tomcat - ansible jar check if already installed -


i'm having jar file installs tomcat website. have following tasks download jar file, install jar file , delete jar file. want ansible tell installed instead of downloading , trying install again. how can achieve such?

- name: downloading installer   get_url:   url: http://[url]/installfile.jar   dest: "/opt"  - name: installing jar file   shell: java -jar "/opt/installfile.jar"  - name: removing installer   file:   state: absent   path: "/opt/installfile.jar"

you can use creates arg on install task @ least, java program run when file not yet exist. ansible create such file first time task runs.

something like:

- name: installing jar file   shell: java -jar "/opt/installfile.jar"   args:     creates: /opt/installfile-check

or if want condition 3 tasks run when tomcat not installed, need first run program checks whether installed , register result in variable other tasks can use determine if need run using when. 

- name: check see if tomcat installed   shell: "command --that --checks" # example,   register: tomcat_is_installed

you can include tomcat playbook when not installed:

- name: playbook included when tomcat not installed   include: tomcat-playbook.yml   when: tomcat_is_installed.rc != 0

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