Add Dockerfile for running test

[PeterSurda]

• run ./run-tests-in-docker.sh to run travis tests locally

[g1itch]

I'm checking the ./run-tests-in-docker.sh. I hope it downloads less than 6 Gb (: Did you try to do RUN apt-get update once, e.g.:

FROM ubuntu:bionic AS pybm-travis-bionic
ENV DEBIAN_FRONTEND noninteractive
RUN add-apt-repository ppa:deadsnakes/ppa
RUN apt-get update

[g1itch]

Also I'm not sure about python-pycryptopp, where it's used.

[PeterSurda]

I'll test the changes you asked about.

[g1itch]

apt-get seems to install an old python-psutil: https://buildbot.bitmessage.org/#/builders/22/builds/6/steps/7/logs/stdio

[g1itch]

Maybe use useradd, not adduser? It produces this:

Copying files from `/etc/skel' ...
Enter new UNIX password: Retype new UNIX password: passwd: Authentication token manipulation error
passwd: password unchanged
Use of uninitialized value $answer in chop at /usr/sbin/adduser line 591.
Use of uninitialized value $answer in pattern match (m//) at /usr/sbin/adduser line 592.
Try again? [y/N] Changing the user information for builder
Enter the new value, or press ENTER for the default
	Full Name []: 	Room Number []: 	Work Phone []: 	Home Phone []: Other []: Use of uninitialized value $answer in chop at /usr/sbin/adduser line 621.
Use of uninitialized value $answer in pattern match (m//) at /usr/sbin/adduser line 622.
Is the information correct? [Y/n]

[g1itch]

Strange. man chown says chown [OPTION]... [OWNER][:[GROUP]] FILE...

[PeterSurda]

I think OWNER.GROUP is a GNU non-POSIX feature, maybe it doesn't work on BSD, I've been using it on linux since the '90s. But I can change it, no big deal.

[g1itch]

Another apt update ): https://git.bitmessage.org/Bitmessage/buildbot-scripts/src/branch/master/travis2bash.sh#L69

[g1itch]

It works!

[PeterSurda]

I can add some conditional for skipping redundancies, I can't just remove them because in some jobs / situations they are needed, the same travis2bash.sh script is used in VMs, in docker, inside and outside of buildbot, and the environments differ.

[PeterSurda]

• only one apt update in total now
• use POSIX arguments for chown
• only call apt install once twice inside Dockerfile.travis
• use useradd instead of adduser
• remove python-pycryptopp