vs_common package

Submodules

vs_common.archive module

archive.py

This module contains functions for handling archives.

class vs_common.archive.Archive(path: str | AbstractBufferedFile)[source]

Bases: ABC

abstract extract_file(f: TarInfo | ZipInfo) → ExFileObject | ZipExtFile[source]

Extract a file in memory

Parameters:: f (InfoFile) – Valid info file
Returns:: Extracted file
Return type:: ExFile

abstract get_members() → List[TarInfo | ZipInfo][source]

Return a list of archive info files

Returns:: List of InfoFiles
Return type:: List[InfoFile]

vsi_prefix: str = ''

exception vs_common.archive.ArchiveError[source]: Bases: Exception

class vs_common.archive.GzArchive(path: str | AbstractBufferedFile)[source]

Bases: Archive

Handles .gz archives

class vs_common.archive.TarArchive(path: str | AbstractBufferedFile)[source]

Bases: Archive

Handles .tar and .tar.gz archives

extract_file(f)[source]

Extract a file in memory

Parameters:: f (InfoFile) – Valid info file
Returns:: Extracted file
Return type:: ExFile

get_members()[source]

Return a list of archive info files

Returns:: List of InfoFiles
Return type:: List[InfoFile]

vsi_prefix: str = '/vsitar/'

class vs_common.archive.ZipArchive(path: str | AbstractBufferedFile)[source]

Bases: Archive

Handles .zip archives

extract_file(f)[source]

Extract a file in memory

Parameters:: f (InfoFile) – Valid info file
Returns:: Extracted file
Return type:: ExFile

get_members()[source]

Return a list of archive info files

Returns:: List of InfoFiles
Return type:: List[InfoFile]

vsi_prefix: str = '/vsizip/'

vs_common.archive.archive_extract(path: str, regex: str, to_path: str) → str[source]

Extracts the first file matching regex from archive

Parameters:

path (str) – Path to archive
regex (str) – Regex to extract
to_path (str) – Destination of extract

Returns:

Path to extracted file

Return type:

str

vs_common.archive.archive_search(path: str, regex: str) → List[str][source]

Searches the archive recursively for a file matching a regex

Parameters:

path (str) – Path to archive
regex (str) – Regular expression for searching

Raises:

ArchiveError – Raised when no matches are found

Returns:

All matched files in archive, formatted as vsi paths

Return type:

List[str]

vs_common.config module

vs_common.config.load_config(cfg_path: str, configuration_class: Type[ServiceConfig], overrides: Tuple[str] | None = None) → ServiceConfig[source]

Load the configuration as structured config

Parameters:

cfg_path (str) – File path to configuration
configuration_class (Type[ServiceConfig]) – Main, top level model of configuration, a dataclass reference
overrides –
Optional[Tuple[str]]: Tuple of dotlist overrides. Example: (“config.value=42”, “foo.bar=baz”) overrides a yaml config and creates the following yaml
```
config:
    value: 42
foo:
    bar: baz
```

Returns:

Structured configuration

Return type:

ServiceConfig

vs_common.config.validate_config(cfg_path: str, schema_path: str) → None[source]

Validate config file against schema

Parameters:

cfg_path (str) – path to the yaml configuration file
schema_path (str) – path to the schema file, usually sitting at top of source directory

vs_common.filesystem module

filesystem.py

This module contains functions for handling filesystems via model.

vs_common.filesystem.authentication_environment(filesystem_config: FilesystemConfig) → Iterator[source]

Set appropriate authentication environment variables from the given config

Parameters:: auth_config (FilesystemConfig) – Storage authentication configuration

vs_common.filesystem.get_filesystem(filesystem_config: FilesystemConfig) → AbstractFileSystem[source]

Initialize appropriate filesystem from given config

Parameters:: filesystem_config (FilesystemConfig) – Filesystem configuration
Returns:: fsspec filesystem
Return type:: fsspec.AbstractFileSystem

vs_common.filesystem.upload(from_path: str, to_path: str) → str[source]

Uploads file to given path

Parameters:

from_path (str) – File path to upload
to_path (str) – Destination path

Returns:

Final path of file

Return type:

str

vs_common.model module

model.py

This module contains the view server shared configuration models

class vs_common.model.CatalogConfig(id: str = 'vs-stac-catalog', description: str = 'View Server STAC catalog', title: str = 'VS Catalog')[source]

Bases: object

description: str = 'View Server STAC catalog'

id: str = 'vs-stac-catalog'

title: str = 'VS Catalog'

class vs_common.model.FilesystemConfig(type: vs_common.model.FilesystemType, s3: vs_common.model.S3FilesystemConfig | None = None, swift: vs_common.model.SwiftFileystemConfig | None = None, local: vs_common.model.LocalFilesystemConfig | None = None, sshfs: vs_common.model.SSHFilesystemConfig | None = None)[source]

