cargo_feature_matrix/
config.rs

1use crate::features::{FeatureMatrix, FeatureSet};
2use figment::{
3  value::{Dict, Map},
4  Error, Figment, Metadata, Profile, Provider,
5};
6use serde::{Deserialize, Serialize};
7use std::collections::HashSet;
8
9#[derive(Default, Serialize, Deserialize)]
10#[non_exhaustive]
11#[serde(bound(deserialize = "'de: 'c"))]
12pub struct Config<'c> {
13  /// If this set is not empty, only these features will be used to construct the
14  /// matrix.
15  pub seed: FeatureSet<'c>,
16
17  /// All of these features will be included in every feature set in the matrix.
18  pub include: FeatureSet<'c>,
19
20  /// Any feature set that includes any of these will be excluded from the matrix.
21  /// This includes features enabled by other features.
22  ///
23  /// This can be used for things like having an "__unstable" feature that gets
24  /// enabled by any other features that use unstable rust features and then
25  /// excluding "__unstable" if not on nightly.
26  pub deny: FeatureSet<'c>,
27
28  /// These sets will be dropped from the matrix.
29  pub skip: FeatureMatrix<'c>,
30
31  /// Some crates prepend internal features with a double underscore. If this
32  /// flag is not set, those features will not be used to build the matrix, but
33  /// will be allowed if they are enabled by other features.
34  pub include_hidden: bool,
35
36  /// List sets of features that can't be used together. Any generated feature
37  /// set that is a superset of any of these sets will be dropped from the matrix.
38  pub conflict: HashSet<FeatureSet<'c>>,
39}
40
41impl Config<'_> {
42  pub fn from<T: Provider>(provider: T) -> Result<Self, Error> {
43    Figment::from(provider).extract()
44  }
45
46  pub fn figment() -> Figment {
47    Figment::from(Config::default())
48  }
49}
50
51impl Provider for Config<'_> {
52  fn metadata(&self) -> Metadata {
53    Metadata::named("Config object")
54  }
55
56  fn data(&self) -> Result<Map<Profile, Dict>, Error> {
57    figment::providers::Serialized::defaults(self).data()
58  }
59}
cargo_feature_matrix/config.rs

cargo_feature_matrix/
config.rs
