feat: 🎸 add check command

✅ Closes: #5

README.md

@@ -30,6 +30,7 @@ Options:
   -h, --help  Show this message and exit.
 
 Commands:
+  check     Check to see if it can be encrypted
   decrypt   Decrypt encrypted pye file
   encrypt   Encrypt your python code
   generate  Generate loader file using specified key
@@ -73,6 +74,17 @@ Options:
   -h, --help      Show this message and exit.
 ```
 
+### Check
+```shell
+~$ pyencrypt check -h
+Usage: cli.py check [OPTIONS] ENTRY
+
+  Check to see if it can be encrypted
+
+Options:
+  -h, --help  Show this message and exit.
+```
+
 ## Example
 ### Encrypt
 ```shell

pyencrypt/check.py

@@ -0,0 +1,25 @@
+from importlib import abc
+from importlib.machinery import ModuleSpec
+from typing import Sequence, Union
+import types
+from importlib._bootstrap_external import _NamespacePath
+from pathlib import Path
+import os
+
+_Path = Union[bytes, str]
+
+
+class CheckFinder(abc.MetaPathFinder):
+    def find_spec(self, fullname: str, path: Sequence[_Path],
+                  target: types.ModuleType=None) -> ModuleSpec:
+        if path:
+            if isinstance(path, _NamespacePath):
+                file_path = Path(
+                    path._path[0]) / f'{fullname.rsplit(".",1)[-1]}.py'
+            else:
+                file_path = Path(path[0]) / f'{fullname.rsplit(".",1)[-1]}.py'
+        else:
+            file_path = f'{fullname}.py'
+        if not os.path.exists(file_path):
+            return None
+        return None

pyencrypt/cli.py

@@ -166,5 +166,16 @@ def generate_loader(ctx, key):
     click.echo(FINISH_GENERATE_MSG)
 
 
+@cli.command(name='check')
+@click.argument('entry', type=click.Path(exists=True))
+@click.help_option('-h', '--help')
+def check(entry):
+    """Check to see if it can be encrypted"""
+    sys.path.insert(0,os.getcwd())
+    sys.meta_path.insert(0,CheckFinder())
+    entry = Path(entry).as_posix().rstrip('.py').replace('/','.')
+    __import__(entry)
+
+
 if __name__ == '__main__':
     cli()