642d68c482
Merge in DNS/adguard-home from fix-install to master
Squashed commit of the following:
commit 54c3b18c946c88def396f82a941b0b35eb6ef60d
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date: Wed Jan 26 19:08:48 2022 +0300
scripts: do not require sudo where not needed
552 lines
10 KiB
Bash
552 lines
10 KiB
Bash
#!/bin/sh
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# AdGuard Home Installation Script
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# Exit the script if a pipeline fails (-e), prevent accidental filename
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# expansion (-f), and consider undefined variables as errors (-u).
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set -e -f -u
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# Function log is an echo wrapper that writes to stderr if the caller
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# requested verbosity level greater than 0. Otherwise, it does nothing.
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log() {
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if [ "$verbose" -gt '0' ]
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then
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echo "$1" 1>&2
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fi
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}
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# Function error_exit is an echo wrapper that writes to stderr and stops the
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# script execution with code 1.
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error_exit() {
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echo "$1" 1>&2
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exit 1
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}
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# Function usage prints the note about how to use the script.
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#
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# TODO(e.burkov): Document each option.
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usage() {
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echo 'install.sh: usage: [-c channel] [-C cpu_type] [-h] [-O os] [-o output_dir]'\
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'[-r|-R] [-u|-U] [-v|-V]' 1>&2
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exit 2
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}
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# Function is_command checks if the command exists on the machine.
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is_command() {
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command -v "$1" >/dev/null 2>&1
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}
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# Function is_little_endian checks if the CPU is little-endian.
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is_little_endian() {
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[ "$( head -c 6 /bin/sh | tail -c 1 )" = "$( printf '\001' )" ]
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}
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# Function check_required checks if the required software is available on the
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# machine. The required software:
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#
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# curl
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# unzip (macOS) / tar (other unixes)
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#
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check_required() {
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required_darwin="unzip"
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required_unix="tar"
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readonly required_darwin required_unix
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# Split with space.
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required="curl"
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case "$os"
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in
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('freebsd'|'linux'|'openbsd')
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required="$required $required_unix"
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;;
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('darwin')
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required="$required $required_darwin"
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;;
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(*)
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# Generally shouldn't happen, since the OS has already been
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# validated.
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error_exit "unsupported operating system: '$os'"
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;;
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esac
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# Don't use quotes to get word splitting.
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for cmd in ${required}
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do
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log "checking $cmd"
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if ! is_command "$cmd"
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then
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log "the full list of required software: [$required]"
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error_exit "$cmd is required to install AdGuard Home via this script"
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fi
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done
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}
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# Function check_out_dir requires the output directory to be set and exist.
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check_out_dir() {
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if [ "$out_dir" = '' ]
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then
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error_exit 'output directory should be presented'
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fi
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if ! [ -d "$out_dir" ]
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then
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log "$out_dir directory will be created"
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fi
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}
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# Function parse_opts parses the options list and validates it's combinations.
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parse_opts() {
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while getopts "C:c:hO:o:rRuUvV" opt "$@"
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do
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case "$opt"
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in
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(C)
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cpu="$OPTARG"
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;;
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(c)
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channel="$OPTARG"
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;;
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(h)
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usage
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;;
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(O)
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os="$OPTARG"
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;;
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(o)
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out_dir="$OPTARG"
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;;
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(R)
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reinstall='0'
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;;
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(U)
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uninstall='0'
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;;
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(r)
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reinstall='1'
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;;
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(u)
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uninstall='1'
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;;
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(V)
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verbose='0'
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;;
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(v)
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verbose='1'
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;;
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(*)
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log "bad option $OPTARG"
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usage
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;;
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esac
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done
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if [ "$uninstall" -eq '1' ] && [ "$reinstall" -eq '1' ]
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then
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error_exit 'the -r and -u options are mutually exclusive'
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fi
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}
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# Function set_channel sets the channel if needed and validates the value.
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set_channel() {
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# Validate.
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case "$channel"
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in
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('development'|'edge'|'beta'|'release')
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# All is well, go on.
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;;
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(*)
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error_exit \
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"invalid channel '$channel'
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supported values are 'development', 'edge', 'beta', and 'release'"
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;;
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esac
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# Log.
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log "channel: $channel"
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}
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# Function set_os sets the os if needed and validates the value.
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set_os() {
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# Set if needed.
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if [ "$os" = '' ]
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then
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os="$( uname -s )"
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case "$os"
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in
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('Darwin')
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os='darwin'
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;;
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('FreeBSD')
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os='freebsd'
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;;
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('Linux')
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os='linux'
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;;
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('OpenBSD')
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os='openbsd'
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;;
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esac
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fi
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# Validate.
