feat: add Prune and Delete as application level sync option

[MrFreezeex]

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My goal was mainly to add Prune/Delete=confirm as a sync option as the deletion confirmation acts on the whole Application already and it's way more convenient in our env to add it on the application level than as annotation on the resources actually deployed.

For consistency I also added Prune/Delete=false support there (separate commit).

And the UI option in when editing the sync policy for the Prune and Delete sync options

Closes https://github.com/argoproj/argo-cd/issues/23380

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Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests. :white_check_mark: Project coverage is 60.79%. Comparing base (492f712) to head (4720a94).

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #23370   +/-   ##
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  Coverage   60.78%   60.79%           
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  Files         351      351           
  Lines       60439    60468   +29     
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+ Hits        36737    36760   +23     
- Misses      20782    20786    +4     
- Partials     2920     2922    +2     

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[MrFreezeex]

Could you create an issue describing what the issue/enhancement is and why this change is needed and link it to this PR and your gitops-engine PR?

Sure! I just did that here: https://github.com/argoproj/argo-cd/issues/23380

[pjiang-dev]

The deletion part LGTM. Maybe helpful to add a screenshot or video of the sync option working. Thanks

[MrFreezeex]

Maybe helpful to add a screenshot or video of the sync option working. Thanks

Sure, will try to provide a video later today!

[MrFreezeex]

(rebasing for the go.mod conflict below and bumping the gitops-engine fork, no other code change)

[MrFreezeex]

@pjiang-dev here is the video (I had to fix a dumb typo https://github.com/argoproj/gitops-engine/compare/13f9343d366f59f29905dda9c8ef4e6257a67c67..03789b820ebec73de41af43a35493983c1832e01 in the gitops-engine so thanks for making me double check :see_no_evil:)

https://github.com/user-attachments/assets/4cad277a-b821-46cb-94e8-c28cc1235a82

[MrFreezeex]

FYI here is the yaml that I am using in the video above:

---
apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  name: test-prune-confirm
  finalizers:
    - resources-finalizer.argocd.argoproj.io
spec:
  project: default
  source:
    repoURL: https://github.com/MrFreezeex/test-argocd-confirm.git
    targetRevision: "testsyncopt"
    path: test-prune
    # path: test-empty
  destination:
    name: in-cluster
    namespace: test-prune-confirm
  syncPolicy:
    automated: {}
    syncOptions:
      - Prune=confirm
---
apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  name: test-prune-false
  finalizers:
    - resources-finalizer.argocd.argoproj.io
spec:
  project: default
  source:
    repoURL: https://github.com/MrFreezeex/test-argocd-confirm.git
    targetRevision: "testsyncopt"
    path: test-prune
    # path: test-empty
  destination:
    name: in-cluster
    namespace: test-prune-false
  syncPolicy:
    automated: {}
    syncOptions:
      - Prune=false
---
apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  name: test-delete-confirm
  finalizers:
    - resources-finalizer.argocd.argoproj.io
spec:
  project: default
  source:
    repoURL: https://github.com/MrFreezeex/test-argocd-confirm.git
    targetRevision: "testsyncopt"
    path: test-delete
  destination:
    name: in-cluster
    namespace: test-delete-confirm
  syncPolicy:
    automated: {}
    syncOptions:
      - Delete=confirm
---
apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  name: test-delete-false
  finalizers:
    - resources-finalizer.argocd.argoproj.io
spec:
  project: default
  source:
    repoURL: https://github.com/MrFreezeex/test-argocd-confirm.git
    targetRevision: "testsyncopt"
    path: test-delete
  destination:
    name: in-cluster
    namespace: test-delete-false
  syncPolicy:
    automated: {}
    syncOptions:
      - Delete=false

[MrFreezeex]

Hi @agaudreault, kind reminder about this PR, would love to have your updated input on the matter whenever you have time do so :pray:

[shearn89]

Would also be ace to see this merged - just upgraded Argo on all our clusters only to find out that the option isn't there yet, just the annotation on resources 😁

[sharovmerk]

+1 I really need it

[MrFreezeex]

@agaudreault I added the change for the resource precedence as you suggested.

I also included the fix I did here https://github.com/argoproj/argo-cd/pull/23326 in a separate commit as this PR changed a bit the code related to that and the other PR won't really be applicable anymore. We could still keep the other fix PR as a cherry pick to the release branches if necessary. Although AFAIU no one complained about this bug and it's something that I discovered while developing this so it might be just fine to not cherry pick it :man_shrugging:.

Let me know WDYT of this new version :pray:

[MrFreezeex]

Hi @agaudreault small reminder about this PR in case it drop of your radar :pray: