GitAuto: [FEATURE] Add model-aware response cache service with AppData storage and 30-day TTL

[gitauto-ai]

Resolves #222

Test these changes locally

git fetch origin
git checkout gitauto/issue-222-20250427-035619
git pull origin gitauto/issue-222-20250427-035619

Summary by Sourcery

Add a caching layer for generated commit messages to avoid re-generating responses for identical inputs.

New Features:

• Introduce a service to cache commit message generation results.
• Implement file-based caching using the user's application data folder.
• Cache entries are specific to the AI model used and expire after 30 days.
• Validate cache integrity using checksums.

[korbit-ai]

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[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request introduces a model-aware response cache service for commit messages. It implements caching using a file-based provider that stores data in the user's application data directory with a 30-day time-to-live.

No diagrams generated as the changes look simple and do not need a visual representation.

File-Level Changes

Change	Details	Files
Introduce an interface for cache providers.	Define methods for generating a cache key hash, loading a cached entry, and saving a cache entry.	Src/AiCommitMessage/Services/Cache/ICacheProvider.cs
Implement a file-based cache provider.	Store cache files in the user's application data directory or a configurable path. Generate cache keys using SHA256 hashing of model, branch, author message, and diff. Load cached responses from JSON files, validating against model, timestamp (30-day TTL), and checksum. Delete expired or invalid cache files upon load attempt. Save responses as JSON files including model, response, checksum, and timestamp. Compute checksums for cached content using SHA256.	Src/AiCommitMessage/Services/Cache/FileCacheProvider.cs
Create a service to manage commit message caching.	Depend on the ICacheProvider interface. Generate a cache key based on input parameters. Attempt to load the response from the cache. If not found, generate the response using a provided function. Save the generated response to the cache. Print console messages indicating cache hit or miss.	Src/AiCommitMessage/Services/Cache/CommitMessageCacheService.cs

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#222	Implement a reusable and testable caching layer for commit message generation results from the OpenAI API.	✅
#222	Store cached responses in a platform-agnostic location under the user's AppData/config directory, with optional override via COMMIT_CACHE_PATH env var.	✅
#222	Use a model-aware SHA256 hash for lookup, include a checksum for validation, and apply a 30-day TTL.	✅

Possibly linked issues

• [FEATURE] Add model-aware response cache service with AppData storage and 30-day TTL #222: PR implements the ICacheProvider, FileCacheProvider, and CommitMessageCacheService as detailed in the issue.

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[sourcery-ai]

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[deepsource-io]

Here's the code health analysis summary for commits e284767..9d240dc. View details on DeepSource ↗.

Analysis Summary

Analyzer	Status	Summary	Link
Test coverage	❌ Failure	❗ 2 occurences introduced	View Check ↗
Secrets	✅ Success		View Check ↗
Docker	✅ Success		View Check ↗
C#	❌ Failure	❗ 3 occurences introduced	View Check ↗

Code Coverage Report

Metric	Aggregate	C#
Branch Coverage	44.5% (down 7.1% from main)	44.5% (down 7.1% from main)
Condition Coverage	44.5% (down 7.1% from main)	44.5% (down 7.1% from main)
Composite Coverage	45.6% (down 7.3% from main)	45.6% (down 7.3% from main)
Line Coverage	45.9% (down 7.4% from main)	45.9% (down 7.4% from main)
New Branch Coverage	0%	0%
New Condition Coverage	0%	0%
New Composite Coverage	0%	0%
New Line Coverage	0%	0%

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💡 If you’re a repository administrator, you can configure the quality gates from the settings.

[github-actions]

🔥 Formatting issues detected

File	Line
./Src/AiCommitMessage/Services/Cache/FileCacheProvider.cs	27

⚡ Please run dotnet csharpier . locally to fix the formatting issues.

