[PATCH v2 2/7] wic: add utility library for common bits of isar plugins

[Henning Schild <henning.schild@siemens.com>]

Signed-off-by: Henning Schild <henning.schild@siemens.com>
---
 .../scripts/lib/wic/plugins/isarpluginbase.py | 39 +++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 meta/scripts/lib/wic/plugins/isarpluginbase.py

diff --git a/meta/scripts/lib/wic/plugins/isarpluginbase.py b/meta/scripts/lib/wic/plugins/isarpluginbase.py
new file mode 100644
index 000000000000..185e2ea14fc7
--- /dev/null
+++ b/meta/scripts/lib/wic/plugins/isarpluginbase.py
@@ -0,0 +1,39 @@
+#
+# Copyright (c) Siemens AG, 2021
+#
+# SPDX-License-Identifier: MIT
+#
+# DESCRIPTION
+# This implements a few utility functions to be used in isar-specific plugins.
+
+import os
+
+def isar_populate_boot_cmd(rootfs_dir, hdddir):
+    # copy all files from rootfs/boot into boot partition
+    # no not copy symlinks (ubuntu places them here) because targetfs is fat
+    return "find %s/boot -type f -exec cp -a {} %s ;" % (rootfs_dir, hdddir)
+
+def isar_get_filenames(rootfs_dir):
+    # figure out the real filename in /boot by following debian symlinks
+    for kernel_symlink in ["vmlinuz", "vmlinux" ]:
+        kernel_file_abs = os.path.join(rootfs_dir, kernel_symlink)
+        if os.path.isfile(kernel_file_abs):
+            break
+        # in ubuntu those symlinks could be in /boot
+        kernel_file_abs = os.path.join(rootfs_dir, "boot", kernel_symlink)
+        if os.path.isfile(kernel_file_abs):
+            break
+
+    kernel = os.path.basename(os.path.realpath(kernel_file_abs))
+    initrd =  "initrd.img"
+    kernel_parts = kernel.split("-")
+    kernel_suffix = "-".join(kernel_parts[1:])
+    if kernel_suffix:
+        initrd += "-%s" % kernel_suffix
+
+    if not os.path.isfile(os.path.join(rootfs_dir, "boot", kernel)):
+        raise WicError("kernel %s not found" % (os.path.join(rootfs_dir, "boot", kernel)))
+    if not os.path.isfile(os.path.join(rootfs_dir, "boot", initrd)):
+        raise WicError("initrd %s not found" % (os.path.join(rootfs_dir, "boot", initrd)))
+
+    return kernel, initrd
-- 
2.32.0