This PR makes it possible to select only a subset of virtual dependencies from a spec that _may_ provide more. To select providers, a syntax to specify edge attributes is introduced:
```
hdf5 ^[virtuals=mpi] mpich
```
With that syntax we can concretize specs like:
```console
$ spack spec strumpack ^[virtuals=mpi] intel-parallel-studio+mkl ^[virtuals=lapack] openblas
```
On `develop` this would currently fail with:
```console
$ spack spec strumpack ^intel-parallel-studio+mkl ^openblas
==> Error: Spec cannot include multiple providers for virtual 'blas'
Requested 'intel-parallel-studio' and 'openblas'
```
In package recipes, virtual specs that are declared in the same `provides` directive need to be provided _together_. This means that e.g. `openblas`, which has:
```python
provides("blas", "lapack")
```
needs to provide both `lapack` and `blas` when requested to provide at least one of them.
## Additional notes
This capability is needed to model compilers. Assuming that languages are treated like virtual dependencies, we might want e.g. to use LLVM to compile C/C++ and Gnu GCC to compile Fortran. This can be accomplished by the following[^1]:
```
hdf5 ^[virtuals=c,cxx] llvm ^[virtuals=fortran] gcc
```
[^1]: We plan to add some syntactic sugar around this syntax, and reuse the `%` sigil to avoid having a lot of boilerplate around compilers.
Modifications:
- [x] Add syntax to interact with edge attributes from spec literals
- [x] Add concretization logic to be able to cherry-pick virtual dependencies
- [x] Extend semantic of the `provides` directive to express when virtuals need to be provided together
- [x] Add unit-tests and documentation
* vcftools: adding new version 0.1.16
* Update var/spack/repos/builtin/packages/vcftools/package.py
Co-authored-by: Alec Scott <alec@bcs.sh>
---------
Co-authored-by: Alec Scott <alec@bcs.sh>
* Make sure sio is in dependent build env for podio
* podio: Fix likely(?) typo in root dependency
* podio: Add latest tag and new variants + dependencies
* podio: Add v00-16-07 tag
* podio: Fix dependencies flagged by package audit
* podio: Simplify root dependency
* podio: Add 0.17.1 tag
Allowing white space around `:` in version ranges introduces an ambiguity:
```
a@1: b
```
parses as `a@1:b` but should really be parsed as two separate specs `a@1:` and `b`.
With white space disallowed around `:` in ranges, the ambiguity is resolved.
Call setup_dependent_run_environment on both link and run edges,
instead of only run edges, which restores old behavior.
Move setup_build_environment into get_env_modifications
Also call setup_run_environment on direct build deps, since their run
environment has to be set up.
* update SPERR package
* remove blank line
* update SPERR to be version 0.7.1
* a little clean up
* bound versions that require zstd
* add USE_ZSTD
* add libpressio-sperr version upbound
* update libpressio-sperr
* address review comments
* improve format
---------
Co-authored-by: Samuel Li <Sam@Navada>
Co-authored-by: Samuel Li <sam@cisl-m121a>
* Add tests to ensure variant propagation syntax can round-trip to/from string
* Add a regression test for the bug in 35298
* Reconstruct the spec constraints in the worker process
Specs do not preserve any information on propagation of variants
when round-tripping to/from JSON (which we use to pickle), but
preserve it when round-tripping to/from strings.
Therefore, we pass a spec literal to the worker and reconstruct
the Spec objects there.
