firmware: de-dup firmware list parsing

Edit: There were four copies of the same logic to keep in sync;
Originally this patch deduplicated each file, but leaving a copy of
the new function in each, thus reducing the duplication but not
eliminating it. A later patch moved it into a shared function file
following further enhancements to the code in question. This has
since been revised to have the function moved to a shared file here,
which simplifies and gives a cleaner diff.

Gbp-Dch: Short
Closes: #952908

1 files changed, 37 insertions, 0 deletions

diff --git a/functions/firmwarelists.sh b/functions/firmwarelists.sh
new file mode 100755
index 000000000..5c552fc98
--- /dev/null
+++ b/functions/firmwarelists.sh
@@ -0,0 +1,37 @@
+#!/bin/sh
+
+## live-build(7) - System Build Scripts
+## Copyright (C) 2006-2015 Daniel Baumann <mail@daniel-baumann.ch>
+##
+## This program comes with ABSOLUTELY NO WARRANTY; for details see COPYING.
+## This is free software, and you are welcome to redistribute it
+## under certain conditions; see COPYING for details.
+
+# Updates FIRMWARE_PACKAGES with list of packages determined from specified
+# archive areas of specified distro, based upon reading archive content file.
+#
+# Shared by chroot_firmware and installer_debian-installer
+#
+# Assumption: firmware packages install files into /lib/firmware
+Firmware_List_From_Contents () {
+	local MIRROR_CHROOT="${1}"
+	local DISTRO_CHROOT="${2}"
+	local ARCHIVE_AREAS="${3}"
+
+	local CONTENTS_FILE="cache/contents.chroot/contents.${DISTRO_CHROOT}.${LB_ARCHITECTURES}"
+
+	# Ensure fresh
+	rm -f "${CONTENTS_FILE}"
+
+	for _ARCHIVE_AREA in ${ARCHIVE_AREAS}
+	do
+		local CONTENTS_URL="${MIRROR_CHROOT}/dists/${DISTRO_CHROOT}/${_ARCHIVE_AREA}/Contents-${LB_ARCHITECTURES}.gz"
+
+		wget ${WGET_OPTIONS} "${CONTENTS_URL}" -O - | gunzip -c >> "${CONTENTS_FILE}"
+	done
+
+	FIRMWARE_PACKAGES="${FIRMWARE_PACKAGES} $(awk '/^lib\/firmware/ { print $2 }' "${CONTENTS_FILE}" | sort -u)"
+
+	# Don't waste disk space preserving since always getting fresh
+	rm -f "${CONTENTS_FILE}"
+}