[PATCH 1/2] image-bootfiles.bbclass: new class, copy boot files to /boot on rfs

[Marcus Folkesson <marcus.folkesson@gmail.com>]

image-bootfiles class copy files listed IMAGE_BOOT_FILES
to the /boot directory of the root filesystem.

This is useful when there is no explicit boot partition but all boot
files should instead reside inside the root filesystem.

Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
---
 meta/classes/image-bootfiles.bbclass | 69 ++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 meta/classes/image-bootfiles.bbclass

diff --git a/meta/classes/image-bootfiles.bbclass b/meta/classes/image-bootfiles.bbclass
new file mode 100644
index 0000000000..850e14e4bb
--- /dev/null
+++ b/meta/classes/image-bootfiles.bbclass
@@ -0,0 +1,69 @@
+#
+# Writes IMAGE_BOOT_FILES to the /boot directory
+#
+# Copyright (C) 2024 Marcus Folkesson
+# Author: Marcus Folkesson <marcus.folkesson@gmail.com>
+#
+# Licensed under the MIT license, see COPYING.MIT for details
+# Inspired of bootimg-partition.py
+#
+# Usage: add INHERIT += "image-bootfiles" to your conf file
+#
+
+def bootfiles_populate(d):
+    import re
+    from glob import glob
+    import shutil
+
+    boot_files = d.getVar("IMAGE_BOOT_FILES")
+    deploy_image_dir = d.getVar("DEPLOY_DIR_IMAGE")
+    boot_dir = d.getVar("IMAGE_ROOTFS") + "/boot"
+    install_files = []
+
+    if boot_files is None:
+        return
+
+    # list of tuples (src_name, dst_name)
+    deploy_files = []
+    for src_entry in re.findall(r'[\w;\-\./\*]+', boot_files):
+        if ';' in src_entry:
+            dst_entry = tuple(src_entry.split(';'))
+            if not dst_entry[0] or not dst_entry[1]:
+                raise bb.parse.SkipRecipe('Malformed boot file entry: %s' % src_entry)
+        else:
+            dst_entry = (src_entry, src_entry)
+
+        deploy_files.append(dst_entry)
+
+    for deploy_entry in deploy_files:
+        src, dst = deploy_entry
+        if '*' in src:
+            # by default install files under their basename
+            entry_name_fn = os.path.basename
+            if dst != src:
+                # unless a target name was given, then treat name
+                # as a directory and append a basename
+                entry_name_fn = lambda name: \
+                                os.path.join(dst,
+                                             os.path.basename(name))
+
+
+                srcs = glob(os.path.join(deploy_image_dir, src))
+                for entry in srcs:
+                    src = os.path.relpath(entry, deploy_mage_dir)
+                    entry_dst_name = entry_name_fn(entry)
+                    install_files.append((src, entry_dst_name))
+            else:
+                install_files.append((src, dst))
+
+    for entry in install_files:
+        src, dst = entry
+        image_src = os.path.join(deploy_image_dir, src)
+        image_dst = os.path.join(boot_dir, dst)
+        shutil.copyfile(image_src, image_dst)
+
+python bootfiles () {
+   bootfiles_populate(d),
+}
+
+IMAGE_PREPROCESS_COMMAND += "bootfiles;"
-- 
2.44.0