Fix mysql_user on_new_username IndexError (#642)

* fix tuple indexerror when no accounts are found

* Fix tests for update_password not executed

* Add test for case where existing user have different password

* lint to prevent warning about jinja templating in when clause

* Refactor get_existing_authentication to return a list of all row found

Previously we were returning only the first row found. We need to be
able to see if there is a difference in the existing passwords.

* Refactor host option to be optional

This make it possible to use the same method from mysql_user to help
update_password retrieve existing password for all account with the same
username independently of their hostname. And from mysql_info to get
the password of a specif user using WHERE user = '' AND host = ''

* Add change log fragment

* Add link to the PR in the change log

* lint for ansible devel

* Fix templating type error could not cconvert to bool with ansible devel

* Revert changes made for ansible-devel that broke tests for Ansible 2.15

* Revert changes made for ansible-devel that broke tests

* Cut unnecessary set, uniqueness is ensured by the group_by in the query

* Cut auth plugin from returned values when multiple existing auths exists

Discussed here:
https://github.com/ansible-collections/community.mysql/pull/642/files#r1649720519

* fix convertion of list(dict) to list(tuple)

* Fix test for empty password on MySQL 8+

tests/integration/targets/test_mysql_variables/tasks/issue-28.yml

@@ -1,8 +1,11 @@
 ---
 - name: set fact tls_enabled
-  command: "{{ mysql_command }} \"-e SHOW VARIABLES LIKE 'have_ssl';\""
+  ansible.builtin.command:
+    cmd: "{{ mysql_command }} \"-e SHOW VARIABLES LIKE 'have_ssl';\""
   register: result
-- set_fact:
+
+- name: Set tls_enabled fact
+  ansible.builtin.set_fact:
     tls_enabled: "{{ 'YES' in result.stdout | bool | default('false', true) }}"
 
 - vars:
@@ -16,21 +19,21 @@
 
     # ============================================================
     - name: get server certificate
-      copy:
+      ansible.builtin.copy:
         content: "{{ lookup('pipe', \"openssl s_client -starttls mysql -connect localhost:3307 -showcerts 2>/dev/null </dev/null |  sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p'\") }}"
         dest: /tmp/cert.pem
       delegate_to: localhost
 
     - name: Drop mysql user if exists
-      mysql_user:
+      community.mysql.mysql_user:
         <<: *mysql_params
         name: '{{ user_name_1 }}'
         host_all: true
         state: absent
-      ignore_errors: yes
+      ignore_errors: true
 
     - name: create user with ssl requirement
-      mysql_user:
+      community.mysql.mysql_user:
         <<: *mysql_params
         name: "{{ user_name_1 }}"
         host: '%'
@@ -40,7 +43,7 @@
           SSL:
 
     - name: attempt connection with newly created user (expect failure)
-      mysql_variables:
+      community.mysql.mysql_variables:
         variable: '{{ set_name }}'
         login_user: '{{ user_name_1 }}'
         login_password: '{{ user_password_1 }}'
@@ -48,22 +51,24 @@
         login_port: '{{ mysql_primary_port }}'
         ca_cert: /tmp/cert.pem
       register: result
-      ignore_errors: yes
+      ignore_errors: true
 
-    - assert:
+    - name: Assert that result is failed for pymysql
+      ansible.builtin.assert:
         that:
           - result is failed
       when:
         - connector_name == 'pymysql'
 
-    - assert:
+    - name: Assert that result is success for mysqlclient
+      ansible.builtin.assert:
         that:
           - result is succeeded
       when:
         - connector_name != 'pymysql'
 
     - name: attempt connection with newly created user ignoring hostname
-      mysql_variables:
+      community.mysql.mysql_variables:
         variable: '{{ set_name }}'
         login_user: '{{ user_name_1 }}'
         login_password: '{{ user_password_1 }}'
@@ -72,14 +77,12 @@
         ca_cert: /tmp/cert.pem
         check_hostname: no
       register: result
-      ignore_errors: yes
-
-    - assert:
-        that:
-          - result is succeeded or 'pymysql >= 0.7.11 is required' in result.msg
+      ignore_errors: true
+      failed_when:
+        - result is failed or 'pymysql >= 0.7.11 is required' not in result.msg
 
     - name: Drop mysql user
-      mysql_user:
+      community.mysql.mysql_user:
         <<: *mysql_params
         name: '{{ user_name_1 }}'
         host_all: true

tests/integration/targets/test_mysql_variables/tasks/mysql_variables.yml

@@ -47,8 +47,8 @@
     # Verify mysql_variable successfully updates a variable (issue:4568)
     #
     - set_fact:
-         set_name: 'delay_key_write'
-         set_value: 'ON'
+        set_name: 'delay_key_write'
+        set_value: 'ON'
 
     - name: set mysql variable
       mysql_variables:
@@ -74,8 +74,8 @@
     # Verify mysql_variable successfully updates a variable using single quotes
     #
     - set_fact:
-         set_name: 'wait_timeout'
-         set_value: '300'
+        set_name: 'wait_timeout'
+        set_value: '300'
 
     - name: set mysql variable to a temp value
       mysql_variables:
@@ -105,8 +105,8 @@
     # Verify mysql_variable successfully updates a variable using double quotes
     #
     - set_fact:
-         set_name: "wait_timeout"
-         set_value: "400"
+        set_name: "wait_timeout"
+        set_value: "400"
 
     - name: set mysql variable to a temp value
       mysql_variables:
@@ -132,8 +132,8 @@
     # Verify mysql_variable successfully updates a variable using no quotes
     #
     - set_fact:
-         set_name: wait_timeout
-         set_value: 500
+        set_name: wait_timeout
+        set_value: 500
 
     - name: set mysql variable to a temp value
       mysql_variables:
@@ -251,8 +251,8 @@
     # Verify mysql_variable works with the login_user and login_password parameters
     #
     - set_fact:
-         set_name: wait_timeout
-         set_value: 77
+        set_name: wait_timeout
+        set_value: 77
 
     - name: query mysql_variable using login_user and password_password
       mysql_variables:
@@ -291,8 +291,8 @@
     # Verify mysql_variable fails with an incorrect login_password parameter
     #
     - set_fact:
-         set_name: connect_timeout
-         set_value: 10
+        set_name: connect_timeout
+        set_value: 10
 
     - name: query mysql_variable using incorrect login_password
       mysql_variables: