iankelling.org Git - distro-functions/blob - src/identify-distros

   1 #!/bin/bash
   2 # Copyright (C) 2014 Ian Kelling
   3
   4 # Licensed under the Apache License, Version 2.0 (the "License");
   5 # you may not use this file except in compliance with the License.
   6 # You may obtain a copy of the License at
   7
   8 #     http://www.apache.org/licenses/LICENSE-2.0
   9
  10 # Unless required by applicable law or agreed to in writing, software
  11 # distributed under the License is distributed on an "AS IS" BASIS,
  12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13 # See the License for the specific language governing permissions and
  14 # limitations under the License.
  15
  16 distro-name() {
  17   local x
  18   if [[ -f /etc/fedora-release ]]; then
  19     echo fedora
  20   elif [[ -e /etc/os-release ]]; then
  21     sed -rn 's/^ID=(.*)/\1/p' /etc/os-release
  22   elif type -p lsb_release &>/dev/null; then
  23     # well, this is more standard, but it's 2 ms vs 200 ms
  24     x=$(lsb_release -si); echo ${x,,}
  25   else
  26     echo "unknown distro"
  27     return 1
  28   fi
  29 }
  30
  31 distro-name-compat() {
  32   local x=$(distro-name)
  33   case $x in
  34     trisquel)
  35       echo ubuntu
  36       ;;
  37     *)
  38       echo $x
  39       ;;
  40   esac
  41 }
  42
  43 distro-name-ver() {
  44   echo $(distro-name)$(debian-archive)
  45 }
  46
  47 distro-num() {
  48   # Subshell keeps environment clean.
  49   ( . /etc/os-release
  50     # in ubuntu the .x matters, trisquel it doesnt
  51     if [[ $ID == ubuntu ]]; then
  52       echo $VERSION_ID
  53     else
  54       echo ${VERSION_ID%%.*}
  55     fi
  56   )
  57 }
  58
  59 debian-archive() {
  60   isdeb || return 0
  61   local archive expression pri name highpri shortest
  62   local policy="${1:-$(apt-cache policy)}" || return $?
  63   # a = archive
  64   # n = codename
  65   # o = origin
  66   # c = component (licensing component)
  67   # l = label (Debian{,-Security,-Updates})
  68   local d=$(distro-name)
  69   # goto b for archive lines we are interested in, a for lines we arent
  70   # print priority + archive name. priority is in
  71   # the previous line from the archive line.
  72   # case insensitive, because $d is lower and we are matching with first char upper
  73   read -rd '' expression <<EOF ||:
  74 /o=$d/I!b a;/l=$d/I!b a;/c=main/!b a b b;
  75 : a;s/^ *([-0-9]+).*/\1/;h;b;
  76 : b;s/^.*a=([^,]+).*/ \1/;H;x;s/\n//;p
  77 EOF
  78   while read -r pri name; do
  79     # in ubuntu, we get archives like flidas, flidas-updates, all the same pri,
  80     # so just pick the shortest one.
  81     if [[ ! $highpri ]]; then
  82       highpri=$pri;
  83       shortest=$name
  84       continue
  85     fi
  86     if [[ $pri != $highpri ]]; then
  87       break
  88     fi
  89     if (( ${#shortest} > ${#name} )); then
  90       shortest=$name
  91     fi
  92   done < <(echo "$policy" | sed -rn "$expression" | sort -rn || [[ $? == 141 ]])
  93   echo "$shortest"
  94 }
  95
  96 # formatted for use in pfile() in package-manager-abstractions
  97 positive-origins() {
  98   isdeb || return 0
  99   local archive expression pri name highpri shortest
 100   local policy="${1:-$(apt-cache policy)}" || return $?
 101   # a = archive
 102   # n = codename
 103   # o = origin
 104   # c = component (licensing component)
 105   # l = label (Debian{,-Security,-Updates})
 106   read -rd '' expression <<EOF ||:
 107 /^ *([-0-9]+).*/{s/^ *([-0-9]+).*/\1/;h}
 108 /^.*o=([^,]+).*/{s/^.*o=([^,]+).*/ \1/;H;x;s/\n//;p}
 109 EOF
 110   origins=
 111   while read -r pri name; do
 112     if (( pri > 0 )); then
 113       if [[ ! $origins ]]; then
 114         origins=$name
 115       else
 116         origins+=,$name
 117       fi
 118     fi
 119   done < <(echo "$policy" | sed -rn "$expression" | sort -rn || [[ $? == 141 ]])
 120   echo $origins
 121 }
 122
 123 isdebian-testing() {
 124   [[ $(debian-archive) == testing ]]
 125 }
 126 # I only do testing or stable.
 127 isdebian-stable() {
 128   [[ $(debian-archive) == stable ]]
 129 }
 130
 131 debian-codename() {
 132   isdeb || return 0
 133   local policy="$(apt-cache policy)" || return $?
 134   archive=$(debian-archive "$policy")
 135   echo "$policy" | sed -rn "s/^.*a=$archive,n=([a-z]+).*/\1/p;T;q" || [[ $? == 141 ]]
 136 }
 137 debian-codename-compat() {
 138   local n=$(debian-codename)
 139   case $n in
 140     flidas)
 141       echo xenial
 142       ;;
 143     etiona)
 144       echo bionic
 145       ;;
 146     nabia)
 147       echo focal
 148       ;;
 149     aramo)
 150       echo jammy
 151       ;;
 152     *)
 153       echo $n
 154       ;;
 155   esac
 156 }
 157
 158 isfedora() {
 159   [[ $(distro-name) == fedora ]]
 160 }
 161 isdebian() {
 162   [[ $(distro-name) == debian ]]
 163 }
 164 isarch() {
 165   [[ $(distro-name) == arch ]]
 166 }
 167 isubuntu() {
 168   [[ $(distro-name) == ubuntu ]]
 169 }
 170 istrisquel() {
 171   [[ $(distro-name) == trisquel ]]
 172 }
 173 # is debian/apt based
 174 isdeb() { command -v apt-get &>/dev/null; }