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case "$os"
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in
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('darwin'|'freebsd'|'linux'|'openbsd')
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# All right, go on.
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;;
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(*)
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error_exit "unsupported operating system: '$os'"
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;;
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esac
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# Log.
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log "operating system: $os"
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}
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# Function set_cpu sets the cpu if needed and validates the value.
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set_cpu() {
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# Set if needed.
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if [ "$cpu" = '' ]
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then
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cpu="$( uname -m )"
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case "$cpu"
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in
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('x86_64'|'x86-64'|'x64'|'amd64')
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cpu='amd64'
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;;
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('i386'|'i486'|'i686'|'i786'|'x86')
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cpu='386'
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;;
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('armv5l')
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cpu='armv5'
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;;
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('armv6l')
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cpu='armv6'
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;;
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('armv7l' | 'armv8l')
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cpu='armv7'
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;;
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('aarch64'|'arm64')
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cpu='arm64'
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;;
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('mips'|'mips64')
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if is_little_endian
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then
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cpu="${cpu}le"
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fi
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cpu="${cpu}_softfloat"
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;;
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esac
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fi
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# Validate.
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case "$cpu"
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in
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('amd64'|'386'|'armv5'|'armv6'|'armv7'|'arm64')
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# All right, go on.
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;;
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('mips64le_softfloat'|'mips64_softfloat'|'mipsle_softfloat'|'mips_softfloat')
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# That's right too.
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;;
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(*)
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error_exit "unsupported cpu type: $cpu"
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;;
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esac
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# Log.
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log "cpu type: $cpu"
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}
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# Function fix_darwin performs some configuration changes for macOS if needed.
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#
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# TODO(a.garipov): Remove after the final v0.107.0 release.
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#
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# See https://github.com/AdguardTeam/AdGuardHome/issues/2443.
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fix_darwin() {
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if [ "$os" != 'darwin' ]
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then
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return 0
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fi
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# Set the package extension.
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pkg_ext='zip'
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# It is important to install AdGuard Home into the /Applications directory
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# on macOS. Otherwise, it may grant not enough privileges to the AdGuard
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# Home.
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out_dir='/Applications'
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}
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# Function fix_freebsd performs some fixes to make it work on FreeBSD.
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fix_freebsd() {
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if ! [ "$os" = 'freebsd' ]
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then
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return 0
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fi
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rcd='/usr/local/etc/rc.d'
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readonly rcd
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if ! [ -d "$rcd" ]
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then
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mkdir "$rcd"
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fi
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}
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# Function set_sudo_cmd sets the appropriate command to run a command under
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# superuser privileges.
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set_sudo_cmd() {
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case "$os"
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in
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('openbsd')
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sudo_cmd='doas'
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;;
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('darwin'|'freebsd'|'linux')
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# Go on and use the default, sudo.
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;;
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(*)
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error_exit "unsupported operating system: '$os'"
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;;
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esac
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}
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# Function configure sets the script's configuration.
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configure() {
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set_channel
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set_os
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set_cpu
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fix_darwin
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set_sudo_cmd
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check_out_dir
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pkg_name="AdGuardHome_${os}_${cpu}.${pkg_ext}"
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url="https://static.adguard.com/adguardhome/${channel}/${pkg_name}"
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agh_dir="${out_dir}/AdGuardHome"
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readonly pkg_name url agh_dir
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log "AdGuard Home will be installed into $agh_dir"
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}
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# Function is_root checks for root privileges to be granted.
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is_root() {
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if [ "$( id -u )" -eq '0' ]
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then
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log 'script is executed with root privileges'
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return 0
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fi
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if is_command "$sudo_cmd"
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then
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log 'note that AdGuard Home requires root privileges to install using this script'
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return 1
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fi
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error_exit \
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'root privileges are required to install AdGuard Home using this script
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please, restart it with root privileges'
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}
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# Function rerun_with_root downloads the script, runs it with root privileges,
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# and exits the current script. It passes the necessary configuration of the
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# current script to the child script.
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#
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# TODO(e.burkov): Try to avoid restarting.
