f27c5e74ed
This attempts to address one of the complaints at #5996 (comment): > Repo currently caches package instances by Spec, and those Package instances have a Spec. > This is unnecessary and causes confusion. I think I thought that we'd need to cache instances > after loading package classes, but really just caching the classes is fine. With this update, Repo's package cache is removed and Specs cache the package reference themselves. One consequence is that Specs which compare as equal will store separate instances of a Package class (not doing this creates issues for #4595 (comment)). There were several references to Spec.package that could be replaced with Spec.package_class without any additional modifications. There are still a couple remaining references to Spec.package in Spec that would require adding functionality before replacing (e.g. calling Package.provides and Package.installed). Note this makes it difficult to mock fetchers for tests which invokes code that reconstructs specs. test_packaging was one example of this where the updates caused a failure (in that case the error was avoided by not making an unnecessary call). Details: * Replace instances of spec.package with spec.package_class where a class method is being called * Remove instances of Repo.get where Spec.package_class can be used in its place * remove Repo.get caching instances of Package class for specs * remove redundant check (which is also incorrect now that each spec stores its own copy of its package) * avoid creating mirror with specs because it copies specs and those copies dont refer to the mocked fetcher (and it is also not required for the test) * remove checks that are no longer necessary since repo doesn't cache specs |
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|---|---|---|
| bin | ||
| etc/spack/defaults | ||
| lib/spack | ||
| share/spack | ||
| templates | ||
| var/spack | ||
| .codecov.yml | ||
| .coveragerc | ||
| .flake8 | ||
| .flake8_packages | ||
| .gitignore | ||
| .mailmap | ||
| .travis.yml | ||
| CODE_OF_CONDUCT.md | ||
| CONTRIBUTING.md | ||
| issue_template.md | ||
| LICENSE | ||
| NOTICE | ||
| pytest.ini | ||
| README.md | ||
Spack
Spack is a multi-platform package manager that builds and installs multiple versions and configurations of software. It works on Linux, macOS, and many supercomputers. Spack is non-destructive: installing a new version of a package does not break existing installations, so many configurations of the same package can coexist.
Spack offers a simple "spec" syntax that allows users to specify versions and configuration options. Package files are written in pure Python, and specs allow package authors to write a single script for many different builds of the same package. With Spack, you can build your software all the ways you want to.
See the Feature Overview for examples and highlights.
To install spack and your first package, make sure you have Python. Then:
$ git clone https://github.com/spack/spack.git
$ cd spack/bin
$ ./spack install libelf
Documentation
Full documentation for Spack is the first place to look.
Try the Spack Tutorial, to learn how to use spack, write packages, or deploy packages for users at your site.
See also:
- Technical paper and slides on Spack's design and implementation.
- Short presentation from the Getting Scientific Software Installed BOF session at Supercomputing 2015.
Get Involved!
Spack is an open source project. Questions, discussion, and contributions are welcome. Contributions can be anything from new packages to bugfixes, or even new core features.
Mailing list
If you are interested in contributing to spack, join the mailing list. We're using Google Groups for this:
Slack channel
Spack has a Slack channel where you can chat about all things Spack:
Sign up here to get an invitation mailed to you.
Contributions
Contributing to Spack is relatively easy. Just send us a
pull request.
When you send your request, make develop the destination branch on the
Spack repository.
Your PR must pass Spack's unit tests and documentation tests, and must be PEP 8 compliant. We enforce these guidelines with Travis CI. To run these tests locally, and for helpful tips on git, see our Contribution Guide.
Spack uses a rough approximation of the
Git Flow
branching model. The develop branch contains the latest
contributions, and master is always tagged and points to the latest
stable release.
Authors
Many thanks go to Spack's contributors.
Spack was created by Todd Gamblin, tgamblin@llnl.gov.
Citing Spack
If you are referencing Spack in a publication, please cite the following paper:
- Todd Gamblin, Matthew P. LeGendre, Michael R. Collette, Gregory L. Lee, Adam Moody, Bronis R. de Supinski, and W. Scott Futral. The Spack Package Manager: Bringing Order to HPC Software Chaos. In Supercomputing 2015 (SC’15), Austin, Texas, November 15-20 2015. LLNL-CONF-669890.
Release
Spack is released under an LGPL license. For more details see the NOTICE and LICENSE files.
LLNL-CODE-647188