Ansible问题：基于Brew路径创建Java软链接提示源文件不存在

希望根据文件是否存在创建软链接，使用when/register实现逻辑但运行报错。Playbook内容如下：

- name: Check if /usr/local/bin/brew exists
  stat:
    path: /usr/local/bin/brew
  register: file_status_intel

- name: Check if /opt/homebrew/bin/brew exists
  stat:
    path: /opt/homebrew/bin/brew
  register: file_status_arm

- name: Create library symlink to Java for intel
  file:
    src: "/usr/local/bin/openjdk@11/libexec/openjdk.jdk"
    dest: "/Library/Java/JavaVirtualMachines/openjdk-11.jdk"
    state: link
  when: file_status_intel.stat.exists
  tags: selenium

- name: Create library symlink to Java for Mac M1, M2, M3
  file:
    src: "/opt/homebrew/opt/openjdk@11/libexec/openjdk.jdk"
    dest: "/Library/Java/JavaVirtualMachines/openjdk-11.jdk"
    state: link
  when: file_status_arm.stat.exists
  tags: selenium

执行后报错：

fatal: [tyr-mac-1-dev]: FAILED! => {"changed": false, "gid": 0, "group": "wheel", "mode": "0755", "msg": "src file does not exist, use \"force=yes\" if you really want to create the link: /usr/local/bin/openjdk@11/libexec/openjdk.jdk", "owner": "root", "path": "/Library/Java/JavaVirtualMachines/openjdk-11.jdk", "size": 45, "src": "/usr/local/bin/openjdk@11/libexec/openjdk.jdk", "state": "link", "uid": 0}

当前逻辑的核心错误是：判断的是brew的存在性，但实际创建软链接依赖的是openjdk@11的安装路径。brew存在不代表openjdk@11已经通过brew安装，所以即使file_status_intel.stat.exists为true，目标源文件/usr/local/bin/openjdk@11/libexec/openjdk.jdk可能根本不存在，导致Ansible报错。

方案1：直接检查软链接源文件的存在性 #

替换原来的brew检查，直接检查openjdk的目标路径，确保源文件存在再创建链接：

- name: Check if Intel OpenJDK 11 path exists
  stat:
    path: "/usr/local/bin/openjdk@11/libexec/openjdk.jdk"
  register: intel_jdk_exists

- name: Check if ARM OpenJDK 11 path exists
  stat:
    path: "/opt/homebrew/opt/openjdk@11/libexec/openjdk.jdk"
  register: arm_jdk_exists

- name: Create library symlink to Java for intel
  file:
    src: "/usr/local/bin/openjdk@11/libexec/openjdk.jdk"
    dest: "/Library/Java/JavaVirtualMachines/openjdk-11.jdk"
    state: link
  when: intel_jdk_exists.stat.exists
  tags: selenium

- name: Create library symlink to Java for Mac M1, M2, M3
  file:
    src: "/opt/homebrew/opt/openjdk@11/libexec/openjdk.jdk"
    dest: "/Library/Java/JavaVirtualMachines/openjdk-11.jdk"
    state: link
  when: arm_jdk_exists.stat.exists
  tags: selenium

方案2：保留brew判断，同时添加源文件存在条件 #

如果需要保留基于brew的架构判断，可在when条件中同时校验brew存在和源文件存在：

- name: Check if /usr/local/bin/brew exists
  stat:
    path: /usr/local/bin/brew
  register: file_status_intel

- name: Check if /opt/homebrew/bin/brew exists
  stat:
    path: /opt/homebrew/bin/brew
  register: file_status_arm

- name: Check Intel OpenJDK 11 path
  stat:
    path: "/usr/local/bin/openjdk@11/libexec/openjdk.jdk"
  register: intel_jdk_path

- name: Check ARM OpenJDK 11 path
  stat:
    path: "/opt/homebrew/opt/openjdk@11/libexec/openjdk.jdk"
  register: arm_jdk_path

- name: Create library symlink to Java for intel
  file:
    src: "/usr/local/bin/openjdk@11/libexec/openjdk.jdk"
    dest: "/Library/Java/JavaVirtualMachines/openjdk-11.jdk"
    state: link
  when: file_status_intel.stat.exists and intel_jdk_path.stat.exists
  tags: selenium

- name: Create library symlink to Java for Mac M1, M2, M3
  file:
    src: "/opt/homebrew/opt/openjdk@11/libexec/openjdk.jdk"
    dest: "/Library/Java/JavaVirtualMachines/openjdk-11.jdk"
    state: link
  when: file_status_arm.stat.exists and arm_jdk_path.stat.exists
  tags: selenium

方案3：使用force=yes（谨慎使用） #

如果确认即使源文件不存在也要创建链接（比如后续会手动部署源文件），可以添加force=yes参数，但这会跳过源文件存在性检查：

- name: Create library symlink to Java for intel
  file:
    src: "/usr/local/bin/openjdk@11/libexec/openjdk.jdk"
    dest: "/Library/Java/JavaVirtualMachines/openjdk-11.jdk"
    state: link
    force: yes
  when: file_status_intel.stat.exists
  tags: selenium

内容的提问来源于stack exchange，提问作者Cyanic Wolf