get_file_content Match Paths in Git Tree if Full Path Unknown

[LuluBeatson]

Adds additional steps to the end of get_file_content so that if the provided path wasn't found, then we check the Git Tree for possible matching paths. A path matches if it ends with the provided path.

Changes

• Added additional processing to the end of get_file_content so that if previous attempts to get the file/dir fail, then:
  • Get the recursive Git Tree containing tree and blob paths
  • Filters the tree for entries matching the input path arg. New func filterTree.
  • If any matches, returns a tool result containing the resolved ref & sha and matching paths. Else resume and return tool error result as normal.
• Refactored logic for resolving input ref and sha into a function resolveGitReference. This still handles refs of the form refs/tags/{tag}, refs/heads/{branch}, refs/pull/{pr_number}/head and finds their commit SHA.
• Unit tests for new functions filterTree, resolveGitReference.
• Update unit tests for GetFileContent to include mocking github client for resolving the git refs.

Examples

File (Unknown Path) from Branch with 2 Matches

get file "server.go" from github/github-mcp-server

File (Unknown Path) from Last Release

get file "server.go" from github/github-mcp-server from the last release

File from Pull Request

get repositories.go from PR #605 in github/github-mcp-server

File from Branch

get repositories.go from the lulu/get-file branch of github/github-mcp-server

TODO

• Ensure ref is not empty when we call client.Git.GetTree
• Ensure / are handled properly by filterPaths. Have unit tests.
• Properly formatted errors

[Copilot]

Pull Request Overview

This PR enhances the get_file_content function to handle cases where the provided path isn't found by checking the Git tree for possible matching paths that end with the provided path. The implementation includes comprehensive error handling and path resolution improvements.

• Refactored Git reference resolution logic into a dedicated function for better maintainability
• Added fuzzy path matching using Git tree traversal when exact paths fail
• Enhanced test coverage for the new functionality with proper mocking

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
pkg/github/repositories.go	Refactored Git reference resolution, added fuzzy path matching via Git tree, and improved error handling in GetFileContents
pkg/github/repositories_test.go	Added comprehensive unit tests for new functions and updated existing tests to include Git reference mocking

[omgitsads]

This looks great! We just need to think about how to surface the API errors from the resolveGitReference func before this can

[LuluBeatson]

Thank you @omgitsads! I've added the API errors to context

Screenshot: Success

Screenshot: Non-existent Ref

[omgitsads]