Add migration from 2.16

scripts/_future.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+
+# source: https://github.com/YunoHost/yunohost/commit/4f62eb5320323d4f4de83b2af306ae53e89bc5ba
+# Define and install dependencies with a equivs control file
+# This helper can/should only be called once per app
+#
+# usage: ynh_install_app_dependencies dep [dep [...]]
+# | arg: dep - the package name to install in dependence
+ynh_install_app_dependencies () {
+    dependencies=$@
+    manifest_path="../manifest.json"
+    if [ ! -e "$manifest_path" ]; then
+    	manifest_path="../settings/manifest.json"	# Into the restore script, the manifest is not at the same place
+    fi
+    version=$(grep '\"version\": ' "$manifest_path" | cut -d '"' -f 4)	# Retrieve the version number in the manifest file.
+    dep_app=${app//_/-}	# Replace all '_' by '-'
+
+    cat > /tmp/${dep_app}-ynh-deps.control << EOF	# Make a control file for equivs-build
+Section: misc
+Priority: optional
+Package: ${dep_app}-ynh-deps
+Version: ${version}
+Depends: ${dependencies// /, }
+Architecture: all
+Description: Fake package for ${app} (YunoHost app) dependencies
+ This meta-package is only responsible of installing its dependencies.
+EOF
+    ynh_package_install_from_equivs /tmp/${dep_app}-ynh-deps.control \
+        || ynh_die "Unable to install dependencies"	# Install the fake package and its dependencies
+    rm /tmp/${dep_app}-ynh-deps.control
+    ynh_app_setting_set $app apt_dependencies $dependencies
+}

scripts/backup

@@ -14,6 +14,7 @@ fi
 
 source _common.sh
 source /usr/share/yunohost/helpers
+source _future.sh
 
 ynh_abort_if_errors
 

scripts/change_url

@@ -8,6 +8,7 @@
 set -eu
 source _common.sh
 source /usr/share/yunohost/helpers
+source _future.sh
 
 #=================================================
 # RETRIEVE ARGUMENTS

scripts/install

@@ -8,6 +8,7 @@
 set -eu
 source _common.sh
 source /usr/share/yunohost/helpers
+source _future.sh
 
 #=================================================
 # MANAGE SCRIPT FAILURE

scripts/remove

@@ -8,6 +8,7 @@
 
 source _common.sh
 source /usr/share/yunohost/helpers
+source _future.sh
 
 #=================================================
 # LOAD SETTINGS

scripts/restore

@@ -14,6 +14,7 @@ fi
 
 source _common.sh
 source /usr/share/yunohost/helpers
+source _future.sh
 
 ynh_abort_if_errors
 

scripts/upgrade

@@ -7,6 +7,7 @@
 #=================================================
 source _common.sh
 source /usr/share/yunohost/helpers
+source _future.sh
 
 ynh_abort_if_errors
 
@@ -44,28 +45,6 @@ previous_version=$(cat freeze.pip | grep "Weblate==" | sed "s|Weblate==||")
 previous_version_file="../conf/settings_history/settings.$previous_version.py"
 test -e "$previous_version_file" || ynh_die "Previous version unknown: $previous_version"
 
-case "$previous_version" in
-
-2.16) python_ver=2.7
-    ;;
-2.17.1) python_ver=2.7
-    ;;
-*) python_ver=3.4
-   ;;
-esac
-
-settings="$final_path/venv/lib/python2.7/site-packages/weblate/settings.py"
-
-#save memc_port if it doesn't exist
-if [[ -z "$memc_port" ]]
-then
-	memc_port=$(cat "$settings" \
-		| grep "'LOCATION': '127.0.0.1:" \
-		| sed "s|.*:\\(.*\\)'.*|\\1|")
-	ynh_app_setting_set "$app" memc_port "$memc_port"
-fi
-
-
 #=================================================
 # ENSURE DOWNWARD COMPATIBILITY
 #=================================================
@@ -83,6 +62,26 @@ if [ -z "$db_name" ]; then	# If db_name doesn't exist, create it
 	ynh_app_setting_set "$app" db_name "$db_name"
 fi
 
+# handle python3 migration (because of django 2.0)
+if [[ -e "$final_path/venv/lib/python2.7/site-packages/weblate/settings.py" ]]
+then
+	settings="$final_path/venv/lib/python2.7/site-packages/weblate/settings.py"
+	migrate_py2to3=true
+else
+	settings="$final_path/venv/lib/python3.4/site-packages/weblate/settings.py"
+	migrate_py2to3=false
+fi
+
+# save memc_port if it doesn't exist
+if [[ -z "$memc_port" ]]
+then
+	memc_port=$(cat "$settings" \
+		| grep "'LOCATION': '127.0.0.1:" \
+		| sed "s|.*:\\(.*\\)'.*|\\1|")
+	ynh_app_setting_set "$app" memc_port "$memc_port"
+fi
+
+# migrade old uwsgi files if existing
 if [ -e "/etc/systemd/system/$app.service" ]
 then
 	systemctl stop "$app.service"
@@ -103,10 +102,6 @@ path_url=$(ynh_normalize_url_path "$path_url")
 # STANDARD UPGRADE STEPS
 #=================================================
 
-#=================================================
-# NGINX CONFIGURATION
-#=================================================
-
 # Create a dedicated nginx config
 ynh_add_nginx_config
 
@@ -131,6 +126,14 @@ chsh --shell /bin/bash "$app"
 
 #=================================================
 # SPECIFIC UPGRADE
+#=================================================
+# Update dependencies
+#=================================================
+
+ynh_install_app_dependencies libxml2-dev libxslt-dev libfreetype6-dev \
+	libjpeg-dev libz-dev libyaml-dev python3-dev python3-pip python3-virtualenv python-virtualenv \
+	postgresql libpq-dev uwsgi uwsgi-plugin-python3 memcached
+
 #=================================================
 # SPECIFIC SETUP uwsgi
 #=================================================
@@ -141,6 +144,24 @@ ynh_add_uwsgi_service
 # PIP INSTALLATION
 #=================================================
 
+# save old settings file
+cp "$settings" "$final_path/settings.$previous_version.old.py"
+# handle python3 migration
+if [[ "$migrate_py2to3" = true ]]
+then
+	ynh_secure_remove "$final_path/venv"
+	virtualenv --python=python3 "${final_path}/venv"
+	set +o nounset
+	source "${final_path}/venv/bin/activate"
+	set -o nounset
+	pip install --upgrade pip
+	pip install Weblate=="$current_version"
+
+	settings="$final_path/venv/lib/python3.4/site-packages/weblate/settings.py"
+	cp "$final_path/settings.$previous_version.old.py" "$settings"
+	ynh_store_file_checksum "$settings"
+fi
+
 old_settings="./settings.$previous_version.old.py"
 settings_diff="$final_path/settings.${previous_version}_${current_version}.diff"
 
@@ -148,6 +169,7 @@ settings_diff="$final_path/settings.${previous_version}_${current_version}.diff"
 	set +o nounset
 	source "${final_path}/venv/bin/activate"
 	set -o nounset
+	pip install --upgrade pip
 	pip install Weblate=="$current_version"
 	pip install python-bidi PyYaML Babel pyuca pylibravatar py3dns psycopg2 python-memcached
 	# specific to YunoHost package: