The default (implied) behavior for all environments, as of ea1de6b,
is that an environment will maintain a view in a location of its
choosing. ea1de6b explicitly recorded all three possible states of
maintaining a view:
1. Maintain a view, and let the environment decide where to put it
(default)
2. Maintain a view, and let the user decide
3. Don't maintain a view
This commit updates the config writer so that for case [1], nothing
will be written to the config.yaml. This will not change any existing
behavior, it just serves to keep the config more compact.
* Add versions 1.4.0, 1.3.0, and 1.2.0
* Add dependencies and update constraints (e.g. version 1.4.0 of
precice requires a later version of boost)
* Add maintainers
Still look for BASH_SOURCE[0] first, but if it's not set,
_sp_source_file is initialized to an empty value addressing the
unset parameter error (line 217).
A Spack hack for MKL usage was needed in QMCPACK prior to version 3.5
when non-Intel compilers were used. This Spack hack could have
undesirable side-effects and led to ugly code that was extra work to
maintain. For older versions of QMCPACK, we throw a conflict if you
want to use Intel MKL with the other compilers commonly found on x86.
Note that there is no impact to version of QMCPACK since 3.5.
Compilers are treated separately from other dependencies in Spack.
#10761 added the option to automatically install compilers when a
package specifies using a compiler that is not available in Spack.
However, this did not work correctly for dependency packages (it
would only build a compiler for the root of an install DAG). This
commit enables the building of compilers for dependency packages.
Environments are nowm by default, created with views. When activated, if an environment includes a view, this view will be added to `PATH`, `CPATH`, and other shell variables to expose the Spack environment in the user's shell.
Example:
```
spack env create e1 #by default this will maintain a view in the directory Spack maintains for the env
spack env create e1 --with-view=/abs/path/to/anywhere
spack env create e1 --without-view
```
The `spack.yaml` manifest file now looks like this:
```
spack:
specs:
- python
view: true #or false, or a string
```
These commands can be used to control the view configuration for the active environment, without hand-editing the `spack.yaml` file:
```
spack env view enable
spack env view envable /abs/path/to/anywhere
spack env view disable
```
Views are automatically updated when specs are installed to an environment. A view only maintains one copy of any package. An environment may refer to a package multiple times, in particular if it appears as a dependency. This PR establishes a prioritization for which environment specs are added to views: a spec has higher priority if it was concretized first. This does not necessarily exactly match the order in which specs were added, for example, given `X->Z` and `Y->Z'`:
```
spack env activate e1
spack add X
spack install Y # immediately concretizes and installs Y and Z'
spack install # concretizes X and Z
```
In this case `Z'` will be favored over `Z`.
Specs in the environment must be concrete and installed to be added to the view, so there is another minor ordering effect: by default the view maintained for the environment ignores file conflicts between packages. If packages are not installed in order, and there are file conflicts, then the version chosen depends on the order.
Both ordering issues are avoided if `spack install`/`spack add` and `spack install <spec>` are not mixed.
* Fix bug when system perl is used.
If system perl is being used through packages.yaml there cannot be dependent modules.
The setup_dependent_packages function should not do anything in that case.
