Bug#832053: devscripts: deblog command to display current and former build logs

[Raphaël Hertzog]

Package: devscripts
Version: 2.16.6
Severity: wishlist

I find myself often typing:
$ less ../build-area/ftplib_4.0-1-1_amd64.build
or
$ less ../build-area/ftplib_4.0-1-1_amd64-20160721-1340.build
(usually playing with tab completion to find an older build log)

I would like to have a "deblog" command (similar to "debc" or "debi") that
would by default identify the location of the last build log and show
it in a pager. It should respect DEBRELEASE_DEBS_DIR to find logs next to
the built packages.

Possible options:

$ deblog --with vim
=> to run with something else than a pager

$ deblog --older 2
=> to display the 2nd build log (when you coun starting from the latest towards
   the oldest)

$ deblog --select
=> to show a list of the available build logs and let me pick the one to
   open

Note that the build logs above are generated by sbuild but at least
debuild generates a build log following the same convention (though it
does not have historical logs AFAIK).

-- Package-specific info:

--- /etc/devscripts.conf ---

--- ~/.devscripts ---
DEBRELEASE_UPLOADER=dput
DEBRELEASE_DEBS_DIR=../build-area
DEBCHANGE_RELEASE_HEURISTIC=changelog
DEBCHANGE_MULTIMAINT_MERGE=yes
DEBCHANGE_PRESERVE=yes
DEBUILD_LINTIAN_OPTS="--color always -I"
DEBSIGN_KEYID=0xF2AC729A
DEBSIGN_PROGRAM=gpg2
DEBCHANGE_AUTO_NMU=no

-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable'), (500, 'oldstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.6.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=fr_FR.utf8, LC_CTYPE=fr_FR.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages devscripts depends on:
ii  dpkg-dev     1.18.9
ii  libc6        2.23-1
ii  perl         5.22.2-2
pn  python3:any  <none>

Versions of packages devscripts recommends:
ii  apt                         1.3~pre2
ii  at                          3.1.20-1
ii  curl                        7.47.0-1
ii  dctrl-tools                 2.24-2
ii  debian-keyring              2016.07.02
ii  dput-ng [dput]              1.10
ii  equivs                      2.0.9+nmu1
ii  fakeroot                    1.21-1
ii  file                        1:5.28-2
ii  gnupg                       1.4.20-6
ii  gnupg2                      2.1.11-7
ii  libdistro-info-perl         0.14
ii  libencode-locale-perl       1.05-1
ii  liblwp-protocol-https-perl  6.06-2
ii  libsoap-lite-perl           1.20-1
ii  liburi-perl                 1.71-1
ii  libwww-perl                 6.15-1
ii  licensecheck                3.0.1-1
ii  lintian                     2.5.45
ii  man-db                      2.7.5-1
ii  patch                       2.7.5-1
ii  patchutils                  0.3.4-1
ii  python3-debian              0.1.28
ii  python3-magic               1:5.28-2
ii  sensible-utils              0.0.9
ii  strace                      4.12-3
ii  unzip                       6.0-20
ii  wdiff                       1.2.2-1+b1
ii  wget                        1.18-2
ii  xz-utils                    5.1.1alpha+20120614-2.1

Versions of packages devscripts suggests:
ii  bsd-mailx [mailx]            8.1.2-0.20160123cvs-3
ii  build-essential              12.2
pn  cvs-buildpackage             <none>
pn  devscripts-el                <none>
pn  diffoscope                   <none>
pn  dose-extra                   <none>
pn  gnuplot                      <none>
ii  gpgv                         1.4.20-6
ii  libauthen-sasl-perl          2.1600-1
ii  libfile-desktopentry-perl    0.22-1
ii  libnet-smtp-ssl-perl         1.03-1
pn  libterm-size-perl            <none>
ii  libtimedate-perl             2.3000-2
pn  libyaml-syck-perl            <none>
pn  mozilla-devscripts           <none>
ii  mutt                         1.6.0-1
ii  openssh-client [ssh-client]  1:7.2p2-5
ii  svn-buildpackage             0.8.5+nmu1
ii  w3m                          0.5.3-28

-- no debconf information