The spack extension of C2SM and MCH

Spack is the package manager used by C2SM and MeteoSwiss to install and deploy software on supercomputers, local machines and the cloud.

Documentations

Infos about c2sm-supported software and machines

• spack-c2sm latest
• spack-c2sm v0.20.1.4
• spack-c2sm v0.20.1.3
• spack-c2sm v0.20.1.0
• spack-c2sm v0.18.x [deprecated]

General infos about spack

• Official spack v0.21.1
• Official spack v0.20.1
• Official spack v0.18.1 [deprecated]

The first 3 numbers of every spack-c2sm version match with the version of spack it uses as a submodule.

Workflow

We suggest local/individual spack instances and the use of spack environments.

Clone the repository

git clone --depth 1 --recurse-submodules --shallow-submodules -b v0.21.1.3 https://github.com/C2SM/spack-c2sm.git

Setup the shell environment and optionally specify an upstream, where spack will look for installed software, i.e.

. spack-c2sm/setup-env.sh
. spack-c2sm/setup-env.sh /user-environment
. spack-c2sm/setup-env.sh /mch-environment/v6
. spack-c2sm/setup-env.sh /mch-environment/v7

Sourcing this file will put the spack command in your PATH, set up your MODULEPATH to use Spack’s packages, and add other useful shell integration for certain commands, environments, and modules. For bash, it also sets up tab completion. (source: spack docu)

Optionally activate a spack environment

spack env activate <path_to_env>

and starts exploring

spack info <package>
spack spec <spec>

and installing

spack install <spec>
spack dev-build <spec>

packages.

Updating spack-c2sm is in the hands of the user.

git pull
git submodule update --recursive

Before an update we advice to clean your instance

spack uninstall -a
spack clean -a
rm -rf ~/.spack

After an update we advice to rebuild packages, preferably in a new shell so that no outdated shell variables are retained.

Command cheat sheet

	Command
Clone	git clone --depth 1 --recurse-submodules --shallow-submodules -b <branch/tag> https://github.com/C2SM/spack-c2sm.git
Update	git pull git submodule update --recursive
Load	. spack-c2sm/setup-env.sh to run without an upstream or . spack-c2sm/setup-env.sh /user-environment to use /user-environment as an upsream spack compiler find autodetects compilers spack external find --all autodetects externally installed packages
Clean	spack uninstall -a uninstalls all packages spack clean -a cleans all misc caches

Spec syntax: <package>@<version>%<compiler>+<variant> ~<variant>^<sub-package> +<sub-package-variant><compiler flags>

	Command
Find	spack find lists all installed packages. spack find <spec> lists all installed packages that match the spec.
Info	spack info <package>
Spec	spack spec <spec> concretizes abstract spec (unspecfied variant = any) Spack is not required to use the default of an unspecified variant. The default value is only a tiebreaker for the concretizer.
Install	spack install <spec>
Locate	spack location --install-dir <spec> prints location of all installs that satisfy the spec
Load env	spack load <spec> loads run environment
Activate env	spack env activate <env_name>
Deactivate env	spack deactivate