# Change Log All notable changes to this project will be documented in this file. See [Conventional Commits](Https://conventionalcommits.org) for commit guidelines. ## [v0.13.1](https://github.com/ash-project/reactor/compare/v0.13.0...v0.13.1) (2025-02-11) ### Bug Fixes: * Radically simplify reactor composition. (#162) ## [v0.13.0](https://github.com/ash-project/reactor/compare/v0.12.1...v0.13.0) (2025-02-11) ### Features: * template: Add `template` step which renders an EEx template. (#154) * Add `where` and `guard` entities to steps. (#148) ### Bug Fixes: * Correctly pass guards into `flunk` step. (#158) * Runtime step planning with intermediate results. (#156) ### Improvements: * Verify step name uniqueness recursively. (#153) ## [v0.12.1](https://github.com/ash-project/reactor/compare/v0.12.0...v0.12.1) (2025-02-04) ### Bug Fixes: * Correctly pass guards into `flunk` step. (#158) * Runtime step planning with intermediate results. (#156) ## [v0.12.0](https://github.com/ash-project/reactor/compare/v0.11.0...v0.12.0) (2025-02-01) ### Features: * template: Add `template` step which renders an EEx template. (#154) ### Improvements: * Verify step name uniqueness recursively. (#153) ## [v0.11.0](https://github.com/ash-project/reactor/compare/v0.10.3...v0.11.0) (2025-01-28) ### Features: * Add `where` and `guard` entities to steps. (#148) ## [v0.10.3](https://github.com/ash-project/reactor/compare/v0.10.2...v0.10.3) (2024-12-19) ### Improvements: * make igniter optional ## [v0.10.2](https://github.com/ash-project/reactor/compare/v0.10.1...v0.10.2) (2024-12-01) ### Improvements: * DSL: Add `description` options to most DSL entities. (#137) ## [v0.10.1](https://github.com/ash-project/reactor/compare/v0.10.0...v0.10.1) (2024-11-06) ### Bug Fixes: * Switch: Don't duplicate outside steps inside switch matches. (#133) * Don't raise error when switch is missing default branch (#129) ## [v0.10.0](https://github.com/ash-project/reactor/compare/v0.9.1...v0.10.0) (2024-09-15) ### Features: * Reactor.Dsl.Flunk: Add a special step type which always fails. (#125) ## [v0.9.1](https://github.com/ash-project/reactor/compare/v0.9.0...v0.9.1) (2024-08-12) ### Bug Fixes: * `Reactor.run!/4` should not return an `:ok` tuple. ## [v0.9.0](https://github.com/ash-project/reactor/compare/v0.8.5...v0.9.0) (2024-07-18) ### Features: * map: Add the ability to map over elements of a collection inside a reactor. (#123) * map: Add the ability to map over elements of a collection inside a reactor. ### Bug Fixes: * automatically pass extra arguments from the map step to nested steps. * spurious test failures seemingly caused by `Mimic`. ### Improvements: * throw a more helpful error when a step returns an invalid result. ## [v0.8.5](https://github.com/ash-project/reactor/compare/v0.8.4...v0.8.5) (2024-07-10) ### Improvements: * add `mix reactor.install` (#124) ## [v0.8.4](https://github.com/ash-project/reactor/compare/v0.8.3...v0.8.4) (2024-05-25) ### Bug Fixes: * inability to store composed reactors at compile time. ## [v0.8.3](https://github.com/ash-project/reactor/compare/v0.8.2...v0.8.3) (2024-05-24) ### Bug Fixes: * Missing `__identifier__` field in `compose` DSL struct. ## [v0.8.2](https://github.com/ash-project/reactor/compare/v0.8.1...v0.8.2) (2024-05-08) ### Bug Fixes: * initialisation issue with middlewares. ## [v0.8.1](https://github.com/ash-project/reactor/compare/v0.8.0...v0.8.1) (2024-03-20) ### Bug Fixes: * RunStepError: pass entire step struct instead of just name when raising. ## [v0.8.0](https://github.com/ash-project/reactor/compare/v0.7.0...v0.8.0) (2024-03-18) ### Breaking Changes: * Use `Splode` for managing errors. (#97) ### Bug Fixes: * Don't assume `UndefinedFunctionError` means the module is not a Reactor. ### Improvements: * Add template guards. ## [v0.7.0](https://github.com/ash-project/reactor/compare/v0.6.0...v0.7.0) (2024-02-28) ### Features: * Add telemetry middleware. (#93) * Add a middleware which emits telemetry events about Reactor. ### Bug Fixes: * incorrect function arity for `Group.after_fun` DSL. ### Improvements: * don't incur compile-time dependencies on middleware. ## [v0.6.0](https://github.com/ash-project/reactor/compare/v0.5.2...v0.6.0) (2024-02-26) ### Breaking Changes: * Remove hooks and replace with middleware behaviour. (#90) * Remove hooks and replace with middleware behaviour. ### Improvements: * Middleware: Add `get_process_context/0` and `set_process_context/1` middleware hooks. * Add step event callback to middleware. ## [v0.5.2](https://github.com/ash-project/reactor/compare/v0.5.1...v0.5.2) (2024-02-18) ### Bug Fixes: * callback spec for `Reactor.Step.async?