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     if [[ -f /etc/fedora-release ]]; then
  18         echo fedora
  19     elif [[ -e /etc/os-release ]]; then
  20         sed -rn 's/^ID=(.*)/\1/p' /etc/os-release
  21     else
  22         echo "unknown distro"
  23         return 1
  24     fi
  25 }
  26
  27 distro-name-ver() {
  28     echo `distro-name``debian-archive`
  29 }
  30
  31 debian-archive() {
  32     isdeb || return 0
  33     local archive
  34     local policy="${1:-$(apt-cache policy)}"
  35     # a = archive
  36     # n = codename
  37     # o = origin
  38     # c = component (licensing component)
  39     # l = label (Debian{,-Security,-Updates})
  40     { for archive in stable testing unstable; do
  41           # print priority + archive name. priority is in
  42           # the previous line after finding the archive.
  43           read -rd '' expression <<EOF ||:
  44 /o=Debian,a=$archive,.*l=Debian,c=main/{x;s/^ *([-0-9]+).*/\1 $archive/p;q};h
  45 EOF
  46           echo "$policy" | sed -rn "$expression"
  47       done
  48     } | sort -rn | head -n1 | grep -oE "\w+$"
  49 }
  50
  51
  52 isdebian-testing() {
  53     [[ $(debian-archive) == testing ]]
  54 }
  55 # I only do testing or stable.
  56 isdebian-stable() {
  57     [[ $(debian-archive) == stable ]]
  58 }
  59
  60 debian-codename() {
  61     isdeb || return 0
  62     local policy="$(apt-cache policy)"
  63     archive=$(debian-archive "$policy")
  64     echo "$policy" | sed -rn "s/^.*a=$archive,n=([a-z]+).*/\1/p;T;q"
  65 }
  66 isfedora() {
  67     [[ $(distro-name) == fedora ]]
  68 }
  69 isdebian() {
  70     [[ $(distro-name) == debian ]]
  71 }
  72 isarch() {
  73     [[ $(distro-name) == arch ]]
  74 }
  75 # is debian/apt based
  76 isdeb() { command -v apt-get &>/dev/null; }
  77 isubuntu() {
  78     [[ $(distro-name) == ubuntu ]]
  79 }