Commit Graph

355 Commits

Author SHA1 Message Date
Vanessasaurus
3cef5663d8
adding json export for spack blame (#23417)
I would like to be able to export (and save and then load programatically)
spack blame metadata, so this commit adds a spack blame --json argument,
along with developer docs for it

Signed-off-by: vsoch <vsoch@users.noreply.github.com>

Co-authored-by: vsoch <vsoch@users.noreply.github.com>
2021-05-25 12:40:08 -06:00
Vanessasaurus
b44bb952eb
first set of work to allow for saving local results with spack monitor (#23804)
This work will come in two phases. The first here is to allow saving of a local result
with spack monitor, and the second will add a spack monitor command so the user can
do spack monitor upload.

Signed-off-by: vsoch <vsoch@users.noreply.github.com>

Co-authored-by: vsoch <vsoch@users.noreply.github.com>
2021-05-25 11:29:34 -07:00
vsoch
f2b362b5b3 adding support to tag a build
This will be useful to run multiple build experiments and organize by name

Signed-off-by: vsoch <vsoch@users.noreply.github.com>
2021-05-19 07:01:18 -07:00
Harmen Stoppels
8446bebdd9
Revert "Separable module configurations (#22588)" (#23674)
This reverts commit cefbe48c89.
2021-05-17 06:42:48 -07:00
Greg Becker
cefbe48c89
Separable module configurations (#22588)
Currently, module configurations are inconsistent because modulefiles are generated with the configs for the active environment, but are shared among all environments (and spack outside any environment).

This PR fixes that by allowing Spack environments (or other spack config scopes) to define additional sets of modules to generate. Each set of modules can enable either lmod or tcl modules, and contains all of the previously available module configuration. The user defines the name of each module set -- the set configured in Spack by default is named "default", and is the one returned by module manipulation commands in the absence of user intervention.

As part of this change, the module roots configuration moved from the `config` section to inside each module configuration.

Additionally, it adds a feature that the modulefiles for an environment can be configured to be relative to an environment view rather than the underlying prefix. This will not be enabled by default, as it should only be enabled within an environment and for non-default views constructed with separate projections per-spec.

TODO:
- [x] code changes to support multiple module sets
- [x] code changes to support modules relative to a view
- [x] Tests for multiple module configurations
- [x] Tests for modules relative to a view
- [x] Backwards compatibility for module roots from config section
- [x] Backwards compatibility for default module set without the name specified
- [x] Tests for backwards compatibility
2021-05-14 15:03:28 -07:00
Scott Wittenburg
91de23ce65 install cmd: --no-add in an env installs w/out concretize and add
In an active concretize environment, support installing one or more
cli specs only if they are already present in the environment.  The
`--no-add` option is the default for root specs, but optional for
dependency specs.  I.e. if you `spack install <depspec>` in an
environment, the dependency-only spec `depspec` will be added as a
root of the environment before being installed.  In addition,
`spack install --no-add <spec>` fails if it does not find an
unambiguous match for `spec`.
2021-05-07 10:07:53 -07:00
Tim Haines
cad06a15e0
Dyninst: add elfutils versioning (#19648) 2021-04-27 07:15:37 -05:00
Tim Haines
c23ffd89ff
Dyninst: Add dependencies for v11.0.0 (#23121)
Also update the mpileaks unit test to avoid a conflict on CentOS 6
where Dyninst >=11.0.0 no longer builds due to a compiler version
conflict.
2021-04-26 13:53:53 -07:00
Chuck Atkins
7317b04318
ci: Remove leftover duplicate gitlab yaml (#23248) 2021-04-26 16:42:15 +00:00
Chuck Atkins
e3054c3318
ci: Generalize the GitLab CI pipeline yaml (#23225)
* ci: Generalize the GitLab CI pipeline yaml

* ci: Rename cloud_e4s_pipelines to the more general cloud_pipelines
2021-04-26 08:13:16 -06:00
Vanessasaurus
7f91c1a510
Merge pull request #21930 from vsoch/add/spack-monitor
This provides initial support for [spack monitor](https://github.com/spack/spack-monitor), a web application that stores information and analysis about Spack installations.  Spack can now contact a monitor server and upload analysis -- even after a build is already done.

