craft_parts.sources.base module

Base classes for source type handling.

class craft_parts.sources.base.BaseFileSourceModel(**data)

Bases: BaseSourceModel

A base model for file-based source types.

Parameters:

data (Any)

model_config: ClassVar[ConfigDict] = {'alias_generator': <function get_model_config.<locals>.<lambda>>, 'extra': 'forbid', 'frozen': True, 'json_schema_extra': None}

Configuration for the model, should be a dictionary conforming to [ConfigDict][pydantic.config.ConfigDict].

source: str

source_checksum: str | None

source_type: str

The name of this source type.

Sources must define this with a type hint of a Literal type of its name and a value of its name.

class craft_parts.sources.base.BaseSourceModel(**data)

Bases: BaseModel

A base model for source types.

Parameters:

data (Any)

model_config: ClassVar[ConfigDict] = {'alias_generator': <function get_model_config.<locals>.<lambda>>, 'extra': 'forbid', 'frozen': True, 'json_schema_extra': None}

Configuration for the model, should be a dictionary conforming to [ConfigDict][pydantic.config.ConfigDict].

pattern: ClassVar[str | None] = None

A regular expression for inferring this source type.

If pattern is None (the default), the source type cannot be inferred and must always be explicitly written in the source-type field of a part.

source: str

source_type: str

The name of this source type.

Sources must define this with a type hint of a Literal type of its name and a value of its name.

class craft_parts.sources.base.FileSourceHandler(source, part_src_dir, *, cache_dir, project_dirs, source_checksum=None, command=None, ignore_patterns=None, **kwargs)

Bases: SourceHandler

Base class for file source types.

Parameters:

• source (str)

• part_src_dir (Path)

• cache_dir (Path)

• project_dirs (ProjectDirs)

• source_checksum (str | None)

• command (str | None)

• ignore_patterns (list[str] | None)

• kwargs (Any)

download(filepath=None)

Download the URL from a remote location.

Parameters:

filepath (Path | None) – the destination file to download to.

Return type:

Path

abstract provision(dst, keep=False, src=None)

Process the source file to extract its payload.

Parameters:

• dst (Path)

• keep (bool)

• src (Path | None)

Return type:

None

pull()

Retrieve this source from its origin.

Return type:

None

class craft_parts.sources.base.SourceHandler(source, part_src_dir, *, cache_dir, project_dirs, ignore_patterns=None, **kwargs)

Bases: ABC

The base class for source type handlers.

Methods check_if_outdated() and update_source() can be overridden by subclasses to implement verification and update of source files.

Parameters:

• source (str)

• part_src_dir (Path)

• cache_dir (Path)

• project_dirs (ProjectDirs)

• ignore_patterns (list[str] | None)

• kwargs (Any)

check_if_outdated(target, *, ignore_files=None)

Check if pulled sources have changed since target was created.

Parameters:

• target (str) – Path to target file.

• ignore_files (list[str] | None) – Files excluded from verification.

Return type:

bool

Returns:

Whether the sources are outdated.

Raises:

errors.SourceUpdateUnsupported – If the source handler can’t check if files are outdated.

get_outdated_files()

Obtain lists of outdated files and directories.

Return type:

tuple[list[str], list[str]]

Returns:

The lists of outdated files and directories.

Raises:

errors.SourceUpdateUnsupported – If the source handler can’t check if files are outdated.

get_pull_snaps()

Return the set of snaps needed for handling this source type.

Return type:

set[str]

outdated_dirs: list[str] | None

outdated_files: list[str] | None

abstract pull()

Retrieve the source file.

Return type:

None

source_details: dict[str, str | None] | None

source_model: ClassVar[type[BaseSourceModel]]

update()

Update pulled source.

Raises:

errors.SourceUpdateUnsupported – If the source can’t update its files.

Return type:

None

craft_parts.sources.base.get_json_extra_schema(type_pattern)

Get extra values for this source type’s JSON schema.

This extra schema allows any source string if source-type is provided, but requires the given regex pattern if source-type is not declared. A user’s IDE will thus warn that they need “source-type” only if the source type cannot be inferred.

Parameters:

type_pattern (str) – A (string) regular expression to use in determining whether the source string is sufficient to infer source-type.

Return type:

dict[str, dict[str, Any]]

Returns:

A dictionary to pass into a source model’s config json_schema_extra

craft_parts.sources.base.get_model_config(json_schema_extra=None)

Get a config for a model with minor changes from the default.

Parameters:

json_schema_extra (dict[str, Any] | None)

Return type:

ConfigDict