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rename function to pkgapp_packages_required
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pick performance patches from #2557

if a secondary OR package is already installed and the first is not, list that as required instead of the first

don't redefine $arch, remove -qq flag

4 places in api use apt-cache policy, only 1 has -qq so it's probably fine to remove it. Otherwise it should go everywhere.

Co-Authored-By: Botspot <[email protected]>
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@theofficialgman @Botspot
theofficialgman and Botspot committed Mar 4, 2024
1 parent 63b7627 commit afc53a0
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Showing 3 changed files with 51 additions and 70 deletions.
117 changes: 49 additions & 68 deletions api
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Original file line number Diff line number Diff line change
Expand Up @@ -123,9 +123,9 @@ package_installed() { #exit 0 if $1 package is installed, otherwise exit 1

package_available() { #determine if the specified package-name exists in a local repository for the current dpkg architecture
local package="$1"
local arch="$(dpkg --print-architecture)"
local dpkg_arch="$(dpkg --print-architecture)"
[ -z "$package" ] && error "package_available(): no package name specified!"
local output="$(apt-cache policy -qq "$package":"$arch" | grep "Candidate:")"
local output="$(apt-cache policy "$package":"$dpkg_arch" | grep "Candidate:")"
if [ -z "$output" ]; then
return 1
elif echo "$output" | grep -q "Candidate: (none)"; then
Expand Down Expand Up @@ -1468,13 +1468,13 @@ app_type() { #there are 'standard' apps, and there are 'package' apps - an alias
#if neither conditional above evaluated to true, no output will be returned and the function exits with code 1
}

packages_file_required() { #Returns which packages are required during installation of a package-app - handle the '|' separater
pkgapp_packages_required() { #Returns which packages are required during installation of a package-app - handle the '|' separater
#returns no output if not all required packages are available
local app="$1"
[ -z "$app" ] && error "packages_file_required(): no app specified!"
[ -z "$app" ] && error "pkgapp_packages_required(): no app specified!"

if [ ! -f "${DIRECTORY}/apps/$app/packages" ];then
error "packages_file_required(): This app '$app' does not have a packages file!"
error "pkgapp_packages_required(): This app '$app' does not have a packages file!"
fi

local IFS=' '
Expand All @@ -1486,20 +1486,34 @@ packages_file_required() { #Returns which packages are required during installat
if [[ "$word" == *'|'* ]];then
IFS='|'
local package
local available="no"
local found="no"
#first check for any already installed packages
#if a package is already installed, it should be used even if it is not the first option in the OR
for package in $word ;do
if package_installed "$package" ;then
packages+="$package "
found="yes"
break
fi
done
if [ "$found" == "yes" ]; then
#a package in the OR is already installed
continue
fi
#then check for available packages
for package in $word ;do
if package_available "$package" ;then
packages+="$package "
available="yes"
found="yes"
break
fi
done
if [ "$available" == "no" ]; then
if [ "$found" == "no" ]; then
#no package in the OR is available so set the output as empty
packages=''
break
fi
else
else #non-OR package - no parsing '|' separators
if package_available "$word" ;then
#no separator, so return it without change
packages+="$word "
Expand Down Expand Up @@ -1535,7 +1549,7 @@ will_reinstall() { #return 0 if $1 app will be reinstalled during an update, oth
return 0
elif [ "$new_scriptname" == packages ];then
#update to package-app: rather than check for file change, check if the installed package(s) would be different (avoid reinstall when adding an alternative package name with '|')
if [ "$(packages_file_required "$app")" != "$(DIRECTORY="${DIRECTORY}/update/pi-apps" packages_file_required "$app")" ];then
if [ "$(pkgapp_packages_required "$app")" != "$(DIRECTORY="${DIRECTORY}/update/pi-apps" pkgapp_packages_required "$app")" ];then
return 0
else
return 1
Expand Down Expand Up @@ -1762,7 +1776,7 @@ refresh_pkgapp_status() { #for the specified package-app, if dpkg thinks it's in
# optional: directly pass package as second input argument (can be null for when you want to mark an app as hidden)
if [ -z ${2+x} ]; then
#From the list of necessary packages for the $app app, get the first one that is available in the repos
local package="$(packages_file_required "$app" | awk '{print $1}')"
local package="$(pkgapp_packages_required "$app" | awk '{print $1}')"
else
local package="$(echo "$2" | awk '{print $1}')"
fi
Expand All @@ -1780,7 +1794,7 @@ refresh_pkgapp_status() { #for the specified package-app, if dpkg thinks it's in
echo 'installed' > "${DIRECTORY}/data/status/${app}"
shlink_link "$app" install &
fi
#if that package is not installed, then it only exists on the repositories, the packages_file_required function output guarantees it
#if that package is not installed, then it only exists on the repositories, the pkgapp_packages_required function output guarantees it
else
#the package for the $app app is not installed but it is available, so mark this app as uninstalled
if [ "$(app_status "$app")" != 'uninstalled' ];then
Expand All @@ -1802,73 +1816,40 @@ refresh_pkgapp_status() { #for the specified package-app, if dpkg thinks it's in
refresh_all_pkgapp_status() { #for every package-app, if dpkg thinks it's installed, then mark it as installed.
#repeat for every package-type app
local IFS=$'\n'
local arch="$(dpkg --print-architecture)"
local dpkg_arch="$(dpkg --print-architecture)"
# get list of all packages needed by package apps
# this variable needs to be global to be accessible from the subshells
local packages="$(sed '' -- "${DIRECTORY}"/apps/*/packages | sed 's/ | /\n/g' | sed 's/ /\n/g' | awk NF | sed 's/$/:'"$arch"'/' | tr '\n' ' ')"
local packages="$(sed '' -- "${DIRECTORY}"/apps/*/packages | sed 's/ | /\n/g' | sed 's/ /\n/g' | awk NF | sed 's/$/:'"$dpkg_arch"'/' | tr '\n' ' ')"
packages="${packages::-1}" #remove final space character

