feat: add Gentoo support

Make use of the new pre-salted images:

* https://gitlab.com/saltstack-formulas/infrastructure/salt-image-builder/-/merge_requests/55

.travis.yml

@@ -101,6 +101,8 @@ jobs:
     # - env: INSTANCE=default-fedora-31-master-py3
     - env: INSTANCE=default-opensuse-leap-152-master-py3
     # - env: INSTANCE=default-amazonlinux-2-master-py3
+    - env: INSTANCE=gentoo-gentoo-stage3-latest-master-py3
+    - env: INSTANCE=gentoo-gentoo-stage3-systemd-master-py3
     # - env: INSTANCE=default-debian-10-3001-py3
     # - env: INSTANCE=default-debian-9-3001-py3
     # - env: INSTANCE=default-ubuntu-2004-3001-py3
@@ -113,6 +115,8 @@ jobs:
     # - env: INSTANCE=default-amazonlinux-2-3001-py3
     # - env: INSTANCE=default-oraclelinux-8-3001-py3
     # - env: INSTANCE=default-oraclelinux-7-3001-py3
+    # - env: INSTANCE=gentoo-gentoo-stage3-latest-3001-py3
+    # - env: INSTANCE=gentoo-gentoo-stage3-systemd-3001-py3
     # - env: INSTANCE=default-debian-10-3000-3-py3
     # - env: INSTANCE=default-debian-9-3000-3-py3
     # - env: INSTANCE=default-ubuntu-1804-3000-3-py3
@@ -121,6 +125,8 @@ jobs:
     # - env: INSTANCE=default-fedora-31-3000-3-py3
     # - env: INSTANCE=default-opensuse-leap-152-3000-3-py3
     # - env: INSTANCE=default-amazonlinux-2-3000-3-py3
+    # - env: INSTANCE=gentoo-gentoo-stage3-latest-3000-3-py3
+    # - env: INSTANCE=gentoo-gentoo-stage3-systemd-3000-3-py3
     # - env: INSTANCE=default-ubuntu-1804-3000-3-py2
     # - env: INSTANCE=default-ubuntu-1604-3000-3-py2
     - env: INSTANCE=default-arch-base-latest-3000-3-py2

TEMPLATE/osfamilymap.yaml

@@ -24,7 +24,9 @@ Suse:
   pkg:
     name: TEMPLATE-suse
 
-Gentoo: {}
+Gentoo:
+  pkg:
+    name: TEMPLATE-gentoo
 
 Arch:
   pkg:

kitchen.yml

@@ -73,6 +73,13 @@ platforms:
   - name: amazonlinux-2-master-py3
     driver:
       image: saltimages/salt-master-py3:amazonlinux-2
+  - name: gentoo-stage3-latest-master-py3
+    driver:
+      image: saltimages/salt-master-py3:gentoo-stage3-latest
+      run_command: /sbin/init
+  - name: gentoo-stage3-systemd-master-py3
+    driver:
+      image: saltimages/salt-master-py3:gentoo-stage3-systemd
 
   ## SALT `3001`
   - name: debian-10-3001-py3
@@ -116,6 +123,13 @@ platforms:
   - name: oraclelinux-7-3001-py3
     driver:
       image: saltimages/salt-3001-py3:oraclelinux-7
+  - name: gentoo-stage3-latest-3001-py3
+    driver:
+      image: saltimages/salt-3001-py3:gentoo-stage3-latest
+      run_command: /sbin/init
+  - name: gentoo-stage3-systemd-3001-py3
+    driver:
+      image: saltimages/salt-3001-py3:gentoo-stage3-systemd
 
   ## SALT `3000.3`
   - name: debian-10-3000-3-py3
@@ -147,6 +161,13 @@ platforms:
   - name: amazonlinux-2-3000-3-py3
     driver:
       image: saltimages/salt-3000.3-py3:amazonlinux-2
+  - name: gentoo-stage3-latest-3000-3-py3
+    driver:
+      image: saltimages/salt-3000.3-py3:gentoo-stage3-latest
+      run_command: /sbin/init
+  - name: gentoo-stage3-systemd-3000-3-py3
+    driver:
+      image: saltimages/salt-3000.3-py3:gentoo-stage3-systemd
   - name: ubuntu-1804-3000-3-py2
     driver:
       image: saltimages/salt-3000.3-py2:ubuntu-18.04
@@ -191,6 +212,12 @@ suites:
     excludes:
       - centos-6-2019-2-py2
       - amazonlinux-1-2019-2-py2
+      - gentoo-stage3-latest-master-py3
+      - gentoo-stage3-systemd-master-py3
+      - gentoo-stage3-latest-3001-py3
+      - gentoo-stage3-systemd-3001-py3
+      - gentoo-stage3-latest-3000-3-py3
+      - gentoo-stage3-systemd-3000-3-py3
     provisioner:
       state_top:
         base:
@@ -231,3 +258,31 @@ suites:
     verifier:
       inspec_tests:
         - path: test/integration/default
+  - name: gentoo
+    includes:
+      - gentoo-stage3-latest-master-py3
+      - gentoo-stage3-systemd-master-py3
+      - gentoo-stage3-latest-3001-py3
+      - gentoo-stage3-systemd-3001-py3
+      - gentoo-stage3-latest-3000-3-py3
+      - gentoo-stage3-systemd-3000-3-py3
+    provisioner:
+      state_top:
+        base:
+          '*':
+            - TEMPLATE._mapdata
+            - TEMPLATE
+      pillars:
+        top.sls:
+          base:
+            '*':
+              - TEMPLATE
+              - gentoo
+              - define_roles
+      pillars_from_files:
+        TEMPLATE.sls: pillar.example
+        gentoo.sls: test/salt/pillar/gentoo.sls
+        define_roles.sls: test/salt/pillar/define_roles.sls
+    verifier:
+      inspec_tests:
+        - path: test/integration/default

