Add prototype of compiler

Author: khiemdoan

.editorconfig

@@ -0,0 +1,9 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_style = space
+indent_size = 4
+insert_final_newline = true
+trim_trailing_whitespace = true

README.md

@@ -1,2 +1,24 @@
-# python-compiler
+# Python Compiler
+
 Just simply compile *.py to *.pyc
+
+## Usage
+
+```bash
+python compiler.py main.py
+```
+
+```bash
+python compiler.py program_directory
+```
+
+Using `-h` flag to show more detail about arguments
+
+## Using file after compiling
+
+Using `pyc` file instead of `py` file.
+Example: After compile `hello.py` to `hello.pyc`, we using this command to run the script.
+
+```bash
+python hello.pyc
+```

compiler.py

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+
+from pathlib import Path
+import os
+import py_compile
+
+
+def compile_file(source_file: Path, delete=False) -> bool:
+    target_file = str(source_file) + 'c'
+    try:
+        ok = py_compile.compile(source_file, target_file)
+        if delete:
+            source_file.unlink()
+    except py_compile.PyCompileError as err:
+        print(f'*** Error compiling {source_file}...')
+        # escape non-printable characters in msg
+        encoding = sys.stdout.encoding or sys.getdefaultencoding()
+        msg = err.msg.encode(encoding, errors='backslashreplace').decode(encoding)
+        print(msg)
+        return False
+    except (SyntaxError, UnicodeError, OSError) as e:
+        print(f'*** Error compiling {source_file}...')
+        print(e.__class__.__name__ + ':', e)
+        return False
+    else:
+        return ok != 0
+
+
+
+def main():
+    import argparse
+    """Script main program."""
+
+    parser = argparse.ArgumentParser(description='Utilities to compile *.py to *.pyc.')
+    parser.add_argument('-d', '--delete', action='store_true', dest='delete', default=False, help='delete source files')
+    parser.add_argument('compile_dests', metavar='FILE|DIR', nargs='*', help='file or directory names to compile')
+
+    args = parser.parse_args()
+
+    source_files = []
+
+    for dest in args.compile_dests:
+        dest = Path(dest)
+        if dest.is_file():
+            source_files.append(dest)
+        if dest.is_dir():
+            source_files += list(dest.glob('**/*.py'))
+
+    for file in source_files:
+        compile_file(file, delete=args.delete)
+
+    return True
+
+
+if __name__ == '__main__':
+    import sys
+    exit_status = int(not main())
+    sys.exit(exit_status)