Struct ConfigBuilder

pub struct ConfigBuilder { /* private fields */ }

Used to instantiate Config instances.

Implementations

impl ConfigBuilder

pub fn with_user_config_file(self) -> Self

Add the $XDG_CONFIG/rcodesign/rcodesign.toml user config file if it exists.

pub fn with_cwd_config_file(self) -> Self

Merge a config file from pwd/rcodesign.toml.

pub fn with_env_prefix(self) -> Self

Merge with environment variables.

Must be called after [profile()] to ensure environment variables are mapped to the current profile.

pub fn toml_file(self, path: impl AsRef<Path>) -> Self

Add a TOML config file to this instance.

pub fn toml_string(self, data: &str) -> Self

Add a TOML string config to this instance.

pub fn with_config_struct(self, config: Config) -> Self

Merge a Config struct into this builder

pub fn profile(self, profile: String) -> Self

Load the named profile instead of the [default] profile.

pub fn config(self) -> Result<Config, AppleCodesignError>

Obtain a config profile.

Methods from Deref<Target = Figment>

pub fn focus(&self, key: &str) -> Figment

Returns a new Figment containing only the sub-dictionaries at key.

This “sub-figment” is a focusing of self with the property that:

• self.find(key + ".sub") <=> focused.find("sub")

In other words, all values in self with a key starting with key are in focused without the prefix and vice-versa.

Example

use figment::{Figment, providers::{Format, Toml}};

figment::Jail::expect_with(|jail| {
    jail.create_file("Config.toml", r#"
        cat = [1, 2, 3]
        dog = [4, 5, 6]

        [subtree]
        cat = "meow"
        dog = "woof!"

        [subtree.bark]
        dog = true
        cat = false
    "#)?;

    let root = Figment::from(Toml::file("Config.toml"));
    assert_eq!(root.extract_inner::<Vec<u8>>("cat").unwrap(), vec![1, 2, 3]);
    assert_eq!(root.extract_inner::<Vec<u8>>("dog").unwrap(), vec![4, 5, 6]);
    assert_eq!(root.extract_inner::<String>("subtree.cat").unwrap(), "meow");
    assert_eq!(root.extract_inner::<String>("subtree.dog").unwrap(), "woof!");

    let subtree = root.focus("subtree");
    assert_eq!(subtree.extract_inner::<String>("cat").unwrap(), "meow");
    assert_eq!(subtree.extract_inner::<String>("dog").unwrap(), "woof!");
    assert_eq!(subtree.extract_inner::<bool>("bark.cat").unwrap(), false);
    assert_eq!(subtree.extract_inner::<bool>("bark.dog").unwrap(), true);

    let bark = subtree.focus("bark");
    assert_eq!(bark.extract_inner::<bool>("cat").unwrap(), false);
    assert_eq!(bark.extract_inner::<bool>("dog").unwrap(), true);

    let not_a_dict = root.focus("cat");
    assert!(not_a_dict.extract_inner::<bool>("cat").is_err());
    assert!(not_a_dict.extract_inner::<bool>("dog").is_err());

    Ok(())
});

pub fn extract<'a, T>(&self) -> Result<T, Error>

where T: Deserialize<'a>,

Deserializes the collected value into T.

Example

use serde::Deserialize;

use figment::{Figment, providers::{Format, Toml, Json, Env}};

#[derive(Debug, PartialEq, Deserialize)]
struct Config {
    name: String,
    numbers: Option<Vec<usize>>,
    debug: bool,
}

figment::Jail::expect_with(|jail| {
    jail.create_file("Config.toml", r#"
        name = "test"
        numbers = [1, 2, 3, 10]
    "#)?;

    jail.set_env("config_name", "env-test");

    jail.create_file("Config.json", r#"
        {
            "name": "json-test",
            "debug": true
        }
    "#)?;

    let config: Config = Figment::new()
        .merge(Toml::file("Config.toml"))
        .merge(Env::prefixed("CONFIG_"))
        .join(Json::file("Config.json"))
        .extract()?;

    assert_eq!(config, Config {
        name: "env-test".into(),
        numbers: vec![1, 2, 3, 10].into(),
        debug: true
    });

    Ok(())
});

pub fn extract_lossy<'a, T>(&self) -> Result<T, Error>

where T: Deserialize<'a>,

As extract, but interpret numbers and booleans more flexibly.

