install: Add more image metadata to aleph

Motivated by https://issues.redhat.com/browse/COS-2526

It's quite possible that the image sha will have been GCd, but
the version number and timestamp inside the image (not just
the file timestamp) are probably sufficient for general reference.

lib/src/install.rs

@@ -21,7 +21,9 @@ use camino::Utf8PathBuf;
 use cap_std::fs::Dir;
 use cap_std_ext::cap_std;
 use cap_std_ext::prelude::CapStdExtDirExt;
+use chrono::prelude::*;
 use clap::ValueEnum;
+use ostree_ext::oci_spec;
 use rustix::fs::MetadataExt;
 
 use fn_error_context::context;
@@ -228,6 +230,11 @@ const BOOTC_ALEPH_PATH: &str = ".bootc-aleph.json";
 struct InstallAleph {
     /// Digested pull spec for installed image
     image: String,
+    /// The version number
+    version: Option<String>,
+    /// The timestamp
+    timestamp: Option<chrono::DateTime<Utc>>,
+    /// The `uname -r` of the kernel doing the installation
     kernel: String,
 }
 
@@ -533,7 +540,7 @@ async fn initialize_ostree_root_from_self(
     let state =
         ostree_container::deploy::deploy(&sysroot, stateroot, &src_imageref, Some(options)).await?;
     let target_image = target_imgref.to_string();
-    let digest = state.manifest_digest;
+    let digest = state.manifest_digest.as_str();
     println!("Installed: {target_image}");
     println!("   Digest: {digest}");
 
@@ -565,8 +572,18 @@ async fn initialize_ostree_root_from_self(
 
     let uname = rustix::system::uname();
 
+    let config = state.configuration.as_ref();
+    let labels = config.and_then(crate::status::labels_of_config);
+    let timestamp = labels
+        .and_then(|l| {
+            l.get(oci_spec::image::ANNOTATION_CREATED)
+                .map(|s| s.as_str())
+        })
+        .and_then(crate::status::try_deserialize_timestamp);
     let aleph = InstallAleph {
         image: src_imageref.imgref.name.clone(),
+        version: state.version().as_ref().map(|s| s.to_string()),
+        timestamp,
         kernel: uname.release().to_str()?.to_string(),
     };
 

lib/src/status.rs

@@ -88,7 +88,7 @@ pub(crate) struct Deployments {
     pub(crate) other: VecDeque<ostree::Deployment>,
 }
 
-fn try_deserialize_timestamp(t: &str) -> Option<chrono::DateTime<chrono::Utc>> {
+pub(crate) fn try_deserialize_timestamp(t: &str) -> Option<chrono::DateTime<chrono::Utc>> {
     match chrono::DateTime::parse_from_rfc3339(t).context("Parsing timestamp") {
         Ok(t) => Some(t.into()),
         Err(e) => {