Fix incomplete plugin directory deletion on uninstall

[Jack251970]

• Added TryDeleteDirectoryRobust to delete directories with retries and remove read-only attributes; returns whether deletion fully succeeded.
• Updated PluginConfig to use the robust deletion; if partial, recreates the NeedDelete marker and logs a warning so deletion retries on next startup.
• Added unit tests for non-existent, empty, nested, files-present, and read-only scenarios.

Test:

• A plugin with one locked file in its plugin directory will be delete after lock is released.

[coderabbitai]

📝 Walkthrough

Walkthrough

Adds a robust directory-deletion routine and switches plugin cleanup to use it; if deletion partially fails, a marker file is written and a warning is logged to retry cleanup on next startup.

Changes

Cohort / File(s)	Summary
Plugin deletion flow Flow.Launcher.Core/Plugin/PluginConfig.cs	Replaces direct Directory.Delete(directory, true) with FilesFolders.TryDeleteDirectoryRobust(directory, maxRetries: 3, retryDelayMs: 200); logs a warning and writes DataLocation.PluginDeleteFile marker when deletion is incomplete.
Deletion utility Flow.Launcher.Plugin/SharedCommands/FilesFolders.cs	Adds public TryDeleteDirectoryRobust(string path, int maxRetries = 3, int retryDelayMs = 100) that retries per-file deletion (handles read-only attributes, IO/Unauthorized exceptions), removes empty subdirectories deep→shallow, and returns bool indicating full deletion success.
Tests Flow.Launcher.Test/FilesFoldersTest.cs	Adds tests covering non-existent dirs, empty dirs, files, nested structures, and read-only file handling to validate TryDeleteDirectoryRobust.

Sequence Diagram

sequenceDiagram
    participant PC as PluginConfig
    participant FD as FilesFolders.TryDeleteDirectoryRobust
    participant FS as File System
    participant DL as DataLocation
    participant PA as PublicApi (Logger)

    PC->>FD: request delete directory(path)
    FD->>FS: enumerate files & subdirs
    loop per-file retries
        FD->>FS: remove read-only attr if present
        FD->>FS: attempt delete file
        alt delete succeeds
            FS-->>FD: file removed
        else retryable failure
            FD-->>FS: wait retryDelay and retry
        else non-retryable failure
            FS-->>FD: failure
        end
    end
    FD->>FS: delete empty subdirectories (deep → shallow)
    FD->>FS: delete root directory
    alt all deleted
        FS-->>FD: success
        FD-->>PC: return true
    else partial/failure
        FS-->>FD: partial/failure
        FD-->>PC: return false
    end

    alt deletion returned false
        PC->>DL: create PluginDeleteFile marker in directory (if missing)
        PC->>PA: LogWarn about deferred deletion
    end

Loading

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~30 minutes

Possibly related PRs

• Upgrade Nuget Packages #3982: Related changes to plugin deletion flow and DataLocation.PluginDeleteFile usage.

Suggested reviewers

• jjw24
• taooceros

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 44.44% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'Fix incomplete plugin directory deletion on uninstall' accurately summarizes the main change—implementing robust directory deletion to handle incomplete plugin directory removal during uninstallation.
Description check	✅ Passed	The description clearly relates to the changeset, detailing the addition of TryDeleteDirectoryRobust, its integration into PluginConfig, comprehensive unit tests, and expected behavior with locked files.

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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[Copilot]

Pull request overview

This pull request enhances plugin directory deletion in Flow Launcher by introducing a robust deletion mechanism that handles locked and read-only files more gracefully. The changes ensure that incomplete deletions are retried on subsequent application startups.

Changes:

• Added TryDeleteDirectoryRobust method with retry logic for handling locked/read-only files during deletion
• Updated plugin configuration to use the new robust deletion method and implement marker file recreation for retry logic
• Added comprehensive unit tests covering various deletion scenarios

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 4 comments.

File	Description
Flow.Launcher.Plugin/SharedCommands/FilesFolders.cs	Implements new TryDeleteDirectoryRobust method with retry logic and read-only file handling
Flow.Launcher.Core/Plugin/PluginConfig.cs	Updates deletion logic to use robust method, adds marker file recreation and warning logging for incomplete deletions
Flow.Launcher.Test/FilesFoldersTest.cs	Adds unit tests for various deletion scenarios including empty directories, files, nested structures, and read-only files

---

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[cubic-dev-ai]

1 issue found across 3 files

Prompt for AI agents (all issues)

Check if these issues are valid — if so, understand the root cause of each and fix them.


<file name="Flow.Launcher.Plugin/SharedCommands/FilesFolders.cs">

<violation number="1" location="Flow.Launcher.Plugin/SharedCommands/FilesFolders.cs:209">
P2: `Directory.Delete` will throw an `IOException` if the directory itself is marked ReadOnly. The current implementation clears the ReadOnly attribute for files but not for directories. If a directory is ReadOnly, this method will permanently fail to delete it, causing infinite retries on subsequent startups.</violation>
</file>

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[github-actions]

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