oh-my-zsh/plugins/colorize/colorize.plugin.zsh

# Plugin for highlighting file content
# Plugin highlights file content based on the filename extension.
# If no highlighting method supported for given extension then it tries 
# guess it by looking for file content.

alias colorize='colorize_via_pygmentize'

colorize_via_pygmentize() {
    if [ ! -x "$(which pygmentize)" ]; then
        echo "package \'pygmentize\' is not installed!"
        return -1
    fi

    if [ $# -eq 0 ]; then
        pygmentize -g $@
    fi

    for FNAME in $@
    do
        filename=$(basename "$FNAME")
        lexer=`pygmentize -N \"$filename\"`
        if [ "Z$lexer" != "Ztext" ]; then
            pygmentize -l $lexer "$FNAME"
        else
            pygmentize -g "$FNAME"
        fi
    done
}