Restructured into a collection

example/inventory/00-data.yml

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+all:
+  hosts:
+
+    localhost: {}
+
+    # All of this should obviously come from some other inventory plugin.
+
+    evil-vm:
+      inv__data:
+        network: death
+        service: evil
+        instance: chaos
+        unredeemable: true
+    evil-but-nicer-vm:
+      inv__data:
+        network: death
+        service: evil
+        instance: chaos
+
+    vm00:
+      inv__data:
+        network: dev
+        service: ldap
+        instance: dev
+        component: front
+        fostack: 1
+    vm01:
+      inv__data:
+        network: dev
+        service: ldap
+        instance: dev
+        component: front
+        fostack: 2
+    vm02:
+      inv__data:
+        network: dev
+        service: ldap
+        instance: dev
+        component: back
+        subcomponent: ro
+        fostack: 1
+    vm03:
+      inv__data:
+        network: dev
+        service: ldap
+        instance: dev
+        component: back
+        subcomponent: ro
+        fostack: 2
+    vm04:
+      inv__data:
+        network: dev
+        service: ldap
+        instance: dev
+        component: back
+        subcomponent: rw
+
+    vm05:
+      inv__data:
+        network: infra
+        service: ldap
+        instance: prod
+        component: front
+        fostack: 1
+    vm06:
+      inv__data:
+        network: infra
+        service: ldap
+        instance: prod
+        component: front
+        fostack: 2
+    vm07:
+      inv__data:
+        network: infra
+        service: ldap
+        instance: prod
+        component: back
+        subcomponent: ro
+        fostack: 1
+    vm08:
+      inv__data:
+        network: infra
+        service: ldap
+        instance: prod
+        component: back
+        subcomponent: ro
+        fostack: 2
+    vm09:
+      inv__data:
+        network: infra
+        service: ldap
+        instance: dev
+        component: back
+        subcomponent: rw

example/inventory/01-test-reconstructed.yml

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+---
+plugin: tseeker.reconstructed.reconstructed
+instructions:
+
+  # Check whether that host is managed
+  - action: set_fact
+    name: inv__managed
+    value: >-
+      {{ inv__data is defined
+         and inv__data.network is defined
+         and inv__data.service is defined
+         and inv__data.instance is defined }}
+  - when: not inv__managed
+    action: stop
+
+  # Fail when the host name starts with "evil".
+  - action: block
+    block:
+      - when: inventory_hostname.startswith( 'evil' )
+        action: fail
+        msg: '{{ inventory_hostname }} is obviously evil, skipping.'
+    rescue:
+      # Do not crash on redeemably evil VMs, but still skip them.
+      - when: inv__data.unredeemable is defined
+        action: fail
+        msg: '{{ reconstructed_error }}'
+      - action: create_group
+        group: reedmably_evil
+        add_host: true
+      - action: stop
+
+  # Only create the managed groups if we *have* managed hosts
+  - action: block
+    run_once: true
+    block:
+      - action: create_group
+        group: managed
+      - loop: [ by_environment, by_network, by_failover_stack, by_service ]
+        action: create_group
+        group: '{{ item }}'
+        parent: managed
+
+  # Copy inv__data fields to separate inv__ variables
+  - loop:
+      - component
+      - description
+      - fostack
+      - instance
+      - network
+      - service
+      - subcomponent
+    when: inv__data[item] is defined
+    action: set_fact
+    name: inv__{{ item }}
+    value: '{{ inv__data[ item ] }}'
+
+  # Environment variable and groups
+  - action: set_fact
+    name: inv__environment
+    value: >-
+      {{
+        inv__data.environment | default(
+          ( inv__instance == "prod" ) | ternary( "prod", "dev" )
+        )
+      }}
+  - action: create_group
+    group: env_{{ inv__environment }}
+    parent: by_environment
+    add_host: true
+
+  # Failover stack group
+  - action: create_group
+    group: >-
+      {{
+        ( inv__fostack is defined )
+        | ternary( "fostack_" ~ inv__fostack | default("") , "no_failover" )
+      }}
+    parent: by_failover_stack
+    add_host: true
+
+  # Network group
+  - action: create_group
+    group: net_{{ inv__network }}
+    parent: by_network
+    add_host: true
+
+  # Service group
+  - action: set_var
+    name: service_group
+    value: svc_{{ inv__service }}
+  - action: create_group
+    group: '{{ service_group }}'
+    parent: by_service
+
+  # Component group. We add the host directly if there is no subcomponent.
+  - when: inv__component is defined
+    action: block
+    vars:
+      comp_group: svcm_{{ inv__service }}_{{ inv__component }}
+    block:
+      - action: create_group
+        group: '{{ comp_group }}'
+        parent: '{{ service_group }}'
+      # Subcomponent group, or lack thereof.
+      - when: inv__subcomponent is not defined
+        action: add_host
+        group: '{{ comp_group }}'
+      - when: inv__subcomponent is defined
+        action: create_group
+        group: svcm_{{ inv__service }}_{{ inv__subcomponent }}
+        parent: '{{ comp_group }}'
+        add_host: true