CHANGELOG.md

# DORiE Changelog


## Unreleased

### Added
* Documentation of Docker images and their usage in the CI/CD pipeline.
* DORiE now depends on [`yaml-cpp`](https://github.com/jbeder/yaml-cpp/), a
    library for reading YAML files. The version required is >=5.2.0.
* Added a abstract base class [`SimulationBase`](dune/dorie/interface/base_simulation.hh) 
    that models the concept of simulation steps so that they 
    can be later coupled with other simulations.

### Changed
* Rebuilds of the DUNE environment Docker image are now triggered by setting the
    CI variable `REBUILD_BASE_IMAGE` to a non-empty value. Previously, the
    builds in stage `setup` where triggered by any manual pipeline run.
* `Simulation` is renamed `RichardsSimulation` and moved to 
	[richards_simulation.hh](dune/dorie/interface/richards_simulation.hh).
* `RichardsSimulation` now has its own `RichardsSimulationTraits` derived from
    `BaseTraits`, which defines all its member types. `BaseTraits` now have
    reduced content and are intended to be shared between models/simulations.
* The test system folder was renamed from `testing` to [`test`](test).

### Fixed
* Removed VTK output from `dorie_mass_conservation` executable, which would
    cause the corresponding test to fail if the designated output directory did
    not exist.
* Removed CI artifacts of `test` stage from `deploy` jobs.
* Correctly estimate the number of row entries in the matrix backend based on
    the DG discretization and proper static blocking. This can lead to a
    performance improvement for large problems.
* VTK output is now written _before_ the grid is adapted. Previously, the output
    displayed the adapted grid and not the one the solution was computed on.
* Grid adaptation is skipped after computing the final solution.
* Path to Pipeline artifacts for `test` stage. The artifacts are now correctly
    captured and can be viewed and downloaded from the GitLab web interface.
* Fix a bug in the boundary condition evaluation where an `end()` iterator
    was dereferenced without error.


## 1.1.0 (2018-07-27)

### Added
* DORiE now employs a `SubsamplingVTKWriter` for higher output precision.
    Subsampling levels are controlled via the new key `output.subsamplingLevel`.
* Automatic deployment of `devel` and stable DORiE Docker Images to Docker Hub.
* Automatic update of the DUNE environment Docker Image for `master` builds.
* CI pipeline now also compiles a Debug build with the LLVM Clang compiler.
* Add `.gitattributes` for `CHANGELOG.md` to reduce merge conflicts with
    `merge=union`.
* Public API definition in documentation.

### Changed
* Update code base to *DUNE v2.6*.
* Raise software requirements to versions available on Ubuntu 18.04 LTS
    (Bionic Beaver).
* Switch VTK output from conforming to non-conforming.
* Use `multicore` build tag only for `test:parallel` build because the current
    GitLab Runner cannot handle the load.
* Use the `OVLP_AMG_4_DG` linear solver for all computations, including
    sequential ones. This significantly improves performance for large problems.
* Change compilation order which reduces RAM usage when compiling in parallel.
* Decentralization of the header system so that in most of the header files are 
	independent of each other.

### Deprecated
* `output.subsamplingLevel` is optional and defaults to 0 if not given
    explicitly in the config file. The key will become mandatory in future
    versions.

### Removed
* Complete doxygen documentation from Sphinx docs.

### Fixed
* The source code is now compatible to the Clang LLVM compiler.
    DORiE can now be compiled with the onboard compiler on macOS.
* Fix finite element map used for simplex grids. The old one did not implement
    a discontinuous function space.
* Allow warnings on ParMETIS not being available for parallel computations.


## 1.0.0 (2018-03-28)

First stable version.