File: stawk.sh
   1 #!/bin/sh
   2 
   3 # The MIT License (MIT)
   4 #
   5 # Copyright © 2025 pacman64
   6 #
   7 # Permission is hereby granted, free of charge, to any person obtaining a copy
   8 # of this software and associated documentation files (the “Software”), to deal
   9 # in the Software without restriction, including without limitation the rights
  10 # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11 # copies of the Software, and to permit persons to whom the Software is
  12 # furnished to do so, subject to the following conditions:
  13 #
  14 # The above copyright notice and this permission notice shall be included in
  15 # all copies or substantial portions of the Software.
  16 #
  17 # THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  20 # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23 # SOFTWARE.
  24 
  25 
  26 # stawk [style] [awk condition...] [filenames...]
  27 #
  28 #
  29 # STyle (lines) satisfying an AWK condition/expression, keeping all other
  30 # lines the same. When not given a condition, all lines are styled.
  31 #
  32 # The colors/styles available are:
  33 #     blue
  34 #     bold
  35 #     gray
  36 #     green
  37 #     inverse
  38 #     magenta
  39 #     orange
  40 #     purple
  41 #     red
  42 #     underline
  43 #
  44 # Some style aliases are:
  45 #     b       blue
  46 #     g       green
  47 #     m       magenta
  48 #     o       orange
  49 #     p       purple
  50 #     r       red
  51 #     u       underline
  52 #     hi      inverse (highlight)
  53 
  54 
  55 case "$1" in
  56     -h|--h|-help|--help)
  57         awk '/^# +stawk /, /^$/ { gsub(/^# ?/, ""); print }' "$0"
  58         exit 0
  59     ;;
  60 esac
  61 
  62 # if [ $# -lt 1 ]; then
  63 #     awk '/^# +stawk /, /^$/ { gsub(/^# ?/, ""); print }' "$0"
  64 #     exit 0
  65 # fi
  66 
  67 [ "$1" = "--" ] && shift
  68 
  69 command='awk'
  70 if [ -p /dev/stdout ] || [ -t 1 ]; then
  71     command='stdbuf -oL awk'
  72 fi
  73 
  74 name="${1:-invert}"
  75 [ $# -gt 0 ] && shift
  76 cond="${1:-1}"
  77 [ $# -gt 0 ] && shift
  78 
  79 ${command} -v name="${name}" '
  80     BEGIN {
  81         # alias-lookup table
  82         a["r"] = "red"
  83         a["g"] = "green"
  84         a["b"] = "blue"
  85         a["o"] = "orange"
  86         a["p"] = "purple"
  87         a["m"] = "magenta"
  88         a["h"] = "invert"
  89         a["i"] = "invert"
  90         a["u"] = "underline"
  91         a["or"] = "orange"
  92         a["ma"] = "magenta"
  93         a["hi"] = "invert"
  94         a["in"] = "invert"
  95         a["un"] = "underline"
  96         a["inv"] = "invert"
  97         a["mag"] = "magenta"
  98         a["grey"] = "gray"
  99         a["inverse"] = "invert"
 100         a["inverted"] = "invert"
 101         a["hilite"] = "invert"
 102         a["hilited"] = "invert"
 103         a["highlight"] = "invert"
 104         a["highlighted"] = "invert"
 105         a["underlined"] = "underline"
 106         a["bb"] = "blueback"
 107         a["gb"] = "greenback"
 108         a["mb"] = "magentaback"
 109         a["ob"] = "orangeback"
 110         a["pb"] = "purpleback"
 111         a["rb"] = "redback"
 112         a["bg"] = "greenback"
 113         a["bm"] = "magentaback"
 114         a["bo"] = "orangeback"
 115         a["bp"] = "purpleback"
 116         a["br"] = "redback"
 117         a["bluebg"] = "blueback"
 118         a["graybg"] = "grayback"
 119         a["greenbg"] = "greenback"
 120         a["greyback"] = "grayback"
 121         a["greybg"] = "grayback"
 122         a["magentabg"] = "magentaback"
 123         a["orangebg"] = "orangeback"
 124         a["purplebg"] = "purpleback"
 125         a["redbg"] = "redback"
 126         a["magback"] = "magentaback"
 127         a["magbg"] = "magentaback"
 128         a["orback"] = "orangeback"
 129         a["orbg"] = "orangeback"
 130         a["purback"] = "purpleback"
 131         a["purbg"] = "purpleback"
 132 
 133         # style-lookup table
 134         s["red"] = "\x1b[38;2;204;0;0m"
 135         s["green"] = "\x1b[38;2;0;135;95m"
 136         s["blue"] = "\x1b[38;2;0;95;215m"
 137         s["orange"] = "\x1b[38;2;215;95;0m"
 138         s["purple"] = "\x1b[38;2;135;95;255m"
 139         s["magenta"] = "\x1b[38;2;215;0;255m"
 140         s["gray"] = "\x1b[38;2;168;168;168m"
 141         s["bold"] = "\x1b[1m"
 142         s["invert"] = "\x1b[7m"
 143         s["italic"] = "\x1b[3m"
 144         s["strike"] = "\x1b[9m"
 145         s["underline"] = "\x1b[4m"
 146         s["blueback"] = "\x1b[48;2;0;95;215m\x1b[38;2;238;238;238m"
 147         s["grayback"] = "\x1b[48;2;168;168;168m\x1b[38;2;238;238;238m"
 148         s["greenback"] = "\x1b[48;2;0;135;95m\x1b[38;2;238;238;238m"
 149         s["magentaback"] = "\x1b[48;2;215;0;255m\x1b[38;2;238;238;238m"
 150         s["orangeback"] = "\x1b[48;2;215;95;0m\x1b[38;2;238;238;238m"
 151         s["purpleback"] = "\x1b[48;2;135;95;255m\x1b[38;2;238;238;238m"
 152         s["redback"] = "\x1b[48;2;204;0;0m\x1b[38;2;238;238;238m"
 153 
 154         # resolve aliases
 155         if (a[name] != "") {
 156             name = a[name]
 157         }
 158 
 159         if (s[name] == "") {
 160             fmt = "\x1b[31mstyle/color %s not supported\x1b[0m\n"
 161             printf(fmt, name) > "/dev/stderr"
 162             exit 1
 163         }
 164 
 165         style = s[name]
 166         resetstyle = "\x1b[0m" style
 167     }
 168 
 169     { low = lower = tolower($0) }
 170 
 171     '"${cond}"' {
 172         gsub(/\x1b\[0m/, resetstyle)
 173         printf "%s%s\x1b[0m\n", style, $0
 174         next
 175     }
 176 
 177     1
 178 ' "$@"