Usage of regular expressions (regex) on when_modified field

[dgteixeira]

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• I'd be willing to implement this feature (contributing guide)

Describe the user story
Hello, I'd like to use regular expressions in the when_modified field of autoplanning to find all files with a specific pattern.

Example

In my current situation, I have two different configs in my atlantis.yaml, in order to skip the refresh validation in specific files, as such:

version: 3
automerge: true
delete_source_branch_on_merge: true
projects:
- name: all-except-iam
  workspace: default
  dir: .
  apply_requirements: ["approved", "mergeable", "undiverged"]
  autoplan:
    enabled: true
    when_modified: ["!iam*.tf"]
- name: iam
  workspace: default
  dir: .
  apply_requirements: ["approved", "mergeable", "undiverged"]
  workflow: no_refresh
  autoplan:
    enabled: true
    when_modified: ["iam*.tf"]

However, this just targets all the files in this directory.
And, when I try to insert a regular expression (like below), the results do not match what I'm trying to achieve, because it just never triggers the project.

Describe the solution you'd like

What I would like to do is pass some regex, like below, to target all the tf files that do not start with an "i".

version: 3
automerge: true
delete_source_branch_on_merge: true
projects:
- name: all-except-iam
  workspace: default
  dir: .
  apply_requirements: ["approved", "mergeable", "undiverged"]
  autoplan:
    enabled: true
    when_modified: ["^[a-hj-z]{1}.*\\.tf$"]
- name: iam
  workspace: default
  dir: .
  apply_requirements: ["approved", "mergeable", "undiverged"]
  workflow: no_refresh
  autoplan:
    enabled: true
    when_modified: ["iam*.tf"]

Describe the drawbacks of your solution
Interpreting regular expressions might be unwanted in this workflow.

Describe alternatives you've considered

Listing all the files manually in the .yaml file

[nitrocode]

I believe its not a regex, its a glob.

See docs here https://www.runatlantis.io/docs/repo-level-atlantis-yaml.html#autoplan

What I would like to do is pass some regex, like below, to target all the tf files that do not start with an "i".

Please see the docker ignore syntax https://cratecode.com/info/dockerignore-usage

Since it doesn't support regex, it also may not be possible. Try the docs above and see if it helps.

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May I ask why you have some tf files you want to ignore in the same dir as tf files you want to include?