Use discoverable partition specification for rootfs UUID

Signed-off-by: Pragyan Poudyal <pragyanpoudyal41999@gmail.com>

Author: Johan-Liebert1

lib/src/install/baseline.rs

@@ -104,10 +104,15 @@ fn mkfs<'a>(
     label: &str,
     wipe: bool,
     opts: impl IntoIterator<Item = &'a str>,
+    dps_uuid: Option<uuid::Uuid>,
 ) -> Result<uuid::Uuid> {
     let devinfo = bootc_blockdev::list_dev(dev.into())?;
     let size = ostree_ext::glib::format_size(devinfo.size);
-    let u = uuid::Uuid::new_v4();
+    let u = if let Some(u) = dps_uuid {
+        u
+    } else {
+        uuid::Uuid::new_v4()
+    };
     let mut t = Task::new(
         &format!("Creating {label} filesystem ({fs}) on device {dev} (size={size})"),
         format!("mkfs.{fs}"),
@@ -383,6 +388,7 @@ pub(crate) fn install_create_rootfs(
                 "boot",
                 opts.wipe,
                 [],
+                None,
             )
             .context("Initializing /boot")?,
         )
@@ -403,6 +409,8 @@ pub(crate) fn install_create_rootfs(
         "root",
         opts.wipe,
         mkfs_options.iter().copied(),
+        // TODO: Add cli option for this
+        Some(uuid::uuid!("6523f8ae-3eb1-4e2a-a05a-18b695ae656f")),
     )?;
     let rootarg = format!("root=UUID={root_uuid}");
     let bootsrc = boot_uuid.as_ref().map(|uuid| format!("UUID={uuid}"));