Merge pull request #1151 from ericgaspar/ynh_exec_as

Add ynh_exec_as to official

data/helpers.d/user

@@ -163,3 +163,27 @@ ynh_system_user_delete () {
         delgroup $username
     fi
 }
+
+# Execute a command as another user
+#
+# usage: ynh_exec_as --user=USER --command=COMMAND [ARG ...]
+# | arg: -u, --user=        - the user that will execute the command
+# | arg: -n, --command=     - the command to be executed
+#
+# Requires YunoHost version 4.1.7 or higher.
+ynh_exec_as()
+{
+    # Declare an array to define the options of this helper.
+    local legacy_args=uc
+    local -A args_array=( [u]=user= [c]=command= )
+    local user
+    local command
+    # Manage arguments with getopts
+    ynh_handle_getopts_args "$@"
+
+    if [[ $user = $(whoami) ]]; then
+        eval "$command"
+    else
+        sudo -u "$user" "$command"
+    fi
+}