Bases: object

local: LocalFilesystemConfig | None = None

s3: S3FilesystemConfig | None = None

sshfs: SSHFilesystemConfig | None = None

swift: SwiftFileystemConfig | None = None

type: FilesystemType

class vs_common.model.FilesystemType(value)[source]

Bases: str, Enum

An enumeration.

file = 'file'

s3 = 's3'

sshfs = 'sshfs'

swift = 'swift'

class vs_common.model.LocalFilesystemConfig[source]: Bases: object

class vs_common.model.S3FilesystemConfig(access_key_id: str = '', secret_access_key: str = '', endpoint_url: str = '', region: str = '', public: bool = False)[source]

Bases: object

access_key_id: str = ''

endpoint_url: str = ''

public: bool = False

region: str = ''

secret_access_key: str = ''

class vs_common.model.SSHFilesystemConfig(host: str, username: str, password: str)[source]

Bases: object

host: str

password: str

username: str

class vs_common.model.SwiftFileystemConfig(user: str, key: str, region_name: str, authurl: str, auth_version: str, tenant_name: str)[source]

Bases: object

auth_version: str

authurl: str

key: str

region_name: str

tenant_name: str

user: str

vs_common.stac module

stac.py

This module contains functions for STAC concepts.

class vs_common.stac.FSSpecStacIO(headers: Dict[str, str] | None = None)[source]

Bases: StacIO

Extension of StacIO to allow working with different filesystems using fsspec.

read_text(source: str | PathLike, *args: Any, **kwargs: Any) → str[source]

Read text from the given URI.

The source to read from can be specified as a string or os.PathLike object (Link is a path-like object). If it is a string, it must be a URI or local path from which to read. Using a Link enables implementations to use additional link information, such as paging information contained in the extended links described in the STAC API spec.

Parameters:

source – The source to read from.
*args – Arbitrary positional arguments that may be utilized by the concrete implementation.
**kwargs – Arbitrary keyword arguments that may be utilized by the concrete implementation.

Returns:

The text contained in the file at the location specified by the uri.

Return type:

str

write_text(dest: str | PathLike, txt: str, *args: Any, **kwargs: Any) → None[source]

Write the given text to a file at the given URI.

The destination to write to can be specified as a string or os.PathLike object (Link is a path-like object). If it is a string, it must be a URI or local path from which to read. Using a Link enables implementations to use additional link information.

Parameters:

dest – The destination to write to.
txt – The text to write.

vs_common.stac.create_item(old_item: Item, metadata: Dict, assets: Dict[str, Asset], overwrite_metadata: bool = True) → Item[source]

Create a new item from an existing item

Parameters:

old_item (Item) – Existing old item
metadata (Dict) – Metadata to add to properties
assets (Dict[str, Asset]) – Assets to plug in
overwrite_metadata – (bool): Attempt to overwrite metadata. If set to False,
True. (sets these as None. Defaults to)

Returns:

A new item ready for upload

Return type:

Item

vs_common.stac.encode_item(output: Item) → str[source]

Encodes item as json

Parameters:: output (Item) – Item to encode
Returns:: JSON encoded item
Return type:: str

vs_common.stac.get_item(json_item_or_path: str) → Item | None[source]

Get item from json string or from file

Parameters:: item (str) – JSON encoded stac item or path to a file
Returns:: pystac.Item resolved item
Return type:: Item

vs_common.stac.get_or_create_catalog(catalog_path: str, catalog_config: CatalogConfig = CatalogConfig(id='vs-stac-catalog', description='View Server STAC catalog', title='VS Catalog')) → Catalog[source]

Retrieves or creates a new stac catalog from given filesystem config parameters

Parameters:

catalog_path (str) – Path to STAC catalog. By default sits at the root of each filesystem with file named catalog.json. Example: s3://bucket/catalog.json
filesystem_config (FilesystemConfig) – Filesystem configuration
catalog_config (CatalogConfig, optional) – Configuration of the catalog. Defaults to CatalogConfig().

Returns:

STAC Catalog object

Return type:

Catalog

vs_common.stac.get_or_create_collection(collection_id: str, catalog: Catalog) → Collection[source]

Retrieves from catalog or creates a new STAC collection

Parameters:

collection_id (str) – Id of the collection
catalog (Catalog) – Catalog to crawl

Returns:

STAC Collection

Return type:

Collection

vs_common package

Submodules

vs_common.archive module

archive.py

vs_common.config module

vs_common.filesystem module

filesystem.py

vs_common.model module

model.py

vs_common.stac module

stac.py

Module contents