Build initramfs images only once

Place custom mkinitcpio.conf in airootfs.
Use a custom mkinitcpio preset to specify generated image file path.

2 files changed, 80 insertions, 0 deletions

diff --git a/configs/releng/airootfs/etc/mkinitcpio.conf b/configs/releng/airootfs/etc/mkinitcpio.conf
new file mode 100644
index 0000000..3476157
--- /dev/null
+++ b/configs/releng/airootfs/etc/mkinitcpio.conf
@@ -0,0 +1,69 @@
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+# vim:set ft=sh
+# MODULES
+# The following modules are loaded before any boot hooks are
+# run.  Advanced users may wish to specify all system modules
+# in this array.  For instance:
+#     MODULES=(piix ide_disk reiserfs)
+MODULES=()
+
+# BINARIES
+# This setting includes any additional binaries a given user may
+# wish into the CPIO image.  This is run last, so it may be used to
+# override the actual binaries included by a given hook
+# BINARIES are dependency parsed, so you may safely ignore libraries
+BINARIES=()
+
+# FILES
+# This setting is similar to BINARIES above, however, files are added
+# as-is and are not parsed in any way.  This is useful for config files.
+FILES=()
+
+# HOOKS
+# This is the most important setting in this file.  The HOOKS control the
+# modules and scripts added to the image, and what happens at boot time.
+# Order is important, and it is recommended that you do not change the
+# order in which HOOKS are added.  Run 'mkinitcpio -H <hook name>' for
+# help on a given hook.
+# 'base' is _required_ unless you know precisely what you are doing.
+# 'udev' is _required_ in order to automatically load modules
+# 'filesystems' is _required_ unless you specify your fs modules in MODULES
+# Examples:
+##   This setup specifies all modules in the MODULES setting above.
+##   No raid, lvm2, or encrypted root is needed.
+#    HOOKS=(base)
+#
+##   This setup will autodetect all modules for your system and should
+##   work as a sane default
+#    HOOKS=(base udev autodetect block filesystems)
+#
+##   This setup will generate a 'full' image which supports most systems.
+##   No autodetection is done.
+#    HOOKS=(base udev block filesystems)
+#
+##   This setup assembles a pata mdadm array with an encrypted root FS.
+##   Note: See 'mkinitcpio -H mdadm' for more information on raid devices.
+#    HOOKS=(base udev block mdadm encrypt filesystems)
+#
+##   This setup loads an lvm2 volume group on a usb device.
+#    HOOKS=(base udev block lvm2 filesystems)
+#
+##   NOTE: If you have /usr on a separate partition, you MUST include the
+#    usr, fsck and shutdown hooks.
+HOOKS=(base udev memdisk archiso_shutdown archiso archiso_loop_mnt archiso_pxe_common archiso_pxe_nbd archiso_pxe_http archiso_pxe_nfs archiso_kms block filesystems keyboard)
+
+# COMPRESSION
+# Use this to compress the initramfs image. By default, gzip compression
+# is used. Use 'cat' to create an uncompressed image.
+#COMPRESSION="gzip"
+#COMPRESSION="bzip2"
+#COMPRESSION="lzma"
+COMPRESSION="xz"
+#COMPRESSION="lzop"
+#COMPRESSION="lz4"
+
+# COMPRESSION_OPTIONS
+# Additional options for the compressor
+#COMPRESSION_OPTIONS=()
diff --git a/configs/releng/airootfs/etc/mkinitcpio.d/linux.preset b/configs/releng/airootfs/etc/mkinitcpio.d/linux.preset
new file mode 100644
index 0000000..a1949cd
--- /dev/null
+++ b/configs/releng/airootfs/etc/mkinitcpio.d/linux.preset
@@ -0,0 +1,11 @@
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+# mkinitcpio preset file for the 'linux' package on archiso
+
+PRESETS=('archiso')
+
+ALL_kver='/boot/vmlinuz-linux'
+ALL_config='/etc/mkinitcpio.conf'
+
+archiso_image="/boot/archiso.img"