Nix

[UnstoppableMango]

• WIP
• WIP
• Update deps
• That worked I guess
• CI and stuff

[Copilot]

Pull request overview

This PR adds Nix flake support to the devctl project, enabling reproducible builds and development environments through Nix. The changes include dependency updates, test adaptations for Nix environments, and CI integration.

• Adds Nix flake configuration with gomod2nix for Go dependency management
• Updates GitHub Actions CI to include Nix build validation and gomod2nix synchronization checks
• Refactors test suite to work in Nix build environments by replacing git repository detection with manual path construction

Reviewed changes

Copilot reviewed 10 out of 13 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
flake.nix	Defines Nix flake with build configuration, development shell, and multi-platform support
flake.lock	Lock file pinning Nix flake input versions
gomod2nix.toml	Generated Go module dependency hashes for Nix builds
go.mod	Adds gomod2nix as a Go tool and updates unmango/go dependency to v0.10.2
go.sum	Updates checksums for new and updated dependencies
test/e2e/e2e_suite_test.go	Replaces git.Root with manual path construction using os.Getwd and filepath.Join
pkg/work/work.go	Updates git.Root call to git.RootContext for consistency
pkg/work/work_test.go	Changes error assertion from exact match to substring match for compatibility
pkg/work/cmd_test.go	Adds gitInit helper function to create temporary git repositories for testing
Makefile	Adds Nix-related variables and gomod2nix.toml build target, replaces WORKING_DIR with CURDIR
.github/workflows/ci.yml	Adds Nix build job and gomod2nix synchronization check job
.gitignore	Excludes Nix-specific artifacts (.direnv/, result)
.dprint.json	Excludes gomod2nix.toml from formatting

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