[Pkg-emacsen-addons] Bug#905464: dh-elpa: Expects .el file name to be based on package name (and does not consider "${pkg}-mode.el")

[Axel Beckert]

Package: dh-elpa
Version: 1.13

Hi,

when trying to switch the package tpp (which also ships "tpp-mode.el" to
edit tpp files), dh_elpa expects a file named
debian/.debhelper/elpa/tpp.desc despite debian/elpa lists
"contrib/tpp-mode.el".

The content of the debian/elpa file seems to be ignored when calculating
the path to the .desc file.

Error message:

dh_elpa
        Using elpa package name tpp
        emacs -batch -Q -l package --eval "(add-to-list 'package-directory-list \"/usr/share/emacs/site-lisp/elpa\")" --eval "(add-to-list 'package-directory-list \"/usr/share/emacs/site-lisp/elpa-src\")" -f package-initialize -l dh-elpa.el -f dhelpa-batch-install-file debian/tpp//usr/share/emacs/site-lisp/elpa-src contrib/tpp-mode.el /home/abe/tpp/tpp/debian/.debhelper/elpa 1533407657
dh_elpa: failed to open /home/abe/tpp/tpp/debian/.debhelper/elpa/tpp.desc
make[1]: *** [debian/rules:23: override_dh_elpa] Error 2

Existing file:

→ ls -l debian/.debhelper/elpa/*.desc
-rw-r--r-- 1 abe abe 54 Aug  5 02:20 debian/.debhelper/elpa/tpp-mode.desc

Since this is not primarily an emacs mode package but only ships an
emacs mode as an add-on, the package is not named elpa-tpp-mode or
tpp-mode but just tpp.

-- System Information:
Debian Release: buster/sid
  APT prefers unstable
  APT policy: (990, 'unstable'), (980, 'unstable-debug'), (600, 'testing'), (111, 'buildd-unstable'), (111, 'buildd-experimental'), (110, 'experimental'), (105, 'experimental-debug')
Architecture: amd64 (x86_64)

Kernel: Linux 4.17.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE=C.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages dh-elpa depends on:
ii  debhelper               11.3.5
ii  dh-make-perl            0.102
ii  emacs25                 1:25.2+1-8
ii  libarray-utils-perl     0.5-1
ii  libconfig-tiny-perl     2.23-1
ii  libdebian-source-perl   0.102
ii  libdpkg-perl            1.19.0.5
ii  libfile-find-rule-perl  0.34-1
ii  libtext-glob-perl       0.10-1
ii  perl                    5.26.2-6

dh-elpa recommends no packages.

dh-elpa suggests no packages.

-- no debconf information