Use EnvironmentVariableName type for names of ENV variables

This makes the typing a bit more helpful by using a type for the name of
environment variables.

Signed-off-by: Matthias Beyer <mail@beyermatthias.de>

1 files changed, 21 insertions, 1 deletions

diff --git a/src/util/mod.rs b/src/util/mod.rs
index 5f6a35f..478962a 100644
--- a/src/util/mod.rs
+++ b/src/util/mod.rs
@@ -1,8 +1,28 @@
+use serde::Serialize;
 use serde::Deserialize;
 
-#[derive(Deserialize, Debug, Hash, Eq, PartialEq, Ord, PartialOrd)]
+#[derive(Serialize, Deserialize, Clone, Debug, Hash, Eq, PartialEq, Ord, PartialOrd)]
+#[serde(transparent)]
 pub struct EnvironmentVariableName(String);
 
+impl From<&str> for EnvironmentVariableName {
+    fn from(s: &str) -> EnvironmentVariableName {
+        EnvironmentVariableName(s.to_string())
+    }
+}
+
+impl AsRef<str> for EnvironmentVariableName {
+    fn as_ref(&self) -> &str {
+        self.0.as_ref()
+    }
+}
+
+impl std::fmt::Display for EnvironmentVariableName {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::result::Result<(), std::fmt::Error> {
+        self.0.fmt(f)
+    }
+}
+
 pub mod docker;
 pub mod filters;
 pub mod git;