gen-theme.rc

#!/usr/bin/env rc
# by Jakukyo Friel <weakish@gmail.com> under GPL v2.

# Generate Solarized dark theme for roxterm.
# Works with both plan9 rc (plan9 unix port)
# and Byron Rakitzis' reimplementation.
# Tested with GNU grep/sed.
#
# Usage:
# Run it under the root of the solarized main repo.
# (At least make sure solarized README.md is under the current dir.)
#
#     solarized% /path/to/gen_theme.rc > solarized-dark
#
# If you'd like to generate a light theme, alter the value of
# foreground, background and cursor (directly edit this script
# or edit the theme file afterwards).


fn gen_color_values {
  cat README.md |
# extract the table
  sed -n '/    SOLARIZED HEX/,/Usage & Development/p' |
  sed -n '/    base03/,/    green/p' |
# extract required fields
  grep -oE '^    [a-z0-9]+[ ]+#[0-9a-f]{6}[ ]+[0-9]{1,2}/' 
}

# #abcdef -> #aabbccddeeff
fn convert_hex {
  sed -r 's/#([0-9a-f]{2})([0-9a-f]{2})([0-9a-f]{2})/#\1\1\2\2\3\3/'
}

fn extract_color_value {
  gen_color_values |
# Use $1^' ' to distinguish among base0/base01/base02/base03, etc.
  grep $1^' ' | grep -oE '#[^ ]+' | convert_hex
}

fn gen_header {
  echo '[roxterm colour scheme]'
  echo 'foreground='^`{extract_color_value base0}
  echo 'background='^`{extract_color_value base03}
}

fn gen_colormap {
  gen_color_values |
  grep -oE '#[^/]+' |
# sort from 0 to 15
  sort -nk 2 |
# '#073642 0' -> '0=#070736364242'
  sed -r 's/(#[^ ]+)[ ]+([0-9]{1,2})/\2=\1/' | convert_hex
}

fn gen_footer {
# Default colors specified by roxterm.
cat <<END
16=#4c4c4c4c4c4c
17=#a8a830303030
18=#202088882020
19=#a8a888880000
20=#555555559898
21=#888830308888
22=#303088888888
23=#d8d8d8d8d8d8
END
  echo 'cursor='^`{extract_color_value base1}
  echo 'palette_size=16'
}

# main
gen_header && gen_colormap && gen_footer