spack.container package

Package that provides functions and classes to generate container recipes from a Spack environment

spack.container.recipe(configuration, last_phase=None)

Returns a recipe that conforms to the configuration passed as input.

Parameters:

• configuration (dict) – how to generate the current recipe

• last_phase (str) – last phase to be printed or None to print them all

spack.container.validate(configuration_file)

Validate a Spack environment YAML file that is being used to generate a recipe for a container.

Since a few attributes of the configuration must have specific values for the container recipe, this function returns a sanitized copy of the configuration in the input file. If any modification is needed, a warning will be issued.

Parameters:

configuration_file (str) – path to the Spack environment YAML file

Returns:

A sanitized copy of the configuration stored in the input file

Submodules

spack.container.images module

Manages the details on the images used in the various stages.

spack.container.images.all_bootstrap_os()

Return a list of all the OS that can be used to bootstrap Spack

spack.container.images.bootstrap_template_for(image)

spack.container.images.build_info(image, spack_version)

Returns the name of the build image and its tag.

Parameters:

• image (str) – image to be used at run-time. Should be of the form <image_name>:<image_tag> e.g. "ubuntu:18.04"

• spack_version (str) – version of Spack that we want to use to build

Returns:

A tuple with (image_name, image_tag) for the build image

spack.container.images.checkout_command(url, ref, enforce_sha, verify)

Return the checkout command to be used in the bootstrap phase.

Parameters:

• url (str) – url of the Spack repository

• ref (str) – either a branch name, a tag or a commit sha

• enforce_sha (bool) – if true turns every

• verify (bool)

spack.container.images.commands_for(package_manager)

Returns the commands used to update system repositories, install system packages and clean afterwards.

Parameters:

package_manager (str) – package manager to be used

Returns:

A tuple of (update, install, clean) commands.

spack.container.images.data()

Returns a dictionary with the static data on the images.

The dictionary is read from a JSON file lazily the first time this function is called.

spack.container.images.os_package_manager_for(image)

Returns the name of the OS package manager for the image passed as argument.

Parameters:

image (str) – image to be used at run-time. Should be of the form <image_name>:<image_tag> e.g. "ubuntu:18.04"

Returns:

Name of the package manager, e.g. "apt" or "yum"

spack.container.writers module

Writers for different kind of recipes and related convenience functions.

class spack.container.writers.DockerContext(config, last_phase)

Bases: PathContext

Context used to instantiate a Dockerfile

context_properties: List[str]

property manifest

The spack.yaml file that should be used in the image

template_name: str | None

Name of the template used for Dockerfiles

class spack.container.writers.PathContext(config, last_phase)

Bases: Context

Generic context used to instantiate templates of recipes that install software in a common location and make it available directly via PATH.

property bootstrap

Information related to the build image.

property build

Information related to the build image.

context_properties: List[str]

property depfile

property labels

property manifest

The spack.yaml file that should be used in the image

property os_package_update

Whether or not to update the OS package manager cache.

property os_packages_build

Additional system packages that are needed at build-time.

property os_packages_final

Additional system packages that are needed at run-time.

property paths

Important paths in the image

property render_phase

property run

Information related to the run image.

property strip

Whether or not to strip binaries in the image

template_name: str | None

class spack.container.writers.SingularityContext(config, last_phase)

Bases: PathContext

Context used to instantiate a Singularity definition file

context_properties: List[str]

property help

property runscript

property singularity_config

property startscript

template_name: str | None

Name of the template used for Singularity definition files

property test

spack.container.writers.create(configuration, last_phase=None)

Returns a writer that conforms to the configuration passed as input.

Parameters:

• configuration (dict) – how to generate the current recipe

• last_phase (str) – last phase to be printed or None to print them all

spack.container.writers.recipe(configuration, last_phase=None)

Returns a recipe that conforms to the configuration passed as input.

Parameters:

• configuration (dict) – how to generate the current recipe

• last_phase (str) – last phase to be printed or None to print them all

spack.container.writers.writer(name)

Decorator to register a factory for a recipe writer.

Each factory should take a configuration dictionary and return a properly configured writer that, when called, prints the corresponding recipe.