1 files changed, 64 insertions, 0 deletions
diff --git a/sbdata/task.py b/sbdata/task.py
new file mode 100644
index 0000000..7011ca2
--- /dev/null
+++ b/sbdata/task.py
@@ -0,0 +1,64 @@
+import dataclasses
+import os
+import sys
+import typing
+
+import questionary
+
+_T = typing.TypeVar('_T')
+
+
+class Arguments:
+
+    def __init__(self, args: list[str]):
+        self.prog = args[0]
+        self.args: typing.Dict[str, str] = {}
+        self.flags: list[str] = []
+        self.no_prompt = os.environ.get('PROMPT') == 'NO_PROMPT'
+        self.task: typing.Optional[str]
+        self.task = None
+        last_arg = None
+        for arg in args:
+            if last_arg is None:
+                if arg.startswith('--'):
+                    last_arg = arg[2:]
+                elif arg.startswith('-'):
+                    self.flags.append(arg[1:])
+                elif arg.startswith(':'):
+                    self.task = arg[1:]
+                else:
+                    print("Unknown arg: " + arg)
+            else:
+                self.args[last_arg] = arg
+                last_arg = None
+
+    def get_value(self, label: str, value: _T, question: questionary.Question) -> _T:
+        if value is None:
+            if self.no_prompt:
+                print('No argument present for ' + label)
+                sys.exit(1)
+            return question.ask()
+        return value
+
+    def has_flag(self, param: str) -> bool:
+        return param in self.flags
+
+
+@dataclasses.dataclass
+class Task:
+    label: str
+    name: str
+    run: typing.Callable
+
+
+tasks = {}
+
+TASK_TYPE = typing.Callable[[Arguments], None]
+
+
+def register_task(label: str) -> typing.Callable[[TASK_TYPE], TASK_TYPE]:
+    def d(func: TASK_TYPE) -> TASK_TYPE:
+        tasks[func.__name__] = Task(label, func.__name__, func)
+        return func
+
+    return d