[feat] add "env" context

- reads environment variables and injects them into own context

src/contexts/env.rs

@@ -0,0 +1,20 @@
+use super::ContextProvider;
+use crate::contexts::Context;
+
+pub struct EnvContextProvider;
+
+impl ContextProvider for EnvContextProvider {
+ fn get_prefix(&self) -> String {
+ String::from("env")
+ }
+
+ fn get_contexts(&self) -> Vec<super::Context> {
+ let mut contexts = vec![];
+
+ for (key, value) in std::env::vars() {
+ contexts.push(Context::KeyValueContext(key, value));
+ }
+
+ contexts
+ }
+}

src/contexts/mod.rs

@@ -6,9 +6,12 @@ use user::UserContextProvider;
 
 use crate::{
  config::Config,
- contexts::{os::OSContextProvider, variables::VariablesContextProvider},
+ contexts::{
+ env::EnvContextProvider, os::OSContextProvider, variables::VariablesContextProvider,
+ },
 };
 
+pub mod env;
 pub mod os;
 /// User context provider: understands the user running the command
 pub mod user;
@@ -35,6 +38,7 @@ pub fn build_contexts(config: &Config) -> Contexts {
  let context_providers: Vec<Box<dyn ContextProvider>> = vec![
  Box::new(UserContextProvider {}),
  Box::new(OSContextProvider {}),
+ Box::new(EnvContextProvider {}),
  Box::new(VariablesContextProvider { config }),
  ];
 
@@ -135,4 +139,30 @@ mod test {
 
  Ok(())
  }
+
+ #[test]
+ fn env_context() -> anyhow::Result<()> {
+ let config = Config {
+ manifests: vec![],
+ variables: None,
+ };
+
+ std::env::set_var("ASCENDED_NAME", "Morgan Le Fay");
+ std::env::set_var("REAL_NAME", "Ganos Lal");
+
+ let contexts = build_contexts(&config);
+ let env_context_values = contexts.get("env");
+
+ assert_eq!(env_context_values.is_some(), true);
+ assert_eq!(
+ env_context_values.unwrap().get("ASCENDED_NAME").unwrap(),
+ "Morgan Le Fay"
+ );
+ assert_eq!(
+ env_context_values.unwrap().get("REAL_NAME").unwrap(),
+ "Ganos Lal"
+ );
+
+ Ok(())
+ }
 }