- ensures that the latest openfoam packages are always installed.
  The possible gains for caching other parts of the build are quite
  minimal.

ENH: include packaging helpers

  - 00-multiarch-build
  - 00-native-build

- cross-ref to cfd-online:
  https://www.cfd-online.com/Forums/openfoam-installation/256441-issues-installing-v2312-debian-12-bookworm.html

STYLE: use longer license name in SPDX identifier

- include mention of this repository location in the welcome message
  to make it easier for people to find and fork.

- sourcing the rc file with '' (explicit empty arguments) is a
  bash-only feature

Add Apptainer template definition files

Closes #2

See merge request !1

FIX: remove Leap workarounds for science repo

- importing of gpg keys now properly addressed in the dl.openfoam.com
  script, so can eliminate the workarounds here.

- now link /usr/bin/openfoamVERSION to /usr/bin/openfoam
  which provides a consistent alternative entry point

STYLE: reference jammy instead of focal in comments

- add post-install hook to add upgrade warning message

- the run scripts are largely identical to docker/podman solutions
  except no libnss wrapping needed, and sudo modification is disallowed

CONFIG: adjust for updated location of libnss_wrapper (ubuntu 22.04)

- split images into two basic layers:
    1. OS + packages
    2. OpenFOAM repo/packages

  This allows better reuse of layer 1 between different OpenFOAM
  versions.

- create images with version tagging.

  Previously had images such as openfoam2112-run, openfoam2106-run etc.
  However this will get out of control in the very near future.

  Now just use the standard image tagging for the OpenFOAM versions,
  which also benefits from the common base layer 1 for the images.

  Old  -> New
  openfoam2112-run -> openfoam-run:2112 (and openfoam-run:latest)
  openfoam2106-run -> openfoam-run:2106

ENH: add --shm-size as pass-through option

- needed for intelmpi (eg, --shm-size=4G)

- an alternative way to run images with user id mapping.
  Internally it uses the chroot command for user ids, supplemented
  with some handling to preserve similar mount names under the home
  directory.

  [Script was previously local content only].

- update leap build container. Add a mingw version for reference

- in some circumstances it can be desirable to flatten into a single
  application directory (ie, no /usr/lib/openfoam hierarchy)
  or install _below_ /openfoam

- allow tar files in the context, to support sideloading applications
  via the docker ADD command

- basic option handling for post-install, split off fix permissions
  into a separate file. This can be useful when staging sideloads.

- drop trigger of mpi-update links. This was apparently only needed
  since the RPMs had used 'find' during the build and that is not
  installed for the Fedora rpmbuild env. Upstream RPM generation changed
  accordingly so can now drop that bit from post-install.

update docker files to use ARG parameterization

add some general build container descriptions