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#!/usr/bin/env bash
set -e
# Get the latest versions from kernel.org
LINUXSED='s/.*linux-\([0-9]\+\(.[0-9]\+\)*\).*/\1/p'
KDATA="$(curl -s https://www.kernel.org | sed -n -e '/Download complete/p')"
VERSIONS=($(sed -n -e $LINUXSED <<< "$KDATA" | sort -Vr))
# Remove mainline version if there is a stable update
# Note due to sorting these two will always exist at the bottom
if grep -q "^${VERSIONS[1]}" <<< "${VERSIONS[0]}"; then
VERSIONS=(${VERSIONS[@]:0:1} ${VERSIONS[@]:2})
fi
# Inspect each file and see if it has the latest version
NIXPKGS="$(git rev-parse --show-toplevel)"
ls $NIXPKGS/pkgs/os-specific/linux/kernel | while read FILE; do
KERNEL="$(sed -n -e $LINUXSED <<< "$FILE")"
[ -z "$KERNEL" ] && continue
# Find the matching new kernel version
MATCHING=""
for V in "${VERSIONS[@]}"; do
if grep -q "^$KERNEL" <<< "$V"; then
MATCHING="$V"
break
fi
done
if [ -z "$MATCHING" ]; then
echo "Out-of-support $KERNEL"
continue
fi
# Inspect the nix expression to check for changes
DATA="$(<$NIXPKGS/pkgs/os-specific/linux/kernel/$FILE)"
URL="$(sed -n -e 's/.*url = "\(.*\)";.*/\1/p' <<< "$DATA" | sed -e "s/\${version}/$MATCHING/g")"
OLDVER=$(sed -n -e 's/.*version = "\(.*\)".*/\1/p' <<< "$DATA")
if [ "$OLDVER" = "$V" ]; then
echo "No updates for $KERNEL"
continue
fi
# Download the new file for the hash
if ! HASH="$(nix-prefetch-url $URL 2>/dev/null)"; then
echo "Failed to get hash of $URL"
continue
fi
sed -i -e "s/sha256 = \".*\"/sha256 = \"$HASH\"/g" $NIXPKGS/pkgs/os-specific/linux/kernel/$FILE
# Rewrite the expression
sed -i -e '/version = /d' $NIXPKGS/pkgs/os-specific/linux/kernel/$FILE
sed -i -e "\#buildLinux (args // rec {#a \ version = \"$V\";" $NIXPKGS/pkgs/os-specific/linux/kernel/$FILE
# Commit the changes
git add -u $NIXPKGS/pkgs/os-specific/linux/kernel/$FILE
git commit -m "linux: $OLDVER -> $V" >/dev/null 2>&1
echo "Updated $OLDVER -> $V"
done
# Update linux-rt
COMMIT=1 $NIXPKGS/pkgs/os-specific/linux/kernel/update-rt.sh
# Update linux-libre
COMMIT=1 $NIXPKGS/pkgs/os-specific/linux/kernel/update-libre.sh
# Update linux-hardened
COMMIT=1 $NIXPKGS/pkgs/os-specific/linux/kernel/hardened/update.py
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