Syntax error in postinstall script

[Anton]

Installation output:

Reading package lists... Done
Building dependency tree
Reading state information... Done
Suggested packages:
  python3-uwsgidecorators
The following NEW packages will be installed:
  uwsgi-plugin-python3
0 upgraded, 1 newly installed, 0 to remove and 11 not upgraded.
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After this operation, 259 kB of additional disk space will be used.
Get:1 http://mirror.yandex.ru/ubuntu xenial/universe amd64 uwsgi-plugin-python3 amd64 2.0.12-5ubuntu3 [73.7 kB]
Fetched 73.7 kB in 0s (1,196 kB/s)
Selecting previously unselected package uwsgi-plugin-python3.
(Reading database ... 62209 files and directories currently installed.)
Preparing to unpack .../uwsgi-plugin-python3_2.0.12-5ubuntu3_amd64.deb ...
Unpacking uwsgi-plugin-python3 (2.0.12-5ubuntu3) ...
Processing triggers for man-db (2.7.5-1) ...
Setting up uwsgi-plugin-python3 (2.0.12-5ubuntu3) ...
/var/lib/dpkg/info/uwsgi-plugin-python3.postinst: line 61: [: : integer expression expected

File content:
/var/lib/dpkg/info/uwsgi-plugin-python3.postinst[57:61]

      BINARY_IS_UWSGI_ALTERNATIVE="$(\
        update-alternatives --list uwsgi 2>/dev/null \
        | grep -c '/uwsgi_python3$' | true \
      )"
      if [ "$BINARY_IS_UWSGI_ALTERNATIVE" -eq 0 ]; then

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Walter (wdoekes)]

That should be `; true` or ` || true`, but not ` | true`.

Reproduced on Xenial machine where I first installed uwsgi and then uwsgi-plugin-python3 2.0.12-5ubuntu3.

[Walter (wdoekes)]

I see it has been fixed in later versions (e.g. on Zesty):

uwsgi-2.0.14+20170111/debian$ grep BINARY_IS_UWSGI_ALTERNATIVE= -A3 uwsgi-plugin-__PLUGIN__.postinst.in*
uwsgi-plugin-__PLUGIN__.postinst.in.pri: BINARY_IS_UWSGI_ALTERNATIVE="$(\
uwsgi-plugin-__PLUGIN__.postinst.in.pri- update-alternatives --list uwsgi 2>/dev/null \
uwsgi-plugin-__PLUGIN__.postinst.in.pri- | grep -c '/uwsgi_@@plugin_alternatives_stem@@$' || true \
uwsgi-plugin-__PLUGIN__.postinst.in.pri- )"
--
uwsgi-plugin-__PLUGIN__.postinst.in.pri-py: BINARY_IS_UWSGI_ALTERNATIVE="$(\
uwsgi-plugin-__PLUGIN__.postinst.in.pri-py- update-alternatives --list uwsgi 2>/dev/null \
uwsgi-plugin-__PLUGIN__.postinst.in.pri-py- | grep -c '/uwsgi_@@plugin_alternatives_stem@@$' || true \
uwsgi-plugin-__PLUGIN__.postinst.in.pri-py- )"

[Adrien Beau (adrienbeau)]

Came here to report this very bug, which I encountered when upgrading to 2.0.12-5ubuntu3.1.