Struct Store

pub struct Store { /* private fields */ }

A representation of a collection of known licenses.

This struct is generally what you want to start with if you’re looking to match text against a database of licenses. Load a cache from disk using from_cache, then use the analyze function to determine what a text most closely matches.

Examples

use scancode_rust::askalono::{Store, TextData};

let store = Store::from_cache(File::open("askalono-cache.bin.zstd")?)?;
let result = store.analyze(&TextData::from("what's this"));

Implementations

impl Store

pub fn analyze<'a>(&'a self, text: &TextData) -> Match<'a>

Compare the given TextData against all licenses in the Store.

This parallelizes the search as much as it can to find the best match. Once a match is obtained, it can be optimized further; see methods on TextData for more information.

impl Store

pub fn new() -> Store

Create a new Store.

More often, you probably want to use from_cache instead of creating an empty store.

pub fn len(&self) -> usize

Get the number of licenses in the store.

This only counts licenses by name – headers, aliases, and alternates aren’t included in the count.

pub fn is_empty(&self) -> bool

Check if the store is empty.

pub fn licenses(&self) -> impl Iterator<Item = &String>

Get all licenses by name via iterator.

pub fn get_original(&self, name: &str) -> Option<&TextData>

Get a license’s standard TextData by name.

pub fn add_license(&mut self, name: String, data: TextData)

Add a single license to the store.

If the license with the given name already existed, it and all of its variants will be replaced.

pub fn add_variant( &mut self, name: &str, variant: LicenseType, data: TextData, ) -> Result<(), Error>

Add a variant (a header or alternate formatting) of a given license to the store.

The license must already exist. This function cannot be used to replace the original/canonical text of the license.

pub fn aliases(&self, name: &str) -> Result<&Vec<String>, Error>

Get the list of aliases for a given license.

pub fn set_aliases( &mut self, name: &str, aliases: Vec<String>, ) -> Result<(), Error>

Set the list of aliases for a given license.

impl Store

pub fn from_cache<R>(readable: R) -> Result<Store, Error>

where R: Read + Sized,

Create a store from a cache file.

This method is highly useful for quickly loading a cache, as creating one from text data is rather slow. This method can typically load the full SPDX set from disk in 200-300 ms. The cache will be sanity-checked to ensure it was generated with a similar version of askalono.

pub fn to_cache<W>(&self, writable: W) -> Result<(), Error>

where W: Write + Sized,

Serialize the current store.

The output will be a MessagePack’d gzip’d or zstd’d binary stream that should be written to disk.

impl Store

pub fn load_spdx( &mut self, dir: &Path, include_texts: bool, ) -> Result<(), Error>

Fill the store with SPDX JSON data.

This function is very specific to the format of SPDX’s license-list-data repository. It reads all JSON files in the json/details directory and creates entries inside the store for matching.

This is intended to be used during build of askalono, so it’s not available unless the spdx feature is enabled.

include_texts, if true, will keep normalized license text data inside the store. This yields a larger store when serialized, but has the benefit of allowing you to diff your result against what askalono has stored.

Trait Implementations

impl Default for Store

fn default() -> Store

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Store

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for Store

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.