[virt-tools-list] [PATCH virtio-win-pkg-scripts v3 0/2] helpers to standardize driver directory layout

[Roman Kagan]

As was discussed some time ago on libguestfs ML
(http://thread.gmane.org/gmane.comp.emulators.guestfs/8341/focus=8576)
there is a need in a tool that would lay out the Windows guest drivers
on a filesystem by Windows flavor and architecture in a way that is

- easy to consume by both humans and programs
- dependable in the long term

This patch series brings in the scripts to do this.

The scripts are based on the idea that the most actual information about
the suitability of a driver for a particular flavor / architecture is
contained in the driver's catalog file (in particular, the process of
ISV or WHQL siging may affect it).

Since the catalog files are DER-encoded ASN.1 structures the first patch
introduces a module to extract relevant information from a .cat file
using PyASN1 library.

The second patch introduces a script that lays out the drivers by
arch/flavor.
It assumes that

- every driver for a particular arch/flavor is contained in a separate
  directory

- the directory contains a single .inf file; the basename of the file is
  taken as the name of the package

- the .cat file for the package is in the same directory and has the
  same basename as the .inf

- all the files contained in that directory are associated with the
  driver and go together with it no matter if they are listed in the
  .inf or in the .cat or not.

The virtio-win driver packages I could get my hands on all matched the
above assumptions.

Besides, as there occasionally are multiple packages that match a
particular flavor / arch, the one with the most recent timestamp (taken
as the signing time if present or the catalog creation time otherwise)
takes over.

[ Integration with the rest of the system is still pending ]

Roman Kagan (2):
  add parser for driver catalog files
  add script to lay out drivers based on their catalog files

---
changes since v2:
 - add extracting of catalog timestamp and signing time
 - compare the timestamps to decide if the package is to replace the
   already copied one (the most recent wins)
 - minor refactoring for better readability

changes since v1:
 - fix pep8 warnings except for the OS table alignment
 - add debugging print of what driver package is being processed
 - switch to argparse
 - facilitate using as a module

 util/cpdrivers.py | 238 ++++++++++++++++++++++++++++++++++++++++++++
 util/parsecat.py  | 290 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 528 insertions(+)
 create mode 100644 util/cpdrivers.py
 create mode 100644 util/parsecat.py

-- 
2.5.0