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with_filetree:: use splitext for compatibility with template: (#2285)

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* with_filetree: use splitext for compatibility with template

The example code given deploys files with their .j2 extensions intact, which is probably not what you want.

* Explain how templates interact with splitext|first

* Update plugins/lookup/filetree.py

Co-authored-by: Felix Fontein <felix@fontein.de>

* Don't encourage setting the mode of symlinks

On ext4, maybe most filesystems, symlinks always have the artificial mode of 0777, and `chmod $mode $symlink` *writes through* the symlink to its target file.

An effect of this is that if you deploy a file and a symlink to it (e.g. this common situation: /etc/nginx/sites-available/default and /etc/nginx/sites-enabled/default -> ../sites-available/default) then `with_filetree` will forever first deploy the file with the right mode, then corrupt its mode to 0777, and every redeploy will see a change to fix, forever in a loop.

Probably `file:` should refuse `mode:` on `state: link`s, but in the meantime, avoid recommending it in `filetree`

* Use `follow: false` instead of just the mode.

This should be more cross-compatible.

https://github.com/ansible-collections/community.general/pull/2285#discussion_r616571873

* Update plugins/lookup/filetree.py

Co-authored-by: Felix Fontein <felix@fontein.de>
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Nick 2021-04-21 08:04:46 -04:00 committed by GitHub
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plugins/lookup/filetree.py
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@ -31,7 +31,9 @@ EXAMPLES = r"""
- name: Template files (explicitly skip directories in order to use the 'src' attribute)
ansible.builtin.template:
src: '{{ item.src }}'
dest: /web/{{ item.path }}
# Your template files should be stored with a .j2 file extension,
# but should not be deployed with it. splitext|first removes it.
dest: /web/{{ item.path | splitext | first }}
mode: '{{ item.mode }}'
with_community.general.filetree: web/
when: item.state == 'file'
@ -41,6 +43,7 @@ EXAMPLES = r"""
src: '{{ item.src }}'
dest: /web/{{ item.path }}
state: link
follow: false # avoid corrupting target files if the link already exists
force: yes
mode: '{{ item.mode }}'
with_community.general.filetree: web/