iankelling.org Git - small-misc-bash/blob - ex

   1 #!/bin/bash
   2 # I, Ian Kelling, follow the GNU license recommendations at
   3 # https://www.gnu.org/licenses/license-recommendations.en.html. They
   4 # recommend that small programs, < 300 lines, be licensed under the
   5 # Apache License 2.0. This file contains or is part of one or more small
   6 # programs. If a small program grows beyond 300 lines, I plan to switch
   7 # its license to GPL.
   8
   9 # Copyright 2024 Ian Kelling
  10
  11 # Licensed under the Apache License, Version 2.0 (the "License");
  12 # you may not use this file except in compliance with the License.
  13 # You may obtain a copy of the License at
  14
  15 #     http://www.apache.org/licenses/LICENSE-2.0
  16
  17 # Unless required by applicable law or agreed to in writing, software
  18 # distributed under the License is distributed on an "AS IS" BASIS,
  19 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  20 # See the License for the specific language governing permissions and
  21 # limitations under the License.
  22
  23
  24 ex() {
  25   local help="Usage: ex [--help|-q] FILE...
  26 Extract many types of files
  27
  28 Based on their extensions,
  29 7z [tar.]bz2 deb [tar.]gz iso dsc rar rpm sfs tar xpi [tar.]xz zip Z.
  30 See source for exact file extensions.
  31 Note: dtrx (package & command) extracts most of these plus some others."
  32
  33   local quiet=false
  34   case $1 in
  35     --help)
  36       echo "$help"
  37       return 0
  38       ;;
  39     -q)
  40       quiet=true
  41       shift
  42       ;;
  43   esac
  44   local x super restore_nullglob f cmd
  45   for x in "$@"; do
  46     case "$x" in
  47       # tars first, so they are higher pri than non-tar extensions
  48       *.tar )
  49         $quiet || echo tar xf "$x"
  50         tar xf "$x"
  51         ;;
  52       *.tar.bz2 | *.tbz2 )
  53         $quiet || echo tar xjf "$x"
  54         tar xjf "$x"
  55         ;;
  56       *.tar.gz | *.tgz )
  57         $quiet || echo tar xzf "$x"
  58         tar xzf "$x"
  59         ;;
  60       *.tar.xz )
  61         $quiet || echo tar Jxf "$x"
  62         tar Jxf "$x"
  63         ;;
  64       *.tar.zst )
  65         $quiet || echo tar -I unzstd -xf "$x"
  66         tar -I unzstd -xf "$x"
  67         ;;
  68       *.zst )
  69         $quiet || echo unzstd "$x"
  70         unzstd "$x"
  71         ;;
  72       *.xz)
  73         $quiet || echo pixz -d "$x"
  74         pixz -d "$x"
  75         ;;
  76       *.7z )
  77         if type -p 7za &>/dev/null; then
  78           cmd=7za
  79         else
  80           cmd=7zr
  81         fi
  82         $quiet || echo 7zr x "$x"
  83         $cmd x "$x"
  84         ;;
  85       *.bz2 )
  86         $quiet || echo bunzip2 "$x"
  87         bunzip2 "$x"
  88         ;;
  89       *.deb )
  90         $quiet || echo ar x "$x"
  91         ar x "$x"
  92         restore_nullglob=false
  93         if ! shopt -q nullglob; then
  94           restore_nullglob=true
  95         fi
  96         tmp=(data.tar.* control.tar.*)
  97         if $restore_nullglob; then
  98           shopt -u nullglob
  99         fi
 100         if (( ${#tmp[@]} != 2 )); then
 101           echo "error: could not find data.tar.* or control.tar.*" >&2
 102           return 1
 103         fi
 104         for f in ${tmp[@]}; do
 105           case $f in
 106             *.xz)
 107               $quiet || echo tar xJf $f
 108               tar xJf $f
 109               rm -f $f
 110               ;;
 111             *.zst)
 112               $quiet || echo tar -I unzstd -xf $f
 113               tar -I unzstd -xf $f
 114               rm -f $f
 115               ;;
 116             *.gz)
 117               $quiet || echo tar xzf $f
 118               tar xzf $f
 119               rm -f $f
 120               ;;
 121             *)
 122               echo "ex: ERROR: file i didnt expect: $f"
 123               ;;
 124           esac
 125         done
 126         ;;
 127       *.dsc)
 128         $quiet || echo dpkg-source -x "$x"
 129         dpkg-source -x "$x"
 130         ;;
 131       *.gz )
 132         $quiet || echo gunzip "$x"
 133         gunzip "$x"
 134         ;;
 135       *.iso )
 136         local super
 137         if [[ $EUID != 0 ]]; then
 138           super=sudo
 139         fi
 140         local temp_dir
 141         temp_dir=$(mktemp -d)
 142         $super losetup -f
 143         $quiet || echo $super mount -o loop "$x" "$temp_dir"
 144         $super mount -o loop "$x" "$temp_dir"
 145         local dir="${x%%.iso}"
 146         mkdir "$dir"
 147         $quiet || cp -a "$temp_dir"/* "$dir"
 148         cp -a "$temp_dir"/* "$dir"
 149         $quiet || $super umount "$temp_dir"
 150         $super umount "$temp_dir"
 151         ;;
 152       *.jar)
 153         $quiet || echo jar xf "$x"
 154         jar xf "$x"
 155         ;;
 156       *.r[0-9][0-9]|*.rar )
 157         $quiet || echo unrar x "$x"
 158         unrar x "$x"
 159         ;;
 160       *.rpm )
 161         $quiet || echo "rpm2cpio $x | cpio --extract --make-directories"
 162         rpm2cpio "$x" | cpio --extract --make-directories
 163         ;;
 164       *.sfs)
 165         $quiet || echo $super unsquashfs "$x"
 166         $super unsquashfs "$x"
 167         ;;
 168       *.Z )
 169         $quiet || echo uncompress "$x"
 170         uncompress "$x"
 171         ;;
 172       *.zip|*.xpi )
 173         $quiet || echo unzip "$x"
 174         unzip "$x"
 175         ;;
 176
 177       *)  echo "I don't know how to extract $x";;
 178     esac
 179   done
 180 }
 181 ex "$@"