__init__.py handling proper checks

updated .gitignore too

.gitignore

@@ -26,4 +26,4 @@ screenlog*
 # and we DEFINITELY don't need these.
 __pycache__/
 *.pyc
-bdisk/test.py
+test.py

TODO

@@ -0,0 +1,14 @@
+- write classes/functions
+- support XML and legacy build.ini (warn to STDERR for build.ini)
+
+
+BUGS.SQUARE-R00T.NET bugs/tasks:
+#7:  Ensure conditional deps/imports for features only if used.
+     Is this setup.py-compatible?
+#14: Use os.path.join() for more consistency/pythonicness
+#24: Run as regular user? (pychroot? fakeroot?)
+#34: Build-time support for only building single phase of build
+#36: Allow parsing pkg lists with inline comments
+#39: Fix UEFI
+#40: ISO overlay (to add e.g. memtest86+ to final ISO)
+#43: Support resuming partial tarball downloads (Accet-Ranges: bytes)

bdisk/__init__.py

@@ -0,0 +1,27 @@
+import os
+import platform
+import sys
+
+
+# BDisk is only supported on Python 3.4 and up.
+if sys.version_info.major != 3:
+    raise RuntimeError('BDisk is only supported on Python 3')
+elif sys.version_info.minor <= 3:
+    raise RuntimeError('BDisk is only supported on Python 3.4 and up')
+
+# BDisk is only supported on GNU/Linux. There *might* be a way to make it work
+# with certain *BSDs, but if that's possible at all it'll have to come at a
+# later date. Patches welcome.
+# I'd have to find out how to manipulate/create FAT filesystems and such as
+# well.
+# I'd be curious to see if I can get it working in Cygwin or WSL:
+# https://docs.microsoft.com/en-us/windows/wsl/install-win10
+# And maybe, if we're really pie-in-the-sky, macOS's Fink/Homebrew/Macports.
+if platform.system() != 'Linux':
+    raise RuntimeError('BDisk is currently only supported on GNU/Linux')
+
+# CURRENTLY, we require root user because of the chroots and such. However,
+# there should be creative ways to do this with cgroups as a regular user in
+# the future. Patches welcome (or at least some input).
+if os.geteuid() != 0:
+    raise PermissionError('BDisk currently requires root privileges')

bdisk/main.py

@@ -0,0 +1,4 @@
+#!/usr/bin/env python3.6
+
+def main():
+    pass