.drone.yml

---
{
   "kind": "pipeline",
   "name": "default",
   "steps": [
      {
         "commands": [
            "apt-get update",
            "apt-get install --yes locales",
            "echo \"en_US.UTF-8 UTF-8\" > /etc/locale.gen",
            "locale-gen"
         ],
         "image": "buildpack-deps:stable",
         "name": "install locales",
         "volumes": [
            {
               "name": "locales",
               "path": "/usr/lib/locale"
            }
         ]
      },
      {
         "commands": [
            "apt-get update",
            "apt-get install --yes git",
            "git clone https://github.com/Homebrew/brew /home/linuxbrew/.linuxbrew/Homebrew",
            "mkdir -p /home/linuxbrew/.linuxbrew/bin",
            "ln -s ../Homebrew/bin/brew /home/linuxbrew/.linuxbrew/bin"
         ],
         "image": "buildpack-deps:stable",
         "name": "install Linuxbrew",
         "volumes": [
            {
               "name": "linuxbrew",
               "path": "/home/linuxbrew/.linuxbrew"
            }
         ]
      },
      {
         "commands": [
            "eval \"$(/home/linuxbrew/.linuxbrew/bin/brew shellenv)\"",
            "brew update",
            "brew bundle"
         ],
         "depends_on": [
            "install locales",
            "install Linuxbrew"
         ],
         "environment": {
            "HOMEBREW_DEVELOPER": 1,
            "HOMEBREW_NO_ANALYTICS": 1,
            "HOMEBREW_NO_AUTO_UPDATE": 1,
            "HOMEBREW_NO_INSTALL_CLEANUP": 1
         },
         "image": "buildpack-deps:stable",
         "name": "install ci deps",
         "volumes": [
            {
               "name": "locales",
               "path": "/usr/lib/locale"
            },
            {
               "name": "linuxbrew",
               "path": "/home/linuxbrew/.linuxbrew"
            },
            {
               "name": "cache",
               "path": "/root/.cache"
            }
         ]
      },
      {
         "commands": [
            "eval \"$(/home/linuxbrew/.linuxbrew/bin/brew shellenv)\"",
            "cask install",
            "cask exec ert-runner"
         ],
         "depends_on": [
            "install ci deps"
         ],
         "environment": {
            "TARGET_ROOT": "/tmp/elpa-clone/emacs24.5"
         },
         "image": "silex/emacs:24.5-ci-cask",
         "name": "test-emacs24.5",
         "volumes": [
            {
               "name": "locales",
               "path": "/usr/lib/locale"
            },
            {
               "name": "linuxbrew",
               "path": "/home/linuxbrew/.linuxbrew"
            }
         ]
      },
      {
         "commands": [
            "eval \"$(/home/linuxbrew/.linuxbrew/bin/brew shellenv)\"",
            "cask install",
            "cask exec ert-runner"
         ],
         "depends_on": [
            "install ci deps"
         ],
         "environment": {
            "TARGET_ROOT": "/tmp/elpa-clone/emacs25.3"
         },
         "image": "silex/emacs:25.3-ci-cask",
         "name": "test-emacs25.3",
         "volumes": [
            {
               "name": "locales",
               "path": "/usr/lib/locale"
            },
            {
               "name": "linuxbrew",
               "path": "/home/linuxbrew/.linuxbrew"
            }
         ]
      },
      {
         "commands": [
            "eval \"$(/home/linuxbrew/.linuxbrew/bin/brew shellenv)\"",
            "cask install",
            "cask exec ert-runner"
         ],
         "depends_on": [
            "install ci deps"
         ],
         "environment": {
            "TARGET_ROOT": "/tmp/elpa-clone/emacs26.3"
         },
         "image": "silex/emacs:26.3-ci-cask",
         "name": "test-emacs26.3",
         "volumes": [
            {
               "name": "locales",
               "path": "/usr/lib/locale"
            },
            {
               "name": "linuxbrew",
               "path": "/home/linuxbrew/.linuxbrew"
            }
         ]
      }
   ],
   "volumes": [
      {
         "name": "cache",
         "temp": { }
      },
      {
         "name": "locales",
         "temp": { }
      },
      {
         "name": "linuxbrew",
         "temp": { }
      }
   ]
}
...