[Pkg-bazaar-maint] Bug#728063: bzr-builddeb: fails to get upstream version string via uscan “dversionmangle”

[Ben Finney]

Package: bzr-builddeb
Version: 2.8.7
Severity: normal

Howdy,

I've recently switched a package from using the pristine upstream tarball,
to requiring a re-pack of the tarball.

This means the version string specified in ‘debian/changelog’ needs to be
parsed by ‘uscan(1)’, via the ‘debian/watch’ option “dversionmangle”
<URL:http://manpages.debian.net/cgi-bin/man.cgi?sektion=1&query=uscan>.

For example, the Debian version string “3.7+dfsg.2-2” is taken as the
upstream version string “3.7+dfsg.2”, but this needs to be further altered
via the “dversionmangle” option to give the pristine upstream version
string “3.7”.

But this change has caused ‘bzr builddeb --source’ to fail because it is
not getting the correct version string for the pristine upstream tarball:

=====
$ bzr builddeb --source --merge
Building using working tree
Building package in merge mode
Looking for a way to retrieve the upstream tarball
Using apt to look for the upstream tarball.
apt could not find the needed tarball.
Trying to use get-packaged-orig-source to retrieve needed tarball.
make: *** No rule to make target `get-packaged-orig-source'.  Stop.
Trying to run get-packaged-orig-source rule failed
Trying to use get-orig-source to retrieve needed tarball (deprecated).
make: *** No rule to make target `get-orig-source'.  Stop.
Trying to run get-orig-source rule failed
Using uscan to look for the upstream tarball.
uscan warning: In /tmp/tmp2J8DJz no matching hrefs for version 3.7+dfsg.2 in watch line
  http://pypi.python.org/packages/source/c/coverage/coverage-(.+).tar.gz     debian debian/repack
uscan could not find the needed tarball.
bzr: ERROR: Unable to find the needed upstream tarball for package python-coverage, version 3.7+dfsg.2.
=====

The ‘builddeb’ command is mistakenly using “3.7+dfsg.2” as the pristine
upstream version string.

Whereas using ‘uscan’ directly succeeds in computing the correct upstream
version string:

=====
$ uscan --verbose --report
-- Scanning for watchfiles in .
-- Found watchfile in ./debian
-- In debian/watch, processing watchfile line:
   opts="uversionmangle=s/(\d)([a-z]\d+)$/$1~$2/,dversionmangle=s/\+dfsg\.\d+$//"     http://pypi.python.org/packages/source/c/coverage/coverage-(.+).tar.gz     debian debian/repack
[…]
Newest version on remote site is 3.7, local version is 3.7+dfsg.2
 (mangled local version number 3.7)
 => Package is up to date
-- Scan finished
=====

The ‘builddeb’ command should always get the same pristine upstream version
string as does ‘uscan’.


-- System Information:
Debian Release: jessie/sid
  APT prefers testing
  APT policy: (500, 'testing'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.10-3-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8) (ignored: LC_ALL set to en_AU.UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages bzr-builddeb depends on:
ii  bzr            2.6.0-3
ii  devscripts     2.13.4
ii  dpkg-dev       1.16.12
ii  fakeroot       1.18.4-2
ii  patchutils     0.3.2-2
ii  pristine-tar   1.28
ii  python         2.7.5-5
ii  python-apt     0.8.9.1+b1
ii  python-debian  0.1.21+nmu2
ii  quilt          0.60-10

Versions of packages bzr-builddeb recommends:
ii  libalgorithm-merge-perl  0.08-2
ii  python-distro-info       0.11
ii  python-launchpadlib      1.9.12-2

Versions of packages bzr-builddeb suggests:
ii  python-lzma  0.5.3-2+b1

-- no debconf information

-- 
 \       “Always do right. This will gratify some people, and astonish |
  `\                                            the rest.” —Mark Twain |
_o__)                                                                  |
Ben Finney <ben at benfinney.id.au>
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