Check that no GPL licence inside code

[OPpuolitaival]

Description

Check that there is not GPL licence text in pull request

Pull request type

[x] Fix
[ ] Refactor
[ ] New target
[ ] Feature
[ ] Breaking change

[SeppoTakalo]

You will most probably need to use case insensitive search.

[OPpuolitaival]

@SeppoTakalo good point! Now fixed.

[cmonr]

This test case should be failing since GPL code is currently in the repo.

[cmonr]

@OPpuolitaival I like how quickly this PR came in from when the issue was discovered.

However, as this is right now, the test case will either never fail or always fail. git grep (and grep) don't change their error codes if they don't find matches. If you're looking to use either of these commands, you need to check if the command generated any output, and force and error code as appropriate.

This is a quick example of what I mean: cmonr@54e11e2
And this is the result it produces: https://travis-ci.org/cmonr/mbed-os/jobs/376894645

The second issue is that because this test will fail until the GPL code is removed, it will need to be rebased once a PR is introduced and merged in to remove the offending code. This second issue is more of an FYI.

[SeppoTakalo]

@cmonr Actually, GREP return code reflects to findings.

From man page:

EXIT STATUS
     The grep utility exits with one of the following values:

     0     One or more lines were selected.
     1     No lines were selected.
     >1    An error occurred.

Git grep --help

-q
--quiet
Do not output matched lines; instead, exit with status 0 when there is a match and with non-zero status when there isn’t.

So we could use either git grep -q or grep >/dev/null and ignore the lines found.

[OPpuolitaival]

I tested and return code is same without -q but now changed to use -q option

[cmonr]

Re-opening because this is still an issue.

CC: @ARMmbed/mbed-os-maintainers @ChiefBureaucraticOfficer

[SeppoTakalo]

Current master should not anymore contain GPL code so this test should pass.
Please rebase and try out. If it works, merge in, so mistakes are not going to happen anymore.

[OPpuolitaival]

rebased

[cmonr]

LGTM! Good to know about the -q flag.

[cmonr]

/morph build

[mbed-ci]

Build : SUCCESS

Build number : 2213
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/6848/

Triggering tests

/morph test
/morph uvisor-test
/morph export-build
/morph mbed2-build

[mbed-ci]

Test : SUCCESS

Build number : 2006
Test logs :http://mbed-os-logs.s3-website-us-west-1.amazonaws.com/?prefix=logs/6848/2006

[mbed-ci]

Exporter Build : SUCCESS

Build number : 1850
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/exporter/6848/