filters: port colorize to awk
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>
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Robin Jarry
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1 changed files with 137 additions and 166 deletions
297
filters/colorize
297
filters/colorize
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@ -1,171 +1,142 @@
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#!/usr/bin/env python3
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#!/bin/awk -f
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# Copyright (c) 2022 Robin Jarry
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# Copyright (c) 2022 Robin Jarry
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"""
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BEGIN {
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Colorize plaintext email. Write to stdout.
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# R;G;B colors
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"""
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url = "\x1b[38;2;255;255;175m" # yellow
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header = "\x1b[38;2;175;135;255m" # purple
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import re
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signature = "\x1b[38;2;175;135;255m" # purple
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import sys
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diff_meta = "\x1b[1;38;2;255;255;255m" # bold white
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diff_chunk = "\x1b[38;205;0;205m" # cyan
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diff_add = "\x1b[38;2;0;205;0m" # green
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TERM_RESET = "\x1b[0m"
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diff_del = "\x1b[38;2;205;0;0m" # red
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TERM_BOLD = "\x1b[1m"
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quote_1 = "\x1b[38;2;95;175;255m" # blue
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TERM_BG_GRAY = "\x1b[48;5;244m"
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quote_2 = "\x1b[38;2;255;135;0m" # orange
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TERM_FG_GRAY = "\x1b[38;5;244m"
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quote_3 = "\x1b[38;2;175;135;255m" # purple
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TERM_FG_RED = "\x1b[38;5;1m"
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quote_4 = "\x1b[38;2;255;95;215m" # pink
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TERM_FG_GREEN = "\x1b[38;5;2m"
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quote_x = "\x1b[38;2;128;128;128m" # gray
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TERM_FG_CYAN = "\x1b[38;5;6m"
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reset = "\x1b[0m"
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TERM_FG_YELLOW = "\x1b[38;5;229m"
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# state
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TERM_FG_WHITE = "\x1b[38;5;15m"
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in_diff = 0
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TERM_FG_BLUE = "\x1b[38;5;75m"
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in_signature = 0
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TERM_FG_PURPLE = "\x1b[38;5;141m"
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in_headers = 0
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TERM_FG_ORANGE = "\x1b[38;5;208m"
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in_body = 0
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TERM_FG_PINK = "\x1b[38;5;171m"
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# patterns
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QUOTE_COLORS = {
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header_pattern = @/^[A-Z][[:alnum:]-]+:/
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1: TERM_FG_BLUE,
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url_pattern = @/[a-z]{2,6}:\/\/[[:graph:]]+|[[:alnum:]_\+\.~\/-]*[[:alnum:]_]@[[:lower:]][[:alnum:]\.-]*[[:lower:]]/
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2: TERM_FG_ORANGE,
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3: TERM_FG_PURPLE,
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4: TERM_FG_PINK,
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}
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}
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URL_RE = re.compile(
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function color_quote(line) {
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r"""
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(
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https?://[\w,;:!/#%^=@~\&\*\+\?\.\-]+
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[\w\-\+\.~/]*\w@\w[\w\-\.]+\w
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)
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""",
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re.VERBOSE,
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)
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HEADER_RE = re.compile(r"^[A-Z][\w-]+:")
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DIFF_META = ("diff --git ", "index ", "--- ", "+++ ")
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def replace_match(color, context_color):
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def replace_func(match):
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return color + match.group(0) + context_color
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return replace_func
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def main():
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in_patch = in_signature = in_headers = in_body = False
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for line in sys.stdin.buffer:
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line = line.decode("utf-8", errors="replace").rstrip("\r\n")
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if in_patch:
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if line in ("--", "-- "):
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in_signature = True
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in_body = in_patch = in_headers = False
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line = TERM_FG_PURPLE + line + TERM_RESET
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elif line.startswith("@@ "):
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line = TERM_FG_CYAN + line + TERM_RESET
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elif any(line.startswith(m) for m in DIFF_META):
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line = TERM_BOLD + TERM_FG_WHITE + line + TERM_RESET
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elif line.startswith("+"):
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line = TERM_FG_GREEN + line + TERM_RESET
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elif line.startswith("-"):
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line = TERM_FG_RED + line + TERM_RESET
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elif in_signature:
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line = (
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TERM_FG_PURPLE
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+ URL_RE.sub(replace_match(TERM_FG_YELLOW, TERM_FG_PURPLE), line)
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+ TERM_RESET
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)
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elif in_headers:
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if line == "":
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in_body = True
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in_headers = False
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else:
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line = HEADER_RE.sub(replace_match(TERM_FG_PURPLE, TERM_RESET), line)
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line = URL_RE.sub(replace_match(TERM_FG_YELLOW, TERM_RESET), line)
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elif in_body:
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if line.startswith(">"):
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level = 0
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level = 0
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quotes = ""
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quotes = ""
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while line.startswith(">"):
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while (line ~ /^>/) {
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quotes += ">"
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line = line[1:]
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level += 1
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level += 1
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while line.startswith(" "):
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quotes = quotes ">"
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quotes += " "
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line = substr(line, 2)
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line = line[1:]
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while (line ~ /^ /) {
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quote_color = QUOTE_COLORS.get(quotes.count(">"), TERM_FG_GRAY)
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quotes = quotes " "
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line = substr(line, 2)
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}
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}
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if (level == 1) {
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color = quote_1
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} else if (level == 2) {
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color = quote_2
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} else if (level == 3) {
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color = quote_3
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} else if (level == 4) {
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color = quote_4
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} else {
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color = quote_x
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}
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if (line ~ /^\+/) {
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return color quotes diff_add line reset
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} else if (line ~ /^-/) {
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return color quotes diff_del line reset
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}
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gsub(url_pattern, url "&" color, line)