See Value::to_bool_lossy and Value::to_num_lossy for a full explanation of the imputs accepted.

Example

use serde::Deserialize;

use figment::{Figment, providers::{Format, Toml, Json, Env}};

#[derive(Debug, PartialEq, Deserialize)]
struct Config {
    name: String,
    numbers: Option<Vec<usize>>,
    debug: bool,
}

figment::Jail::expect_with(|jail| {
    jail.create_file("Config.toml", r#"
        name = "test"
        numbers = ["1", "2", "3", "10"]
    "#)?;

    jail.set_env("config_name", "env-test");

    jail.create_file("Config.json", r#"
        {
            "name": "json-test",
            "debug": "yes"
        }
    "#)?;

    let config: Config = Figment::new()
        .merge(Toml::file("Config.toml"))
        .merge(Env::prefixed("CONFIG_"))
        .join(Json::file("Config.json"))
        .extract_lossy()?;

    assert_eq!(config, Config {
        name: "env-test".into(),
        numbers: vec![1, 2, 3, 10].into(),
        debug: true
    });

    Ok(())
});

pub fn extract_inner<'a, T>(&self, path: &str) -> Result<T, Error>

where T: Deserialize<'a>,

Deserializes the value at the key path in the collected value into T.

Example

use figment::{Figment, providers::{Format, Toml, Json}};

figment::Jail::expect_with(|jail| {
    jail.create_file("Config.toml", r#"
        numbers = [1, 2, 3, 10]
    "#)?;

    jail.create_file("Config.json", r#"{ "debug": true } "#)?;

    let numbers: Vec<usize> = Figment::new()
        .merge(Toml::file("Config.toml"))
        .join(Json::file("Config.json"))
        .extract_inner("numbers")?;

    assert_eq!(numbers, vec![1, 2, 3, 10]);

    Ok(())
});

pub fn extract_inner_lossy<'a, T>(&self, path: &str) -> Result<T, Error>

where T: Deserialize<'a>,

As extract, but interpret numbers and booleans more flexibly.

See Value::to_bool_lossy and Value::to_num_lossy for a full explanation of the imputs accepted.

Example

use figment::{Figment, providers::{Format, Toml, Json}};

figment::Jail::expect_with(|jail| {
    jail.create_file("Config.toml", r#"
        numbers = ["1", "2", "3", "10"]
    "#)?;

    jail.create_file("Config.json", r#"{ "debug": true } "#)?;

    let numbers: Vec<usize> = Figment::new()
        .merge(Toml::file("Config.toml"))
        .join(Json::file("Config.json"))
        .extract_inner_lossy("numbers")?;

    assert_eq!(numbers, vec![1, 2, 3, 10]);

    Ok(())
});

pub fn metadata(&self) -> impl Iterator<Item = &Metadata>

Returns an iterator over the metadata for all of the collected values in the order in which they were added to self.

Example

use figment::{Figment, providers::{Format, Toml, Json}};

let figment = Figment::new()
    .merge(Toml::file("Config.toml"))
    .join(Json::file("Config.json"));

assert_eq!(figment.metadata().count(), 2);
for (i, md) in figment.metadata().enumerate() {
    match i {
        0 => assert!(md.name.starts_with("TOML")),
        1 => assert!(md.name.starts_with("JSON")),
        _ => unreachable!(),
    }
}

pub fn profile(&self) -> &Profile

Returns the selected profile.

Example

use figment::Figment;

let figment = Figment::new();
assert_eq!(figment.profile(), "default");

let figment = figment.select("staging");
assert_eq!(figment.profile(), "staging");

pub fn profiles(&self) -> impl Iterator<Item = &Profile>

Returns an iterator over profiles with valid configurations in this figment. Note: this may not include the selected profile if the selected profile has no configured values.

Example

use figment::{Figment, providers::Serialized};

let figment = Figment::new();
let profiles = figment.profiles().collect::<Vec<_>>();
assert_eq!(profiles.len(), 0);

let figment = Figment::new()
    .join(Serialized::default("key", "hi"))
    .join(Serialized::default("key", "hey").profile("debug"));

let mut profiles = figment.profiles().collect::<Vec<_>>();
profiles.sort();
assert_eq!(profiles, &["debug", "default"]);

let figment = Figment::new()
    .join(Serialized::default("key", "hi").profile("release"))
    .join(Serialized::default("key", "hi").profile("testing"))
    .join(Serialized::default("key", "hey").profile("staging"))
    .select("debug");

let mut profiles = figment.profiles().collect::<Vec<_>>();
profiles.sort();
assert_eq!(profiles, &["release", "staging", "testing"]);

pub fn find_value(&self, path: &str) -> Result<Value, Error>

Finds the value at path in the combined value.

