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Add a check at the top of the script to determine if the script is being run on a supported OS

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Signed-off-by: Adam Warner <me@adamwarner.co.uk>
This commit is contained in:
Adam Warner 2020-05-25 17:40:20 +01:00
parent ee172cd6e9
commit af1129fc28
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GPG key ID: 872950F3ECF2B173
1 changed files with 58 additions and 2 deletions
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60
automated install/basic-install.sh
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@ -174,6 +174,61 @@ is_command() {
command -v "${check_command}" >/dev/null 2>&1
}
os_check() {
# This function gets a list of supported OS versions from a TXT record at versions.pi-hole.net
# and determines whether or not the script is running on one of those systems
local remote_os_domain valid_os valid_version detected_os_pretty detected_os detected_version display_warning
remote_os_domain="versions.pi-hole.net"
valid_os=false
valid_version=false
display_warning=true
detected_os_pretty=$(cat /etc/*release | grep PRETTY_NAME | cut -d '=' -f2- | tr -d '"')
detected_os=$(echo "${detected_os_pretty}" | sed 's/ .*//')
detected_version=$(cat /etc/*release | grep VERSION_ID | cut -d '=' -f2- | tr -d '"')
mapfile -t supportedOS < <(dig +short -t txt ${remote_os_domain} | tr -d '"' | tr ' ' '\n')
for i in "${supportedOS[@]}"
do
os_part=$(echo $i | cut -d '=' -f1)
versions_part=$(echo $i | cut -d '=' -f2-)
if [[ "${detected_os}" =~ "${os_part}" ]]; then
valid_os=true
mapfile -t supportedVer < <(echo "${versions_part}" | tr ',' '\n')
for x in "${supportedVer[@]}"
do
if [[ "${detected_version}" =~ $x ]];then
valid_version=true
break
fi
done
break
fi
done
if [ "$valid_os" = true ] && [ "$valid_version" = true ]; then
display_warning=false
fi
if [ "$display_warning" = true ] && [ "$PIHOLE_SKIP_OS_CHECK" != true ]; then
printf " %b %bUnsupported OS detected%b\\n" "${CROSS}" "${COL_LIGHT_RED}" "${COL_NC}"
printf " https://docs.pi-hole.net/main/prerequesites/#supported-operating-systems\\n"
printf "\\n"
printf " This check can be skipped by setting the environment variable %bPIHOLE_SKIP_OS_CHECK%b to %btrue%b\\n" "${COL_LIGHT_RED}" "${COL_NC}" "${COL_LIGHT_RED}" "${COL_NC}"
printf " e.g: export PIHOLE_SKIP_OS_CHECK=true\\n"
printf " By setting this variable to true you acknowledge there may be issues with Pi-hole during or after the install\\n"
printf " If that is the case, you can feel free to ask the community on Discourse with the %bCommunity Help%b category:\\n" "${COL_LIGHT_RED}" "${COL_NC}"
printf " https://discourse.pi-hole.net/c/bugs-problems-issues/community-help/\\n"
exit 1
elif [ "$display_warning" = true ] && [ "$PIHOLE_SKIP_OS_CHECK" = true ]; then
printf " %b %bUnsupported OS detected%b. PIHOLE_SKIP_OS_CHECK env variable set to true - installer will continue\\n" "${INFO}" "${COL_LIGHT_RED}" "${COL_NC}"
else
printf " %b %bSupported OS detected%b\\n" "${TICK}" "${COL_LIGHT_GREEN}" "${COL_NC}"
fi
}
# Compatibility
distro_check() {
# If apt-get is installed, then we know it's part of the Debian family
@ -608,7 +663,7 @@ verifyFreeDiskSpace() {
printf " We were unable to determine available free disk space on this system.\\n"
printf " You may override this check, however, it is not recommended.\\n"
printf " The option '%b--i_do_not_follow_recommendations%b' can override this.\\n" "${COL_LIGHT_RED}" "${COL_NC}"
printf " e.g: curl -L https://install.pi-hole.net | bash /dev/stdin %b<option>%b\\n" "${COL_LIGHT_RED}" "${COL_NC}"
printf " e.g: curl -sSL https://install.pi-hole.net | bash /dev/stdin %b<option>%b\\n" "${COL_LIGHT_RED}" "${COL_NC}"
# exit with an error code
exit 1
# If there is insufficient free disk space,
@ -623,7 +678,7 @@ verifyFreeDiskSpace() {
printf " If this is a new install you may need to expand your disk\\n"
printf " Run 'sudo raspi-config', and choose the 'expand file system' option\\n"
printf " After rebooting, run this installation again\\n"
printf " e.g: curl -L https://install.pi-hole.net | bash\\n"
printf " e.g: curl -sSL https://install.pi-hole.net | bash\\n"
fi
# Show there is not enough free space
printf "\\n %bInsufficient free space, exiting...%b\\n" "${COL_LIGHT_RED}" "${COL_NC}"
@ -2549,6 +2604,7 @@ main() {
fi
# Check for supported distribution
os_check
distro_check
# If the setup variable file exists,