Specifically, this adds:
- [x] monitor options for `spack install`
- [x] `spack analyze` command
- [x] hook architecture for analyzers
- [x] separate build logs (in addition to the existing combined log)
- [x] docs for spack analyze
- [x] reworked developer docs, with hook docs
- [x] analyzers for:
  - [x] config args
  - [x] environment variables
  - [x] installed files
  - [x] libabigail

There is a lot more information in the docs contained in this PR, so consult those for full details on this feature.

Additional tests will be added in a future PR.
2021-04-15 00:38:36 -07:00
Gregory Becker
c4141e16a7 update tutorial public key 2021-04-14 23:53:07 -07:00
Harmen Stoppels
8b16728fd9
Add "spack [cd|location] --source-dir" (#22321) 2021-03-29 17:31:24 +02:00
Massimiliano Culpo
629f94b4e1
CI: drastically reduce the number of tests for package only PRs (#22410)
PRs that change only package recipes will only run tests under "package_sanity.py" and without coverage. This should result in a huge drop the cpu-time spent in CI for most PRs.
2021-03-19 11:04:53 -07:00
Harmen Stoppels
15645147ed
Tab to spaces (#22362) 2021-03-18 06:20:06 +00:00
Massimiliano Culpo
b304b4bdb0
Speed-up CI by reorganizing tests (#22247)
* unit tests: mark slow tests as "maybeslow"

This commit also removes the "network" marker and
marks every "network" test as "maybeslow". Tests
marked as db are maintained, but they're not slow
anymore.

* GA: require style tests to pass before running unit-tests

* GA: make MacOS unit tests fail fast

* GA: move all unit tests into the same workflow, run style tests as a prerequisite

All the unit tests have been moved into the same workflow so that a single
run of the dorny/paths-filter action can be used to ask for coverage based
on the files that have been changed in a PR. The basic idea is that for PRs
that introduce only changes to packages coverage is not necessary, this
resulting in a faster execution of the tests.

Also, for package only PRs slow unit tests are skipped.

Finally, MacOS and linux unit tests are now conditional on style tests passing
meaning that e.g. we won't waste a MacOS worker if we know that the PR has
flake8 issues.

* Addressed review comments

* Skipping slow tests on MacOS for package only recipes

* QA: make tests on changes correct before merging
2021-03-16 08:16:31 -07:00
Harmen Stoppels
195341113e
Expand relative dev paths in environment files (#22045)
* Rewrite relative dev_spec paths internally to absolute paths in case of relocation of the environment file

* Test relative paths for dev_path in environments

* Add a --keep-relative flag to spack env create

This ensures that relative paths of develop paths are not expanded to
absolute paths when initializing the environment in a different location
from the spack.yaml init file.
2021-03-15 15:38:35 -05:00
Harmen Stoppels
4f1d9d6095
Propagate --test= for environments (#22040)
* Propagate --test= for environments

* Improve help comment for spack concretize --test flag

* Add tests for --test with environments
2021-03-15 15:34:18 -05:00
Vanessasaurus
746081e933
adding spack -c to set one off config arguments (#22251)
This pull request will add the ability for a user to add a configuration argument on the fly, on the command line, e.g.,:

```bash
$ spack -c config:install_tree:root:/path/to/config.yaml -c packages:all:compiler:[gcc] list --help
```
The above command doesn't do anything (I'm just getting help for list) but you can imagine having another root of packages, and updating it on the fly for a command (something I'd like to do in the near future!)

I've moved the logic for config_add that used to be in spack/cmd/config.py into spack/config.py proper, and now both the main.py (where spack commands live) and spack/cmd/config.py use these functions. I only needed spack config add, so I didn't move the others. We can move the others if there are also needed in multiple places.
2021-03-13 05:31:26 +00:00
Danny McClanahan
f0275e84ad
fix setup-env.sh on older linux zsh (#21721) 2021-03-10 09:44:50 -08:00
Todd Gamblin
8d3272f82d
spack python: add --path option (#22006)
This adds a `--path` option to `spack python` that shows the `python`
interpreter that Spack is using.

e.g.:

```console
$ spack python --path
/Users/gamblin2/src/spack/var/spack/environments/default/.spack-env/view/bin/python
```

This is useful for debugging, and we can ask users to run it to
understand what python Spack is picking up via preferences in `bin/spack`
and via the `SPACK_PYTHON` environment variable introduced in #21222.
2021-03-07 13:37:26 -08:00
Todd Gamblin
7aa5cc241d
add spack test list --all (#22032)
`spack test list` will show you which *installed* packages can be tested
but it won't show you which packages have tests.

