pipecolor

A terminal filter to colorize output

Description

pipecolor is a terminal filter to colorize output. You can customize the colorize rule by regular expression.

Install

Download from release page, and extract to the directory in PATH.

Alternatively you can install by cargo.

cargo install pipecolor

Usage

pipecolor can receive input through pipe, and colorize the output.

$ cat sample/access_log | pipecolor -c ./sample/pipecolor.toml

Filenames can be specified.

$ pipecolor -c ./sample/pipecolor.toml sample/access_log

Colorize rule

See the example rule sample/pipecolor.toml.

[[formats]]
    name = "httpd"
    pat  = "^(.*?) .*? .*? \\[(.*?)\\] \"(.*?)\" (.*?) .*? \"(.*?)\" \"(.*?)\""
    [[formats.lines]]
        pat  = "^(.*?) .*? .*? \\[(.*?)\\] \".*?\" .*? .*? \".*?\" \"(.*?)\""
        colors = ["White", "LightGreen", "LightBlue", "Green"]
        [[formats.lines.tokens]]
            pat   = "GET"
            colors = ["LightCyan"]
        [[formats.lines.tokens]]
            pat   = "POST"
            colors = ["LightYellow"]
        [[formats.lines.tokens]]
            pat   = "HEAD"
            colors = ["LightMagenta"]

formats.pat is a regular expression to specify a format start. By this, some colorize rules can be switched dynamically.

[[formats]]
    name = "tool A"
    pat  = "^tool A started"
    ...

[[formats]]
    name = "tool B"
    pat  = "^tool B started"
    ...

formats.lines.pat is a regular expression to specify colorize lines. If the expression is matched, the matched line is colorize to colors specified by formats.lines.colors.

formats.lines.colors is an array of colors, the first color is used to colorize the whole line. The rest colors are used to colorize the captured group in the expression. In the example, the whole line is colorized to White, the first group captured by (.*?) is colorized to LightGreen.

formats.lines.tokens specifies the special tokens to be colorized in the matched line.