doc-exports/roles/generate_doc_patch/tasks/main.yaml

---
- name: Check base state for {{ doc_label }}
  stat:
    path: "{{ generate_doc_patch_base }}/{{ generate_doc_patch_base_location }}"
  register: base_stat

- name: Check new state for {{ doc_label }}
  stat:
    path: "{{ generate_doc_patch_base }}/{{ generate_doc_patch_new_location }}"
  register: new_stat

- name: Create reference {{ generate_doc_patch_repository }} repo
  file:
    path: "{{ generate_doc_patch_doc_location }}"
    state: "directory"
  when:
    - "base_stat.stat.exists"
    - "new_stat.stat.exists"
    - "generate_doc_patch_git_patch_location is defined"

- name: Initialize fake git repository
  command: "git init"
  args:
    chdir: "{{ generate_doc_patch_repo_location }}"
  when:
    - "base_stat.stat.exists"
    - "new_stat.stat.exists"
    - "generate_doc_patch_git_patch_location is defined"

- name: Copy {{ doc_label }} base version
  copy:
    src: "{{ generate_doc_patch_base }}/{{ generate_doc_patch_base_location }}/"
    dest: "{{ generate_doc_patch_doc_location }}"
    remote_src: true
  when:
    - "base_stat.stat.exists"
    - "new_stat.stat.exists"
    - "generate_doc_patch_git_patch_location is defined"

- name: Stage base version
  command: "git add ."
  args:
    chdir: "{{ generate_doc_patch_repo_location }}"
  when:
    - "base_stat.stat.exists"
    - "new_stat.stat.exists"
    - "generate_doc_patch_git_patch_location is defined"

- name: Commit base version
  command: "git commit -m 'base version'"
  args:
    chdir: "{{ generate_doc_patch_repo_location }}"
  when:
    - "base_stat.stat.exists"
    - "new_stat.stat.exists"
    - "generate_doc_patch_git_patch_location is defined"

- name: Drop {{ doc_label }} new version folder
  file:
    path: "{{ generate_doc_patch_doc_location }}"
    state: "absent"
  when:
    - "base_stat.stat.exists"
    - "new_stat.stat.exists"
    - "generate_doc_patch_git_patch_location is defined"

- name: Copy {{ doc_label }} new version
  copy:
    src: "{{ generate_doc_patch_base }}/{{ generate_doc_patch_new_location }}/"
    dest: "{{ generate_doc_patch_doc_location }}"
    remote_src: true
  when:
    - "base_stat.stat.exists"
    - "new_stat.stat.exists"
    - "generate_doc_patch_git_patch_location is defined"

- name: Stage updated version
  command: "git add ."
  args:
    chdir: "{{ generate_doc_patch_repo_location }}"
  when:
    - "base_stat.stat.exists"
    - "new_stat.stat.exists"
    - "generate_doc_patch_git_patch_location is defined"

- name: Perform git diff to see if there are changes
  command: "git diff --staged"
  register: diff_output
  args:
    chdir: "{{ generate_doc_patch_repo_location }}"
  when:
    - "base_stat.stat.exists"
    - "new_stat.stat.exists"
    - "generate_doc_patch_git_patch_location is defined"

- name: Commit updated version
  command: "git commit -m 'Update {{ doc_label }}'"
  args:
    chdir: "{{ generate_doc_patch_repo_location }}"
  when:
    - "base_stat.stat.exists"
    - "new_stat.stat.exists"
    - "diff_output.stdout != ''"
    - "generate_doc_patch_git_patch_location is defined"

- name: Generate {{ doc_label }} patch
  shell: "git format-patch --binary -1 --stdout > {{ generate_doc_patch_git_patch_location }}"
  args:
    chdir: "{{ generate_doc_patch_repo_location }}"
  when:
    - "base_stat.stat.exists"
    - "new_stat.stat.exists"
    - "diff_output.stdout != ''"
    - "generate_doc_patch_git_patch_location is defined"

- name: Generate {{ doc_label }} patch file
  shell: "diff -ruN {{ generate_doc_patch_base_location }} {{ generate_doc_patch_new_location }} > {{ generate_doc_patch_diff_patch_location }}"
  args:
    chdir: "{{ generate_doc_patch_base }}"
  register: diff_cmd
  failed_when: "diff_cmd.rc >= 2"
  changed_when: "diff_cmd.rc == 1"
  when:
    - "base_stat.stat.exists"
    - "new_stat.stat.exists"
    - "generate_doc_patch_diff_patch_location is defined"