Re: [PATCH v1] Travis: also test on 32-bit Linux

[Lars Schneider <larsxschneider@gmail.com>]

> On 02 Mar 2017, at 12:24, Johannes Schindelin <Johannes.Schindelin@gmx.de> wrote:
> 
> Hi Lars,
> 
> On Thu, 2 Mar 2017, Lars Schneider wrote:
> 
>> The patch looks good to me in general but I want to propose the following
>> changes:
> 
> I know you are using your script to generate this mail, but I would have
> liked to see v2 in the subject ;-)

Yeah, sorry. I already had a "D'oh" moment *after* I saw the email in 
my email client. Now I am wondering... is the next version v2 or v3 :D


>> (1) Move all the docker magic into a dedicated file
>> "ci/run-linux-32-build.sh" This way people should be able to run this
>> build on their local machines without TravisCI. However, I haven't
>> tested this.
> 
> I considered this, but there is serious overlap: the `docker pull` call
> and the `docker run` call *have* to refer to the same image. It's very
> easy for them to get out of sync if you have that information in two
> files. Maybe make that an option of the script, defaulting to
> daald/ubuntu32:xenial?

Right. I missed that. How about something like that?

      before_install:
        - ci/run-linux32-build.sh --pull-container
      before_script:
      script: ci/run-linux32-build.sh


> BTW speaking of Docker: it would be nicer if there was a Docker image that
> already had the build-essentials installed, to save on startup time. But I
> did not find any that was reasonably up-to-date.

True. But installing everything just takes a minute and we don't need to
maintain anything...


>> +set -e
> 
> Is this really necessary? I really like to avoid `set -e`, in particular
> when we do pretty much everything in && chains anyway.

Agreed, not really necessary here as we just invoke one command.
Out of curiosity: Why do you try to avoid it? I set it by default in all 
my scripts.


>> +APT_INSTALL="apt update >/dev/null && apt install -y build-essential "\
>> +"libcurl4-openssl-dev libssl-dev libexpat-dev gettext python >/dev/null"
>> +
>> +TEST_GIT_ENV="DEFAULT_TEST_TARGET=$DEFAULT_TEST_TARGET "\
>> +"GIT_PROVE_OPTS=\"$GIT_PROVE_OPTS\" "\
>> +"GIT_TEST_OPTS=\"$GIT_TEST_OPTS\" "\
>> +"GIT_TEST_CLONE_2GB=$GIT_TEST_CLONE_2GB"
>> +
>> +TEST_GIT_CMD="linux32 --32bit i386 sh -c '"\
>> +"'$APT_INSTALL && cd /usr/src/git && $TEST_GIT_ENV make -j2 test'"
>> +
>> +sudo docker run \
>> +    --interactive --volume "${PWD}:/usr/src/git" \
>> +    daald/ubuntu32:xenial /bin/bash -c "$TEST_GIT_CMD"
> 
> Hmm. Since it is a script now, it would be more readable this way, I
> think:
> 
> sudo docker run --volume "${PWD}:/usr/src/git" "${1:-daald/ubuntu32:xenial}" \
> linux32 --32bit i386 sh -c '
> 	: update packages first &&
> 	apt update >/dev/null &&
> 	apt install -y build-essential libcurl4-openssl-dev libssl-dev \
> 		libexpat-dev gettext python >/dev/null &&
> 
> 	: now build and test &&
> 	cd /usr/src/git &&
> 	DEFAULT_TEST_TARGET='"$DEFAULT_TEST_TARGET"' \
> 	GIT_PROVE_OPTS='"$GIT_PROVE_OPTS"' \
> 	GIT_TEST_OPTS='"$GIT_TEST_OPTS"' \
> 	GIT_TEST_CLONE_2GB='"$GIT_TEST_CLONE_2GB"' \
> 	make -j2 test
> '

That looks better! I'll try it!

- Lars