- [x] add `spack test list --all` to show which packages have test methods
- [x] update `has_test_method()` to handle package instances *and*
      package classes.
2021-03-07 11:44:17 -08:00
Massimiliano Culpo
10e9e142b7
Bootstrap clingo from sources (#21446)
* Allow the bootstrapping of clingo from sources

Allow python builds with system python as external
for MacOS

* Ensure consistent configuration when bootstrapping clingo

This commit uses context managers to ensure we can
bootstrap clingo using a consistent configuration
regardless of the use case being managed.

* Github actions: test clingo with bootstrapping from sources

* Add command to inspect and clean the bootstrap store

 Prevent users to set the install tree root to the bootstrap store

* clingo: documented how to bootstrap from sources

Co-authored-by: Gregory Becker <becker33@llnl.gov>
2021-03-03 09:37:46 -08:00
Scott Wittenburg
704eadbda1
Temporarily reduce pr stack size (#21998)
Gitlab pipelines fixes

* add arch tag to avoid picking up UO power9 runners
* temporarily reduce PR workload
2021-02-27 09:43:29 -07:00
Paul Ferrell
e85a8cde37
Config prefer upstream (#21487)
This allows for quickly configuring a spack install/env to use upstream packages by default. This is particularly important when upstreaming from a set of officially supported spack installs on a production cluster. By configuring such that package preferences match the upstream, you ensure maximal reuse of existing package installations.
2021-02-24 10:57:50 -08:00
Scott Wittenburg
ee5992783c
Gitlab fix pr workflow (#21786)
Fixes for gitlab pipelines

* Remove accidentally retained testing branch name
* Generate pipeline w/out debug mode
* Make jobs interruptible for auto-cancel pending
* Work around concretization conflicts
2021-02-23 19:19:06 -07:00
Harmen Stoppels
0664b90751
Drop compiler variables from spack load (#21699)
Drops:

* C_INCLUDE_PATH
* CPLUS_INCLUDE_PATH
* LIBRARY_PATH
* INCLUDE

We already decided to use C_INCLUDE_PATH, CPLUS_INCLUDE_PATH, INCLUDE over CPATH here:

https://github.com/spack/spack/pull/14749

However, none of these flags apply to Fortran on Linux. So for consistency it seems better to make the user use -I and -L flags by hand or through pkgconfig.
2021-02-23 13:35:19 +01:00
Scott Wittenburg
6b509a95da
Pipelines: Move PR testing stacks (currently only E4S) into spack (#21714) 2021-02-18 18:50:57 -07:00
Severin Strobl
0da2b82df2
Fixed conditional in match_flag for fish env (#21679)
An attempt to fix the conditional was made in 5a771bc8ad, yet this broke
the conditional completely.
2021-02-18 23:29:23 +00:00
Scott Wittenburg
5b0507cc65
Pipelines: Temporary buildcache storage (#21474)
Before this change, in pipeline environments where runners do not have access
to persistent shared file-system storage, the only way to pass buildcaches to
dependents in later stages was by using the "enable-artifacts-buildcache" flag
in the gitlab-ci section of the spack.yaml.  This change supports a second
mechanism, named "temporary-storage-url-prefix", which can be provided instead
of the "enable-artifacts-buildcache" feature, but the two cannot be used at the
same time.  If this prefix is provided (only "file://" and "s3://" urls are
supported), the gitlab "CI_PIPELINE_ID" will be appended to it to create a url
for a mirror where pipeline jobs will write buildcache entries for use by jobs
in subsequent stages.  If this prefix is provided, a cleanup job will be
generated to run after all the rebuild jobs have finished that will delete the
contents of the temporary mirror.  To support this behavior a new mirror
sub-command has been added: "spack mirror destroy" which can take either a
mirror name or url.

