# Changelog
All notable changes to this package will be documented in this file.
The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
## [0.5.2.0] - 2026-10-13
### Added
- Nix 2.34, 2.35 support
## [0.5.1.0] - 2026-01-06
### Added
- Nix support up to 2.33
## [0.5.0.0] - 2025-07-18
### Changed
- `init` now installs synchronous signal handlers for you. You may remove your call to `installDefaultSigINTHandler`.
## [0.4.0.0] - 2025-05-05
### Added
- Nix 2.28 support
### Removed
- `evalArgs`. This removes a dependency on the otherwise unused nix-cmd library. Use `valueFromExpressionString` and a library like `optparse-applicative` instead to create a nicer user experience.
## [0.3.6.5] - 2024-11-15
### Added
- Nix 2.24 support
This includes the newly separate `nix-flake` library as a dependency of `hercules-ci-cnix-expr`.
## [0.3.6.4] - 2024-06-12
### Removed
- Unnecessary data files, improving packaging.
## [0.3.6.3] - 2024-05-19
### Fixed
- Build warnings.
## [0.3.6.2] - 2024-05-03
### Fixed
- Remove most uses of `c_str()`, of which at least one exhibited undefined behavior.
## [0.3.6.1] - 2024-02-12
### Added
- Nix support up to 2.20
## [0.3.6.0] - 2023-06-28
### Added
- `allowThreads`, `runInGcSafeThread`
- Nix 2.15 support
- Nix 2.16 support
## [0.3.5.1] - 2023-03-06
### Added
- Nix 2.14 support
- Nix 2.13 support
## [0.3.5.0] - 2022-12-29
### Added
- `initThread` for stack overflow handling
## [0.3.4.0] - 2022-11-15
### Added
- `::??`, `#??` for redundantly optional types: unset or null
- Schema module instances for `()` representing `null`
- `InvalidValue` constructor for `NixException`
- `.` and `?` type operators for field access and optional field access
- Schema module instances for `[a]` for Nix lists of `a`,
- Schema `Int64` (= `NixInt`) instance for Nix integers
- Schema `traverseArray` helper for traversing Nix lists (should have been renamed)
## [0.3.3.0] - 2022-06-21
### Added
- Nix 2.9 support
## [0.3.2.0] - 2022-05-17
### Added
- Nix 2.8 support
## [0.3.1.2] - 2022-04-08
### Fixed
- `getFlakeFromGit` now handles branch names correctly
## [0.3.1.1] - 2022-03-21
### Removed
- Clean up inline-c generated exports
### Fixed
- Add test data that was missing from the sdist tarball
## [0.3.1.0] - 2022-03-18
### Added
- `instance ToValue (PSObject t)`
## [0.3.0.0] - 2022-03-15
### Added
- `ToValue` and `ToRawValue` classes for converting Haskell values
to Nix values.
- `Hercules.CNix.Expr.Schema` module for a typed interface between
code in the Nix language and Haskell. This also includes
provenance tracking, improving error messages while reducing
error handling noise in the Haskell code.
- `addAllowedPath`, `addInternalAllowedPaths` for use with restricted mode.
### Changed
- Flakes are enabled during `init`
### Removed
- Nix 2.3 support
## [0.2.0.2] - 2022-03-09
### Added
- Nix 2.7 support
## [0.2.0.1] - 2022-03-07
### Added
- Improved conditional code support with `cabal-pkg-config-version-hook`
### Fixed
- Build with newer Nix versions 2.5, 2.6
## [0.2.0.0] - 2021-06-22
### Added
- nixUnstable compatibility with flag `nix-2_4`
## [0.1.0.0] - 2021-03-07
### Added
- First code based on Hercules CI Agent.
