From 1e215d073b456741c1a673e029eac88b57dc6e7b Mon Sep 17 00:00:00 2001
From: TomIO <tom@termux.dev>
Date: Sat, 21 Jun 2025 01:08:13 +0200
Subject: [PATCH] fix(main/zig): check the Kernel version and stop if
 unsupported at install

---
 packages/zig/build.sh      | 15 +++++++++++++
 packages/zig/preinst.sh.in | 44 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 59 insertions(+)
 create mode 100644 packages/zig/preinst.sh.in

diff --git a/packages/zig/build.sh b/packages/zig/build.sh
index b5f91908777b090..9f637410ff38e44 100644
--- a/packages/zig/build.sh
+++ b/packages/zig/build.sh
@@ -4,6 +4,7 @@ TERMUX_PKG_LICENSE="MIT"
 TERMUX_PKG_LICENSE_FILE="zig/LICENSE"
 TERMUX_PKG_MAINTAINER="@termux"
 TERMUX_PKG_VERSION="0.14.1"
+TERMUX_PKG_REVISION=1
 TERMUX_PKG_SRCURL=https://github.com/ziglang/zig/releases/download/${TERMUX_PKG_VERSION}/zig-bootstrap-${TERMUX_PKG_VERSION}.tar.xz
 TERMUX_PKG_SHA256=89b2fce50bfbb1eee29c382193d22c6eb0c7da3a96b5ba6d05e0af2945b3ca3d
 TERMUX_PKG_BUILD_IN_SRC=true
@@ -44,3 +45,17 @@ termux_step_post_massage() {
 		"$TERMUX_PKG_MASSAGEDIR/$TERMUX_PREFIX_CLASSICAL/bin/zig" init
 	)
 }
+
+termux_step_create_debscripts() {
+	# Minimum supported kernel version for this version of Zig.
+	# Zig pegs this to the oldest supported Debian LTS build
+	# https://github.com/ziglang/zig/blob/0.14.1/lib/std/Target.zig#L454-L469
+	# https://github.com/ziglang/zig/commit/0d4d8dfc1583138a59147f1aab5eec803a23adb1
+	# https://github.com/ziglang/zig/issues/20423
+	local ZIG_MINIMUM="4.19.0"
+
+	sed -e "s|@ZIG_MINIMUM@|$ZIG_MINIMUM|g" \
+		-e "s|@TERMUX_PKG_VERSION@|$TERMUX_PKG_VERSION|g" \
+		-e "s|@TERMUX_PACKAGE_FORMAT@|$TERMUX_PACKAGE_FORMAT|g" \
+		"$TERMUX_PKG_BUILDER_DIR/preinst.sh.in" > ./preinst
+}
diff --git a/packages/zig/preinst.sh.in b/packages/zig/preinst.sh.in
new file mode 100644
index 000000000000000..714878ae9495b88
--- /dev/null
+++ b/packages/zig/preinst.sh.in
@@ -0,0 +1,44 @@
+#!@TERMUX_PREFIX@/bin/sh
+# shellcheck shell=sh
+
+echo "Checking that your device meets the"
+echo "minimum kernel version for Zig @TERMUX_PKG_VERSION@"
+echo
+
+is_supported() {
+	_KERNEL_VERSION="$1"
+	_MINIMUM_VERSION="$2"
+	# shellcheck disable=SC2194 # We replace this in the build script
+	case "@TERMUX_PACKAGE_FORMAT@" in
+		apt)
+			if dpkg --compare-versions "$_KERNEL_VERSION" lt "$_MINIMUM_VERSION"; then
+				return 1
+			fi
+		;;
+		pacman)
+			if [ "$(vercmp "$_KERNEL_VERSION" "$_MINIMUM_VERSION")" != 1 ]; then
+				return 1
+			fi
+		;;
+	esac
+return 0
+}
+
+KERNEL_VERSION="$(uname -r)"
+if ! is_supported "$KERNEL_VERSION" "@ZIG_MINIMUM@"; then
+	echo "Your device's kernel version is too old for Zig @TERMUX_PKG_VERSION@"
+	if is_supported "$KERNEL_VERSION" "3.16.0"; then
+		echo "Your device does however support Zig 0.13.0 or earlier."
+		# uncomment these if/when we move old Zig versions to the TUR.
+		# echo "You can install it from the TUR."
+		# echo ""
+		# echo "pkg up"
+		# echo "pkg i tur-repo"
+		# echo "pkg i zig-0.13"
+	else
+		echo "Your device does not support any version of Zig"
+		echo "There's nothing we can do to make it supported."
+	fi
+	exit 1
+fi
+exit 0