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Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog and this project adheres to Semantic Versioning.

Unreleased

  • No changes yet.

1.7.0 - 2019-01-04

Added

  • Added Group option for Provide to add value groups to the container without rewriting constructors. See package doucmentation for more information.

1.6.0 - 2018-11-06

Changed

  • When an error graph is visualized, the graph is pruned so that the graph only contains failure nodes.
  • Container visualization is now oriented from right to left.

1.5.1 - 2018-11-01

Fixed

  • Fixed a test that was causing Dig to be unusable with Go Modules.

1.5.0 - 2018-09-19

Added

  • Added a DeferAcyclicVerification container option that defers graph cycle detection until the next Invoke.

Changed

  • Improved cycle-detection performance by 50x in certain degenerative cases.

1.4.0 - 2018-08-16

Added

  • Added Visualize function to visualize the state of the container in the GraphViz DOT format. This allows visualization of error types and the dependency relationships of types in the container.
  • Added CanVisualizeError function to determine if an error can be visualized in the graph.
  • Added Name option for Provide to add named values to the container without rewriting constructors. See package documentation for more information.

Changed

  • name:"..." tags on nested Result Objects will now cause errors instead of being ignored.

1.3.0 - 2017-12-04

Changed

  • Improved messages for errors thrown by Dig under a many scenarios to be more informative.

1.2.0 - 2017-11-07

Added

  • dig.In and dig.Out now support value groups, making it possible to produce many values of the same type from different constructors. See package documentation for more information.

1.1.0 - 2017-09-15

Added

  • Added the dig.RootCause function which allows retrieving the original constructor error that caused an Invoke failure.

Changed

  • Errors from Invoke now attempt to hint to the user a presence of a similar type, for example a pointer to the requested type and vice versa.

1.0.0 - 2017-07-31

First stable release: no breaking changes will be made in the 1.x series.

Changed

  • Provide and Invoke will now fail if dig.In or dig.Out structs contain unexported fields. Previously these fields were ignored which often led to confusion.

1.0.0-rc2 - 2017-07-21

Added

  • Exported dig.IsIn and dig.IsOut so that consuming libraries can check if a params or return struct embeds the dig.In and dig.Out types, respectively.

Changed

  • Added variadic options to all public APIS so that new functionality can be introduced post v1.0.0 without introducing breaking changes.
  • Functions with variadic arguments can now be passed to dig.Provide and dig.Invoke. Previously this caused an error, whereas now the args will be ignored.

1.0.0-rc1 - 2017-06-21

First release candidate.

0.5.0 - 2017-06-19

Added

  • dig.In and dig.Out now support named instances, i.e.:

    type param struct {
  dig.In

  DB1 DB.Connection `name:"primary"`
  DB2 DB.Connection `name:"secondary"`
}

Fixed

  • Structs compatible with dig.In and dig.Out may now be generated using reflect.StructOf.

0.4.0 - 2017-06-12

Added

  • Add dig.In embeddable type for advanced use-cases of specifying dependencies.
  • Add dig.Out embeddable type for advanced use-cases of constructors inserting types in the container.
  • Add support for optional parameters through optional:"true" tag on dig.In objects.
  • Add support for value types and many built-ins (maps, slices, channels).

Changed

  • [Breaking] Restrict the API surface to only Provide and Invoke.
  • [Breaking] Update Provide method to accept variadic arguments.

Removed

  • [Breaking] Remove Must* funcs to greatly reduce API surface area.
  • Providing constructors with common returned types results in an error.

0.3 - 2017-05-02

Added

  • Add functionality to Provide to support constructor with n return objects to be resolved into the dig.Graph
  • Add Invoke function to invoke provided function and insert return objects into the dig.Graph

Changed

  • Rename RegisterAll and MustRegisterAll to ProvideAll and MustProvideAll.

0.2 - 2017-03-27

Changed

  • Rename Register to Provide for clarity and to recude clash with other Register functions.
  • Rename dig.Graph to dig.Container.

Removed

  • Remove the package-level functions and the DefaultGraph.

0.1 - 2017-03-23

Initial release.