Don't list apps when there's not enough ram to install them

src/freedombone-app-etherpad

@@ -30,6 +30,7 @@ VARIANTS="full full-vim writer"
 
 IN_DEFAULT_INSTALL=0
 SHOW_ON_ABOUT=1
+MINIMUM_RAM_MB=2000
 
 ETHERPAD_DOMAIN_NAME=
 ETHERPAD_CODE=

src/freedombone-utils-selector

@@ -286,6 +286,25 @@ function app_not_on_onion_only {
     echo "1"
 }
 
+function enough_ram_for_app {
+    app_name="$1"
+
+    if ! grep -q "MINIMUM_RAM_MB=" "/usr/share/${PROJECT_NAME}/apps/${PROJECT_NAME}-app-${app_name}"; then
+        echo "0"
+        return
+    fi
+
+    minimum_ram_MB=$(grep "MINIMUM_RAM_MB=" "/usr/share/${PROJECT_NAME}/apps/${PROJECT_NAME}-app-${app_name}" | head -n 1 | awk -F '=' '{print $2}')
+    minimum_ram_bytes=$((minimum_ram_MB * 1024))
+
+    ram_available=$(grep MemTotal /proc/meminfo | awk '{print $2}')
+    if [ "$ram_available" -lt "$minimum_ram_bytes" ]; then
+        echo "1"
+        return
+    fi
+    echo "0"
+}
+
 # detects what apps are available
 function detect_apps {
     FILES="/usr/share/${PROJECT_NAME}/apps/${PROJECT_NAME}-app-*"
@@ -299,6 +318,7 @@ function detect_apps {
     for filename in $FILES
     do
         app_name=$(echo "${filename}" | awk -F '-app-' '{print $2}')
+        if [[ $(enough_ram_for_app "$app_name") != "0" ]]; then
             if [[ $(app_not_on_onion_only "$app_name") != "0" ]]; then
                 # shellcheck disable=SC2068
                 if ! item_in_array "${app_name}" ${APPS_AVAILABLE[@]}; then
@@ -306,6 +326,7 @@ function detect_apps {
                     APPS_CHOSEN+=("0")
                 fi
             fi
+        fi
     done
 
     function_check get_apps_installed
@@ -333,6 +354,7 @@ function detect_installable_apps {
     do
         app_name=$(echo "${filename}" | awk -F '-app-' '{print $2}')
 
+        if [[ $(enough_ram_for_app "$app_name") != "0" ]]; then
             if [[ $(app_not_on_onion_only "$app_name") != "0" ]]; then
                 # shellcheck disable=SC2068
                 if ! item_in_array "${app_name}" ${APPS_AVAILABLE[@]}; then
@@ -348,6 +370,7 @@ function detect_installable_apps {
                     fi
                 fi
             fi
+        fi
     done
 }
 
@@ -367,6 +390,7 @@ function detect_installed_apps {
     do
         app_name=$(echo "${filename}" | awk -F '-app-' '{print $2}')
 
+        if [[ $(enough_ram_for_app "$app_name") != "0" ]]; then
             if [[ $(app_not_on_onion_only "$app_name") != "0" ]]; then
                 if [[ $(app_is_installed "$app_name") == "1" ]]; then
                     # shellcheck disable=SC2068
@@ -379,6 +403,7 @@ function detect_installed_apps {
                     fi
                 fi
             fi
+        fi
     done
 }
 
@@ -404,6 +429,7 @@ function choose_apps_for_variant {
     for filename in $FILES
     do
         app_name=$(echo "${filename}" | awk -F '-app-' '{print $2}')
+        if [[ $(enough_ram_for_app "$app_name") != "0" ]]; then
             if [[ $(app_not_on_onion_only "$app_name") != "0" ]]; then
                 # shellcheck disable=SC2068
                 if item_in_array "${app_name}" ${APPS_AVAILABLE[@]}; then
@@ -428,6 +454,7 @@ function choose_apps_for_variant {
                     fi
                 fi
             fi
+        fi
     done
 
     function_check get_apps_installed