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# -*- mode: org; -*-

#+STARTUP: showall

For jessie, GDB uses Python 3 by default.

* Users

  For the time being, you may switch back to Python 2 by installing
  gdb-python2.  The gdb-python2 package is likely to be dropped before
  <jessie+1>, assuming we don't hit any really serious problems.

  Please report bugs for any problems we might care about, whether in
  or out of Debian, so we can track the impact and assist in dealing
  with any issues.  (Include "python" in the subject.)

  - If the problem is with a script from a package that's in Debian
    (even if the Debian package does not install that script) please
    report a bug against the package and [X-Debbugs-]CC us:

    + Run "reportbug --list-cc=gdb@packages.debian.org
      <package-or-file>" and follow the prompts.

  - If the problem is with scripts from packages that aren't in Debian
    but are in free software, report a bug against gdb:

    + Run "reportbug gdb" and follow the prompts.

    + Tell us (1) where to get the software and (2) how to get in
      touch with upstream (preferably in the form of a link to a
      report about it in the upstream bugtracker).

      If the project doesn't welcome contributions, please let us know
      so we don't waste time writing patches.

    We don't *promise* to fix such problems, but we still want to know
    about them, and we're likely to take a stab at them if it doesn't
    take too long to get from initiating a VCS checkout to having the
    software built.

  - If the problem is with private scripts but you think it's because
    of a deficiency in GDB, please construct a minimal example of the
    issue and report that to us, too:

    + Run "reportbug gdb" and follow the prompts.
    + Include your example in the email.
    + Links to any relevant bug reports/discussion are appreciated (as
      always).

* Packagers

  - Packages will be considered *buggy* if their GDB scripts do not
    work with *both* Python 2 *and* Python 3.

    + This is partly so that things will work for users of both gdb and
      gdb-python2, and partly because it is the only sane way to do
      things upstream: GDB can only be built with one version of Python
      at a time, and not all distributions, users, etc. have/are/will
      switch(ed/ing/) at the same time (or even in the same direction).

  - Packages will be considered *RC buggy* if they conflict with,
    break, or depend on either gdb or gdb-python2 just because of such
    broken scripts.

    + It is, after all, better to have scripts that don't work than to
      be unable to even install the package it is in.  Also, users
      could have other builds of GDB around to use such scripts with.

  The "six" module may be useful for reference/inspiration here:
    <https://pythonhosted.org/six/>
  as might these pages:
    <https://wiki.python.org/moin/Python3.0>
    <http://docs.pythonsprints.com/python3_porting/py-porting.html>

  If you would like us to make each gdb package pull in the
  appropriate "six" package, we would be happy to do that; just file a
  bug and/or prod SamB on IRC.

  - The motivation being to prevent lib or -dbg packages (wherever you
    ship you scripts) needing to either reinvent pieces of the "six"
    package or pull in python-six *and* python3-six (thus keeping both
    versions of python installed) when the user may not even have or
    want to use gdb: there *are* other uses for -dbg packages, and
    some scripts are shipped in lib packages anyway.

  - However, this probably won't be too helpful from an upstream PoV
    unless we can get this to happen on other distros as well.