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rerun_with_root() {
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script_url=\
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'https://raw.githubusercontent.com/AdguardTeam/AdGuardHome/master/scripts/install.sh'
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readonly script_url
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r='-R'
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if [ "$reinstall" -eq '1' ]
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then
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r='-r'
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fi
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u='-U'
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if [ "$uninstall" -eq '1' ]
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then
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u='-u'
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fi
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v='-V'
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if [ "$verbose" -eq '1' ]
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then
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v='-v'
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fi
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readonly r u v
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log 'restarting with root privileges'
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# Group curl together with an echo, so that if curl fails before producing
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# any output, the echo prints an exit command for the following shell to
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# execute to prevent it from getting an empty input and exiting with a zero
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# code in that case.
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{ curl -L -S -s "$script_url" || echo 'exit 1'; }\
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| $sudo_cmd sh -s -- -c "$channel" -C "$cpu" -O "$os" -o "$out_dir" "$r" "$u" "$v"
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# Exit the script. Since if the code of the previous pipeline is non-zero,
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# the execution won't reach this point thanks to set -e, exit with zero.
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exit 0
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}
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# Function download downloads the file from the URL and saves it to the
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# specified filepath.
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download() {
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log "downloading package from $url -> $pkg_name"
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if ! curl -s "$url" --output "$pkg_name"
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then
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error_exit "cannot download the package from $url into $pkg_name"
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fi
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log "successfully downloaded $pkg_name"
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}
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# Function unpack unpacks the passed archive depending on it's extension.
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unpack() {
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log "unpacking package from $pkg_name into $out_dir"
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if ! mkdir -p "$out_dir"
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then
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error_exit "cannot create directory $out_dir"
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fi
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case "$pkg_ext"
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in
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('zip')
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unzip "$pkg_name" -d "$out_dir"
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;;
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('tar.gz')
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tar -C "$out_dir" -f "$pkg_name" -x -z
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;;
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(*)
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error_exit "unexpected package extension: '$pkg_ext'"
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;;
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esac
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log "successfully unpacked, contents: $( echo; ls -l -A "$agh_dir" )"
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rm "$pkg_name"
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}
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# Function handle_existing detects the existing AGH installation and takes care
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# of removing it if needed.
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handle_existing() {
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if ! [ -d "$agh_dir" ]
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then
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log 'no need to uninstall'
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if [ "$uninstall" -eq '1' ]
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then
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exit 0
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fi
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return 0
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fi
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if [ "$( ls -1 -A $agh_dir )" != '' ]
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then
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log 'the existing AdGuard Home installation is detected'
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if [ "$reinstall" -ne '1' ] && [ "$uninstall" -ne '1' ]
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then
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error_exit \
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"to reinstall/uninstall the AdGuard Home using this script specify one of the '-r' or '-u' flags"
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fi
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# TODO(e.burkov): Remove the stop once v0.107.1 released.
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if ( cd "$agh_dir" && ! ./AdGuardHome -s stop || ! ./AdGuardHome -s uninstall )
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then
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# It doesn't terminate the script since it is possible
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# that AGH just not installed as service but appearing
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# in the directory.
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log "cannot uninstall AdGuard Home from $agh_dir"
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fi
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rm -r "$agh_dir"
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log 'AdGuard Home was successfully uninstalled'
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fi
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if [ "$uninstall" -eq '1' ]
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then
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exit 0
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fi
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}
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# Function install_service tries to install AGH as service.
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install_service() {
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if ( cd "$agh_dir" && ./AdGuardHome -s install )
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then
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return 0
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fi
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log "installation failed, removing $agh_dir"
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rm -r "$agh_dir"
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# Some devices detected to have armv7 CPU face the compatibility
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# issues with actual armv7 builds. We should try to install the
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# armv5 binary instead.
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#
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# See https://github.com/AdguardTeam/AdGuardHome/issues/2542.
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if [ "$cpu" = 'armv7' ]
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then
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cpu='armv5'
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reinstall='1'
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log "trying to use $cpu cpu"
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rerun_with_root
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fi
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error_exit 'cannot install AdGuardHome as a service'
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}
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# Entrypoint
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# Set default values of configuration variables.
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channel='release'
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reinstall='0'
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uninstall='0'
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verbose='0'
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cpu=''
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os=''
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out_dir='/opt'
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pkg_ext='tar.gz'
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sudo_cmd='sudo'
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parse_opts "$@"
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echo 'starting AdGuard Home installation script'
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configure
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check_required
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if ! is_root
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then
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rerun_with_root
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fi
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# Needs rights.
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fix_freebsd
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handle_existing
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download
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unpack
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install_service
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echo "\
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AdGuard Home is now installed and running
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you can control the service status with the following commands:
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$sudo_cmd ${agh_dir}/AdGuardHome -s start|stop|restart|status|install|uninstall"
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