This PR implements the concept of "default environment", which doesn't have to be
created explicitly. The aim is to lower the barrier for adopting environments.
To (create and) activate the default environment, run
```
$ spack env activate
```
This mimics the behavior of
```
$ cd
```
which brings you to your home directory.
This is not a breaking change, since `spack env activate` without arguments
currently errors. It is similar to the already existing `spack env activate --temp`
command which always creates an env in a temporary directory, the difference
is that the default environment is a managed / named environment named `default`.
The name `default` is not a reserved name, it's just that `spack env activate`
creates it for you if you don't have it already.
With this change, you can get started with environments faster:
```
$ spack env activate [--prompt]
$ spack install --add x y z
```
instead of
```
$ spack env create default
==> Created environment 'default in /Users/harmenstoppels/spack/var/spack/environments/default
==> You can activate this environment with:
==> spack env activate default
$ spack env activate [--prompt] default
$ spack install --add x y z
```
Notice that Spack supports switching (but not stacking) environments, so the
parallel with `cd` is pretty clear:
```
$ spack env activate named_env
$ spack env status
==> In environment named_env
$ spack env activate
$ spack env status
==> In environment default
```
This adds a `SetupContext` class which is responsible for setting
package.py module globals, and computing the changes to environment
variables for the build, test or run context.
The class uses `effective_deptypes` which takes a list of specs (e.g. single
item of a spec to build, or a list of environment roots) and a context
(build, run, test), and outputs a flat list of specs that affect the
environment together with a flag in what way they do so. This list is
topologically ordered from root to leaf, so that one can be assured that
dependents override variables set by dependencies, not the other way
around.
This is used to replace the logic in `modifications_from_dependencies`,
which has several issues: missing calls to `setup_run_environment`, and
the order in which operations are applied.
Further, it should improve performance a bit in certain cases, since
`effective_deptypes` run in O(v + e) time, whereas `spack env activate`
currently can take up to O(v^2 + e) time due to loops over roots. Each
edge in the DAG is visited once by calling `effective_deptypes` with
`env.concrete_roots()`.
By marking and propagating flags through the DAG, this commit also fixes
a bug where Spack wouldn't call `setup_run_environment` for runtime
dependencies of link dependencies. And this PR ensures that Spack
correctly sets up the runtime environment of direct build dependencies.
Regarding test dependencies: in a build context they are are build-time
test deps, whereas in a test context they are install-time test deps.
Since there are no means to distinguish the build/install type test deps,
they're both.
Further changes:
- all `package.py` module globals are guaranteed to be set before any of the
`setup_(dependent)_(run|build)_env` functions is called
- traversal order during setup: first the group of externals, then the group
of non-externals, with specs in each group traversed topological (dependencies
are setup before dependents)
- modules: only ever call `setup_dependent_run_environment` of *direct* link/run
type deps
- the marker in `set_module_variables_for_package` is dropped, since we should
call the method once per spec. This allows us to set only a cheap subset of
globals on the module: for example it's not necessary to compute the expensive
`cmake_args` and w/e if the spec under consideration is not the root node to be
built.
- `spack load`'s `--only` is deprecated (it has no effect now), and `spack load x`
now means: do everything that's required for `x` to work at runtime, which
requires runtime deps to be setup -- just like `spack env activate`.
- `spack load` no longer loads build deps (of build deps) ...
- `spack env activate` on partially installed or broken environments: this is all
or nothing now. If some spec errors during setup of its runtime env, you'll only
get the unconditional variables + a warning that says the runtime changes for
specs couldn't be applied.
- Remove traversal in upward direction from `setup_dependent_*` in packages.
Upward traversal may iterate to specs that aren't children of the roots
(e.g. zlib / python have hundreds of dependents, only a small fraction is
reachable from the roots. Packages should only modify the direct dependent
they receive as an argument)
`LD_LIBRARY_PATH` can break system executables (e.g., when an enviornment is loaded) and isn't necessary thanks to `RPATH`s. Packages that require `LD_LIBRARY_PATH` can set this in `setup_run_environment`.
- [x] Prefix inspections no longer set `LD_LIBRARY_PATH` by default
- [x] Document changes and workarounds for people who want `LD_LIBRARY_PATH`
See #25249 and https://github.com/spack/spack/pull/27159#issuecomment-958163679.
This adds `spack load --list` as an alias for `spack find --loaded`. The new command is
not as powerful as `spack find --loaded`, as you can't combine it with all the queries or
formats that `spack find` provides. However, it is more intuitively located in the command
structure in that it appears in the output of `spack load --help`.
The idea here is that people can use `spack load --list` for simple stuff but fall back to
`spack find --loaded` if they need more.
- add help to `spack load --list` that references `spack find`
- factor some parts of `spack find` out to be called from `spack load`
- add shell tests
- update docs
Co-authored-by: Peter Josef Scheibel <scheibel1@llnl.gov>
Co-authored-by: Richarda Butler <39577672+RikkiButler20@users.noreply.github.com>
* Deactivate previous env before activating new one
Currently on develop you can run `spack env activate` multiple times to switch
between environments, but they leave traces, even though Spack only supports
one active environment at a time.
Currently:
```console
$ spack env create a
$ spack env create b
$ spack env activate -p a
[a] $ spack env activate -p b
[b] [a] $ spack env activate -p b
[a] [b] [a] $ spack env activate -p a
[a] [b] [c] $ echo $MANPATH | tr ":" "\n"
/path/to/environments/a/.spack-env/view/share/man
/path/to/environments/a/.spack-env/view/man
/path/to/environments/b/.spack-env/view/share/man
/path/to/environments/b/.spack-env/view/man
```
This PR fixes that:
```console
$ spack env activate -p a
[a] $ spack env activate -p b
[b] $ spack env activate -p a
[a] $ echo $MANPATH | tr ":" "\n"
/path/to/environments/a/.spack-env/view/share/man
/path/to/environments/a/.spack-env/view/man
```
Creates an environment in a temporary directory and activates it, which
is useful for a quick ephemeral environment:
```
$ spack env activate -p --temp
[spack-1a203lyg] $ spack add zlib
==> Adding zlib to environment /tmp/spack-1a203lyg
==> Updating view at /tmp/spack-1a203lyg/.spack-env/view
```
- [x] add `concretize.lp`, `spack.yaml`, etc. to licensed files
- [x] update all licensed files to say 2013-2021 using
`spack license update-copyright-year`
- [x] appease mypy with some additions to package.py that needed
for oneapi.py
* share/spack/setup-env.fish file to setup environment in fish shell
* setup-env.fish testing script
* Update share/spack/setup-env.fish
Co-Authored-By: Elsa Gonsiorowski, PhD <gonsie@me.com>
* Update share/spack/qa/setup-env-test.fish
Co-Authored-By: Adam J. Stewart <ajstewart426@gmail.com>
* updates completions using `spack commands --update-completion`
* added stderr-nocaret warning
* added fish shell tests to CI system
Co-authored-by: becker33 <becker33@llnl.gov>
Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>
Co-authored-by: Elsa Gonsiorowski, PhD <gonsie@me.com>
