Add direct library-API tests for git2_ops, gix_ops, and GitOpsManager

[Copilot]

Coverage for the git ops backend layer was near zero because all existing tests route through the CLI binary. This PR adds tests/git_ops_tests.rs with 67 tests that call Git2Operations, GixOperations, and GitOpsManager directly.

Coverage added

Git2Operations

• Constructor, workdir, read/write_gitmodules, read/write_git_config, set_config_value, list_submodules
• Every missing-submodule error path (init, deinit, update, delete, get_status, fetch, reset, clean, stash, all sparse ops)
• Sparse checkout enable/set/get roundtrip and get_submodule_status against a real submodule

GixOperations

• Constructor, read/write_gitmodules (including file-creation verification), read/write_git_config (local only—global correctly fails)
• All "not implemented" stubs (add_submodule, get_submodule_status) and all "deferred to git2" stubs (reset, clean, stash, all sparse ops)
• Documents and asserts the known 2-part key limitation in write_git_config: keys like "user.name" split into an empty name segment and are rejected; set_config_value consequently always fails when the repo has any pre-existing local config

GitOpsManager

• Constructor, workdir, reopen, the full gix→git2 fallback chain for config and list operations, the gix→git2→CLI triple-fallback for apply_sparse_checkout

Data types

• SubmoduleStatusFlags bitflags (empty, single, combined, intersection) and GitConfig struct

Notes

The write_git_config / set_config_value limitation in GixOperations (3-part key requirement) is a pre-existing implementation gap—not introduced here—but is now explicitly tested and documented in the test comments.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• invalid-host
  • Triggering command: /home/REDACTED/work/submod/submod/target/debug/submod /home/REDACTED/work/submod/submod/target/debug/submod add git@invalid-host:user/repo.git --name invalid-test --path lib/invalid git add origin e/git-submodule git conf�� user.name Test User ndor/bin/git ndor/bin/git git /home/REDACTED/.lousage: $dashless $USAGE git (dns block)
  • Triggering command: /usr/bin/ssh /usr/bin/ssh -o SendEnv=GIT_PROTOCOL git@invalid-host git-upload-pack 'user/repo.git' -b main /usr/bin/git -b main nfig/composer/ve--bare git init�� /home/REDACTED/.do. (dns block)
  • Triggering command: /home/REDACTED/work/submod/submod/target/debug/submod /home/REDACTED/work/submod/submod/target/debug/submod add git@invalid-host:user/repo.git --name invalid-test --path lib/invalid p/bin/git k/submod/submod/git git /home/REDACTED/worHEAD git conf�� user.name Test User it it git t git (dns block)
• nonexistent.domain.invalid
  • Triggering command: /home/REDACTED/work/submod/submod/target/debug/submod /home/REDACTED/work/submod/submod/target/debug/submod add REDACTED --name invalid-test --path lib/invalid ndor/bin/git --all-progress-igit --revs rgo/bin/git git conf�� user.name Test User t HEAD refs/heads/main k/_temp/ghcca-nouser.email git (dns block)
  • Triggering command: /usr/lib/git-core/git-remote-http /usr/lib/git-core/git-remote-http origin REDACTED git conf�� low test@example.com k/_temp/ghcca-node/node/bin/git (dns block)
  • Triggering command: /home/REDACTED/work/submod/submod/target/debug/submod /home/REDACTED/work/submod/submod/target/debug/submod add REDACTED --name invalid-test --path lib/invalid git /tmp/.tmp7A6JIz/git git tnet/tools/git git -C lib/new read-tree /usr/sbin/git HEAD it ndor/bin/git git (dns block)
• nonexistent.invalid.domain.test
  • Triggering command: /home/REDACTED/work/submod/submod/target/debug/submod /home/REDACTED/work/submod/submod/target/debug/submod add REDACTED --name timeout-test --path lib/timeout it (dns block)
  • Triggering command: /usr/lib/git-core/git-remote-http /usr/lib/git-core/git-remote-http origin REDACTED (dns block)
  • Triggering command: /home/REDACTED/work/submod/submod/target/debug/submod /home/REDACTED/work/submod/submod/target/debug/submod add REDACTED --name timeout-test --path lib/timeout p/bin/git README.md git /home/REDACTED/worlib/sparse-test basename /usr�� p/bin/git git k/_temp/ghcca-node/node/bin/git -b (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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[Copilot]

Pull request overview

Adds direct library-API integration tests to cover the git_ops backend layer (git2_ops, gix_ops, and GitOpsManager) without routing through the CLI, improving confidence in backend behavior and fallback chains.

Changes:

• Introduces tests/git_ops_tests.rs with broad coverage for Git2Operations, GixOperations, and GitOpsManager.
• Adds tests for config read/write behavior and known gix key-format limitations, plus gix stub/deferred-operation behavior.
• Adds focused tests for SubmoduleStatusFlags bitflags behavior and GitConfig struct basics.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
see 4 files with indirect coverage changes

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