set dist trusty for old perls

[skaji]

It seems that the default ubuntu version in travis ci has changed from trusty to xenial.
Then, because old perls for xenial are not available, travis ci is failing with current master branch.

❯ for ubuntu_version in 14.04 16.04; do for perl_version in 5.8 5.10 5.12 5.14 5.16 5.18 5.20 5.22 5.24 5.26 5.28 5.30; do printf "ubuntu_version %s, perl_version %4s, http_status %d\n" $ubuntu_version $perl_version $(curl -X HEAD -w '%{http_code}\n' -s https://storage.googleapis.com/travis-ci-language-archives/perl/binaries/ubuntu/$ubuntu_version/x86_64/perl-$perl_version.tar.bz2); done; done
ubuntu_version 14.04, perl_version  5.8, http_status 200
ubuntu_version 14.04, perl_version 5.10, http_status 200
ubuntu_version 14.04, perl_version 5.12, http_status 200
ubuntu_version 14.04, perl_version 5.14, http_status 200
ubuntu_version 14.04, perl_version 5.16, http_status 200
ubuntu_version 14.04, perl_version 5.18, http_status 200
ubuntu_version 14.04, perl_version 5.20, http_status 200
ubuntu_version 14.04, perl_version 5.22, http_status 200
ubuntu_version 14.04, perl_version 5.24, http_status 200
ubuntu_version 14.04, perl_version 5.26, http_status 200
ubuntu_version 14.04, perl_version 5.28, http_status 200
ubuntu_version 14.04, perl_version 5.30, http_status 200
ubuntu_version 16.04, perl_version  5.8, http_status 404
ubuntu_version 16.04, perl_version 5.10, http_status 404
ubuntu_version 16.04, perl_version 5.12, http_status 404
ubuntu_version 16.04, perl_version 5.14, http_status 404
ubuntu_version 16.04, perl_version 5.16, http_status 404
ubuntu_version 16.04, perl_version 5.18, http_status 404
ubuntu_version 16.04, perl_version 5.20, http_status 404
ubuntu_version 16.04, perl_version 5.22, http_status 200
ubuntu_version 16.04, perl_version 5.24, http_status 200
ubuntu_version 16.04, perl_version 5.26, http_status 200
ubuntu_version 16.04, perl_version 5.28, http_status 200
ubuntu_version 16.04, perl_version 5.30, http_status 200

Let's use dist: trusty for now.

See also https://travis-ci.community/t/failure-with-perl-5-16-5-18-5-20/2458

[coveralls]

Pull Request Test Coverage Report for Build 264

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 92.711%

---

Totals
Change from base Build 259:	0.0%
Covered Lines:	725
Relevant Lines:	782

---

💛 - Coveralls

[skaji]

It looks like some old perls for 16.04 are available now

❯ for ubuntu_version in 14.04 16.04; do for perl_version in 5.8 5.10 5.12 5.14 5.16 5.18 5.20 5.22 5.24 5.26 5.28 5.30; do printf "ubuntu_version %s, perl_version %4s, http_status %d\n" $ubuntu_version $perl_version $(curl -X HEAD -w '%{http_code}\n' -s https://storage.googleapis.com/travis-ci-language-archives/perl/binaries/ubuntu/$ubuntu_version/x86_64/perl-$perl_version.tar.bz2); done; done
ubuntu_version 14.04, perl_version  5.8, http_status 200
ubuntu_version 14.04, perl_version 5.10, http_status 200
ubuntu_version 14.04, perl_version 5.12, http_status 200
ubuntu_version 14.04, perl_version 5.14, http_status 200
ubuntu_version 14.04, perl_version 5.16, http_status 200
ubuntu_version 14.04, perl_version 5.18, http_status 200
ubuntu_version 14.04, perl_version 5.20, http_status 200
ubuntu_version 14.04, perl_version 5.22, http_status 200
ubuntu_version 14.04, perl_version 5.24, http_status 200
ubuntu_version 14.04, perl_version 5.26, http_status 200
ubuntu_version 14.04, perl_version 5.28, http_status 200
ubuntu_version 14.04, perl_version 5.30, http_status 200
ubuntu_version 16.04, perl_version  5.8, http_status 404
ubuntu_version 16.04, perl_version 5.10, http_status 404
ubuntu_version 16.04, perl_version 5.12, http_status 404
ubuntu_version 16.04, perl_version 5.14, http_status 200
ubuntu_version 16.04, perl_version 5.16, http_status 200
ubuntu_version 16.04, perl_version 5.18, http_status 200
ubuntu_version 16.04, perl_version 5.20, http_status 200
ubuntu_version 16.04, perl_version 5.22, http_status 200
ubuntu_version 16.04, perl_version 5.24, http_status 200
ubuntu_version 16.04, perl_version 5.26, http_status 200
ubuntu_version 16.04, perl_version 5.28, http_status 200
ubuntu_version 16.04, perl_version 5.30, http_status 200

[oalders]

Great! Let's see what happens with #294. :)

[skaji]

Oh, no. 5.8, 5.10, 5.12 for ubuntu 16.04 are still missing.

[oalders]

There has been some progress on travis-perl-helpers lately. Perhaps everything will magically "just work"?

[skaji]

OK. Let's see how it goes:)