add ynh_read_manifest_2

scripts/upgrade

@@ -8,6 +8,7 @@
 
 source _common.sh
 source ynh_systemd_action
+source ynh_read_manifest_2
 source ynh_check_app_version_changed
 source /usr/share/yunohost/helpers
 

scripts/ynh_read_manifest_2

@@ -0,0 +1,51 @@
+#!/bin/bash
+
+# Need also the helper https://github.com/YunoHost-Apps/Experimental_helpers/blob/master/ynh_handle_getopts_args/ynh_handle_getopts_args
+
+# Read the value of a key in a ynh manifest file
+#
+# usage: ynh_read_manifest manifest key
+# | arg: -m, --manifest= - Path of the manifest to read
+# | arg: -k, --key= - Name of the key to find
+ynh_read_manifest () {
+	# Declare an array to define the options of this helper.
+	declare -Ar args_array=( [m]=manifest= [k]=key= )
+	local manifest
+	local key
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	python3 -c "import sys, json;print(json.load(open('$manifest', encoding='utf-8'))['$key'])"
+}
+
+# Read the upstream version from the manifest
+# The version number in the manifest is defined by <upstreamversion>~ynh<packageversion>
+# For example : 4.3-2~ynh3
+# This include the number before ~ynh
+# In the last example it return 4.3-2
+#
+# usage: ynh_app_upstream_version
+ynh_app_upstream_version () {
+    manifest_path="../manifest.json"
+    if [ ! -e "$manifest_path" ]; then
+        manifest_path="../settings/manifest.json"	# Into the restore script, the manifest is not at the same place
+    fi
+    version_key=$(ynh_read_manifest --manifest="$manifest_path" --key="version")
+    echo "${version_key/~ynh*/}"
+}
+
+# Read package version from the manifest
+# The version number in the manifest is defined by <upstreamversion>~ynh<packageversion>
+# For example : 4.3-2~ynh3
+# This include the number after ~ynh
+# In the last example it return 3
+#
+# usage: ynh_app_package_version
+ynh_app_package_version () {
+    manifest_path="../manifest.json"
+    if [ ! -e "$manifest_path" ]; then
+        manifest_path="../settings/manifest.json"	# Into the restore script, the manifest is not at the same place
+    fi
+    version_key=$(ynh_read_manifest --manifest="$manifest_path" --key="version")
+    echo "${version_key/*~ynh/}"
+}