freedombone/src/freedombone-utils-selector

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#!/bin/bash
#
# .---. . .
# | | |
# |--- .--. .-. .-. .-.| .-. .--.--. |.-. .-. .--. .-.
# | | (.-' (.-' ( | ( )| | | | )( )| | (.-'
# ' ' --' --' -' - -' ' ' -' -' -' ' - --'
#
# Freedom in the Cloud
#
# Functions for selecting which apps to install or remove
#
# License
# =======
#
# Copyright (C) 2015-2016 Bob Mottram <bob@robotics.uk.to>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# Array containing names of available apps
APPS_AVAILABLE=()
# Array containing 1 or 0 indicating installed apps
APPS_INSTALLED=()
# Apps selected with checklist
APPS_CHOSEN=()
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# A list of the names of installed apps
APPS_INSTALLED_NAMES=()
# file containing a list of removed apps
REMOVED_APPS_FILE=/root/removed
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# gets the variants list from an app script
function app_variants {
filename=$1
variants_line=$(cat ${filename} | grep "VARIANTS=")
if [[ "$variants_line" == *"'"* ]]; then
variants_list=$(echo "$variants_line" | awk -F '=' '{print $2}' | awk -F "'" '{print $2}')
else
variants_list=$(echo "$variants_line" | awk -F '=' '{print $2}' | awk -F '"' '{print $2}')
fi
echo "$variants_list"
}
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# whether a given item is in an array
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function item_in_array {
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local e
for e in "${@:2}"; do [[ "$e" == "$1" ]] && return 0; done
return 1
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}
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# mark a given app as having been removed so that it doesn't get reinstalled on updates
function remove_app {
app_name=$1
if [ ! -f $REMOVED_APPS_FILE ]; then
touch $REMOVED_APPS_FILE
fi
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if ! grep -Fxq "-$app_name" $REMOVED_APPS_FILE; then
echo "-$app_name" >> $REMOVED_APPS_FILE
fi
}
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# returns 1 if an app has been marked as removed
function app_is_removed {
app_name="$1"
if [ ! -f $REMOVED_APPS_FILE ]; then
echo "0"
return
fi
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if ! grep -Fxq "-$app_name" $REMOVED_APPS_FILE; then
echo "0"
else
echo "1"
fi
}
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# Allows an app to be reinstalled even if it was previously marked as being removed
function reinstall_app {
app_name=$1
if [ ! -f $REMOVED_APPS_FILE ]; then
return
fi
if [[ $(app_is_removed $app_name) == "1" ]]; then
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sed -i "/-${app_name}/d" $REMOVED_APPS_FILE
fi
}
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# returns 1 if an app is installed
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function app_is_installed {
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app_name="$1"
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# Why does this secondary file exist, apart from COMPLETION_FILE ?
# It's so that it is visible to unprivileged users from the user control panel
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INSTALLED_APPS_LIST=/usr/share/${PROJECT_NAME}/installed.txt
if [ -f $INSTALLED_APPS_LIST ]; then
if ! grep -Fxq "install_${app_name}" $INSTALLED_APPS_LIST; then
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echo "0"
else
echo "1"
fi
return
fi
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# check the completion file to see if it was installed
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if [ ! -f $COMPLETION_FILE ]; then
echo "0"
return
fi
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if ! grep -Fxq "install_${app_name}" $COMPLETION_FILE; then
echo "0"
else
echo "1"
fi
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}
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# called at the end of the install section of an app script
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function install_completed {
if [ ! ${1} ]; then
exit 673935
fi
echo "install_${1}" >> $COMPLETION_FILE
}
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# populates an array of "0" or "1" for whether apps are installed
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function get_apps_installed {
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for a in "${APPS_AVAILABLE[@]}"
do
APPS_INSTALLED+=("$(app_is_installed $a)")
done
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}
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# populates an array of installed app names
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function get_apps_installed_names {
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APPS_INSTALLED_NAMES=()
for a in "${APPS_AVAILABLE[@]}"
do
if [[ $(app_is_installed $a) == "1" ]]; then
APPS_INSTALLED_NAMES+=("$a")
fi
done
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}
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# detects what apps are available
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function detect_apps {
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FILES=/usr/share/${PROJECT_NAME}/apps/${PROJECT_NAME}-app-*
APPS_AVAILABLE=()
APPS_CHOSEN=()
# for all the app scripts
for filename in $FILES
do
app_name=$(echo "${filename}" | awk -F '-app-' '{print $2}')
if [[ $(item_in_array ${app_name} ${APPS_AVAILABLE[@]}) != 0 ]]; then
APPS_AVAILABLE+=("${app_name}")
APPS_CHOSEN+=("0")
fi
done
function_check get_apps_installed
get_apps_installed
get_apps_installed_names
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}
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# detects what apps are available and can be installed
# If the variants list within an app script is an empty string then
# it is considered to be too experimental to be installable
function detect_installable_apps {
FILES=/usr/share/${PROJECT_NAME}/apps/${PROJECT_NAME}-app-*
APPS_AVAILABLE=()
APPS_CHOSEN=()
APPS_INSTALLED=()
APPS_INSTALLED_NAMES=()
function_check app_is_installed
# for all the app scripts
for filename in $FILES
do
app_name=$(echo "${filename}" | awk -F '-app-' '{print $2}')
if [[ $(item_in_array ${app_name} ${APPS_AVAILABLE[@]}) != 0 ]]; then
variants_list=$(app_variants $filename)
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# check for empty string
if [ ${#variants_list} -gt 0 ]; then
APPS_AVAILABLE+=("${app_name}")
APPS_CHOSEN+=("0")
APPS_INSTALLED+=("$(app_is_installed $app_name)")
if [[ $(app_is_installed $app_name) == "1" ]]; then
APPS_INSTALLED_NAMES+=("$app_name")
fi
fi
fi
done
}
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# creates the APPS_AVAILABLE and APPS_CHOSEN arrays based on
# the given variant name
function choose_apps_for_variant {
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variant_name="$1"
FILES=/usr/share/${PROJECT_NAME}/apps/${PROJECT_NAME}-app-*
APPS_AVAILABLE=()
APPS_CHOSEN=()
# for all the app scripts
for filename in $FILES
do
app_name=$(echo "${filename}" | awk -F '-app-' '{print $2}')
if [[ $(item_in_array ${app_name} ${APPS_AVAILABLE[@]}) != 0 ]]; then
APPS_AVAILABLE+=("${app_name}")
if grep -q "VARIANTS=" ${filename}; then
variants_list=$(app_variants $filename)
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if [[ "${variants_list}" == 'all'* || \
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"${variants_list}" == "$variant_name "* || \
"${variants_list}" == *" $variant_name "* || \
"${variants_list}" == *" $variant_name" ]]; then
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if [[ $(app_is_removed ${a}) == "0" ]]; then
APPS_CHOSEN+=("1")
else
APPS_CHOSEN+=("0")
fi
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else
APPS_CHOSEN+=("0")
fi
else
APPS_CHOSEN+=("0")
fi
fi
done
function_check get_apps_installed
get_apps_installed
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}
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# show a list of apps which have been chosen
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function list_chosen_apps {
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app_index=0
for a in "${APPS_AVAILABLE[@]}"
do
if [[ ${APPS_CHOSEN[$app_index]} == "1" ]]; then
echo $"${a}"
fi
app_index=$[app_index+1]
done
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}
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function remove_apps {
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app_index=0
for a in "${APPS_AVAILABLE[@]}"
do
if [[ ${APPS_INSTALLED[$app_index]} == "1" ]]; then
if [[ ${APPS_CHOSEN[$app_index]} == "0" ]]; then
echo $"Removing application: ${a}"
remove_app ${a}
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remove_${a}
echo $"${a} was removed"
fi
fi
app_index=$[app_index+1]
done
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update_installed_apps_list
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}
function install_apps {
is_interactive=$1
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app_index=0
for a in "${APPS_AVAILABLE[@]}"
do
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if [[ $(app_is_removed ${a}) == "0" ]]; then
if [[ ${APPS_INSTALLED[$app_index]} == "0" ]]; then
if [[ ${APPS_CHOSEN[$app_index]} == "1" ]]; then
if [ ${is_interactive} ]; then
# interactively obtain settings for this app
if [[ $(function_exists install_interactive_${a}) == "1" ]]; then
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install_interactive_${a}
fi
fi
fi
fi
fi
app_index=$[app_index+1]
done
app_index=0
for a in "${APPS_AVAILABLE[@]}"
do
if [[ ${APPS_INSTALLED[$app_index]} == "0" ]]; then
if [[ ${APPS_CHOSEN[$app_index]} == "1" ]]; then
if [ ${is_interactive} ]; then
reinstall_app ${a}
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echo $"Installing application from interactive: ${a}"
install_${a}
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echo $"${a} was installed from interactive"
else
if [[ $(app_is_removed ${a}) == "0" ]]; then
echo $"Installing application: ${a}"
install_${a}
echo $"${a} was installed"
else
echo $"${a} has been removed and so will not be reinstalled"
fi
fi
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fi
fi
app_index=$[app_index+1]
done
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update_installed_apps_list
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}
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# NOTE: deliberately no exit 0