Upstream Hostname from secret-operator

Author: nightkr

crates/stackable-operator/src/commons/mod.rs

@@ -12,3 +12,4 @@ pub mod resources;
 pub mod s3;
 pub mod secret;
 pub mod secret_class;
+pub mod networking;

crates/stackable-operator/src/commons/networking.rs

@@ -0,0 +1,37 @@
+use std::{fmt::Display, ops::Deref};
+
+use schemars::JsonSchema;
+use serde::{Deserialize, Serialize};
+
+use crate::validation::{self, ValidationErrors};
+
+/// A validated hostname type, for use in CRDs.
+#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema)]
+#[serde(try_from = "String", into = "String")]
+pub struct Hostname(#[validate(regex(path = "validation::RFC_1123_SUBDOMAIN_REGEX"))] String);
+
+impl TryFrom<String> for Hostname {
+    type Error = ValidationErrors;
+
+    fn try_from(value: String) -> Result<Self, Self::Error> {
+        validation::is_rfc_1123_subdomain(&value)?;
+        Ok(Hostname(value))
+    }
+}
+impl From<Hostname> for String {
+    fn from(value: Hostname) -> Self {
+        value.0
+    }
+}
+impl Display for Hostname {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.write_str(&self.0)
+    }
+}
+impl Deref for Hostname {
+    type Target = str;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}

crates/stackable-operator/src/validation.rs

@@ -33,7 +33,7 @@ const RFC_1035_LABEL_ERROR_MSG: &str = "a DNS-1035 label must consist of lower c
 const RFC_1035_LABEL_MAX_LENGTH: usize = 63;
 
 // Lazily initialized regular expressions
-static RFC_1123_SUBDOMAIN_REGEX: LazyLock<Regex> = LazyLock::new(|| {
+pub(crate) static RFC_1123_SUBDOMAIN_REGEX: LazyLock<Regex> = LazyLock::new(|| {
     Regex::new(&format!("^{RFC_1123_SUBDOMAIN_FMT}$"))
         .expect("failed to compile RFC 1123 subdomain regex")
 });