bootstrap: add UdevFilter

src/bin/dls.rs

@@ -12,7 +12,7 @@ use dkl::dls;
 #[derive(Parser)]
 #[command()]
 struct Cli {
-    #[arg(long, default_value = "http://[::1]:7606")]
+    #[arg(long, default_value = "http://[::1]:7606", env = "DLS_URL")]
     dls: String,
 
     #[command(subcommand)]

src/bootstrap.rs

@@ -57,7 +57,10 @@ pub struct Network {
 pub struct NetworkInterface {
     pub var: String,
     pub n: i16,
+    #[serde(default, skip_serializing_if = "Vec::is_empty")]
     pub regexps: Vec<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub udev: Option<UdevFilter>,
 }
 
 #[derive(Clone, Debug, serde::Deserialize, serde::Serialize)]
@@ -142,41 +145,77 @@ pub enum LvSize {
 #[derive(Debug, serde::Deserialize, serde::Serialize)]
 pub struct LvmPV {
     pub n: i16,
+    #[serde(default, skip_serializing_if = "Vec::is_empty")]
     pub regexps: Vec<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub udev: Option<UdevFilter>,
 }
 
 #[derive(Debug, serde::Deserialize, serde::Serialize)]
 pub struct CryptDev {
     pub name: String,
-    #[serde(flatten)]
-    pub filter: DevFilter,
+    // hit the limit of enum representation here (flatten + enum variant case)
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub dev: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub prefix: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub udev: Option<UdevFilter>,
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub optional: Option<bool>,
 }
 impl CryptDev {
-    pub fn optional(&self) -> bool {
-        self.optional.unwrap_or_else(|| self.filter.is_prefix())
+    pub fn filter(&self) -> DevFilter<'_> {
+        if let Some(dev) = self.dev.as_deref() {
+            DevFilter::Dev(dev)
+        } else if let Some(prefix) = self.prefix.as_deref() {
+            DevFilter::Prefix(prefix)
+        } else if let Some(udev) = self.udev.as_ref() {
+            DevFilter::Udev(udev)
+        } else {
+            DevFilter::None
         }
     }
 
-#[derive(Debug, serde::Deserialize, serde::Serialize)]
+    pub fn optional(&self) -> bool {
+        self.optional.unwrap_or_else(|| match self.filter() {
+            DevFilter::None => true,
+            DevFilter::Dev(_) => false,
+            DevFilter::Prefix(_) => true,
+            DevFilter::Udev(_) => true,
+        })
+    }
+}
+
+#[test]
+fn test_parse_crypt_dev() {
+    for s in [
+        "name: sys0\ndev: /dev/sda\n",
+        "name: crypt-\nprefix: /dev/sd\n",
+        "name: crypt-${name}\nudev: !glob [ DEVNAME, /dev/sd* ]\n",
+    ] {
+        let dev: CryptDev = serde_yaml::from_str(s).unwrap();
+        dev.filter();
+        dev.optional();
+    }
+}
+
+pub enum DevFilter<'t> {
+    None,
+    Dev(&'t str),
+    Prefix(&'t str),
+    Udev(&'t UdevFilter),
+}
+
+#[derive(Debug, serde::Deserialize, serde::Serialize, Clone)]
 #[serde(rename_all = "snake_case")]
-pub enum DevFilter {
-    Dev(String),
-    Prefix(String),
-}
-impl DevFilter {
-    pub fn is_dev(&self) -> bool {
-        match self {
-            Self::Dev(_) => true,
-            _ => false,
-        }
-    }
-    pub fn is_prefix(&self) -> bool {
-        match self {
-            Self::Prefix(_) => true,
-            _ => false,
-        }
-    }
+pub enum UdevFilter {
+    Has(String),
+    Eq(String, String),
+    Glob(String, String),
+    And(Vec<UdevFilter>),
+    Or(Vec<UdevFilter>),
+    Not(Box<UdevFilter>),
 }
 
 #[derive(Debug, Default, Clone, serde::Deserialize, serde::Serialize)]