lintr-bot does not seem to respect `.lintr` file

[javierluraschi]

See https://github.com/rstudio/mlflow/blob/master/R/mlflow/.lintr changing to line-width to 120 but comments in PR point to 80:

https://github.com/rstudio/mlflow/pull/43

[alexeckert]

I'm experiencing the same problem. The rules defined in a .lintr file will be respected when calling lint_package from RStudio or when calling it locally using Rscript -e "lintr::lint_package()". In travis however all rules are used and .lintr won't be used.

[strboul]

I also experience the same problem.

[russHyde]

@javierluraschi I noted that you are using a testthat linting test. Could you confirm if you get the same problem if you remove the testthat call to linting and add an after_success call to Rscript -e 'lintr::lint_package()' as described here https://github.com/jimhester/lintr#non-failing-lints

[jimhester]

I think this is a problem with the working directory when the tests are run, I think I would recommend not using lintr from within your tests.