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return color quotes line reset
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}
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{
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# Strip carriage returns from line
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sub(/\r$/, "")
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if line.startswith("+"):
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if (in_diff) {
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line = quote_color + quotes + TERM_FG_GREEN + line + TERM_RESET
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if ($0 ~ /^-- ?$/) {
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elif line.startswith("-"):
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in_signature = 1
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line = quote_color + quotes + TERM_FG_RED + line + TERM_RESET
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in_diff = 0
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else:
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in_headers = 0
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line = (
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in_body = 0
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quote_color
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$0 = signature $0 reset
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+ quotes
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} else if ($0 ~ /^@@ /) {
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+ URL_RE.sub(
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$0 = diff_chunk $0 reset
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replace_match(TERM_FG_YELLOW, quote_color), line
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} else if ($0 ~ /^(diff --git|index|---|\+\+\+) /) {
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)
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$0 = diff_meta $0 reset
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+ TERM_RESET
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} else if ($0 ~ /^\+/) {
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)
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$0 = diff_add $0 reset
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elif line.startswith("diff --git "):
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} else if ($0 ~ /^-/) {
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in_patch = True
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$0 = diff_del $0 reset
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in_body = in_headers = False
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}
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line = TERM_BOLD + TERM_FG_WHITE + line + TERM_RESET
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} else if (in_signature) {
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elif line in ("--", "-- "):
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$0 = signature $0 reset
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in_signature = True
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gsub(url_pattern, url "&" signature)
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in_body = in_patch = in_headers = False
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} else if (in_headers) {
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line = TERM_FG_PURPLE + line + TERM_RESET
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if ($0 ~ /^$/) {
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else:
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in_signature = 0
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line = URL_RE.sub(replace_match(TERM_FG_YELLOW, TERM_RESET), line)
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in_diff = 0
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in_headers = 0
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in_body = 1
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} else {
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sub(header_pattern, header "&" reset)
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gsub(url_pattern, url "&" reset)
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}
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} else if (in_body) {
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if ($0 ~ /^>/) {
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$0 = color_quote($0)
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} else if ($0 ~ /^diff --git /) {
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in_signature = 0
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in_diff = 1
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in_headers = 0
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in_body = 0
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$0 = diff_meta $0 reset
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} else if ($0 ~ /^-- ?$/) {
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in_signature = 1
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in_diff = 0
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in_headers = 0
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in_body = 0
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$0 = signature $0 reset
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} else {
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gsub(url_pattern, url "&" reset)
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}
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} else if ($0 ~ /^diff --git /) {
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in_signature = 0
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in_diff = 1
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in_headers = 0
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in_body = 0
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$0 = diff_meta $0 reset
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} else if ($0 ~ /^-- ?$/) {
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in_signature = 1
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in_diff = 0
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in_headers = 0
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in_body = 0
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$0 = signature $0 reset
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} else if ($0 ~ header_pattern) {
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in_signature = 0
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in_diff = 0
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in_headers = 1
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in_body = 0
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sub(header_pattern, header "&" reset)
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gsub(url_pattern, url "&" reset)
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} else {
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in_signature = 0
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in_diff = 0
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in_headers = 0
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in_body = 1
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if ($0 ~ /^>/) {
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$0 = color_quote($0)
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} else {
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gsub(url_pattern, url "&" reset)
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}
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}
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elif line.startswith("diff --git "):
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print
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in_patch = True
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}
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in_body = in_headers = False
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line = TERM_BOLD + TERM_FG_WHITE + line + TERM_RESET
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elif line in ("--", "-- "):
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in_signature = True
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in_body = in_patch = in_headers = False
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line = TERM_FG_PURPLE + line + TERM_RESET
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elif HEADER_RE.search(line):
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in_headers = True
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line = HEADER_RE.sub(replace_match(TERM_FG_PURPLE, TERM_RESET), line)
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line = URL_RE.sub(replace_match(TERM_FG_YELLOW, TERM_RESET), line)
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else:
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in_body = True
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if line.startswith(">"):
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level = 0
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quotes = ""
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while line.startswith(">"):
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quotes += ">"
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line = line[1:]
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level += 1
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while line.startswith(" "):
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quotes += " "
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line = line[1:]
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quote_color = QUOTE_COLORS.get(quotes.count(">"), TERM_FG_GRAY)
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if line.startswith("+"):
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line = quote_color + quotes + TERM_FG_GREEN + line + TERM_RESET
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elif line.startswith("-"):
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line = quote_color + quotes + TERM_FG_RED + line + TERM_RESET
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else:
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line = (
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quote_color
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+ quotes
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+ URL_RE.sub(
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replace_match(TERM_FG_YELLOW, quote_color), line
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)
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+ TERM_RESET
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)
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sys.stdout.write(line + "\r\n")
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sys.stdout.flush()
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if __name__ == "__main__":
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sys.exit(main())
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