Description

(Unofficial) Rust bindings for the LHAPDF C++ library, with automatic management functions. This is the successor of https://github.com/cschwan/lhapdf.

Rust feature flags

• managed: this feature flag enables the automatic downloading of PDFs. See the section below on how to configure its behavior. If you would like to disable this feature, specify no-default-features = true when depending on managed-lhapdf.
• static: when enabled, the LHAPDF library will be linked statically. This allows to redistribute built binaries that run on systems where LHAPDF isn't installed.

Automatic PDF management

If enabled, this crate automatically downloads the required PDF sets. The behavior can be controlled with the configuration file managed-lhapdf.toml in the user's data directory. This file is automatically created if it does not exist. An example of a customized configuration looks as follows:

# these paths are scanned for PDF sets, in the given order, and multiple paths
# can be given as strings seperated by commas. This crate will *not* write into
# any of these directories
lhapdf_data_path_read = []
# if the following path is an empty string, nothing will be automatically
# downloaded. If the path is given, however, this crate will download PDFs sets
# and place them in here that are not found in the previous directories
lhapdf_data_path_write = "/home/alice/.local/share/LHAPDF"
# URL for the pdfsets.index file, which is used to translate LHAIDs to PDF set
# names
pdfsets_index_url = "https://lhapdfsets.web.cern.ch/current/pdfsets.index"
# URLs from which PDF sets are downloaded, in the given order. If a set is not
# found for the first URL, the second URL (and so on) will be tried
pdfset_urls = [
    "https://lhapdfsets.web.cern.ch/current/",
    "https://data.nnpdf.science/pdfs/",
    "https://data.nnpdf.science/pineappl/pdfs/",
]

(Un)safeness

The struct Pdf implements Send and Sync, which is only safe as long as the corresponding member functions in LHAPDF are truly thread safe. The following versions are known not to be thread safe:

• 6.4.x, see LHAPDF merge request #27
• 6.3.x, see LHAPDF issue #2