ansible-lint: don't compare to empty string [E602] (#4665)

.ansible-lint

@@ -15,5 +15,4 @@ skip_list:
   - '502'
   - '503'
   - '504'
-  - '602'
   - '701'

contrib/vault/roles/vault/tasks/shared/sync_file.yml

@@ -5,17 +5,19 @@
   set_fact:
     sync_file_dir: "{{ sync_file_path | dirname }}"
     sync_file: "{{ sync_file_path | basename }}"
-  when: sync_file_path is defined and sync_file_path != ''
+  when:
+    - sync_file_path is defined
+    - sync_file_path
 
 - name: "sync_file | Set fact for sync_file_path when undefined"
   set_fact:
     sync_file_path: "{{ (sync_file_dir, sync_file)|join('/') }}"
-  when: sync_file_path is not defined or sync_file_path == ''
+  when: sync_file_path is not defined or not sync_file_path
 
 - name: "sync_file | Set fact for key path name"
   set_fact:
     sync_file_key_path: "{{ sync_file_path.rsplit('.', 1)|first + '-key.' + sync_file_path.rsplit('.', 1)|last }}"
-  when: sync_file_key_path is not defined or sync_file_key_path == ''
+  when: sync_file_key_path is not defined or not sync_file_key_path
 
 - name: "sync_file | Check if {{sync_file_path}} file exists"
   stat:
@@ -46,17 +48,17 @@
 - name: "sync_file | Remove sync sources with files that do not match sync_file_srcs|first"
   set_fact:
     _: "{% if inventory_hostname in sync_file_srcs %}{{ sync_file_srcs.remove(inventory_hostname) }}{% endif %}"
-  when: >-
-        sync_file_srcs|d([])|length > 1 and
-        inventory_hostname != sync_file_srcs|first
+  when:
+    - sync_file_srcs|d([])|length > 1
+    - inventory_hostname != sync_file_srcs|first
 
 - name: "sync_file | Remove sync sources with keys that do not match sync_file_srcs|first"
   set_fact:
     _: "{% if inventory_hostname in sync_file_srcs %}{{ sync_file_srcs.remove(inventory_hostname) }}{% endif %}"
-  when: >-
-        sync_file_is_cert|d() and
-        sync_file_key_srcs|d([])|length > 1 and
-        inventory_hostname != sync_file_key_srcs|first
+  when:
+    - sync_file_is_cert|d()
+    - sync_file_key_srcs|d([])|length > 1
+    - inventory_hostname != sync_file_key_srcs|first
 
 - name: "sync_file | Consolidate file and key sources"
   set_fact:

roles/container-engine/docker/tasks/set_facts_dns.yml

@@ -43,12 +43,12 @@
 - name: add system nameservers to docker options
   set_fact:
     docker_dns_servers: "{{ docker_dns_servers | union(system_nameservers.stdout_lines) | unique }}"
-  when: system_nameservers.stdout != ""
+  when: system_nameservers.stdout
 
 - name: add system search domains to docker options
   set_fact:
     docker_dns_search_domains: "{{ docker_dns_search_domains | union(system_search_domains.stdout.split()|default([])) | unique }}"
-  when: system_search_domains.stdout != ""
+  when: system_search_domains.stdout
 
 - name: check number of nameservers
   fail:

roles/download/tasks/set_docker_image_facts.yml

@@ -1,7 +1,7 @@
 ---
 - set_fact:
     pull_by_digest: >-
-      {%- if download.sha256 is defined and download.sha256 != '' -%}true{%- else -%}false{%- endif -%}
+      {%- if download.sha256 is defined and download.sha256 -%}true{%- else -%}false{%- endif -%}
 
 - set_fact:
     pull_args: >-
@@ -25,6 +25,9 @@
 - name: Check the local digest sha256 corresponds to the given image tag
   assert:
     that: "{{download.repo}}:{{download.tag}} in docker_images.stdout.split(',')"
-  when: not download_always_pull and not pull_required and pull_by_digest
+  when:
+    - not download_always_pull
+    - not pull_required
+    - pull_by_digest
   tags:
     - asserts

roles/kubernetes-apps/cloud_controller/oci/tasks/credentials-check.yml

@@ -3,56 +3,65 @@
 - name: "OCI Cloud Controller | Credentials Check | oci_private_key"
   fail:
     msg: "oci_private_key is missing"
-  when: (not oci_use_instance_principals) and
-        (oci_private_key is not defined or oci_private_key == "")
+  when:
+    - not oci_use_instance_principals
+    - oci_private_key is not defined or not oci_private_key
 
