Add user_init_commands and root_init_commands lists so config files can append init commands successively without overwriting each other.

otherworld

@@ -80,8 +80,9 @@ def docker_create_user (container, user, uid=None):
 def docker_start (container):
     call(["docker", "start", container])
 
-def docker_exec (container, command, user, env={}, work_dir=None):
-    call(["docker", "exec", "--user", user, "-ti"] + \
+def docker_exec (container, command, user, env={}, tty=True, work_dir=None):
+    call(["docker", "exec", "--user", user] + \
+         (["-ti" if tty else "-i"]) + \
          (["--workdir", work_dir] if work_dir else []) + \
          list(chain.from_iterable([["--env", f"{kv[0]}={kv[1]}"] for kv in env.items()])) + \
          [container] + command)
@@ -92,6 +93,9 @@ def docker_commit (container, image_name):
 def docker_rm (container):
     call(["docker", "rm", "-f", container])
 
+def docker_restart (container):
+    call(["docker", "restart", container])
+
 def docker_rmi (container):
     call(["docker", "rmi", "-f", container])
 
@@ -131,10 +135,72 @@ def expand_user_volumes (volumes):
 
     return mappings
 
-def find_config_files (config_name):
+def parse_command_line (command, config=None):
+    if config is None:
+        config = {
+            "actions": [],
+            "user_volumes": [],
+            "command_env": {}
+        }
+    
+    while len(command) > 0:
+        arg = command[0]
+        if arg == "--quiet":
+            command = command[1:]
+            config['quiet'] = True
+        elif arg == "--notty":
+            command = command[1:]
+            config['tty'] = False
+        elif arg == "--rm":
+            config['actions'].append("rm")
+            command = command[1:]
+        elif arg == "--restart":
+            config['actions'].append("restart")
+            command = command[1:]
+        elif arg == "--rmi":
+            config['actions'].append("rmi")
+            command = command[1:]
+        elif arg == "--commit":
+            config['actions'].append("commit")
+            command = command[1:]
+        elif arg == "--sudo":
+            config['command_user'] = "root"
+            command = command[1:]
+        elif arg.startswith("--container="):
+            config['container_name'] = arg[len("--container="):]
+            command = command[1:]
+        elif arg.startswith("--image="):
+            config['image_name'] = arg[len("--image="):]
+            command = command[1:]
+        elif arg.startswith("--build="):
+            config['build_path'] = arg[len("--build="):]
+            command = command[1:]
+        elif arg.startswith("--volume="):
+            config['user_volumes'].append(arg[len("--volume="):])
+            command = command[1:]
+        elif arg.startswith("--env="):
+            env_pair = arg[len("--env="):]
+            (key, value) = env_pair.split("=", 1)
+            config['command_env'][key] = value
+            command = command[1:]
+        elif arg == "--cd":
+            config['command_workdir'] = os.getcwd()
+            command = command[1:]
+        elif arg.startswith("--cd="):
+            config['command_workdir'] = arg[len("--cd="):]
+            command = command[1:]
+        elif arg == "--pull":
+            command = command[1:]
+            config['pull'] = True
+        else:
+            break
+    return (config, command)
+
+def find_config_files (config_names):
     config_files = []
     directory = os.path.abspath(os.getcwd())
     while True:
+        for config_name in config_names:
             config_file = os.path.join(directory, config_name)
             if os.path.exists(config_file):
                 config_files.append(config_file)
@@ -157,86 +223,69 @@ def load_config_files (namespace, config_files):
             exec(config_code.read(), {}, namespace)
     return dict([item for item in namespace.items() if item[0] in config_keys])
 
+def init_command_as_list (command):
+    if isinstance(command, str):
+        command = ["sh", "-c", command]
+    return command
+
+# parse options and command from command line
+(command_line_options, command) = parse_command_line(sys.argv[1:])
+actions = command_line_options['actions']
+
+quiet = command_line_options.get("quiet", False)
+def log (message, *args, **kwargs):
+    if quiet:
+        return
+    print(">> {}".format(message.format(*args, **kwargs)))
+
+tty = sys.stdout.isatty()
+
+# default config
 user = os.environ["USER"]
-uid = int(check_output(["id", "-u"]).strip())
-image_name = os.environ.get("OW_IMAGE", None)
-container_name = os.environ.get("OW_CONTAINER", f"{CONTAINER_NAME}_{user}")
-build_path = None
-
-command = sys.argv[1:]
-command_user = user
-user_volumes = USER_VOLUMES
-pull = False
-
-actions = []
-
-command_env = {}
-command_workdir = None
-
-quiet = False
-
-# load config from files
-config = load_config_files({
+config = {
     "command": command,
     "user": user,
-    "uid": uid,
-    "command_user": command_user,
-    "image_name": image_name,
-    "container_name": container_name,
-    "build_path": build_path,
-    "command_workdir": command_workdir,
-    "user_volumes": user_volumes,
-    "pull": pull,
-    "command_env": command_env,
-    "cwd": os.getcwd()
-}, find_config_files(OTHERWORLD_CONFIG))
-locals().update(config)
+    "uid": int(check_output(["id", "-u"]).strip()),
+    "command_user": user,
+    "image_name": os.environ.get("OW_IMAGE", None),
+    "container_name": command_line_options.get("container_name", os.environ.get("OW_CONTAINER", f"{CONTAINER_NAME}_{user}")),
+    "build_path": None,
+    "command_workdir": None,
+    "user_volumes": USER_VOLUMES,
+    "pull": False,
+    "command_env": {},
+    "cwd": os.getcwd(),
+    "tty": sys.stdout.isatty(),
+    "log": log,
+    "root_init_command": [],
+    "root_init_commmands": [],
+    "user_init_command": [],
+    "user_init_commands": [],
+    "docker_create_options": []
+}
 
