From bcd14e609c4bf8bfb02206b349409328ddc22939 Mon Sep 17 00:00:00 2001
From: Andrew Benson <abenson+void@gmail.com>
Date: Mon, 29 May 2023 13:55:46 -0500
Subject: [PATCH] linux-base: post-install hook for /boot freespace

Co-authored-by: classabbyamp <5366828+classabbyamp@users.noreply.github.com>
---
 srcpkgs/linux-base/files/50-bootsize.postinst | 35 +++++++++++++++++++
 srcpkgs/linux-base/template                   |  7 ++--
 2 files changed, 40 insertions(+), 2 deletions(-)
 create mode 100644 srcpkgs/linux-base/files/50-bootsize.postinst

diff --git a/srcpkgs/linux-base/files/50-bootsize.postinst b/srcpkgs/linux-base/files/50-bootsize.postinst
new file mode 100644
index 000000000000..6a313d638624
--- /dev/null
+++ b/srcpkgs/linux-base/files/50-bootsize.postinst
@@ -0,0 +1,35 @@
+#!/bin/sh
+#
+# Kernel hook to check for filled /boot partitions
+#
+# Arguments passed to this script: $1 pkgname, $2 version.
+#
+PKGNAME="$1"
+VERSION="$2"
+
+# freespace = blocksize * freeblocks
+freespace=$(( $(stat -f -c %S /boot) * $(stat -f -c %f /boot) ))
+
+vmlinuz=$(find /boot -maxdepth 1 -type f -name 'vmlinuz*' | xargs stat -c '%s' | sort -r | head -n1)
+initramfs=$(find /boot -maxdepth 1 -type f -name 'initramfs*' | xargs stat -c '%s' | sort -r | head -n1)
+totalneeded=$(( 2 * (initramfs + vmlinuz) ))
+
+# freespace for /boot is <=  2*(largest kernel + largest initrd)
+if [ $freespace -le $totalneeded ]; then
+	if [ -z "$NO_COLOR" -a -t 1 -a -n "$(tput colors)" ]; then
+		# Set output to be bold and red, if supported
+		tput setaf 1
+		tput bold
+	fi
+	cat <<-'ENDMSG'
+	 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+	 * WARNING: /boot has less than 100MB available. Use `vkpurge` to ensure *
+	 * there will be sufficient space to write the next kernel and generate  *
+	 * its initrd. Your system may otherwise become unbootable.              *
+	 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+	ENDMSG
+	if [ -z "$NO_COLOR" -a -t 1 -a -n "$(tput colors)" ]; then
+		# Reset output back to normal
+		tput sgr0
+	fi
+fi
diff --git a/srcpkgs/linux-base/template b/srcpkgs/linux-base/template
index 249f21fa27f2..d04e7ad12bb6 100644
--- a/srcpkgs/linux-base/template
+++ b/srcpkgs/linux-base/template
@@ -1,8 +1,7 @@
 # Template file for 'linux-base'
 pkgname=linux-base
-version=2021.07.21
+version=2023.05.29
 revision=1
-build_style=meta
 short_desc="Linux kernel base dependencies"
 maintainer="Érico Nogueira <ericonr@disroot.org>"
 license="Public Domain"
@@ -16,3 +15,7 @@ case "$XBPS_TARGET_MACHINE" in
 		depends="linux-firmware-amd linux-firmware-nvidia linux-firmware-network dracut"
 		;;
 esac
+
+do_install() {
+	vinstall ${FILESDIR}/50-bootsize.postinst 0755 etc/kernel.d/post-install 50-bootsize
+}