[PATCH 3/2 xserver] travis: Enable ccache.

[Eric Anholt]

Aaron Plattner <aplattner at nvidia.com> writes:

> On 06/01/2017 01:59 PM, Eric Anholt wrote:
>> We bind-mount the cache directory into the container.  Cuts build time
>> from about 4 minutes to 2.
>> 
>> Signed-off-by: Eric Anholt <eric at anholt.net>
>> ---
>>   .travis.yml | 5 +++--
>>   1 file changed, 3 insertions(+), 2 deletions(-)
>> 
>> diff --git a/.travis.yml b/.travis.yml
>> index e10cfe1e134f..0a136b23dd80 100644
>> --- a/.travis.yml
>> +++ b/.travis.yml
>> @@ -1,4 +1,5 @@
>>   language: c
>> +cache: ccache
>>   dist: trusty
>>   services: docker
>>   
>> @@ -6,9 +7,9 @@ before_install:
>>     - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then docker pull anholt/xserver-travis ; fi
>>   
>>   before_script:
>> -  - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then echo FROM anholt/xserver-travis:v3 > Dockerfile ; fi
>> +  - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then echo FROM anholt/xserver-travis:v4 > Dockerfile ; fi
>>     - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then echo ADD . /root >> Dockerfile ; fi
>>     - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then docker build -t withgit . ; fi
>>   
>>   script:
>> -  - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then docker run withgit /bin/sh -c "cd /root && ./test/scripts/travis-test.sh" ; fi
>> +  - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then docker run --volume $HOME/.ccache:/root/.ccache withgit /bin/sh -c "cd /root && ./test/scripts/travis-test.sh" ; fi
>
> This doesn't apply cleanly because the previous patch names it 
> build-travis-deps.sh rather than travis-test.sh. But with that fixed, 
> and running the commands manually, this series seems to work.
>
> With ccache, this took a whopping 17s on my medium-speed non-SSD 
> workstation.

Yeah, I missed the commit --amend of the previous patch (we're not
building deps any more, so I renamed it).

I hadn't considered using this scripting locally, but it may be an
interesting way to go, once we have xts hooked up in meson.
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