test/integration/default/files/_mapdata/gentoo-2-sysd.yaml

@@ -0,0 +1,34 @@
+# yamllint disable rule:indentation rule:line-length
+# Gentoo-2
+---
+added_in_defaults: defaults_value
+added_in_lookup: lookup_value
+added_in_pillar: pillar_value
+arch: amd64
+config: /etc/template-formula.conf
+lookup:
+  added_in_lookup: lookup_value
+  master: template-master
+  winner: lookup
+master: template-master
+pkg:
+  name: app-shells/bash
+rootgroup: root
+service:
+  name: systemd-journald
+subcomponent:
+  config: /etc/TEMPLATE-subcomponent-formula.conf
+tofs:
+  files_switch:
+  - any/path/can/be/used/here
+  - id
+  - roles
+  - osfinger
+  - os
+  - os_family
+  source_files:
+    TEMPLATE-config-file-file-managed:
+    - example.tmpl.jinja
+    TEMPLATE-subcomponent-config-file-file-managed:
+    - subcomponent-example.tmpl.jinja
+winner: pillar

test/integration/default/files/_mapdata/gentoo-2-sysv.yaml

@@ -0,0 +1,34 @@
+# yamllint disable rule:indentation rule:line-length
+# Gentoo-2
+---
+added_in_defaults: defaults_value
+added_in_lookup: lookup_value
+added_in_pillar: pillar_value
+arch: amd64
+config: /etc/template-formula.conf
+lookup:
+  added_in_lookup: lookup_value
+  master: template-master
+  winner: lookup
+master: template-master
+pkg:
+  name: app-shells/bash
+rootgroup: root
+service:
+  name: mtab
+subcomponent:
+  config: /etc/TEMPLATE-subcomponent-formula.conf
+tofs:
+  files_switch:
+  - any/path/can/be/used/here
+  - id
+  - roles
+  - osfinger
+  - os
+  - os_family
+  source_files:
+    TEMPLATE-config-file-file-managed:
+    - example.tmpl.jinja
+    TEMPLATE-subcomponent-config-file-file-managed:
+    - subcomponent-example.tmpl.jinja
+winner: pillar

test/integration/default/inspec.yml

@@ -20,3 +20,4 @@ supports:
   - platform-name: amazon
   - platform-name: oracle
   - platform-name: arch
+  - platform-name: gentoo

test/integration/share/inspec.yml

@@ -17,3 +17,4 @@ supports:
   - platform-name: amazon
   - platform-name: oracle
   - platform-name: arch
+  - platform-name: gentoo

test/integration/share/libraries/system.rb

@@ -49,11 +49,22 @@ class SystemResource < Inspec.resource(1)
       inspec.platform[:release].gsub(/2018.*/, '1')
     when 'arch'
       'base-latest'
+    when 'gentoo'
+      "#{inspec.platform[:release].split('.')[0]}-#{derive_gentoo_init_system}"
     else
       inspec.platform[:release]
     end
   end
 
+  def derive_gentoo_init_system
+    case inspec.command('systemctl').exist?
+    when true
+      'sysd'
+    else
+      'sysv'
+    end
+  end
+
   def build_platform_finger
     "#{build_platform_name}-#{build_finger_release}"
   end

test/salt/pillar/gentoo.sls

@@ -0,0 +1,10 @@
+# -*- coding: utf-8 -*-
+# vim: ft=yaml
+---
+portage:
+  sync_wait_one_day: true
+TEMPLATE:
+  pkg:
+    name: 'app-shells/bash'
+  service:
+    name: "{{ 'systemd-journald' if grains.init == 'systemd' else 'mtab' }}"