This change also fixes a bug in generation of "needs" list for each job.  Each
jobs "needs" list is supposed to only contain direct dependencies for scheduling
purposes, unless "enable-artifacts-buildcache" is specified.  Only in that case
are the needs lists supposed to contain all transitive dependencies.  This
changes fixes a bug that caused the needs lists to always contain all transitive
dependencies, regardless of whether or not "enable-artifacts-buildcache" was
specified.
2021-02-16 18:21:18 -07:00
Chuck Atkins
2870cc4c92
Add RHEL8 Universal Base Image with platform-python to CI unit tests (#21655) 2021-02-16 13:49:05 -05:00
Scott Wittenburg
428f831899
Pipelines: DAG Pruning (#20435)
Pipelines: DAG pruning

During the pipeline generation staging process we check each spec against all configured mirrors to determine whether it is up to date on any of the mirrors.  By default, and with the --prune-dag argument to "spack ci generate", any spec already up to date on at least one remote mirror is omitted from the generated pipeline.  To generate jobs for up to date specs instead of omitting them, use the --no-prune-dag argument.  To speed up the pipeline generation process, pass the --check-index-only argument.  This will cause spack to check only remote buildcache indices and avoid directly fetching any spec.yaml files from mirrors.  The drawback is that if the remote buildcache index is out of date, spec rebuild jobs may be scheduled unnecessarily.

This change removes the final-stage-rebuild-index block from gitlab-ci section of spack.yaml.  Now rebuilding the buildcache index of the mirror specified in the spack.yaml is the default, unless "rebuild-index: False" is set.  Spack assigns the generated rebuild-index job runner attributes from an optional new "service-job-attributes" block, which is also used as the source of runner attributes for another generated non-build job, a no-op job, which spack generates to avoid gitlab errors when DAG pruning results in empty pipelines.
2021-02-16 09:12:37 -07:00
Chuck Atkins
5a771bc8ad
Introduce a SPACK_PYTHON environment variable (#21222)
The SPACK_PYTHON environment variable can be set to a python interpreter to be
used by the spack command.  This allows the spack command itself to use a
consistent and separate interpreter from whatever python might be used for package
building.
2021-02-12 10:52:44 -08:00
Adam J. Stewart
7ccb9992a6
Procedure to deprecate old versions of software (#20767)
* Procedure to deprecate old versions of software

* Add documentation

* Fix bug in logic

* Update tab completion

* Deprecate legacy packages

* Deprecate old mxnet as well

* More explicit docs
2021-02-09 13:51:18 -05:00
Massimiliano Culpo
694d633a2c
spack external find: allow to search by tags (#21407)
This commit adds an option to the `external find`
command that allows it to search by tags. In this
way group of executables with common purposes can
be grouped under a single name and a simple command
can be used to detect all of them.

As an example introduce the 'build-tools' tag to
search for common development tools on a system
2021-02-04 13:17:32 +01:00
Adam J. Stewart
aa8e026242
spack setup: remove the command for v0.17.0 (#20277)
spack setup was deprecated in 0.16 and will be removed in 0.17

Follow-up to #18240
2021-01-27 09:24:09 +01:00
Jamie Finney
3f0f79d2c9
Remove ascent gitlab trigger (#20755)
Remove the ORNL Ascent gitlab trigger 

CI will now be done internally via periodic builds.
2021-01-08 12:57:50 -07:00
Vanessasaurus
67ce1939a3
spack python: allow use of IPython (#20329)
This adds a -i option to "spack python" which allows use of the
IPython interpreter; it can be used with "spack python -i ipython".
This assumes it is available in the Python instance used to run
Spack (i.e. that you can "import IPython").
2021-01-05 16:54:47 -08:00
Todd Gamblin
a8ccb8e116 copyrights: update all files with license headers for 2021
- [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
2021-01-02 12:12:00 -08:00
Todd Gamblin
78f39bdfee commands: add spack license update-copyright-year
This adds a new subcommand to `spack license` that automatically updates
the copyright year in files that should have a license header.

- [x] add `spack license update-copyright-year` command
- [x] add test
2021-01-02 12:12:00 -08:00
Adam J. Stewart
a4accff266
PythonPackage: url -> pypi (#20610)
* Convert all `url` attributes in `PythonPackage`s to `pypi` attributes
* add `pypi =` to flake8 exceptions
2020-12-29 16:44:04 -08:00
Tom Scogland
857749a9ba
add mypy to style checks; rename spack flake8 to spack style (#20384)
I lost my mind a bit after getting the completion stuff working and
decided to get Mypy working for spack as well. This adds a 
`.mypy.ini` that checks all of the spack and llnl modules, though
not yet packages, and fixes all of the identified missing types and
type issues for the spack library.

