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Use fewer subshells and descriptive variables.

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Signed-off-by: Dan Schaper <dan.schaper@pi-hole.net>
This commit is contained in:
Dan Schaper 2020-08-14 11:42:54 -07:00
parent bb1a6243d6
commit 57e65dd5c0
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GPG Key ID: B4FF14C01CC08DC0
1 changed files with 10 additions and 14 deletions
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24
automated install/basic-install.sh
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@ -182,15 +182,11 @@ os_check() {
if [ "$PIHOLE_SKIP_OS_CHECK" != true ]; then
# This function gets a list of supported OS versions from a TXT record at versions.pi-hole.net
# and determines whether or not the script is running on one of those systems
local remote_os_domain valid_os valid_version detected_os_pretty detected_os detected_version display_warning
local remote_os_domain valid_os valid_version detected_os detected_version display_warning
remote_os_domain="versions.pi-hole.net"
valid_os=false
valid_version=false
display_warning=true
detected_os_pretty=$(cat /etc/*release | grep PRETTY_NAME | cut -d '=' -f2- | tr -d '"')
detected_os="${detected_os_pretty%% *}"
detected_version=$(cat /etc/*release | grep VERSION_ID | cut -d '=' -f2- | tr -d '"')
detected_os=$(grep "\bID\b" /etc/os-release | cut -d '=' -f2 | tr -d '"')
detected_version=$(grep VERSION_ID /etc/os-release | cut -d '=' -f2 | tr -d '"')
IFS=" " read -r -a supportedOS < <(dig +short -t txt ${remote_os_domain} @ns1.pi-hole.net | tr -d '"')
@ -198,17 +194,17 @@ os_check() {
printf " %b %bRetrieval of supported OS failed. Please contact support. %b\\n" "${CROSS}" "${COL_LIGHT_RED}" "${COL_NC}"
exit 1
else
for i in "${supportedOS[@]}"
for distro_and_versions in "${supportedOS[@]}"
do
os_part=$(echo "$i" | cut -d '=' -f1)
versions_part=$(echo "$i" | cut -d '=' -f2-)
distro_part="${distro_and_versions%%=*}"
versions_part="${distro_and_versions##*=}"
if [[ "${detected_os}" =~ ${os_part} ]]; then
if [[ "${detected_os^^}" =~ ${distro_part^^} ]]; then
valid_os=true
IFS="," read -r -a supportedVer <<<"${versions_part}"
for x in "${supportedVer[@]}"
for version in "${supportedVer[@]}"
do
if [[ "${detected_version}" =~ $x ]];then
if [[ "${detected_version}" =~ $version ]]; then
valid_version=true
break
fi
@ -222,7 +218,7 @@ os_check() {
display_warning=false
fi
if [ "$display_warning" = true ]; then
if [ "$display_warning" != false ]; then
printf " %b %bUnsupported OS detected: %s%b\\n" "${CROSS}" "${COL_LIGHT_RED}" "${detected_os_pretty}" "${COL_NC}"
printf " https://docs.pi-hole.net/main/prerequesites/#supported-operating-systems\\n"
printf "\\n"