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 $x
  39             ;;
  40     esac
  41 }
  42
  43 distro-name-ver() {
  44     echo `distro-name``debian-archive`
  45 }
  46
  47 debian-archive() {
  48     isdeb || return 0
  49     local archive expression pri name highpri shortest
  50     local policy="${1:-$(apt-cache policy)}" || return $?
  51     # a = archive
  52     # n = codename
  53     # o = origin
  54     # c = component (licensing component)
  55     # l = label (Debian{,-Security,-Updates})
  56     local d=$(distro-name)
  57     # goto b for archive lines we are interested in, a for lines we arent
  58     # print priority + archive name. priority is in
  59     # the previous line from the archive line.
  60     # case insensitive, because $d is lower and we are matching with first char upper
  61     read -rd '' expression <<EOF ||:
  62 /o=$d/I!b a;/l=$d/I!b a;/c=main/!b a b b;
  63 : a;s/^ *([-0-9]+).*/\1/;h;b;
  64 : b;s/^.*a=([^,]+).*/ \1/;H;x;s/\n//;p
  65 EOF
  66     while read -r pri name; do
  67 # in ubuntu, we get archives like flidas, flidas-updates, all the same pri,
  68 # so just pick the shortest one.
  69         if [[ ! $highpri ]]; then
  70             highpri=$pri;
  71             shortest=$name
  72             continue
  73         fi
  74         if [[ $pri != $highpri ]]; then
  75             break
  76         fi
  77         if (( ${#shortest} > ${#name} )); then
  78             shortest=$name
  79         fi
  80     done < <(echo "$policy" | sed -rn "$expression" | sort -rn)
  81     echo "$shortest"
  82
  83 }
  84
  85
  86 isdebian-testing() {
  87     [[ $(debian-archive) == testing ]]
  88 }
  89 # I only do testing or stable.
  90 isdebian-stable() {
  91     [[ $(debian-archive) == stable ]]
  92 }
  93
  94 debian-codename() {
  95     isdeb || return 0
  96     local policy="$(apt-cache policy)" || return $?
  97     archive=$(debian-archive "$policy")
  98     echo "$policy" | sed -rn "s/^.*a=$archive,n=([a-z]+).*/\1/p;T;q"
  99 }
 100 debian-codename-compat() {
 101     local n=$(debian-codename)
 102     case $n in
 103         flidas)
 104             echo xenial
 105             ;;
 106         *)
 107             echo $n
 108             ;;
 109     esac
 110 }
 111
 112 isfedora() {
 113     [[ $(distro-name) == fedora ]]
 114 }
 115 isdebian() {
 116     [[ $(distro-name) == debian ]]
 117 }
 118 isarch() {
 119     [[ $(distro-name) == arch ]]
 120 }
 121 isubuntu() {
 122     [[ $(distro-name) == ubuntu ]]
 123 }
 124 istrisquel() {
 125     [[ $(distro-name) == trisquel ]]
 126 }
 127 # is debian/apt based
 128 isdeb() { command -v apt-get &>/dev/null; }