Schedule periodic Travis cron jobs on YARP's devel branch

[PeterBowman]

Following the lines of this comment at roboticslab-uc3m/teo-main#8, and also with #7 (latest-YARP policy) and #16 (YARP deprecations striking out of nowhere) in mind, it might be worth running periodic builds for each repo - say, once a week? - that would fetch YARP's devel branch to keep up with any breaking changes being prepared for the next release. The reasoning behind this is simple: use Travis' mechanisms to warn us against upcoming trouble even if nobody is keeping an eye on YARP's development progress. Such issues will surely arise at stale projects (like asibot-main was until quite recently).

One may use the TRAVIS_EVENT_TYPE default environment variable to differentiate between the usual push jobs and the cron ones.

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List of repos on which cron builds have been enabled (roboticslab-uc3m at travis-ci.org):

• kinematics-dynamics
• openrave-yarp-plugins
• yarp-devices (see also Run Travis CI scripts on specific versions of CMake, YARP, etc. yarp-devices#111) BREAKS ON PRECISE
• asibot-hmi
• tools
• vision
• speech

[jgvictores]

Sounds like a great idea!

For teo-main I activated a daily job on master via web. I understand this can be done via .travis? Could you insert the magic lines on any .travis so it's just copy+paste for me on the rest of the repos?

[PeterBowman]

@jgvictores done at roboticslab-uc3m/kinematics-dynamics@4362843 and scheduled to run weekly on local develop branch. Please take a look at roboticslab-uc3m/kinematics-dynamics@677eeab, too.

[PeterBowman]

YARP's devel already requires CMake +3.0, thus builds for yarp-devices are currently erroring. Pulling packages from ppa:kalakris/cmake is not an option since it stalled at 2.8.11. Looks like we need either to:

• compile CMake ourselves and, preferably, store it in Travis' cache, or
• upgrade CI builds to Trusty (but: Run Travis CI scripts on specific versions of CMake, YARP, etc. yarp-devices#111)

I'd like to remark that we no longer need to add a sudo apt-get install cmake and, in spite of what official packages indicate, the default CMake version installed is 3.2.2 at the time of writing. Proof at https://travis-ci.org/roboticslab-uc3m/kinematics-dynamics/jobs/234523759 (L277), (L307).

[PeterBowman]

I deem this done, all repos listed in the issue's description have been enabled but:

• follow-me and xgnitive: I'm not touching these
• teo-main (same goes for asibot-main once CI builds will be enabled): already built against latest YARP master on a daily basis, while YARP devel is tested by each of its sub-repos
• yarp-devices: let's analyze this case at problems with the inizialitation of jr3 devices yarp-devices#117 and Try hc-driver-4.9 yarp-devices#118