Add support for post-install commands

managetests/branches.py

@@ -281,6 +281,11 @@ class Branch:
         if total == 0:
             log("[!] Warning: no artifact was installed!")
 
+        # Execute the post-install commands
+        if "after_install" in self.config:
+            for cmd in self.config["after_install"]:
+                self.exec_command(cmd, build=True)
+
         # Check if the branch was successifully built
         popen_args = self.command_popen_args(self.config["run"])
         if os.path.exists(popen_args[0][0][0]):