# get policy info for all packages needed by package apps
# this variable needs to be global to be accessible from the subshells
local apt_cache_output="$(echo "$packages" | xargs -r apt-cache policy)"

#redefine package_installed to only read /var/lib/dpkg/status once
local dpkg_status="$(grep -x "Package: \($(echo "$packages" | sed 's/:'"$arch"'//g ; s/ /\\|/g')\)" -A 2 /var/lib/dpkg/status)"

#redefine package_available() to use apt_cache_output and avoid running apt-cache multiple times
(package_available() { #this will only be used in this function's subprocesses.
echo "$apt_cache_output" | grep -x "${1}:" -A2 | grep -vxF " Candidate: (none)" | grep -q "^ Candidate:"
}

#this one only takes off 0.1s on my pi5, so if it causes issues it could be removed
package_installed() { #exit 0 if $1 package is installed, otherwise exit 1
local package="$1"
[ -z "$package" ] && error "package_installed(): no package specified!"
#find the package listed in /var/lib/dpkg/status
#package_info "$package"

#directly search /var/lib/dpkg/status
echo "$dpkg_status" | grep -x "Package: $package" -A 2 -m1 | grep -qxF 'Status: install ok installed'
}

# parse apt_cache_output for each package app
# generate list of all packages needed by package apps
for app in $(list_apps package) ;do
local IFS=' '
local word=''
local needed_packages=''
#read each word - packages separated by '|' are 1 word
for word in $(cat "${DIRECTORY}/apps/$app/packages" | sed 's/ | /|/g') ;do
local available="no"
if [[ "$word" == *'|'* ]];then
IFS='|'
local package
for package in $word ;do
local package_output="$(echo "$apt_cache_output" | grep "^$package:" -A2 | grep "Candidate:")"
if [ -z "$package_output" ]; then
# package is not available
package=''
continue
elif echo "$package_output" | grep -q "Candidate: (none)"; then
# package is not available
package=''
continue
else
# package is available
available="yes"
needed_packages+="$package "
break
fi
done
if [ "$available" == "no" ]; then
#no package in the OR is available
break
fi
else
local package_output="$(echo "$apt_cache_output" | grep "^$word:" -A2 | grep "Candidate:")"
if [ -z "$package_output" ]; then
# package is not available
break
elif echo "$package_output" | grep -q "Candidate: (none)"; then
# package is not available
break
else
# package is available
available="yes"
needed_packages+="$word "
fi
fi
done
if [ "$available" == "no" ]; then
#at least one required package is not available so set package as hidden
refresh_pkgapp_status "$app" ""
else
needed_packages="${needed_packages::-1}"
debug "$app: $needed_packages"
refresh_pkgapp_status "$app" "$needed_packages"
fi
done
refresh_pkgapp_status "$app" #with redefined package_available and package_installed this is fast
done)
}

refresh_app_list() { #Force-regenerate the app list
Expand Down
2 changes: 1 addition & 1 deletion gui
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Original file line number Diff line number Diff line change
Expand Up @@ -324,7 +324,7 @@ details_window() { #input: prefix/app

#If package-app, show what packages it installs
if [ -f "${DIRECTORY}/apps/${app}/packages" ];then
local packages="$(packages_file_required "$app")"
local packages="$(pkgapp_packages_required "$app")"
if [ -z "$packages" ]; then
#returned required package list is empty. application cannot be installed
#this case cannot be hit if the application is already hidden which it should be
Expand Down
2 changes: 1 addition & 1 deletion manage
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Original file line number Diff line number Diff line change
Expand Up @@ -666,7 +666,7 @@ elif [ "$1" == 'install' ] || [ "$1" == 'uninstall' ];then

else #package-app: directly use apt to install what is mentioned in the packages file

packages_to_install=$(packages_file_required "$app")
packages_to_install=$(pkgapp_packages_required "$app")
[ -z "$packages_to_install" ] && error "It appears $app does not have any packages that can be installed on your system."

appscript=(bash -c -o pipefail "apt_lock_wait ; sudo -E apt $(echo "$action" | sed 's/uninstall/purge --autoremove/g') -yf $packages_to_install 2>&1 | less_apt")
Expand Down

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