77 lines
2.2 KiB
Bash
Executable file
77 lines
2.2 KiB
Bash
Executable file
#!/usr/bin/env bash
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set -euo pipefail
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# To update all rt kernels run: ./update-rt.sh
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# To update just one ./linux-rt-5.X.nix run: ./update-rt.sh ./linux-rt-5.X.nix
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# To add a new kernel branch 5.Y run: ./update-rt.sh ./linux-rt-5.Y.nix
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# (with nonexistent .nix file) and update all-packages.nix.
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# To commit run with: env COMMIT=1
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mirror=https://kernel.org/pub/linux/kernel
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main() {
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if [ $# -ge 1 ]; then
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update-if-needed "$1"
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else
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update-all-if-needed
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fi
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}
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update-all-if-needed() {
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for f in "$(dirname "$0")"/linux-rt-*.nix; do
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update-if-needed "$f"
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done
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}
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file-version() {
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file="$1" # e.g. ./linux-rt-5.4.nix
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if [ -e "$file" ]; then
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grep ' version = ' "$file" | grep -o '[0-9].[^"]*'
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fi
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}
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latest-rt-version() {
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branch="$1" # e.g. 5.4
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curl -sL "$mirror/projects/rt/$branch/sha256sums.asc" |
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sed -ne '/.patch.xz/ { s/.*patch-\(.*\).patch.xz/\1/; p; q }'
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}
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update-if-needed() {
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file="$1" # e.g. ./linux-rt-5.4.nix (created if does not exist)
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branch=$(basename "$file" .nix) # e.g. linux-rt-5.4
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branch=${branch#linux-rt-} # e.g. 5.4
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cur=$(file-version "$file") # e.g. 5.4.59-rt36 or empty
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new=$(latest-rt-version "$branch") # e.g. 5.4.61-rt37
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kversion=${new%-*} # e.g. 5.4.61
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major=${branch%.*} # e.g 5
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nixattr="linux-rt_${branch/./_}"
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if [ "$new" = "$cur" ]; then
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echo "$nixattr: $cur (up-to-date)"
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return
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fi
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khash=$(nix-prefetch-url "$mirror/v${major}.x/linux-${kversion}.tar.xz")
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phash=$(nix-prefetch-url "$mirror/projects/rt/${branch}/older/patch-${new}.patch.xz")
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if [ "$cur" ]; then
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msg="$nixattr: $cur -> $new"
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else
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msg="$nixattr: init at $new"
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prev=$(ls -v "$(dirname "$0")"/linux-rt-*.nix | tail -1)
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cp "$prev" "$file"
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cur=$(file-version "$file")
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fi
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echo "$msg"
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sed -i "$file" \
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-e "s/$cur/$new/" \
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-e "s|kernel/v[0-9]*|kernel/v$major|" \
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-e "1,/.patch.xz/ s/sha256 = .*/sha256 = \"$khash\";/" \
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-e "1,/.patch.xz/! s/sha256 = .*/sha256 = \"$phash\";/"
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if [ "${COMMIT:-}" ]; then
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git add "$file"
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git commit -m "$msg"
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fi
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}
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return 2>/dev/null || main "$@"
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