pkg_deb is breaking Debian package policy. Only Description should be multiline.

[smu-ggl]

Description of the problem / feature request:

make_deb.py breaks multiple generated header fields into multiline fields. While this is allowed in source packages (for readability), dpkg --gencontrol reformats them into single-line entries for the binary packages.

https://www.debian.org/doc/debian-policy/ch-controlfields.html only defines the Description field as multiline. Tooling can (and some do) ignore any but the first line and/or stop processing the package.

Feature requests: what underlying problem are you trying to solve with this feature?

Ensure that generated packages adhere to Debian policy on the package format.

Bugs: what's the simplest, easiest way to reproduce this bug? Please provide a minimal example if possible.

Use a long Depends, Suggests, Provides, ... line and have it broken up into multiple lines.

What operating system are you running Bazel on?

Linux - http://storage.googleapis.com/bazel-apt/pool/jdk1.8/b/bazel/bazel_5.1.0_amd64.deb is a broken package in this regard :D

What's the output of bazel info release?

5.1.0, I'd assume, I haven't tried.

Have you found anything relevant by searching the web?

See above for Debian policy link.

Any other information, logs, or outputs that you want to share?

Example tool broken by this:
dose-debcheck from Debian testing (part of dose3 source package):

Fatal error in module dose_deb.packages:

[...]
Parser Error in Package (bazel-5.0.0,5.0.0,amd64)
Suggests : Field Suggests has a wrong value (character 57-58: character 57-58: Unexpected token : '
'.. (vpkgformula)): 'google-jdk | java8-sdk-headless | java8-jdk | java8-sdk |
oracle-java8-installer, bash-completion'

[aiuto]

This is fixed here by #573 and the 0.7.0 release.
bazelbuild/bazel#15201 addresses updating Bazel