Backport the PR that will use an already mounted ESP for installation

Fix the building error without device.
See 593b94a175

0001-install-attempt-to-use-an-already-mounted-ESP-at-the.patch

@@ -0,0 +1,51 @@
+From 593b94a1750c1d71f5a37365633afdd99cfb714b Mon Sep 17 00:00:00 2001
+From: Huijing Hei <hhei@redhat.com>
+Date: Wed, 25 Jun 2025 12:14:02 +0800
+Subject: [PATCH] install: attempt to use an already mounted ESP at the target
+
+Let's attempt to use an already mounted ESP at the target
+dest_root if one is already mounted there in a known ESP location,
+if failed, will fallback to mount ESP partition of the device.
+
+See https://github.com/coreos/coreos-assembler/pull/4161
+---
+ src/efi.rs | 22 +++++++++++++++-------
+ 1 file changed, 15 insertions(+), 7 deletions(-)
+
+diff --git a/src/efi.rs b/src/efi.rs
+index 1adc3d6..b8fc24c 100644
+--- a/src/efi.rs
++++ b/src/efi.rs
+@@ -345,14 +345,22 @@ impl Component for Efi {
+         let srcdir_name = component_updatedirname(self);
+         let ft = crate::filetree::FileTree::new_from_dir(&src_root.sub_dir(&srcdir_name)?)?;
+ 
+-        // Using `blockdev` to find the partition instead of partlabel because
+-        // we know the target install toplevel device already.
+-        let esp_device = blockdev::get_esp_partition(device)?
+-            .ok_or_else(|| anyhow::anyhow!("Failed to find ESP device"))?;
+-
+-        let destpath = &self.ensure_mounted_esp(Path::new(dest_root), Path::new(&esp_device))?;
++        // Let's attempt to use an already mounted ESP at the target
++        // dest_root if one is already mounted there in a known ESP location.
++        let destpath = if let Some(destdir) = self.get_mounted_esp(Path::new(dest_root))? {
++            destdir
++        } else {
++            // Using `blockdev` to find the partition instead of partlabel because
++            // we know the target install toplevel device already.
++            if device.is_empty() {
++                anyhow::bail!("Device value not provided");
++            }
++            let esp_device = blockdev::get_esp_partition(device)?
++                .ok_or_else(|| anyhow::anyhow!("Failed to find ESP device"))?;
++            self.mount_esp_device(Path::new(dest_root), Path::new(&esp_device))?
++        };
+ 
+-        let destd = &openat::Dir::open(destpath)
++        let destd = &openat::Dir::open(&destpath)
+             .with_context(|| format!("opening dest dir {}", destpath.display()))?;
+         validate_esp_fstype(destd)?;
+ 
+-- 
+2.49.0
+

rust-bootupd.spec

@@ -13,6 +13,8 @@ Source0:        %{url}/releases/download/v%{version}/bootupd-%{version}.tar.zstd
 Source1:        %{url}/releases/download/v%{version}/bootupd-%{version}-vendor.tar.zstd
 ExcludeArch:    %{ix86}
 
+Patch0:         0001-install-attempt-to-use-an-already-mounted-ESP-at-the.patch
+
 BuildRequires: git
 # For now, see upstream
 BuildRequires: make