paru: Fix installation

playbook.yml

@@ -127,13 +127,24 @@
           shell: /bin/bash
           system: true
 
-      - name: build paru on arch
+      - name: check if paru is already installed
         shell: |
           set -o errexit
 
           if pacman -Qi paru >/dev/null 2>&1; then
               exit 100
           fi
+          exit 0
+        args:
+          executable: /bin/bash
+        changed_when: false
+        check_mode: false
+        failed_when: result.rc not in (0, 100)
+        register: result
+
+      - name: build paru on arch
+        shell: |
+          set -o errexit
 
           mkdir -p /tmp/paru-build
           cd /tmp/paru-build
@@ -144,11 +155,9 @@
           makepkg
         args:
           executable: /bin/bash
-        register: result
         become: true # do not build as root!
         become_user: makepkg
-        changed_when: result.rc != 100
-        failed_when: result.rc not in (0, 100)
+        when: result.rc != 100
 
       - name: install paru
         shell: |