 - name: "OCI Cloud Controller | Credentials Check | oci_region_id"
   fail:
     msg: "oci_region_id is missing"
-  when: (not oci_use_instance_principals) and
-        (oci_region_id is not defined or oci_region_id == "")
+  when:
+    - not oci_use_instance_principals
+    - oci_region_id is not defined or not oci_region_id
 
 - name: "OCI Cloud Controller | Credentials Check | oci_tenancy_id"
   fail:
     msg: "oci_tenancy_id is missing"
-  when: (not oci_use_instance_principals) and
-        (oci_tenancy_id is not defined or oci_tenancy_id == "")
+  when:
+    - not oci_use_instance_principals
+    - oci_tenancy_id is not defined or not oci_tenancy_id
 
 - name: "OCI Cloud Controller | Credentials Check | oci_user_id"
   fail:
     msg: "oci_user_id is missing"
-  when: (not oci_use_instance_principals) and
-        (oci_user_id is not defined or oci_user_id == "")
+  when:
+    - not oci_use_instance_principals
+    - oci_user_id is not defined or not oci_user_id
 
 - name: "OCI Cloud Controller | Credentials Check | oci_user_fingerprint"
   fail:
     msg: "oci_user_fingerprint is missing"
-  when: (not oci_use_instance_principals) and
-        (oci_user_fingerprint is not defined or oci_user_fingerprint == "")
+  when:
+    - not oci_use_instance_principals
+    - oci_user_fingerprint is not defined or not oci_user_fingerprint
 
 - name: "OCI Cloud Controller | Credentials Check | oci_compartment_id"
   fail:
     msg: "oci_compartment_id is missing. This is the compartment in which the cluster resides"
-  when: oci_compartment_id is not defined or oci_compartment_id == ""
+  when:
+    - oci_compartment_id is not defined or not oci_compartment_id
 
 - name: "OCI Cloud Controller | Credentials Check | oci_vnc_id"
   fail:
     msg: "oci_vnc_id is missin. This is the Virtual Cloud Network in which the cluster resides"
-  when: oci_vnc_id is not defined or oci_vnc_id == ""
+  when:
+    - oci_vnc_id is not defined or not oci_vnc_id
 
 - name: "OCI Cloud Controller | Credentials Check | oci_subnet1_id"
   fail:
     msg: "oci_subnet1_id is missing. This is the first subnet to which loadbalancers will be added"
-  when: oci_subnet1_id is not defined or oci_subnet1_id == ""
+  when:
+    - oci_subnet1_id is not defined or not oci_subnet1_id
 
 - name: "OCI Cloud Controller | Credentials Check | oci_subnet2_id"
   fail:
     msg: "oci_subnet2_id is missing. Two subnets are required for load balancer high availability"
   when:
     - oci_cloud_controller_version | version_compare('0.7.0', '<')
-  - oci_subnet2_id is not defined or oci_subnet2_id == ""
+    - oci_subnet2_id is not defined or not oci_subnet2_id
 
 - name: "OCI Cloud Controller | Credentials Check | oci_security_list_management"
   fail:
     msg: "oci_security_list_management is missing, or not defined correctly. Valid options are (All, Frontend, None)."
-  when: oci_security_list_management is not defined or oci_security_list_management not in ["All", "Frontend", "None"]
+  when:
+    - oci_security_list_management is not defined or oci_security_list_management not in ["All", "Frontend", "None"]