[0.5.1.0]: https://github.com/hercules-ci/hercules-ci-agent/commits/hercules-ci-cnix-expr-0.5.1.0/hercules-ci-cnix-expr
[0.5.0.0]: https://github.com/hercules-ci/hercules-ci-agent/commits/hercules-ci-cnix-expr-0.5.0.0/hercules-ci-cnix-expr
[0.4.0.0]: https://github.com/hercules-ci/hercules-ci-agent/commits/hercules-ci-cnix-expr-0.4.0.0/hercules-ci-cnix-expr
[0.3.6.5]: https://github.com/hercules-ci/hercules-ci-agent/commits/hercules-ci-cnix-expr-0.3.6.5/hercules-ci-cnix-expr
[0.3.6.4]: https://github.com/hercules-ci/hercules-ci-agent/commits/hercules-ci-cnix-expr-0.3.6.4/hercules-ci-cnix-expr
[0.3.6.3]: https://github.com/hercules-ci/hercules-ci-agent/commits/hercules-ci-cnix-expr-0.3.6.3/hercules-ci-cnix-expr
[0.3.6.2]: https://github.com/hercules-ci/hercules-ci-agent/commits/hercules-ci-cnix-expr-0.3.6.2/hercules-ci-cnix-expr
[0.3.6.1]: https://github.com/hercules-ci/hercules-ci-agent/commits/hercules-ci-cnix-expr-0.3.6.1/hercules-ci-cnix-expr
[0.3.6.0]: https://github.com/hercules-ci/hercules-ci-agent/commits/hercules-ci-cnix-expr-0.3.6.0/hercules-ci-cnix-expr
[0.3.5.1]: https://github.com/hercules-ci/hercules-ci-agent/commits/hercules-ci-cnix-expr-0.3.5.1/hercules-ci-cnix-expr
[0.3.5.0]: https://github.com/hercules-ci/hercules-ci-agent/commits/hercules-ci-cnix-expr-0.3.5.0/hercules-ci-cnix-expr
[0.3.4.0]: https://github.com/hercules-ci/hercules-ci-agent/commits/hercules-ci-cnix-expr-0.3.4.0/hercules-ci-cnix-expr
[0.3.3.0]: https://github.com/hercules-ci/hercules-ci-agent/commits/hercules-ci-cnix-expr-0.3.3.0/hercules-ci-cnix-expr
[0.3.2.0]: https://github.com/hercules-ci/hercules-ci-agent/commits/hercules-ci-cnix-expr-0.3.2.0/hercules-ci-cnix-expr
[0.3.1.2]: https://github.com/hercules-ci/hercules-ci-agent/commits/hercules-ci-cnix-expr-0.3.1.2/hercules-ci-cnix-expr
[0.3.1.1]: https://github.com/hercules-ci/hercules-ci-agent/commits/hercules-ci-cnix-expr-0.3.1.1/hercules-ci-cnix-expr
[0.3.1.0]: https://github.com/hercules-ci/hercules-ci-agent/commits/hercules-ci-cnix-expr-0.3.1.0/hercules-ci-cnix-expr
[0.3.0.0]: https://github.com/hercules-ci/hercules-ci-agent/commits/hercules-ci-cnix-expr-0.3.0.0/hercules-ci-cnix-expr
[0.2.0.2]: https://github.com/hercules-ci/hercules-ci-agent/commits/hercules-ci-cnix-expr-0.2.0.2/hercules-ci-cnix-expr
[0.2.0.1]: https://github.com/hercules-ci/hercules-ci-agent/commits/hercules-ci-cnix-expr-0.2.0.1/hercules-ci-cnix-expr
[0.2.0.0]: https://github.com/hercules-ci/hercules-ci-agent/commits/hercules-ci-cnix-expr-0.2.0.0/hercules-ci-cnix-expr
[0.1.0.0]: https://github.com/hercules-ci/hercules-ci-agent/commits/hercules-ci-cnix-expr-0.1.0.0/hercules-ci-cnix-expr
[Unreleased]: https://github.com/hercules-ci/hercules-ci-agent/commits/master/hercules-ci-cnix-expr