Add travis ci

[k-okada]

confirmed it passed on https://app.travis-ci.com/github/k-okada/openslam_gmapping/builds/238207518 I also checked on GithubActions, but it is failing for some reason https://github.com/k-okada/openslam_gmapping/actions/runs/1255903406 Once this gets merged, I'll check #37

cc: @clalancette @seanyen

[k-okada]

build.ros.org fails with network error??

17:58:20 Need to get 128 kB/67.6 MB of archives.
17:58:20 After this operation, 275 MB of additional disk space will be used.
17:58:20 Err:1 http://repositories.ros.org/ubuntu/testing bionic/main amd64 ros-melodic-catkin amd64 0.7.29-1bionic.20201014.191449
17:58:20   404  Not Found [IP: 10.0.1.11 80]
17:58:20 E: Failed to fetch http://repositories.ros.org/ubuntu/testing/pool/main/r/ros-melodic-catkin/ros-melodic-catkin_0.7.29-1bionic.20201014.191449_amd64.deb  404  Not Found [IP: 10.0.1.11 80]
17:58:20 E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
17:58:20 
17:58:20 Invocation failed due to the following known err

[clalancette]

build.ros.org fails with network error??

There was a network problem on the build server, and it failed to upload the packages. This has all been resolved now, so re-running the PR job (which I'll do next) should work.

[clalancette]

@ros-pull-request-builder retest this please

[ahendrix]

I've approved your request to add Travis-CI integration on this repository; hopefully that helps resolve the Travis-CI issues here.

[k-okada]

@ahendrix thank you for your help, but we still need some settings,

I think you can find 'Configure' button on the left of "Travis CI" log of this page, and configure it. x

[ahendrix]

I spent a while looking into this, and there aren't any settings on the github side which are related to authorization. It appears that Travis-Ci is either installed, or it isn't.

I tried triggering a build manually, on the melodic-devel branch, and got an error that the .travis.yml file did not exist.

I was able to trigger a build by closing and reopening this pull request, and I got the same error, "travis ci could not authorize build request for ..."

These are the current github integration settings:

I did a quick search on the TravisCi error that you're seeing, and this suggests that it's an configuration or plan issue with TravisCi: https://stackoverflow.com/questions/41034694/travis-could-not-authorize-build-request/41078031

[k-okada]

@ahendrix Thank for taking time, Yes you're right , setting free plan make start tarvic-ci. Great! t