[PATCH setup 00/14] Use libsolv, solve all our problems... (WIP)

[Jon Turney <jon.turney@dronecode.org.uk>]

... solve some problems, perhaps add some new ones, I guess.  I'm not 100% 
sure this is the right approach to take, but I wrote it, so here it is.

This replaces the current PackageVersion class with a similar one which stores 
the information in a libsolv pool, and the current depsolver with the libsolv 
solver (as used by zypper, dnf and others).

Immediately, this enables:
- use of a version relation in package dependencies
- an obsoletes: relation between packages

This also makes it much easier to support:
- version numbers with an epoch component (I think just how we handle ':' in 
filenames needs auditing to make this work)
- other commonly-implemented package relations such as conflicts:, provides: 
etc.

What remains to be done:
- I've dodged a lot of the UI issues: If the solver reports problems, all that 
can be done is accept the default solution or cancel.  This possibly isn't a 
big problem until we have a package set which can contain problems...
- We had a very poor UI for showing what will actually be done (combine in 
your head the "Pending" view with packages listed in the text on the 
PrereChecker page), and this removes part of that
- As implemented, selecting "Current" overrides "Keep".  This is wrong, and a 
change from current behaviour, but is probably a symptom of some deeper 
confusion in the picker UI I'm not sure how to address

libsolv needs to be lightly patched to build for Win32, see [1].  I will ITP 
that, but it probably also needs an RPM to support cross-building.

[1] https://github.com/jon-turney/libsolv

Jon Turney (14):
  Opaque how PackageDepends is stored
  Factor out reading installed.db
  Hoist addScript() etc. up from packageversion to packagemeta
  Hoist pick() up to packagemeta
  Hoist uninstall up to Installer::uninstallOne()
  Hoist scan() up from packageversion to packagemeta
  Store package stability in class packageversion
  Change to using a libsolv pool for storing package information
  Remove cygpackage class
  Remove packageversion class
  Drop in SolvableVersion as a replacement for packageversion
  Use solver to check for problems and produce a list of package
    transactions
  Download/checksum/install/uninstall what transaction wants
  Add obsoletes: support

 IniDBBuilderPackage.cc  | 331 ++++++++---------------
 IniDBBuilderPackage.h   |  32 ++-
 Makefile.am             |   7 +-
 PackageSpecification.cc |  12 +
 PackageSpecification.h  |   7 +-
 PickPackageLine.cc      |  14 +-
 PickView.cc             |   9 +-
 bootstrap.sh            |   2 +-
 choose.cc               |   8 +-
 configure.ac            |   1 +
 cygpackage.cc           | 187 -------------
 cygpackage.h            |  88 -------
 desktop.cc              |   1 -
 download.cc             |  72 ++---
 ini.cc                  |   1 +
 inilex.ll               |   1 +
 iniparse.yy             |   3 +
 install.cc              | 176 ++++++++-----
 libsolv.cc              | 689 ++++++++++++++++++++++++++++++++++++++++++++++++
 libsolv.h               | 231 ++++++++++++++++
 package_db.cc           | 115 ++++++--
 package_db.h            |   8 +
 package_depends.cc      |  19 +-
 package_depends.h       |   2 +-
 package_meta.cc         | 294 ++++++++++++---------
 package_meta.h          |  30 ++-
 package_version.cc      | 414 -----------------------------
 package_version.h       | 190 +------------
 postinstall.cc          |   6 +-
 prereq.cc               | 206 ++++-----------
 prereq.h                |  22 +-
 res.rc                  |   4 +-
 32 files changed, 1606 insertions(+), 1576 deletions(-)
 delete mode 100644 cygpackage.cc
 delete mode 100644 cygpackage.h
 create mode 100644 libsolv.cc
 create mode 100644 libsolv.h
 delete mode 100644 package_version.cc

-- 
2.12.3