roles/kubernetes-apps/helm/tasks/main.yml

@@ -46,7 +46,7 @@
     {% if rbac_enabled %} --service-account=tiller{% endif %}
     {% if tiller_node_selectors is defined %} --node-selectors {{ tiller_node_selectors }}{% endif %}
     {% if kube_version is version('v1.11.1', '>=') %} --override spec.template.spec.priorityClassName={% if tiller_namespace == 'kube-system' %}system-cluster-critical{% else %}k8s-cluster-critical{% endif %}{% endif %}
-    {% if tiller_override is defined and tiller_override != "" %} --override {{ tiller_override }}{% endif %}
+    {% if tiller_override is defined and tiller_override %} --override {{ tiller_override }}{% endif %}
     {% if tiller_max_history is defined %} --history-max={{ tiller_max_history }}{% endif %}
     {% if tiller_enable_tls %} --tiller-tls --tiller-tls-verify --tiller-tls-cert={{ tiller_tls_cert }} --tiller-tls-key={{ tiller_tls_key }} --tls-ca-cert={{ tiller_tls_ca_cert }} {% endif %}
     {% if tiller_secure_release_info %} --override 'spec.template.spec.containers[0].command'='{/tiller,--storage=secret}' {% endif %}
@@ -67,7 +67,7 @@
     {% if rbac_enabled %} --service-account=tiller{% endif %}
     {% if tiller_node_selectors is defined %} --node-selectors {{ tiller_node_selectors }}{% endif %}
     {% if kube_version is version('v1.11.1', '>=') %} --override spec.template.spec.priorityClassName={% if tiller_namespace == 'kube-system' %}system-cluster-critical{% else %}k8s-cluster-critical{% endif %}{% endif %}
-    {% if tiller_override is defined and tiller_override != "" %} --override {{ tiller_override }}{% endif %}
+    {% if tiller_override is defined and tiller_override %} --override {{ tiller_override }}{% endif %}
     {% if tiller_max_history is defined %} --history-max={{ tiller_max_history }}{% endif %}
     {% if tiller_enable_tls %} --tiller-tls --tiller-tls-verify --tiller-tls-cert={{ tiller_tls_cert }} --tiller-tls-key={{ tiller_tls_key }} --tls-ca-cert={{ tiller_tls_ca_cert }} {% endif %}
     {% if tiller_secure_release_info %} --override 'spec.template.spec.containers[0].command'='{/tiller,--storage=secret}' {% endif %}
@@ -76,7 +76,7 @@
     | {{bin_dir}}/kubectl apply -f -
   changed_when: false
   when:
-    - (tiller_override is defined and tiller_override != "") or (kube_version is version('v1.11.1', '>='))
+    - (tiller_override is defined and tiller_override) or (kube_version is version('v1.11.1', '>='))
     - inventory_hostname == groups['kube-master'][0]
   environment: "{{proxy_env}}"
 

roles/kubernetes-apps/registry/tasks/main.yml

@@ -59,8 +59,8 @@
     - { name: registry-pvc, file: registry-pvc.yml, type: pvc }
   register: registry_manifests
   when:
-    - registry_storage_class != none and registry_storage_class != ""
-    - registry_disk_size != none and registry_disk_size != ""
+    - registry_storage_class != none and registry_storage_class
+    - registry_disk_size != none and registry_disk_size
     - inventory_hostname == groups['kube-master'][0]
 
 - name: Registry | Apply PVC manifests
@@ -73,6 +73,6 @@
     state: "latest"
   with_items: "{{ registry_manifests.results }}"
   when:
-    - registry_storage_class != none and registry_storage_class != ""
-    - registry_disk_size != none and registry_disk_size != ""
+    - registry_storage_class != none and registry_storage_class
+    - registry_disk_size != none and registry_disk_size
     - inventory_hostname == groups['kube-master'][0]

roles/kubernetes/node/tasks/azure-credential-check.yml

@@ -2,57 +2,57 @@
 - name: check azure_tenant_id value
   fail:
     msg: "azure_tenant_id is missing"
-  when: azure_tenant_id is not defined or azure_tenant_id == ""
+  when: azure_tenant_id is not defined or not azure_tenant_id
 
 - name: check openstack_username value
   fail:
     msg: "azure_subscription_id is missing"
-  when: azure_subscription_id is not defined or azure_subscription_id == ""
+  when: azure_subscription_id is not defined or not azure_subscription_id
 
