test for existing ucx_info before attempting to compile ucx

roles/slurm-common/tasks/installSlurmFromSource.yml

-- name: define ucx_src_url
-  set_fact:
-    ucx_src_url: "http://consistency0/src/ucx_1_8_0.tar.gz"
-  when: ucx_src_url is not defined
 
 - name: define slurm_src_url
   set_fact:
     slurm_src_url: "http://consistency0/src/slurm-{{ slurm_version }}.tar.bz2"
   when: slurm_src_url is not defined
 
-- name: Create ucx directory if it does not exist
-  file:
-    path: "{{ ucx_src_dir | dirname }}"
-    state: directory
-    owner: "{{ ansible_user }}"
-    group: root
-    mode: u=rwx,g=rx,o=rx
-  become: true
 
 - name: remove all install
   file:
@@ -54,50 +42,70 @@
   stat: path="{{ slurm_dir }}/bin/srun"
   register: stat_srun
 
+- name: define ucx_dir
+  set_fact:
+    ucx_dir: "/usr"
+  when: ucx_dir is not defined
+
 - name: stat ucx
   stat: 
-    path: "{{ ucx_dir }}"
+    path: "{{ ucx_dir }}/bin/ucx_info"
   register: stat_ucx
 
-- name: Create ucx directory if it does not exist
-  file:
-    path: "{{ ucx_dir }}"
-    state: directory
-    owner: root
-    group: root
-    mode: u=rwx,g=rx,o=rx
-  become: true
-  when: not stat_ucx.stat.exists
-
-- name: download ucx
-  get_url:
-    url: "{{ ucx_src_url }}"
-    checksum: "{{ ucx_src_checksum }}"
-    dest: "{{ ucx_src_dir | dirname }}/ucx_src"
-  when: ucx_src_checksum is defined
-- name: download ucx
-  get_url:
-    url: "{{ ucx_src_url }}"
-    dest: "{{ ucx_src_dir | dirname }}/ucx_src"
-  when: ucx_src_checksum is not defined
-    
-- name: unarchive ucx
-  unarchive:
-  args:
-    src: "{{ ucx_src_dir | dirname }}/ucx_src"
-    copy: no
-    dest: "{{ ucx_src_dir | dirname }}"
-    creates: "{{ ucx_src_dir }}"
-  become: true
-  register: newucx
-
-- name: install ucx
-  shell: "./contrib/configure-release --prefix={{ ucx_dir }} && make -j8 && make install"
-  args:
-    chdir: "{{ ucx_src_dir }}"
-    creates: "{{ ucx_dir }}/bin/ucx_info"
-  become: true
-    #  when: not stat_ucx.stat.exists
+- block:
+  - name: define ucx_src_url
+    set_fact:
+      ucx_src_url: "http://consistency0/src/ucx_1_8_0.tar.gz"
+    when: ucx_src_url is not defined
+
+  - name: Create ucx directory if it does not exist
+    file:
+      path: "{{ ucx_src_dir | dirname }}"
+      state: directory
+      owner: "{{ ansible_user }}"
+      group: root
+      mode: u=rwx,g=rx,o=rx
+    become: true
+
+  - name: Create ucx directory if it does not exist
+    file:
+      path: "{{ ucx_dir }}"
+      state: directory
+      owner: root
+      group: root
+      mode: u=rwx,g=rx,o=rx
+    become: true
+    when: not stat_ucx.stat.exists
+
+  - name: download ucx
+    get_url:
+      url: "{{ ucx_src_url }}"
+      checksum: "{{ ucx_src_checksum }}"
+      dest: "{{ ucx_src_dir | dirname }}/ucx_src"
+    when: ucx_src_checksum is defined
+  - name: download ucx
+    get_url:
+      url: "{{ ucx_src_url }}"
+      dest: "{{ ucx_src_dir | dirname }}/ucx_src"
+    when: ucx_src_checksum is not defined
+      
+  - name: unarchive ucx
+    unarchive:
+    args:
+      src: "{{ ucx_src_dir | dirname }}/ucx_src"
+      copy: no
+      dest: "{{ ucx_src_dir | dirname }}"
+      creates: "{{ ucx_src_dir }}"
+    become: true
+    register: newucx
+
+  - name: install ucx
+    shell: "./contrib/configure-release --prefix={{ ucx_dir }} && make -j8 && make install"
+    args:
+      chdir: "{{ ucx_src_dir }}"
+      creates: "{{ ucx_dir }}/bin/ucx_info"
+    become: true
+      #  when: not stat_ucx.stat.exists
 
 - name: configure slurm centos
   command: "{{ slurm_src_dir }}/configure --prefix={{ slurm_dir }} --with-munge={{ munge_dir }} --enable-pam --with-pmix={{ pmix_dir }} --with-ucx={{ ucx_dir }}"