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Colorize your output using RegEx

Project description


A tool for colorizing the output of a terminal.


ChromaTerm (ct) reads from standard input and highlights according to user-configurable rules. Here's an example using the rules in the included configuration file:

alt text


pip3 install chromaterm

If you have the legacy version of ChromaTerm, be sure to uninstall it first.

# If installed using HomeBrew
brew uninstall chromaterm

# If installed from source
git clone -b legacy
cd ChromaTerm--/src/ && ./configure && make uninstall


By default, ChromaTerm reads a YAML file at ~/.chromatermrc which would have your highlight rules. As an example, run the following:

echo "Jul 14 12:28:19: Message from" | ct

Think of ChromaTerm like grep; just pipe things into it. However, unlike other programs which line-buffer, ct works with interactive applications, like ssh. In fact, I have this in my .bash_profile ssh() { /usr/bin/ssh $* | ct; }.

During installation, the default config file was copied to ~/.chromatermrc; modify it to your liking.

Highlight Rules

All of the highlight rules are placed under the rules array in the configuration file. Here's an example config file:

- description: My first rule colors the foreground
  regex: hello.+world
  color: f#ff0000

- description: Background this time, but just for "there"
  regex: Hey (there), buddy
  color: b#ff0000
  group: 1


Optional. It's purely for your sake.


The RegEx engine used is Python RegEx, not to be confused with the native Python re. It was chosen because it has support for variable-length look-behinds.


The color is a hex string prefixed by b for background (e.g. b#123456) and f for foreground (e.g. f#abcdef).

You can have the foreground and background colored by separating them with a space, like b#123456 f#abcdef.


Optional. By default, the entire match is colored. That can changed to a specific group in the regex.


Please open up an issue (always appreciated).

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