casalibs-src

An Ansible role supplying a built-from-source installation of casacore, the python-casacore Python bindings, and optionally the casarest library.

This is useful if you want to:

• Install casacore / python-casacore from time-to-time without having to remember all the fine details of the install process.
• Integrate casacore installation into a larger Ansible-powered install process.
• Check that a particular version of casacore builds OK for your target system - tweak the Vagrantfile parameters accordingly and then simply vagrant up. (In a hurry? - fire up an EC2 instance with e.g. 36 cores, configure an Ansible inventory to point at the instance, then run tests/test-casalibs-src-role.yml using the ansible-playbook command.)

The scripts go through all the required steps of:

• Installing system packages
• Downloading the source repositories and CASA measures data
• Configuring CMake builds with the required paths,
• Running the casacore build
• Running a python-casacore install-and-build from PyPI with the corresponding casacore library path specified.

The final product is a folder containing versioned builds and simple shell scripts to add them to your $PATH / $PYTHONPATH, e.g.:

~$ ls /opt/casalibs/ -lh
drwxrwxr-x 5 vagrant vagrant 4.0K Mar 23 13:08 casacore-2.0.1
-rw-rw-r-- 1 vagrant vagrant   62 Mar 23 13:10 init-casabinaries-2.0.1.sh
lrwxrwxrwx 1 vagrant vagrant   40 Mar 23 13:10 init-casabinaries.sh -> /opt/casalibs/init-casabinaries-2.0.1.sh
-rw-rw-r-- 1 vagrant vagrant  337 Mar 23 13:10 init-casalibs-2.0.1.sh
lrwxrwxrwx 1 vagrant vagrant   36 Mar 23 13:10 init-casalibs.sh -> /opt/casalibs/init-casalibs-2.0.1.sh
drwxrwxr-x 5 vagrant vagrant 4.0K Mar 23 13:10 pycasacore-2.0.0_with-core-2.0.1_packagedir

Only tested with Ubuntu, currently.

Note that if you're using a supported distribution (e.g. Ubuntu 14.04) you might prefer to use the ready-made apt-packages available from https://launchpad.net/~radio-astro/+archive/ubuntu/main.

To Do

• Finish up role-metadata, add travis-testing.

Requirements

Assumes presence of git and pip on the machine. (For the Vagrant test-vm these basics are installed from tests/base.yml.)

Role Variables

Key variables are:

• "repo_dir": All repositories are checked out under {{ repo_dir }}/casalibs
• "default_install_prefix": Libraries are built under {{ default_install_prefix }}/casalibs
• "casacore_github_version": Which casacore version-tag to checkout from github.
• "python_casacore_version": Which python-casacore version-tag to checkout from github.

See defaults/main.yml and vars/main.yml for default values and full details.

Example Playbook

See tests/test-casalibs-src-role.yml.

License

BSD

Author

Tim Staley