fixes#40791
Currently stacks behave differently if used in unify:false
environments, which leads to inconsistencies during concretization.
For instance, we might have two abstract user specs that do not
intersect with each other map to the same concrete spec in the
environment. This is clearly wrong.
This PR removes the best effort expansion, so that user specs
are always applied strictly.
This PR simplifies the code doing external spec detection by removing
the `DetectedPackage` class. Now, functions accepting or returning lists
of `DetectedPackage`, will accept or return list of specs.
Performance doesn't seem to change if we use `Spec.__reduce__` instead
of `DetectionPackage.__reduce__`.
Change the signature of Spec.from_detection to set the
external prefix, and the external modules, if they are
present.
Delete "spack.package_prefs.spec_externals" since it
is unused.
This context manager was used to prevent detecting a platform
as "cray". Since now Cray machines are detected as linux, we can
remove the context manager.
Right now if you run `spack ci generate` you get a warning about CDash credentials even
if there's no CDash configuration specified. We should only warn if there was actually a
CDash config.
Signed-off-by: Todd Gamblin <tgamblin@llnl.gov>
Source mirrors store entries by digest and add a human readable alias of the
form 'name-version'. If no digest is available, the alias is used as the primary
storage location.
Spack erroneously fetches by alias when the digest path does not exist. This is
problematic if `version(..., sha256=...)` changes in package.py, and the mirror
is populated with the old shasum. That would result in an error when a digest
is available, but in case of git versions with a modified commit sha, the wrong
sources would be fetched without error. With this PR, only the digest path is
used, not the alias, in case a digest is available. This is also a small performance
optimization, as the number of request is halved for mirrors that don't contain
the sources.
Further, for git sources the tag was used as a digest, but this is a moving
target. Only commit sha is used now.
Also whenever the alias already existed, Spack used to keep it in place when
updating the mirror cache, which means that aliases would always point to
outdated mirror entries whenever digests are modified. With this PR the alias
is moved in place.
Lastly, fix a recent regression where `Stage.disable_mirrors` disabled mirrors
but not the local download cache, which was the intention.
* Add missing MultiMethodMeta metaclass in builders
and remove the Python 2 fallback option in favor of hard errors to catch
similar issues going forward.
The fallback option can cause about 10K stat calls due to use of
`realpath` in the inspect module, depending on how deep Spack itself is
nested in the file system, which is ... undesirable.
* code shuffling to avoid circular import
* more reshuffling
* move reserved variant names into variants module
* Adds an MSBuild system + Builder to the icu4c package
* Adds custom install method as MSBuild system does not vendor an
install target
* The cxxstd variant is not supported on Windows (there are no config
options you use to tell the build system what cxx standard to
build against), so the variant definition was updated to occur
everywhere except Windows
Also, this commit defines the c/cxx..._flag properties of the MSVC
compiler (although they are not used by `icu4c` and not strictly
necessary to bundle with this PR).