 - name: check azure_aad_client_id value
   fail:
     msg: "azure_aad_client_id is missing"
-  when: azure_aad_client_id is not defined or azure_aad_client_id == ""
+  when: azure_aad_client_id is not defined or not azure_aad_client_id
 
 - name: check azure_aad_client_secret value
   fail:
     msg: "azure_aad_client_secret is missing"
-  when: azure_aad_client_secret is not defined or azure_aad_client_secret == ""
+  when: azure_aad_client_secret is not defined or not azure_aad_client_secret
 
 - name: check azure_resource_group value
   fail:
     msg: "azure_resource_group is missing"
-  when: azure_resource_group is not defined or azure_resource_group == ""
+  when: azure_resource_group is not defined or not azure_resource_group
 
 - name: check azure_location value
   fail:
     msg: "azure_location is missing"
-  when: azure_location is not defined or azure_location == ""
+  when: azure_location is not defined or not azure_location
 
 - name: check azure_subnet_name value
   fail:
     msg: "azure_subnet_name is missing"
-  when: azure_subnet_name is not defined or azure_subnet_name == ""
+  when: azure_subnet_name is not defined or not azure_subnet_name
 
 - name: check azure_security_group_name value
   fail:
     msg: "azure_security_group_name is missing"
-  when: azure_security_group_name is not defined or azure_security_group_name == ""
+  when: azure_security_group_name is not defined or not azure_security_group_name
 
 - name: check azure_vnet_name value
   fail:
     msg: "azure_vnet_name is missing"
-  when: azure_vnet_name is not defined or azure_vnet_name == ""
+  when: azure_vnet_name is not defined or not azure_vnet_name
 
 - name: check azure_vnet_resource_group value
   fail:
     msg: "azure_vnet_resource_group is missing"
-  when: azure_vnet_resource_group is not defined or azure_vnet_resource_group == ""
+  when: azure_vnet_resource_group is not defined or not azure_vnet_resource_group
 
 - name: check azure_route_table_name value
   fail:
     msg: "azure_route_table_name is missing"
-  when: azure_route_table_name is not defined or azure_route_table_name == ""
+  when: azure_route_table_name is not defined or not azure_route_table_name
 
 - name: check azure_loadbalancer_sku value
   fail:

roles/kubernetes/node/tasks/main.yml

@@ -194,7 +194,7 @@
     - cloud_provider is defined
     - cloud_provider == 'openstack'
     - openstack_cacert is defined
-    - openstack_cacert != ""
+    - openstack_cacert
   tags:
     - cloud-provider
 

roles/kubernetes/node/tasks/openstack-credential-check.yml

@@ -2,31 +2,33 @@
 - name: check openstack_auth_url value
   fail:
     msg: "openstack_auth_url is missing"
-  when: openstack_auth_url is not defined or openstack_auth_url == ""
+  when: openstack_auth_url is not defined or not openstack_auth_url
 
 - name: check openstack_username value
   fail:
     msg: "openstack_username is missing"
-  when: openstack_username is not defined or openstack_username == ""
+  when: openstack_username is not defined or not openstack_username
 
 - name: check openstack_password value
   fail:
     msg: "openstack_password is missing"
-  when: openstack_password is not defined or openstack_password == ""
+  when: openstack_password is not defined or not openstack_password
 
 - name: check openstack_region value
   fail:
     msg: "openstack_region is missing"
-  when: openstack_region is not defined or openstack_region == ""
+  when: openstack_region is not defined or not openstack_region
 
 - name: check openstack_tenant_id value
   fail:
     msg: "one of openstack_tenant_id or openstack_trust_id must be specified"
-  when: (openstack_tenant_id is not defined or openstack_tenant_id == "") and
-        openstack_trust_id is not defined
+  when:
+    - openstack_tenant_id is not defined or not openstack_tenant_id
+    - openstack_trust_id is not defined
 
