Python is not available on all systems. Port the colorize filter to awk
as it is a more widespread POSIX utility.
Users are free to copy the filter into their home dir and tweak the
colors to their needs. The highlighted items are:
=============== ======= ======= ========= =================
Item Red Green Blue Color
=============== ======= ======= ========= =================
quoted text 1 95 175 255 Blue
quoted text 2 255 135 0 Orange
quoted text 3 175 135 255 Purple
quoted text 4 255 95 215 Pink
quoted text * 128 128 128 Grey
diff meta 255 255 255 White bold
diff chunk 205 0 205 Cyan
diff added 0 205 0 Red
diff removed 205 0 0 Green
signature 175 135 255 Purple
header 175 135 255 Purple
url 255 255 175 Yellow
=============== ======= ======= ========= =================
This assumes a terminal emulator with true color support and with
a dark/black background.
Link: https://github.com/termstandard/colors
Signed-off-by: Robin Jarry <robin@jarry.cc>
This filter script is not compatible with the previous one. Rename it to
avoid issues with existing configs.
Fixes: bca93cd915 ("filters: add a more complete plaintext filter")
Signed-off-by: Robin Jarry <robin@jarry.cc>
