GitHub Actions: Add macOS cases.

[junaruga]

• Migrate macOS cases in Travis to GitHub Actions.

• Increase the expected time in the test to avoid the following random failures
  on macOS.

  1) Mysql2::Client#query threaded queries should be supported
     Failure/Error: expect(stop - start).to be_within(0.1).of(sleep_time)
       expected 0.632204999999999 to be within 0.1 of 0.5
     # ./spec/mysql2/client_spec.rb:711:in `block (3 levels) in <top (required)>'
  

  3) Mysql2::Client#query should run signal handlers while waiting for a response
     Failure/Error: expect(mark.fetch(:QUERY_END) - mark.fetch(:QUERY_START)).to be_within(0.1).of(query_time)
       expected 1.1042130000000157 to be within 0.1 of 1.0
     # ./spec/mysql2/client_spec.rb:632:in `block (3 levels) in <top (required)>'
  

Notes

• I renamed .github/workflows/ubuntu.yml to build.yml again, after adding the macOS cases to the file. I considered the name ubuntu_macos.yml. But thinking about we want to keep a same name for a long time, and considering the name (name: Build) is used as a build badge name when we will add it later. The name Build makes sense to me.

• In Travis macOS case, the brew package mariadb-connector-c was installed. So I always installed the mariadb-connector-c in GitHub Actions macOS case too. However when we do not actually install it on the db: '[email protected]' case of the macOS, rake compile can be compiled, and there are some test failures. In db: '[email protected]' case, rake compile shows the following library missing error when mariadb-connector-c is not installed.

  checking for -lmysqlclient... no
  mysql client is missing. You may need to 'brew install mysql' or 'port install mysql', and try again.
  

  We might be able to install mariadb-connector-c conditionally on macOS case like this.

  brew install "${DB}"
  if [[ -n ${DB-} && x$DB =~ ^xmariadb ]]; then
    brew install mariadb-connector-c
  fi
  

[junaruga]

• I renamed the environment variable GITHUB_ACTION to GITHUB_ACTIONS. I think the GITHUB_ACTIONS showing always true on GitHub Actions environment is a right environment variable, and what I wanted to use. See https://docs.github.com/en/actions/reference/environment-variables .

[junaruga]

• I renamed CHANGED_PWD to CHANGED_PASSWORD, because PWD makes me imagine pwd (print working directory) command. Sorry it was my typo.

[junaruga]

The new macOS db: '[email protected]' case showed the error when running mysql -u root -e 'CREATE DATABASE /*M!50701 IF NOT EXISTS */ test', because it was recognized as mysql -u root -e 'CREATE DATABASE test' and there was test database already. As every used database supports IF NOT EXISTS in CIs, I think we can remove the /*M!50701 ... */.

[junaruga]

The CIs are okay for both GitHub Actions and Travis CI. I noticed the "Checks" tab showing the result of GitHub Actions. It looks convenient.

[junaruga]

I added one more commit for the review. Now MariaDB 10.5 (10.5.9) and MySQL 8.0 (8.0.23) are set on the macOS cases. I removed the mariadb-connector-c brew package of installing, because it was conflicted with the mariadb brew package. And both latest MariaDB and MySQL works without the mariadb-connector-c.

• On MariaDB 10.5 (10.5.9), the tests fail with Test failures on MariaDB performance_schema: OFF #965, tests failing with mariadb10.5: Mysql2::Statement #1152.
• On MySQL 8.0 (8.0.23), the tests fail with mysql80: Mysql2::Client session_track fails on mysql >= 8.0.20 or 8.0.21? #1165.

[junaruga]

I did split the previous 2 commits to 4 commits, splitting the previous 1st commit about migrating macOS and renaming variables. I think it's better to see the commit about migrating macOS. The CIs looks okay. (Travis log on my forked repository).

[sodabrew]

Looks good!