[guibranco]

@gstraccini csharpier

[gstraccini]

Running CSharpier on this branch! 🔧

[gstraccini]

✅ CSharpier result:

Error ./Src/AiCommitMessage/Services/Cache/CommitMessageCacheService.cs - Was not formatted.
  ----------------------------- Expected: Around Line 20 -----------------------------
              string diff,
              Func<Task<string>> generateFunc
          )
  ----------------------------- Actual: Around Line 20 -----------------------------
              string diff,
              Func<Task<string>> generateFunc)
          {
  
Error ./Src/AiCommitMessage/Services/Cache/FileCacheProvider.cs - Was not formatted.
  ----------------------------- Expected: Around Line 9 -----------------------------
      {
          private record CachedResponse(
              string Model,
  ----------------------------- Actual: Around Line 9 -----------------------------
      {
          private record CachedResponse(string Model, string Response, string Checksum, DateTime Timestamp);
  
  
Formatted 23 files in 551ms.

[guibranco]

@gstraccini csharpier

[gstraccini]

Running CSharpier on this branch! 🔧

[gstraccini]

✅ CSharpier result:

Error ./Src/AiCommitMessage/Services/Cache/FileCacheProvider.cs - Was not formatted.
  ----------------------------- Expected: Around Line 27 -----------------------------
              {
                  var baseDir = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
                  if (string.IsNullOrWhiteSpace(baseDir))
  ----------------------------- Actual: Around Line 27 -----------------------------
              {
                  var baseDir = Environment.GetFolderPath(
                      Environment.SpecialFolder.ApplicationData
  
Formatted 23 files in 474ms.

[gstraccini]

ℹ️ Workflow Template updated!

A new workflow template has been added: .github/workflows/linter.yml

[guibranco]

@gstraccini review

[gstraccini]

Reviewing this pull request! 👀
Mergeable state: blocked

Commits included:
SHA: 4edb4d6cd3eef73b57a14277af46eb83455c3d0a
SHA: 33734385b3d60f9668137c52292485756e4477ad
SHA: ea1bf7aa5fc687a9a91a9b224c258154034ae774
SHA: 3acf216d4110dd11e1318c52cd756f48104c677c
SHA: db0270b2a1edb7be188161a8a2d88e6d4e16387d
SHA: 7fc7ef892e3d5fce859a4841fea3017feb312ed7
SHA: fd6329a1232704255016e8eebf66f47b6394cf76
SHA: af952911f5d0f1ebe8e85d1ad716dd3396ac1922
SHA: 564084f647fe2a58b409daa84e61156b1befde20
SHA: 32817b779364af8f588112e5994066846f47d736
SHA: 4a61af16acdddcef89281d09677b0c3b1816cfca
SHA: 9e3650c166d0bd3ebbd5d931d28ec5025b886b02
SHA: 9384e152346edcbdc64bcc0a68827bc52c6a5d00
SHA: 135d4d42aad44019e6753e8f013f9318538be550
SHA: c7e0beb4998e3bfdd6dbf8f0995205fb996dfa93
SHA: 1d1aac773b204c03834b96b259633d9563da21cd
SHA: 8cb342eb76c158a08f98544c3596b6eb7cc5cb44
SHA: 8c5db86925bb6a1b6312af5bae4d98ca1eedf531
SHA: 327f779775e590ccd127fc384213f8248135dd52
SHA: 5bb34446de657470b7173725840578bdddde71e2
SHA: 8de59a783ea69b15ab94f5e9c159b85c446dcd8d
SHA: 3a97c83e72bd31bb0845281b97d2d9474ca83873
SHA: 5d8ddf1e8ebde14100886ea44724f24f75d454c4

[github-actions]

Infisical secrets check: ✅ No secrets leaked!

💻 Scan logs

6:19AM INF scanning for exposed secrets...
6:19AM INF 240 commits scanned.
6:19AM INF scan completed in 69.2ms
6:19AM INF no leaks found

[sonarqubecloud]

Quality Gate failed

Failed conditions
0.0% Coverage on New Code (required ≥ 80%)

See analysis details on SonarQube Cloud