In addition to these changes, this includes:

* rename `spack flake8` to `spack style`

Aliases flake8 to style, and just runs flake8 as before, but with
a warning.  The style command runs both `flake8` and `mypy`,
in sequence. Added --no-<tool> options to turn off one or the
other, they are on by default.  Fixed two issues caught by the tools.

* stub typing module for python2.x

We don't support typing in Spack for python 2.x. To allow 2.x to
support `import typing` and `from typing import ...` without a
try/except dance to support old versions, this adds a stub module
*just* for python 2.x.  Doing it this way means we can only reliably
use all type hints in python3.7+, and mypi.ini has been updated to
reflect that.

* add non-default black check to spack style

This is a first step to requiring black.  It doesn't enforce it by
default, but it will check it if requested.  Currently enforcing the
line length of 79 since that's what flake8 requires, but it's a bit odd
for a black formatted project to be quite that narrow.  All settings are
in the style command since spack has no pyproject.toml and I don't
want to add one until more discussion happens. Also re-format
`style.py` since it no longer passed the black style check
with the new length.

* use style check in github action

Update the style and docs action to use `spack style`, adding in mypy
and black to the action even if it isn't running black right now.
2020-12-22 21:39:10 -08:00
Tom Scogland
c1e4f3e131
Refactor flake8 handling and tool compatibility (#20376)
This PR does three related things to try to improve developer tooling quality of life:

1. Adds new options to `.flake8` so it applies the rules of both `.flake8` and `.flake_package` based on paths in the repository.
2. Adds a re-factoring of the `spack flake8` logic into a flake8 plugin so using flake8 directly, or through editor or language server integration, only reports errors that `spack flake8` would.
3. Allows star import of `spack.pkgkit` in packages, since this is now the thing that needs to be imported for completion to work correctly in package files, it's nice to be able to do that.

I'm sorely tempted to sed over the whole repository and put `from spack.pkgkit import *` in every package, but at least being allowed to do it on a per-package basis helps.

As an example of what the result of this is:

```
~/Workspace/Projects/spack/spack develop* ⇣
❯ flake8 --format=pylint ./var/spack/repos/builtin/packages/kripke/package.py
./var/spack/repos/builtin/packages/kripke/package.py:6: [F403] 'from spack.pkgkit import *' used; unable to detect undefined names
./var/spack/repos/builtin/packages/kripke/package.py:25: [E501] line too long (88 > 79 characters)

~/Workspace/Projects/spack/spack refactor-flake8*
1 ❯ flake8 --format=spack ./var/spack/repos/builtin/packages/kripke/package.py

~/Workspace/Projects/spack/spack refactor-flake8*
❯ flake8 ./var/spack/repos/builtin/packages/kripke/package.py
```

* qa/flake8: update .flake8, spack formatter plugin

Adds:
* Modern flake8 settings for per-path/glob error ignores, allows
  packages to use the same `.flake8` as the rest of spack
* A spack formatter plugin to flake8 that implements the behavior of
  `spack flake8` for direct invocations.  Makes integration with
  developer tooling nicer, linting with flake8 reports only errors that
  `spack flake8` would report.  Using pyls and pyls-flake8, or any other
  non-format-dependent flake8 integration, now works with spack's rules.

* qa/flake8: allow star import of spack.pkgkit

To get working completion of directives and spack components it's
necessary to import the contents of spack.pkgkit.  At the moment doing
this makes flake8 displeased.  For now, allow spack.pkgkit and spack
both, next step is to ban spack * and require spack.pkgkit *.

* first cut at refactoring spack flake8

This version still copies all of the files to be checked as befire, and
some other things that probably aren't necessary, but it relies on the
spack formatter plugin to implement the ignore logic.

* keep flake8 from rejecting itself

* remove separate packages flake8 config

* fix failures from too many files

I ran into this in the PR converting pkgkit to std.  The solution in
that branch does not work in all cases as it turns out, and all the
workarounds I tried to use generated configs to get a single invocation
of flake8 with a filename optoion to work failed.  It's an astonishingly
frustrating config option.

