[bugfix] Change to working directory before merging job array files

[teojgo]

• Add logging info when an array job is detected and during file merging.

Related to #840
Fixes #839

[bcfriesen]

Hi @teojgo,

thanks for working on this - unfortunately it still does not work for me. I noticed that the directory from which I invoke ReFrame to run the job arrays test now has a .out and .err file, but both are blank. The .out_0 and .out_1 and .err_0 and .err_1 files are all still in the stage dir.

[teojgo]

@bcfriesen this is strange. Can you post the log lines mentioning the merging of files?

[bcfriesen]

Hi @teojgo,

hmm, I see no logs discussing merging files. I am running on commit cdd4501 and using reframe -v. Should I be doing something else?

[teojgo]

Hello @bcfriesen,

Please checkout to the branch of this PR and run again. Then the reframe.log should contain information regarding the merging of files.

[bcfriesen]

Hi @teojgo,

ahh now it all works. Sorry I think I was one commit behind this PR. Everything works now - the merging message is in the log, and the job arrays test passes. Thanks!

[teojgo]

@bcfriesen thank you for the feedback. We are going to review now and merge the PR.

[vkarak]

lgtm

[vkarak]

@jenkins-cscs retry all