About emela-feedstock

Feedstock license: BSD-3-Clause

Home: https://github.com/gstagnit/eMELA

Package license: MIT

Summary: emela: an improved QED-version of MELA

Development: https://github.com/gstagnit/eMELA

eMELA is a library that implements the evolution in pure QED of the unpolarised electron parton distribution functions (PDFs) up to next-to-leading logarithmic (NLL) approximation, according to the papers listed on the GitHub repository. eMELA includes the evolution with multiple fermion families and their mass thresholds, and it gives one the possibility of choosing among three different UV-renormalisation schemes (MSBAR: $\overline{\rm MS}$, ALPMZ: $\alpha(m_Z)$, ALGMU: $G_\mu$) and two different factorisation schemes (MSBAR: $\overline{\rm MS}$, DELTA: $\Delta$).

More in detail, eMELA is an improved QED-version of MELA. It consists of a Fortran code responsible for the numerical evolution of the PDFs, and a C++ wrapper that provides one with the analytical solutions in the asymptotic $z \to 1$ region. Moreover, the possibility is given to the user to output the PDFs as grids compliant with the LHAPDF format, that can be employed at a later stage. Regardless of whether the numerical solution is computed at runtime or read from the grids, eMELA offers the possibility to switch to the analytical solution in the asymptotic region. This must be considered as the default option when using the PDFs for physics simulations.

Note: eMELA supersedes ePDF, that was limited to the evolution with a single lepton in the $\overline{\rm MS}$ renormalisation and factorisation schemes.

Current build status

Azure

Variant Status linux_64 linux_aarch64 linux_ppc64le osx_64 osx_arm64

Current release info

Name	Downloads	Version	Platforms

Installing emela

Installing emela from the conda-forge channel can be achieved by adding conda-forge to your channels with:

conda config --add channels conda-forge
conda config --set channel_priority strict

Once the conda-forge channel has been enabled, emela can be installed with conda:

conda install emela

or with mamba:

mamba install emela

It is possible to list all of the versions of emela available on your platform with conda:

conda search emela --channel conda-forge

or with mamba:

mamba search emela --channel conda-forge

Alternatively, mamba repoquery may provide more information:

# Search all versions available on your platform:
mamba repoquery search emela --channel conda-forge

# List packages depending on `emela`:
mamba repoquery whoneeds emela --channel conda-forge

# List dependencies of `emela`:
mamba repoquery depends emela --channel conda-forge

About conda-forge

conda-forge is a community-led conda channel of installable packages. In order to provide high-quality builds, the process has been automated into the conda-forge GitHub organization. The conda-forge organization contains one repository for each of the installable packages. Such a repository is known as a feedstock.

A feedstock is made up of a conda recipe (the instructions on what and how to build the package) and the necessary configurations for automatic building using freely available continuous integration services. Thanks to the awesome service provided by Azure, GitHub, CircleCI, AppVeyor, Drone, and TravisCI it is possible to build and upload installable packages to the conda-forge anaconda.org channel for Linux, Windows and OSX respectively.

To manage the continuous integration and simplify feedstock maintenance conda-smithy has been developed. Using the conda-forge.yml within this repository, it is possible to re-render all of this feedstock's supporting files (e.g. the CI configuration files) with conda smithy rerender.

For more information please check the conda-forge documentation.

Terminology

feedstock - the conda recipe (raw material), supporting scripts and CI configuration.

conda-smithy - the tool which helps orchestrate the feedstock. Its primary use is in the construction of the CI .yml files and simplify the management of many feedstocks.

conda-forge - the place where the feedstock and smithy live and work to produce the finished article (built conda distributions)

Updating emela-feedstock

If you would like to improve the emela recipe or build a new package version, please fork this repository and submit a PR. Upon submission, your changes will be run on the appropriate platforms to give the reviewer an opportunity to confirm that the changes result in a successful build. Once merged, the recipe will be re-built and uploaded automatically to the conda-forge channel, whereupon the built conda packages will be available for everybody to install and use from the conda-forge channel. Note that all branches in the conda-forge/emela-feedstock are immediately built and any created packages are uploaded, so PRs should be based on branches in forks and branches in the main repository should only be used to build distinct package versions.

In order to produce a uniquely identifiable distribution:

• If the version of a package is not being increased, please add or increase the build/number.
• If the version of a package is being increased, please remember to return the build/number back to 0.

Feedstock Maintainers

• @matthewfeickert