File: cio.sh
   1 #!/bin/sh
   2 
   3 # The MIT License (MIT)
   4 #
   5 # Copyright © 2024 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 # cio
  27 #
  28 # Clipboard IO automatically figures out whether to copy/paste the text
  29 # clipboard, depending on the piping of its standard input/output.
  30 #
  31 # When both its standard input/output are piped, it first updates the text
  32 # clipboard, and then emits its new value to stdout.
  33 #
  34 # When run on its own (unpiped), it just emits the current text clipboard
  35 # value to stdout.
  36 
  37 
  38 # handle help option(s)
  39 case "$1" in
  40     -h|--h|-help|--help)
  41         # show help message, extracting the info-comment at the start
  42         # of this file, and quit
  43         awk '/^# +cio/, /^$/ { gsub(/^# ?/, ""); print }' "$0"
  44         exit 0
  45     ;;
  46 esac
  47 
  48 get_clip() {
  49     if [ -e /dev/clipboard ]; then
  50         cat /dev/clipboard
  51         return $?
  52     fi
  53     if [ -e wl-paste ]; then
  54         wl-paste
  55         return $?
  56     fi
  57     if [ -e wclip ]; then
  58         wclip -o
  59         return $?
  60     fi
  61     if [ -e xclip ]; then
  62         xclip -sel clip -o
  63         return $?
  64     fi
  65     if [ -e pbpaste ]; then
  66         pbpaste
  67         return $?
  68     fi
  69     if [ -e powershell.exe ]; then
  70         powershell.exe -c Get-Clipboard
  71         return $?
  72     fi
  73 
  74     # printf "\e[31mcan't use the clipboard\e[0m\n" > /dev/stderr
  75     # exit 1
  76     powershell.exe -c Get-Clipboard
  77     return $?
  78 }
  79 
  80 set_clip() {
  81     if [ -e /dev/clipboard ]; then
  82         cat > /dev/clipboard
  83         return $?
  84     fi
  85     if [ -e wl-copy ]; then
  86         wl-copy
  87         return $?
  88     fi
  89     if [ -e wclip ]; then
  90         wclip
  91         return $?
  92     fi
  93     if [ -e xclip ]; then
  94         xclip -sel clip
  95         return $?
  96     fi
  97     if [ -e pbcopy ]; then
  98         pbcopy
  99         return $?
 100     fi
 101     if [ -e clip.exe ]; then
 102         clip.exe
 103         return $?
 104     fi
 105 
 106     # printf "\e[31mcan't use the clipboard\e[0m\n" > /dev/stderr
 107     # exit 1
 108     clip.exe
 109     return $?
 110 }
 111 
 112 # handle both `... | cio` and `... | cio | ...`
 113 if [ -p /dev/stdin ]; then
 114     cat | set_clip
 115     # ... | cio | ...
 116     if [ -p /dev/stdout ]; then
 117         get_clip
 118     fi
 119     exit $?
 120 fi
 121 
 122 # handle `cio | ...`
 123 if [ -p /dev/stdout ]; then
 124     get_clip
 125     exit $?
 126 fi
 127 
 128 # handle `cio ...`
 129 if [ $# -gt 0 ]; then
 130     cat "$@" | set_clip
 131     exit $?
 132 fi
 133 
 134 # handle `cio`
 135 get_clip
 136 exit $?