support pre-run, post-run commands

recipe.json

@@ -2,6 +2,14 @@
     "log_file": "/etc/vanilla/first-setup.log",
     "distro_name": "Vanilla OS",
     "distro_logo": "io.github.vanilla-os.FirstSetup", 
+    "pre_run": [
+        "sudo apt update", 
+        "sudo apt install -f"
+    ],
+    "post_run": [
+        "sudo apt update", 
+        "sudo apt install -f"
+    ],
     "steps": {
         "welcome": {
             "template": "welcome"
@@ -115,7 +123,7 @@
                     "if": "immutability",
                     "type": "command",
                     "commands": [
-                        "sudo apt install -y almost",
+                        "sudo apt install -y almost almost-extras",
                         "sudo almost enter rw"
                     ]
                 }

vanilla_first_setup/utils/processor.py

@@ -26,7 +26,9 @@ logger = logging.getLogger("FirstSetup::Processor")
 class Processor:
 
     @staticmethod
-    def run(log_path, commands):
+    def run(log_path, pre_run, post_run, commands):
+        command = pre_run + commands + post_run
+
         logger.info("processing the following commands: \n%s" %
                     '\n'.join(commands))
 
@@ -65,7 +67,8 @@ class Processor:
                     log.flush()
             except Exception as e:
                 logger.warning("failed to write to the log file: %s" % e)
-                logger.warning("the output of the commands is: %s" % proc.stdout)
+                logger.warning("the output of the commands is: %s" %
+                                 proc.stdout.decode('utf-8'))
 
             if proc.returncode != 0:
                 logger.critical(

vanilla_first_setup/window.py

@@ -69,7 +69,12 @@ class VanillaWindow(Adw.ApplicationWindow):
             commands = Parser.parse(finals)
 
             # process the commands
-            return Processor.run(self.recipe["log_file"], commands)
+            return Processor.run(
+                self.recipe.get("log_file", "/tmp/vanilla_first_setup.log"), 
+                self.recipe.get("pre_run", []),
+                self.recipe.get("post_run"),
+                commands
+            )
 
         def on_done(result, *args):
             self.__view_done.set_result(result)