ci(kitchen+travis): modify matrix to include develop platform

* Use balanced matrix based on `template-formula` guidelines
* Initial ref: saltstack-formulas/template-formula#118

.travis.yml

@@ -11,17 +11,34 @@ language: ruby
 services:
   - docker
 
-before_install:
-  - bundle install
-
 # Make sure the instances listed below match up with
 # the `platforms` defined in `kitchen.yml`
 env:
   matrix:
+    - INSTANCE: default-debian-9-develop-py3
+    - INSTANCE: default-ubuntu-1804-develop-py3
+    # - INSTANCE: default-centos-7-develop-py3
+    # - INSTANCE: default-fedora-29-develop-py3
+    # - INSTANCE: default-opensuse-leap-15-develop-py3
     - INSTANCE: default-debian-9-2019-2-py3
     - INSTANCE: default-ubuntu-1804-2019-2-py3
-    - INSTANCE: default-ubuntu-1604-2018-3-py2
+    # - INSTANCE: default-centos-7-2019-2-py3
+    # - INSTANCE: default-fedora-29-2019-2-py3
+    # - INSTANCE: default-opensuse-leap-15-2019-2-py3
+    - INSTANCE: default-debian-9-2018-3-py2
+    # - INSTANCE: default-ubuntu-1604-2018-3-py2
+    # - INSTANCE: default-centos-7-2018-3-py2
+    # - INSTANCE: default-fedora-29-2018-3-py2
+    # TODO: Use this when fixed instead of `opensuse-leap-42`
+    # Ref: https://github.com/netmanagers/salt-image-builder/issues/2
+    # - INSTANCE: default-opensuse-leap-15-2018-3-py2
+    # - INSTANCE: default-opensuse-leap-42-2018-3-py2
+    # - INSTANCE: default-debian-8-2017-7-py2
     - INSTANCE: default-ubuntu-1604-2017-7-py2
+    # TODO: Enable after improving the formula to work with other than `systemd`
+    # - INSTANCE: default-centos-6-2017-7-py2
+    # - INSTANCE: default-fedora-28-2017-7-py2
+    # - INSTANCE: default-opensuse-leap-42-2017-7-py2
 
 script:
   - bundle exec kitchen verify ${INSTANCE}
@@ -45,7 +62,7 @@ jobs:
       script:
         # Update `AUTHORS.md`
         - export MAINTAINER_TOKEN=${GH_TOKEN}
-        - go get github.com/alxwr/maintainer
+        - go get github.com/myii/maintainer
         - maintainer contributor
 
         # Install all dependencies required for `semantic-release`
@@ -58,4 +75,3 @@ jobs:
         script:
           # Run `semantic-release`
           - npx semantic-release@15
-

kitchen.yml

@@ -11,23 +11,100 @@ driver:
 # Make sure the platforms listed below match up with
 # the `env.matrix` instances defined in `.travis.yml`
 platforms:
+  ## SALT `develop`
+  - name: debian-9-develop-py3
+    driver:
+      image: netmanagers/salt-develop-py3:debian-9
+      provision_command:
+        - curl -o bootstrap-salt.sh -L https://bootstrap.saltstack.com
+        - sh bootstrap-salt.sh -XdPbfrq -x python3 git develop
+  - name: ubuntu-1804-develop-py3
+    driver:
+      image: netmanagers/salt-develop-py3:ubuntu-18.04
+      provision_command:
+        - curl -o bootstrap-salt.sh -L https://bootstrap.saltstack.com
+        - sh bootstrap-salt.sh -XdPbfrq -x python3 git develop
+  - name: centos-7-develop-py3
+    driver:
+      image: netmanagers/salt-develop-py3:centos-7
+      provision_command:
+        - curl -o bootstrap-salt.sh -L https://bootstrap.saltstack.com
+        - sh bootstrap-salt.sh -XdPbfrq -x python3 git develop
+  - name: fedora-29-develop-py3
+    driver:
+      image: netmanagers/salt-develop-py3:fedora-29
+      provision_command:
+        - curl -o bootstrap-salt.sh -L https://bootstrap.saltstack.com
+        - sh bootstrap-salt.sh -XdPbfrq -x python3 git develop
+  - name: opensuse-leap-15-develop-py3
+    driver:
+      image: netmanagers/salt-develop-py3:opensuse-leap-15
+      provision_command:
+        - curl -o bootstrap-salt.sh -L https://bootstrap.saltstack.com
+        - sh bootstrap-salt.sh -XdPbfrq -x python3 git develop
+      run_command: /usr/lib/systemd/systemd
+
   ## SALT 2019.2
   - name: debian-9-2019-2-py3
     driver:
       image: netmanagers/salt-2019.2-py3:debian-9
   - name: ubuntu-1804-2019-2-py3
     driver:
-      image: netmanagers/salt-2019.2-py3:ubuntu-1804
+      image: netmanagers/salt-2019.2-py3:ubuntu-18.04
+  - name: centos-7-2019-2-py3
+    driver:
+      image: netmanagers/salt-2019.2-py3:centos-7
+  - name: fedora-29-2019-2-py3
+    driver:
+      image: netmanagers/salt-2019.2-py3:fedora-29
+  - name: opensuse-leap-15-2019-2-py3
+    driver:
+      image: netmanagers/salt-2019.2-py3:opensuse-leap-15
+      run_command: /usr/lib/systemd/systemd
 
   ## SALT 2018.3
+  - name: debian-9-2018-3-py2
+    driver:
+      image: netmanagers/salt-2018.3-py2:debian-9
   - name: ubuntu-1604-2018-3-py2
     driver:
-      image: netmanagers/salt-2018.3-py2:ubuntu-1604
+      image: netmanagers/salt-2018.3-py2:ubuntu-16.04
+  - name: centos-7-2018-3-py2
+    driver:
+      image: netmanagers/salt-2018.3-py2:centos-7
+  - name: fedora-29-2018-3-py2
+    driver:
+      image: netmanagers/salt-2018.3-py2:fedora-29
+  # TODO: Use this when fixed instead of `opensuse-leap-42`
+  # Ref: https://github.com/netmanagers/salt-image-builder/issues/2
+  # - name: opensuse-leap-15-2018-3-py2
+  #   driver:
+  #     image: netmanagers/salt-2018.3-py2:opensuse-leap-15
+  #     run_command: /usr/lib/systemd/systemd
+  - name: opensuse-leap-42-2018-3-py2
+    driver:
+      image: netmanagers/salt-2018.3-py2:opensuse-leap-42
+      run_command: /usr/lib/systemd/systemd
 
   ## SALT 2017.7
+  - name: debian-8-2017-7-py2
+    driver:
+      image: netmanagers/salt-2017.7-py2:debian-8
   - name: ubuntu-1604-2017-7-py2
     driver:
-      image: netmanagers/salt-2017.7-py2:ubuntu-1604
+      image: netmanagers/salt-2017.7-py2:ubuntu-16.04
+  # TODO: Modify the formula to work for non-`systemd` platforms
+  - name: centos-6-2017-7-py2
+    driver:
+      image: netmanagers/salt-2017.7-py2:centos-6
+      run_command: /sbin/init
+  - name: fedora-28-2017-7-py2
+    driver:
+      image: netmanagers/salt-2017.7-py2:fedora-28
+  - name: opensuse-leap-42-2017-7-py2
+    driver:
+      image: netmanagers/salt-2017.7-py2:opensuse-leap-42
+      run_command: /usr/lib/systemd/systemd
 
 provisioner:
   name: salt_solo