 - name: check openstack_trust_id value
   fail:
     msg: "one of openstack_tenant_id or openstack_trust_id must be specified"
-  when: (openstack_trust_id is not defined or openstack_trust_id == "") and
-        openstack_tenant_id is not defined
+  when:
+    - openstack_trust_id is not defined or not openstack_trust_id
+    - openstack_tenant_id is not defined

roles/kubernetes/node/tasks/vsphere-credential-check.yml

@@ -2,7 +2,7 @@
 - name: check vsphere environment variables
   fail:
     msg: "{{ item.name }} is missing"
-  when: item.value is not defined or item.value == ''
+  when: item.value is not defined or not item.value
   with_items:
     - name: vsphere_vcenter_ip
       value: "{{ vsphere_vcenter_ip }}"

roles/kubernetes/preinstall/tasks/0010-swapoff.yml

@@ -15,4 +15,4 @@
   changed_when: no
 - name: Disable swap
   command: /sbin/swapoff -a
-  when: swapon.stdout != ""
+  when: swapon.stdout

roles/kubernetes/preinstall/tasks/0020-verify-settings.yml

@@ -146,7 +146,7 @@
   when:
     - kube_network_plugin == 'calico'
     - 'calico_version_on_server.stdout is defined'
-    - 'calico_version_on_server.stdout != ""'
+    - calico_version_on_server.stdout
     - inventory_hostname == groups['kube-master'][0]
   run_once: yes
 

roles/kubernetes/tokens/tasks/gen_tokens.yml

@@ -54,5 +54,8 @@
 
 - name: Gen_tokens | Copy tokens on masters
   shell: "echo '{{ tokens_data.stdout|quote }}' | base64 -d | tar xz -C /"
-  when: inventory_hostname in groups['kube-master'] and sync_tokens|default(false) and
-        inventory_hostname != groups['kube-master'][0] and tokens_data.stdout != ''
+  when:
+    - inventory_hostname in groups['kube-master']
+    - sync_tokens|default(false)
+    - inventory_hostname != groups['kube-master'][0]
+    - tokens_data.stdout

roles/network_plugin/calico/tasks/check.yml

@@ -38,7 +38,7 @@
         - calico_version_on_server.stdout is version('v3.0.0', '<')
 
   when:
-    - 'calico_version_on_server.stdout is defined'
-    - 'calico_version_on_server.stdout != ""'
+    - calico_version_on_server.stdout is defined
+    - calico_version_on_server.stdout
     - inventory_hostname == groups['kube-master'][0]
   run_once: yes

roles/upgrade/pre-upgrade/tasks/main.yml

@@ -23,7 +23,7 @@
 
 - set_fact:
     needs_cordoning: >-
-      {% if kubectl_node_ready.stdout == "True" and kubectl_node_schedulable.stdout == "" -%}
+      {% if kubectl_node_ready.stdout == "True" and not kubectl_node_schedulable.stdout -%}
       true
       {%- else -%}
       false
@@ -43,7 +43,7 @@
   when:
     - drain_nodes
     - needs_cordoning
-    - 'drain_pod_selector != ""'
+    - drain_pod_selector
 
 - name: Ensure minimum version for drain label selector if necessary
   assert:
@@ -51,7 +51,7 @@
   when:
     - drain_nodes
     - needs_cordoning
-    - 'drain_pod_selector != ""'
+    - drain_pod_selector
 
 - name: Drain node
   command: >-
@@ -61,7 +61,7 @@
     --grace-period {{ drain_grace_period }}
     --timeout {{ drain_timeout }}
     --delete-local-data {{ inventory_hostname }}
-    {% if drain_pod_selector != "" %}--pod-selector '{{ drain_pod_selector }}'{% endif %}
+    {% if drain_pod_selector %}--pod-selector '{{ drain_pod_selector }}'{% endif %}
   delegate_to: "{{ groups['kube-master'][0] }}"
   when:
     - drain_nodes

tests/testcases/040_check-network-adv.yml

@@ -73,7 +73,7 @@
       run_once: true
       when:
         - agents.content is defined
-        - agents.content != ''
+        - agents.content
         - agents.content[0] == '{'
 
     - name: Check netchecker status
@@ -120,7 +120,7 @@
       run_once: true
       when:
         - not agents.content == '{}'
-        - result.content != ''
+        - result.content
         - result.content[0] == '{'
 
     - debug: var=result