feat: Add option to set shell executable

Covered in the following GitHub issue:

    #5

meta/argument_specs.yaml

@@ -39,3 +39,11 @@ argument_specs:
         required: false
         description: >-
           Set the package global version.
+
+      asdf_plugin_shell_executable:
+        type: str
+        required: false
+        description: >-
+          Absolute path to a shell executable that the Ansible Shell module
+          tasks should use for working with asdf. If this option is unset, this
+          the module defaults will be used.

tasks/main.yml

@@ -1,31 +1,91 @@
+# ------------------------------------------------------------------------------
+# Add plugin
+
+
 - name: "{{ asdf_plugin_name }} : Add plugin"
+  when: asdf_plugin_shell_executable is undefined
   ansible.builtin.command: >-
     asdf plugin add {{ asdf_plugin_name }} {{ asdf_plugin_git_url }}
   register: task
   failed_when: task.rc >= 1 and 'already added' not in task.stderr
   changed_when: task.rc == 0
 
+- name: "{{ asdf_plugin_name }} : Add plugin"
+  when: asdf_plugin_shell_executable is defined
+  ansible.builtin.shell: >-
+    asdf plugin add {{ asdf_plugin_name }} {{ asdf_plugin_git_url }}
+  args: {executable: "{{ asdf_plugin_shell_executable }}"}
+  register: task
+  failed_when: task.rc >= 1 and 'already added' not in task.stderr
+  changed_when: task.rc == 0
+
+
+# ------------------------------------------------------------------------------
+# Checkout plugin repo at ref
+
+
 - name: "{{ asdf_plugin_name }} : Checkout plugin repo at ref"
-  when: asdf_plugin_git_ref is defined
+  when: asdf_plugin_shell_executable is undefined and asdf_plugin_git_ref is defined
   ansible.builtin.command: >-
     asdf plugin update {{ asdf_plugin_name }} {{ asdf_plugin_git_ref }}
   register: task
   failed_when: task.rc > 0 or 'fatal' in task.stdout or 'error' in task.stdout
   changed_when: false
 
+- name: "{{ asdf_plugin_name }} : Checkout plugin repo at ref"
+  when: asdf_plugin_shell_executable is defined and asdf_plugin_git_ref is defined
+  ansible.builtin.shell: >-
+    asdf plugin update {{ asdf_plugin_name }} {{ asdf_plugin_git_ref }}
+  args: {executable: "{{ asdf_plugin_shell_executable }}"}
+  register: task
+  failed_when: task.rc > 0 or 'fatal' in task.stdout or 'error' in task.stdout
+  changed_when: false
+
+
+# ------------------------------------------------------------------------------
+# Install package
+
+
 - name: "{{ asdf_plugin_name }} : Install package {{ asdf_plugin_package_versions | default('SKIP') }}"
-  when: asdf_plugin_package_versions is defined
+  when: asdf_plugin_shell_executable is undefined and asdf_plugin_package_versions is defined
   ansible.builtin.command: >-
     asdf install {{ asdf_plugin_name }} {{ item }}
   loop: "{{ asdf_plugin_package_versions }}"
   register: task
   failed_when: task.rc > 0
   changed_when: false
 
-- name: "{{ asdf_plugin_name }} : Set the global version to {{ asdf_plugin_package_version_global | default('SKIP') }}"
-  when: asdf_plugin_package_version_global is defined
+- name: "{{ asdf_plugin_name }} : Install package {{ asdf_plugin_package_versions | default('SKIP') }}"
+  when: asdf_plugin_shell_executable is defined and asdf_plugin_package_versions is defined
+  ansible.builtin.shell: >-
+    asdf install {{ asdf_plugin_name }} {{ item }}
+  loop: "{{ asdf_plugin_package_versions }}"
+  args: {executable: "{{ asdf_plugin_shell_executable }}"}
+  register: task
+  failed_when: task.rc > 0
+  changed_when: false
+
+
+# ------------------------------------------------------------------------------
+# Set the global version
+
+
+- name: "{{ asdf_plugin_name }} : Set global version to {{ asdf_plugin_package_version_global | default('SKIP') }}"
+  when: asdf_plugin_shell_executable is undefined and asdf_plugin_package_version_global is defined
   ansible.builtin.command: >-
     asdf global {{ asdf_plugin_name }} {{ asdf_plugin_package_version_global }}
   register: task
   failed_when: task.rc > 0
   changed_when: false
+
+- name: "{{ asdf_plugin_name }} : Set global version to {{ asdf_plugin_package_version_global | default('SKIP') }}"
+  when: asdf_plugin_shell_executable is defined and asdf_plugin_package_version_global is defined
+  ansible.builtin.shell: >-
+    asdf global {{ asdf_plugin_name }} {{ asdf_plugin_package_version_global }}
+  args: {executable: "{{ asdf_plugin_shell_executable }}"}
+  register: task
+  failed_when: task.rc > 0
+  changed_when: false
+
+
+# ------------------------------------------------------------------------------