add kernel-version field to metainfo

citadel-image/src/build.rs

@@ -148,6 +148,7 @@ impl UpdateBuilder {
         hdr.set_flag(ImageHeader::FLAG_DATA_COMPRESSED);
 
         let metainfo = self.generate_metainfo();
+        fs::write(self.config.workdir_path("metainfo"), &metainfo)?;
         hdr.set_metainfo_bytes(&metainfo);
         Ok(hdr)
     }
@@ -163,6 +164,9 @@ impl UpdateBuilder {
 
         let mut v = Vec::new();
         writeln!(v, "image-type = \"{}\"", self.config.image_type())?;
+        if let Some(kv) = self.config.kernel_version() {
+            writeln!(v, "kernel-version = \"{}\"", kv)?;
+        }
         writeln!(v, "channel = \"{}\"", self.config.channel())?;
         writeln!(v, "version = {}", self.config.version())?;
         writeln!(v, "nblocks = {}", self.nblocks.unwrap())?;

citadel-image/src/config.rs

@@ -86,6 +86,10 @@ impl BuildConfig {
         &self.img_name
     }
 
+    pub fn kernel_version(&self) -> Option<&str> {
+        self.kernel_version.as_ref().map(|s| s.as_str())
+    }
+
     pub fn version(&self) -> usize {
         self.version
     }

libcitadel/src/header.rs

@@ -291,6 +291,8 @@ struct MetaInfoToml {
     #[serde(rename = "image-type")]
     image_type: String,
     channel: String,
+    #[serde(rename = "kernel-version")]
+    kernel_version: Option<String>,
     version: u32,
     #[serde(rename = "base-version")]
     base_version: Option<u32>,
@@ -351,6 +353,8 @@ impl MetaInfo {
         self.toml().channel.as_str()
     }
 
+    pub fn kernel_version(&self) -> Option<&str> { self.toml().kernel_version.as_ref().map(|s| s.as_str()) }
+
     pub fn version(&self) -> u32 {
         self.toml().version
     }