If there is an error evaluating the combined figment, that error is returned. Otherwise if there is a value at path, returns Ok(value), and if there is no value at path, returns Err of kind MissingField.

See Value::find() for details on the syntax for path.

Example

use serde::Deserialize;

use figment::{Figment, providers::{Format, Toml, Json, Env}};

figment::Jail::expect_with(|jail| {
    jail.create_file("Config.toml", r#"
        name = "test"

        [package]
        name = "my-package"
    "#)?;

    jail.create_file("Config.json", r#"
        {
            "author": { "name": "Bob" }
        }
    "#)?;

    let figment = Figment::new()
        .merge(Toml::file("Config.toml"))
        .join(Json::file("Config.json"));

    let name = figment.find_value("name")?;
    assert_eq!(name.as_str(), Some("test"));

    let package_name = figment.find_value("package.name")?;
    assert_eq!(package_name.as_str(), Some("my-package"));

    let author_name = figment.find_value("author.name")?;
    assert_eq!(author_name.as_str(), Some("Bob"));

    Ok(())
});

pub fn contains(&self, path: &str) -> bool

Returns true if the combined figment evaluates successfully and contains a value at path.

See Value::find() for details on the syntax for path.

Example

use serde::Deserialize;

use figment::{Figment, providers::{Format, Toml, Json, Env}};

figment::Jail::expect_with(|jail| {
    jail.create_file("Config.toml", r#"
        name = "test"

        [package]
        name = "my-package"
    "#)?;

    jail.create_file("Config.json", r#"
        {
            "author": { "name": "Bob" }
        }
    "#)?;

    let figment = Figment::new()
        .merge(Toml::file("Config.toml"))
        .join(Json::file("Config.json"));

    assert!(figment.contains("name"));
    assert!(figment.contains("package"));
    assert!(figment.contains("package.name"));
    assert!(figment.contains("author"));
    assert!(figment.contains("author.name"));
    assert!(!figment.contains("author.title"));
    Ok(())
});

pub fn find_metadata(&self, key: &str) -> Option<&Metadata>

Finds the metadata for the value at key path. See Value::find() for details on the syntax for key.

Example

use serde::Deserialize;

use figment::{Figment, providers::{Format, Toml, Json, Env}};

figment::Jail::expect_with(|jail| {
    jail.create_file("Config.toml", r#" name = "test" "#)?;
    jail.set_env("CONF_AUTHOR", "Bob");

    let figment = Figment::new()
        .merge(Toml::file("Config.toml"))
        .join(Env::prefixed("CONF_").only(&["author"]));

    let name_md = figment.find_metadata("name").unwrap();
    assert!(name_md.name.starts_with("TOML"));

    let author_md = figment.find_metadata("author").unwrap();
    assert!(author_md.name.contains("CONF_"));
    assert!(author_md.name.contains("environment"));

    Ok(())
});

pub fn get_metadata(&self, tag: Tag) -> Option<&Metadata>

Returns the metadata with the given tag if this figment contains a value with said metadata.

Example

use serde::Deserialize;

use figment::{Figment, providers::{Format, Toml, Json, Env}};

figment::Jail::expect_with(|jail| {
    jail.create_file("Config.toml", r#" name = "test" "#)?;
    jail.create_file("Config.json", r#" { "author": "Bob" } "#)?;

    let figment = Figment::new()
        .merge(Toml::file("Config.toml"))
        .join(Json::file("Config.json"));

    let name = figment.find_value("name").unwrap();
    let metadata = figment.get_metadata(name.tag()).unwrap();
    assert!(metadata.name.starts_with("TOML"));

    let author = figment.find_value("author").unwrap();
    let metadata = figment.get_metadata(author.tag()).unwrap();
    assert!(metadata.name.starts_with("JSON"));

    Ok(())
});

Trait Implementations

impl Clone for ConfigBuilder

fn clone(&self) -> ConfigBuilder

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Default for ConfigBuilder

fn default() -> Self

Returns the “default value” for a type.

impl Deref for ConfigBuilder

type Target = Figment

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl DerefMut for ConfigBuilder

fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.