Make PyCharm role more idempotent

roles/pycharm/tasks/main.yml

 ---
+- name: check if PyCharm is installed
+  stat:
+    path: "/usr/local/pycharm/{{ pycharm_name | regex_replace('-professional') }}"
+  register: pycharm_installation
+
+- name: create temporary download directory
+  tempfile:
+    state: directory
+  register: tmpdir
+  when: not (pycharm_installation.stat.isdir is defined and pycharm_installation.stat.isdir)
+
 - name: download PyCharm
   get_url:
     url: "https://download-cf.jetbrains.com/python/{{ pycharm_name }}.tar.gz"
-    dest: /tmp/pycharm.tar.gz
+    dest: "{{ tmpdir.path }}/pycharm.tar.gz"
+  when: tmpdir.changed
 
-- name: create directory
+- name: Create directory
   become: yes
   file:
     path: /usr/local/pycharm
     state: directory
 
-- name: unarchive
+- name: Unarchive
   become: yes
   unarchive:
     src: /tmp/pycharm.tar.gz
@@ -18,7 +30,7 @@
     remote_src: yes
     creates: "/usr/local/pycharm/{{ pycharm_name | regex_replace('-professional') }}"
 
-- name: link PyCharm
+- name: Link PyCharm
   become: yes
   file:
     mode: o+rx