File: v.sh
   1 #!/bin/sh
   2 
   3 # The MIT License (MIT)
   4 #
   5 # Copyright (c) 2026 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 # v [option...] [files...]
  27 #
  28 # View is a simple non-interactive file viewer, which handles plain-text files
  29 # and pictures of all commonly-used formats.
  30 #
  31 # The options are, available in single and double-dashed versions
  32 #
  33 #   -h, -help     show this help message
  34 #   -header=n     always show first `n` lines at the top
  35 #   -n, -N        show line numbers for overall results
  36 #   -s, -sixel    show pictures using the sixel format (experimental)
  37 #   -t, -top      always show first line at the top
  38 
  39 
  40 case "$1" in
  41     -h|--h|-help|--help)
  42         awk '/^# +v /, /^$/ { gsub(/^# ?/, ""); print }' "$0"
  43         exit 0
  44     ;;
  45 esac
  46 
  47 sixels=0
  48 # less_options='-MKiCRS'
  49 less_options='-MKiCS'
  50 
  51 for arg in "$@"; do
  52     if [ "${arg}" = '--' ]; then
  53         shift
  54         break
  55     fi
  56 
  57     case "${arg}" in
  58         -n|--n|-N|--N)
  59             less_options="${less_options} -N"
  60             shift
  61             continue
  62         ;;
  63 
  64         --header=*)
  65             less_options="${less_options} ${arg}"
  66             shift
  67             continue
  68         ;;
  69 
  70         -s|--s|-sixel|--sixel|-sixels|--sixels)
  71             sixels=1
  72             # less_options="${less_options} -r"
  73             shift
  74             continue
  75         ;;
  76 
  77         -t|--t|-top|--top)
  78             less_options="${less_options} --header=1"
  79             shift
  80             continue
  81         ;;
  82     esac
  83 
  84     break
  85 done
  86 
  87 if [ "${sixels}" -eq 0 ]; then
  88     less_options="${less_options} -R"
  89 fi
  90 
  91 if [ $# -eq 0 ]; then
  92     less ${less_options} -f -
  93     exit $?
  94 fi
  95 
  96 bat_style='plain,header,numbers'
  97 if [ $# -lt 2 ]; then
  98     bat_style='plain,numbers'
  99     less_options="${less_options} --header=1"
 100 fi
 101 
 102 # show all non-existing files given
 103 failed=0
 104 for arg in "$@"; do
 105     if [ "${arg}" = "-" ]; then
 106         continue
 107     fi
 108     if [ ! -e "${arg}" ]; then
 109         printf "no file named \"%s\"\n" "${arg}" > /dev/stderr
 110         failed=1
 111     fi
 112 done
 113 
 114 if [ "${failed}" -gt 0 ]; then
 115     exit 2
 116 fi
 117 
 118 bat=''
 119 if [ -e /usr/bin/batcat ]; then
 120     bat='/usr/bin/batcat'
 121 elif [ -e /usr/bin/bat ]; then
 122     bat='/usr/bin/bat'
 123 else
 124     printf "file viewer 'bat'/'batcat' not found" > /dev/stderr
 125     exit 1
 126 fi
 127 
 128 view_pic=''
 129 if [ -e /usr/bin/chafa ]; then
 130     view_pic='chafa'
 131     if [ "${sixels}" -eq 1 ]; then
 132         view_pic='chafa --format sixels'
 133     fi
 134 fi
 135 
 136 gap=0
 137 
 138 for arg in "$@"; do
 139     [ "${gap}" -gt 0 ] && printf "\n"
 140     gap=1
 141 
 142     printf "\e[7m%-80s\e[0m\n" "${arg}"
 143 
 144     if [ "${arg}" = '-' ]; then
 145         kind='-: text/plain'
 146     else
 147         kind="$(file --mime-type "${arg}")"
 148     fi
 149 
 150     if echo "${kind}" | grep -E -q ' image/[a-z0-9\.-]+$'; then
 151         if [ -z "${view_pic}" ]; then
 152             printf "%s\n" "${kind}"
 153         else
 154             ${view_pic} "${arg}"
 155         fi
 156         continue
 157     fi
 158 
 159     if echo "${kind}" | grep -q ' inode/directory$'; then
 160         printf "%s is a folder\n" "${arg}"
 161         continue
 162     fi
 163 
 164     if echo "${kind}" | grep -E -q -v ' text/[a-z0-9\.\+-]+$'; then
 165         if echo "${kind}" | grep -E -q -v ' application/j(avascript|son)$'; then
 166             printf "%s\n" "${kind}"
 167             continue
 168         fi
 169     fi
 170 
 171     if [ -z "${bat}" ]; then
 172         awk '{ printf "%6d  %s\n", NR, $0 }' "${arg}"
 173         continue
 174     fi
 175 
 176     "${bat}" \
 177         --style="${bat_style}" \
 178         --theme='Monokai Extended Light' \
 179         --wrap=never --color=always --paging=never "${arg}" |
 180     # make colors readable even on light backgrounds
 181     sed -e 's-\x1b\[38;5;70m-\x1b[38;5;28m-g' \
 182         -e 's-\x1b\[38;5;214m-\x1b[38;5;208m-g' \
 183         -e 's-\x1b\[38;5;243m-\x1b[38;5;103m-g' \
 184         -e 's-\x1b\[38;5;238m-\x1b[38;5;245m-g' \
 185         -e 's-\x1b\[38;5;228m-\x1b[48;5;228m-g'
 186 done 2>&1 | less ${less_options}