-while len(command) > 0:
-    arg = command[0]
-    if arg == "--quiet":
-        command = command[1:]
-        quiet = True
-    elif arg == "--rm":
-        actions.append("rm")
-        command = command[1:]
-    elif arg == "--rmi":
-        actions.append("rmi")
-        command = command[1:]
-    elif arg == "--commit":
-        actions.append("commit")
-        command = command[1:]
-    elif arg == "--sudo":
-        command_user = "root"
-        command = command[1:]
-    elif arg.startswith("--container="):
-        container_name = arg[len("--container="):]
-        command = command[1:]
-    elif arg.startswith("--image="):
-        image_name = arg[len("--image="):]
-        command = command[1:]
-    elif arg.startswith("--build="):
-        build_path = arg[len("--build="):]
-        command = command[1:]
-    elif arg.startswith("--volume="):
-        user_volumes.append(arg[len("--volume="):])
-        command = command[1:]
-    elif arg.startswith("--env="):
-        env_pair = arg[len("--env="):]
-        (key, value) = env_pair.split("=", 1)
-        command_env[key] = value
-        command = command[1:]
-    elif arg == "--cd":
-        command_workdir = os.getcwd()
-        command = command[1:]
-    elif arg.startswith("--cd="):
-        command_workdir = arg[len("--cd="):]
-        command = command[1:]
-    elif arg == "--pull":
-        command = command[1:]
-        pull = True
+# load config from files
+config_files = find_config_files([
+    OTHERWORLD_CONFIG,
+    "{}{}".format(config['container_name'], OTHERWORLD_CONFIG)
+])
+
+for config_file in config_files:
+    log("Loading config file {}", config_file)
+
+config = load_config_files(config, config_files)
+
+# apply config from command line
+for key, value in command_line_options.items():
+    if key == "user_volumes":
+        config['user_volumes'] = config['user_volumes'] + value
+    elif key == "command_env":
+        config['command_env'].update(value)
     else:
-        break
+        config[key] = value
+
+# update local variables (FIXME: rewrite to avoid doing this)
+locals().update(config)
 
 if command_workdir:
     user_volumes.append(command_workdir)
@@ -245,19 +294,20 @@ if command_workdir:
 if actions:
     if "commit" in actions:
         target_image_name = get_generated_image_name(container_name)
-        if not quiet:
-            print(f">> Committing container: {container_name} to image: {target_image_name}")
+        log("Committing container: {} to image: {}", container_name, target_image_name)
         docker_commit(container_name, target_image_name)
 
+    if "restart" in actions:
+        log("Restarting container: {}", container_name)
+        docker_restart(container_name)
+
     if "rm" in actions:
-        if not quiet:
-            print(f">> Removing container: {container_name}")
+        log("Removing container: {}", container_name)
         docker_rm(container_name)
 
     if "rmi" in actions:
         target_image_name = get_generated_image_name(container_name)
-        if not quiet:
-            print(f">> Removing image: {target_image_name}")
+        log("Removing image: {}", target_image_name)
         docker_rmi(target_image_name)
 
     if not command:
@@ -278,39 +328,45 @@ except Exception:
             image_name = get_generated_image_name(container_name)
             try:
                 docker_inspect(image_name)
-                if not quiet:
-                    print(f">> Using default otherworld image {image_name}")
+                log("Using default otherworld image {}", image_name)
             except Exception:
-                if not quiet:
-                    print(f">> Default otherworld image {image_name} not found, falling back to {DEFAULT_IMAGE_NAME}")
+                log("Default otherworld image {} not found, falling back to {}", image_name, DEFAULT_IMAGE_NAME)
                 image_name = DEFAULT_IMAGE_NAME
 
         if pull:
             docker_pull(image_name)
 
-    if not quiet:
-        print(f">> Creating container: {container_name} (using image: {image_name})")
+    log("Creating container: {} (using image: {})", container_name, image_name)
     docker_create(
         image_name,
         container_name,
-        DOCKER_CREATE_OPTIONS + create_x11_mapping() + expand_user_volumes(user_volumes),
+        DOCKER_CREATE_OPTIONS + config.get("docker_create_options", []) + create_x11_mapping() + expand_user_volumes(user_volumes),
         BACKGROUND_COMMAND, { OTHERWORLD_LABEL: user }
     )
     container = docker_inspect(container_name)[0]
 
 if not container["State"]["Running"]:
-    if not quiet:
-        print(f">> Starting container: {container_name}")
+    log("Starting container: {}", container_name)
     docker_start(container_name)
     container = docker_inspect(container_name)[0]
 
 try:
     docker_get_user(container_name, user)
 except Exception:
-    if not quiet:
-        print(f">> Creating container user: {user}")
+    log("Creating container user: {}", user)
     docker_create_user(container_name, user, uid)
 
-if not quiet:
-    print(f">> Welcome to {container_name} (IP {container['NetworkSettings']['IPAddress']})")
-docker_exec(container_name, command, command_user, command_env, command_workdir)
+    if config['root_init_command']:
+        config['root_init_commands'].append(config['root_init_command'])
+        
+    for command in config['root_init_commands']:
+        docker_exec(container_name, init_command_as_list(command), "root", command_env, tty, "/home/{}".format(command_user))
+
+    if config['user_init_command']:
+        config['user_init_commands'].append(config['user_init_command'])
+
+    for command in config['user_init_commands']:
+        docker_exec(container_name, init_command_as_list(command), command_user, command_env, tty, "/home/{}".format(command_user))
+
+log("Welcome to {} (IP {})", container_name, container['NetworkSettings']['IPAddress'])
+docker_exec(container_name, command, command_user, command_env, tty, command_workdir)