/1`. ### Performance Improvements: * Don't iterate the entire graph every time through the loop. (#88) ## [v0.5.1](https://github.com/ash-project/reactor/compare/v0.5.0...v0.5.1) (2024-02-14) ### Improvements: * Move `can?/2` and `async?/1` into `Reactor.Step` behaviour. (#87) ## [v0.5.0](https://github.com/ash-project/reactor/compare/v0.4.1...v0.5.0) (2024-02-07) ### Features: * Add lifecycle hooks to Reactor (#83) ### Bug Fixes: * don't deadlock when lots of async reactors are sharing a concurrency pool. (#36) * weird issue with aliases sometimes not being expanded in generated reactors. (#58) ### Improvements: * Add ability for steps to decide at runtime whether they should be run asyncronously. (#84) ## [v0.4.1](https://github.com/ash-project/reactor/compare/v0.4.0...v0.4.1) (2023-09-26) ### Bug Fixes: * weird issue with aliases sometimes not being expanded in generated reactors. ## [v0.4.0](https://github.com/ash-project/reactor/compare/v0.3.5...v0.4.0) (2023-09-11) ### Features: * Add `collect` step entity. (#53) ## [v0.3.5](https://github.com/ash-project/reactor/compare/v0.3.4...v0.3.5) (2023-09-06) ### Improvements: * Template: Abstract template type so that it can be used by extensions. ## [v0.3.4](https://github.com/ash-project/reactor/compare/v0.3.3...v0.3.4) (2023-09-04) ### Bug Fixes: * Allow `reactor` DSL section to be patched. * Reactor: fix call to `use Spark.Dsl`. ## [v0.3.3](https://github.com/ash-project/reactor/compare/v0.3.2...v0.3.3) (2023-09-01) ### Improvements: * Dsl: Extract DSL entities into their target modules. (#50) ## [v0.3.2](https://github.com/ash-project/reactor/compare/v0.3.1...v0.3.2) (2023-07-27) ### Bug Fixes: * Don't swallow errors when a step runs out of retries. (#41) ## [v0.3.1](https://github.com/ash-project/reactor/compare/v0.3.0...v0.3.1) (2023-07-24) ### Improvements: * Add `wait_for` DSL. (#39) * Add "subpaths" to templates. (#31) * Step.Debug: Add `debug` step and DSL. (#30) * Step.Switch: Add `switch` DSL and step type. (#29) ## [v0.3.0](https://github.com/ash-project/reactor/compare/v0.2.4...v0.3.0) (2023-07-03) ### Features: * Step.Around: Add ability to wrap a function around a group of steps. (#24) ### Bug Fixes: * Executor: don't double-iterate the graph each time through the loop. ### Improvements: * Add `group` DSL entity and `Reactor.Step.Group`. (#27) * Reactor.Executor: track concurrent process usage across multiple reactors. (#26) * Support `timeout` and `async?` Reactor options. (#20) * Invert DSL entity building. (#19) * Allow entire step behaviour to be defined in the DSL. (#18) ### Performance Improvements: * Dsl: Build and pre-plan DSL reactors. * Builder: build transformation steps as synchronous. ## [v0.2.4](https://github.com/ash-project/reactor/compare/v0.2.3...v0.2.4) (2023-06-15) ### Improvements: * Add ability to compose reactors. * Builder: rename internally generated steps to start with `:__reactor__`. (#10) ## [v0.2.3](https://github.com/ash-project/reactor/compare/v0.2.2...v0.2.3) (2023-06-07) ### Improvements: * Add step-wide argument transforms. (#9) * Add step-wide argument transforms. ## [v0.2.2](https://github.com/ash-project/reactor/compare/v0.2.1...v0.2.2) (2023-05-15) ### Bug Fixes: * Reactor.Argument: Remove spurious `is_atom` constraint on `Argument.from_input/2..3`. ## [v0.2.1](https://github.com/ash-project/reactor/compare/v0.2.0...v0.2.1) (2023-05-12) ### Improvements: * Reactor.Step: remove `can?/1` and replace with optional callbacks. (#6) ## [v0.2.0](https://github.com/ash-project/reactor/compare/v0.1.0...v0.2.0) (2023-05-10) ### Features: * implement basic reactor behaviour. (#1) ## [v0.1.0](https://github.com/ash-project/reactor/compare/v0.1.0...v0.1.0) (2023-04-19)