diff options
author | Matthias Beyer <mail@beyermatthias.de> | 2023-01-02 10:40:08 +0100 |
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committer | Matthias Beyer <mail@beyermatthias.de> | 2023-01-02 10:40:08 +0100 |
commit | 2bb2a632a1b131c37f92ccfb7b44bd0e05c44fe0 (patch) | |
tree | 23bf23dbc00c6c1b759e510f4747e6df4fc8cbf4 /src | |
parent | 040958c6272595a8cb4f59ccdbcbd35bc0de9c58 (diff) |
Copy member docs to builder functions
The members are not visible on docs.rs, so copy their documentation to
the respective builder functions so users can see what they're about.
Signed-off-by: Matthias Beyer <mail@beyermatthias.de>
Diffstat (limited to 'src')
-rw-r--r-- | src/env.rs | 48 |
1 files changed, 48 insertions, 0 deletions
@@ -96,6 +96,13 @@ impl Environment { Self::default() } + /// Optional prefix that will limit access to the environment to only keys that + /// begin with the defined prefix. + /// + /// A prefix with a separator of `_` is tested to be present on each key before its considered + /// to be part of the source environment. + /// + /// For example, the key `CONFIG_DEBUG` would become `DEBUG` with a prefix of `config`. pub fn with_prefix(s: &str) -> Self { Self { prefix: Some(s.into()), @@ -103,6 +110,7 @@ impl Environment { } } + /// See [Environment::with_prefix] pub fn prefix(mut self, s: &str) -> Self { self.prefix = Some(s.into()); self @@ -119,11 +127,15 @@ impl Environment { self } + /// Optional character sequence that separates the prefix from the rest of the key pub fn prefix_separator(mut self, s: &str) -> Self { self.prefix_separator = Some(s.into()); self } + /// Optional character sequence that separates each key segment in an environment key pattern. + /// Consider a nested configuration such as `redis.password`, a separator of `_` would allow + /// an environment key of `REDIS_PASSWORD` to match. pub fn separator(mut self, s: &str) -> Self { self.separator = Some(s.into()); self @@ -151,6 +163,7 @@ impl Environment { self } + /// Ignore empty env values (treat as unset). pub fn ignore_empty(mut self, ignore: bool) -> Self { self.ignore_empty = ignore; self @@ -163,11 +176,46 @@ impl Environment { self } + // Preserve the prefix while parsing pub fn keep_prefix(mut self, keep: bool) -> Self { self.keep_prefix = keep; self } + /// Alternate source for the environment. This can be used when you want to test your own code + /// using this source, without the need to change the actual system environment variables. + /// + /// ## Example + /// + /// ```rust + /// # use config::{Environment, Config}; + /// # use serde::Deserialize; + /// # use std::collections::HashMap; + /// # use std::convert::TryInto; + /// # + /// #[test] + /// fn test_config() -> Result<(), config::ConfigError> { + /// #[derive(Clone, Debug, Deserialize)] + /// struct MyConfig { + /// pub my_string: String, + /// } + /// + /// let source = Environment::default() + /// .source(Some({ + /// let mut env = HashMap::new(); + /// env.insert("MY_STRING".into(), "my-value".into()); + /// env + /// })); + /// + /// let config: MyConfig = Config::builder() + /// .add_source(source) + /// .build()? + /// .try_into()?; + /// assert_eq!(config.my_string, "my-value"); + /// + /// Ok(()) + /// } + /// ``` pub fn source(mut self, source: Option<Map<String, String>>) -> Self { self.source = source; self |