Regardless, this removes all temporary file creation from the command
and relies on the plugin instead.  To work around the huge number of
files in spack and still allow the command to control what gets checked,
it scans files in batches of 100.  This is a completely arbitrary number
but was chosen to be safely under common line-length limits.  One
side-effect of this is that every 100 files the command will produce
output, rather than only at the end, which doesn't seem like a terrible
thing.
2020-12-22 09:28:46 -08:00
Tom Scogland
71c77fa8fa
minimal zsh completion (#20253)
Since zsh can load bash completion files natively, seems reasonable to just turn this on.
The only changes are to switch from `type -t` which zsh doesn't support to using `type`
with a regex and adding a new arm to the sourcing of the completions to allow it to work
for zsh as well as bash.

Could use more bash/dash/etc testing probably, but everything I've thought to try has
worked so far.

Notes:
* unit-test zsh support, fix issues
Specifically fixed word splitting in completion-test, use a different
method to apply sh emulation to zsh loaded bash completion, and fixed
an incompatibility in regex operator quoting requirements.

* compinit now ignores insecure directories
Completion isn't meant to be enabled in non-interactive environments, so
by default compinit will ask the user if they want to ignore insecure
directories or load them anyway.  To pass the spack unit tests in GH
actions, this prompt must be disabled, so ignore explicitly until a
better solution can be found.

* debug functions test also requires bash emulation
COMP_WORDS is a bash-ism that zsh doesn't natively support, turn on
emulation for just that section of tests to allow the comparison to
work.  Does not change the behavior of the functions themselves since
they are already pinned to sh emulation elsewhere.

* propagate change to .in file

* fix comment and update script based on .in
2020-12-18 17:26:15 -08:00
Christian Kniep
e4bb85cd27
Add amazonlinux (x86/arm) dockerfile (#20320)
Co-authored-by: Christian Kniep <kniec@amazon.com>
2020-12-11 11:11:33 +01:00
vvolkl
ed258ca9e9
Add "spack versions --new" flag to only show new versions (#20030)
* [cmd versions] add spack versions --new flag to only fetch new versions

format

[cmd versions] rename --latest to --newest and add --remote-only

[cmd versions] add tests for --remote-only and --new

format

[cmd versions] update shell tab completion

[cmd versions] remove test for --remote-only --new which gives empty output

[cmd versions] final rename

format

* add brillig mock package

* add test for spack versions --new

* [brillig] format

* [versions] increase test coverage

* Update lib/spack/spack/cmd/versions.py

Co-authored-by: Massimiliano Culpo <massimiliano.culpo@gmail.com>

* Update lib/spack/spack/cmd/versions.py

Co-authored-by: Massimiliano Culpo <massimiliano.culpo@gmail.com>

Co-authored-by: Massimiliano Culpo <massimiliano.culpo@gmail.com>
2020-12-07 09:29:10 -06:00
eugeneswalker
badf3368ad
allow install of build-deps from cache via --include-build-deps switch (#19955)
* allow install of build-deps from cache via --include-build-deps switch

* make clear that --include-build-deps is useful for CI pipeline troubleshooting
2020-12-03 15:27:01 -08:00
Christian Goll
235558df11
dockerfiles: add dockerfile for opensuse leap 15 (#20091)
* added dockerfile for opensuse leap 15
* updated maintainer info
* Update share/spack/docker/leap-15.dockerfile
* move copies and symlinks after package install
also use ${SPACK_ROOT} for spack calls as
this works with buildah

Co-authored-by: Massimiliano Culpo <massimiliano.culpo@gmail.com>
2020-12-01 14:03:35 -08:00
Shahzeb Siddiqui
f30aeb35ae
[WIP] nersc e4s pipeline trigger (#19688)
* nersc e4s pipeline trigger

* Update nersc_pipeline.yml

* Update nersc_pipeline.yml
2020-11-20 13:31:25 -08:00
Michael Kuhn
20367e472d
cmd: add spack mark command (#16662)
This adds a new `mark` command that can be used to mark packages as either
explicitly or implicitly installed. Apart from fixing the package
database after installing a dependency manually, it can be used to
implement upgrade workflows as outlined in #13385.

The following commands demonstrate how the `mark` and `gc` commands can be
used to only keep the current version of a package installed:
```console
$ spack install pkgA
$ spack install pkgB
$ git pull # Imagine new versions for pkgA and/or pkgB are introduced
$ spack mark -i -a
$ spack install pkgA
$ spack install pkgB
$ spack gc
```

If there is no new version for a package, `install` will simply mark it as
explicitly installed and `gc` will not remove it.

Co-authored-by: Greg Becker <becker33@llnl.gov>
2020-11-18 03:20:56 -08:00