumb"; # If it's in the list of terminal types not to color, or if # we're writing to something that's not a tty, don't do color. if (! -t STDOUT || $nocolor{$terminal}) { exec $compiler, @ARGV or die("Couldn't exec"); } </code></pre> <p><strong>Edit:</strong></p> <p>You could modify the script in one or more of the following ways:</p> <ul> <li>comment out the test and make it always produce color output</li> <li>add functionality to support reading an environment variable that sets whether to colorize</li> <li>add functionality to support a color-always option in the <code>~/.colorgccrc</code> configuration file</li> <li>add functionality to support a color-always command line option that you strip before passing the rest of the options to the compiler</li> </ul> <p>You could also use the <a href="http://expect.sourceforge.net/" rel="nofollow"><code>expect</code></a> script <a href="http://expect.sourceforge.net/example/unbuffer.man.html" rel="nofollow"><code>unbuffer</code></a> to create a pseudo-tty like this:</p> <pre><code>unbuffer gcc file.c | cat </code></pre> <p>(where <code>cat</code> is a standin recipient).</p> <p>All of this is based on using <code>colorgcc</code> from the command line. There should be analogs for doing similar things within a Perl script.</p>
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    1. POHow can I pipe from terminal in Perl without losing color?
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    1. USDennis Williamson
    1. USDennis Williamson
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    1. POHow can I pipe from terminal in Perl without losing color?
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    1. COIt does change its behavior. `color_producing_script | cat` produces all black text. Is there a standard bash shell method for "forcing" color through the pipe?
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      1. USAlan Turing
    2. CO@LexFridman: No, each utility, program or script has its own option. The shell has nothing to do with it. Examples: `ls --color=always`, `grep --color=always`, `ack --color`. Is this a script you wrote? Does it use one of these utilities or some other? Can you tell me more about what it does or how it does it?
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      1. USDennis Williamson
    3. COMost languages and operating systems provide for a way to tell whether an output stream is writing to a terminal device. Colorizing scripts have the option of changing their behavior when writing to, say, a file or a pipe.
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