some WIP for adding bitbucket mesh support

roles/bitbucket_mesh/defaults/main.yml

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+mesh_install_dir: /opt/atlassian/mesh
+bitbucket_mesh_maven_repo: https://packages.atlassian.com/maven-external
+bitbucket_mesh_version: "1.3.1"

roles/bitbucket_mesh/tasks/main.yml

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+---
+
+- name: set up the bitbucket mesh group
+  ansible.builtin.group:
+    name: "{{ atl_product_user }}"
+    gid: 1001
+    state: present
+
+- name: set up the bitbucket mesh user
+  ansible.builtin.user:
+    name: "{{ atl_product_user }}"
+    uid: 1001
+    state: present
+    comment: "mesh_runtime_user"
+    groups: "{{ atl_product_user }}"
+    home: "{{ mesh_install_dir }}"
+
+- name: Create Bitbucket dirs if necessary
+  ansible.builtin.file:
+    path: "{{ item }}"
+    owner: "{{ atl_product_user }}"
+    group: "{{ atl_product_user }}"
+    mode: 0750
+    state: directory
+  with_items:
+    - "{{ atl_home_base }}/{{ atl_product_edition }}"
+    - "{{ mesh_install_dir }}"
+
+- name: Template out the mesh service file
+  ansible.builtin.template:
+    src: mesh.service.j2
+    dest: "/usr/lib/systemd/system/mesh.service"
+    owner: "root"
+    group: "root"
+    mode: 0740
+
+- name: download the mesh distribution using maven
+  community.general.maven_artifact:
+    group_id: "com.atlassian.bitbucket.mesh"
+    artifact_id: "mesh-distribution"
+    extension: "tar.gz"
+    repository_url: "{{ bitbucket_mesh_maven_repo }}"
+    dest: "{{ mesh_install_dir }}"
+    mode: "0644"
+    owner: "{{ atl_product_user }}"
+    group: "{{ atl_product_user }}"
+  register: maven_download
+
+- name: debug
+  debug:
+    var: maven_download

roles/bitbucket_mesh/templates/mesh.service.j2

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+[Unit]
+Description=Atlassian bitbucket-mesh
+After=syslog.target network-online.target
+
+[Service]
+Type=forking
+UMask=0027
+User={{ atl_product_user }}
+Group={{ atl_product_user }}
+StandardOutput=journal+console
+StandardError=journal+console
+LimitNOFILE=65336
+Environment=MESH_HOME={{ atl_home_base }}/{{ atl_product_edition }}
+Environment=JAVA_HOME=/usr/lib/jvm/java
+Environment=JRE_HOME=/usr/lib/jvm/java
+Environment=JMX_REMOTE_AUTH=password
+Environment=JMX_PASSWORD_FILE=/var/atlassian/application-data/jmx/jmx.access
+Environment="JVM_SUPPORT_RECOMMENDED_ARGS=-Dmesh.enabled=true -Dplugin.bitbucket-git.mesh.sidecar.child-process=false -Dcom.sun.management.jmxremote.port=4444 -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath={{ atl_home_base }}/{{ atl_product_edition }}/log"
+Environment=JVM_MAXIMUM_MEMORY={{ atl_jvm_heap }}
+PIDFile={{ atl_home_base }}/{{ atl_product_edition }}/log/mesh.pid
+PassEnvironment=JMX_REMOTE_AUTH JMX_PASSWORD_FILE JAVA_HOME
+ExecStart={{ mesh_install_dir }}/current/bin/start-mesh.sh
+ExecStop={{ mesh_install_dir }}/current/bin/stop-mesh.sh
+
+[Install]
+WantedBy=multi-user.target