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https://github.com/NixOS/nixpkgs.git
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77536af43b
Right now the worst case chain of events for building an ISO on Hydra is
- copy everything to squashfs builder
- run squashfs builder
- download squashfs from builder
- compress squashfs
- upload squashfs to S3
- copy squashfs to ISO builder
- run ISO builder
- download ISO from builder
- compress ISO
- upload ISO to S3
This inlines the squashfs build into the ISO build, which makes it
- copy everything to ISO builder
- run ISO builder
- download ISO from builder
- compress ISO
- upload ISO to S3
Which should reduce queue runner load by $alot per ISO, which we have four of on small channels
(one release, one test per arch) and a lot more than four of on large channels (with various desktops)
135 lines
3.7 KiB
Bash
135 lines
3.7 KiB
Bash
# Remove the initial slash from a path, since genisofs likes it that way.
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stripSlash() {
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res="$1"
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if test "${res:0:1}" = /; then res=${res:1}; fi
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}
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# Escape potential equal signs (=) with backslash (\=)
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escapeEquals() {
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echo "$1" | sed -e 's/\\/\\\\/g' -e 's/=/\\=/g'
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}
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# Queues an file/directory to be placed on the ISO.
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# An entry consists of a local source path (2) and
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# a destination path on the ISO (1).
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addPath() {
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target="$1"
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source="$2"
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echo "$(escapeEquals "$target")=$(escapeEquals "$source")" >> pathlist
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}
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stripSlash "$bootImage"; bootImage="$res"
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if test -n "$bootable"; then
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# The -boot-info-table option modifies the $bootImage file, so
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# find it in `contents' and make a copy of it (since the original
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# is read-only in the Nix store...).
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for ((i = 0; i < ${#targets[@]}; i++)); do
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stripSlash "${targets[$i]}"
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if test "$res" = "$bootImage"; then
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echo "copying the boot image ${sources[$i]}"
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cp "${sources[$i]}" boot.img
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chmod u+w boot.img
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sources[$i]=boot.img
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fi
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done
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isoBootFlags="-eltorito-boot ${bootImage}
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-eltorito-catalog .boot.cat
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-no-emul-boot -boot-load-size 4 -boot-info-table
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--sort-weight 1 /isolinux" # Make sure isolinux is near the beginning of the ISO
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fi
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if test -n "$usbBootable"; then
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usbBootFlags="-isohybrid-mbr ${isohybridMbrImage}"
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fi
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if test -n "$efiBootable"; then
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efiBootFlags="-eltorito-alt-boot
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-e $efiBootImage
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-no-emul-boot
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-isohybrid-gpt-basdat"
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fi
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touch pathlist
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# Add the individual files.
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for ((i = 0; i < ${#targets[@]}; i++)); do
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stripSlash "${targets[$i]}"
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addPath "$res" "${sources[$i]}"
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done
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# Add the closures of the top-level store objects.
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for i in $(< $closureInfo/store-paths); do
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addPath "${i:1}" "$i"
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done
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# If needed, build a squashfs and add that
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if [[ -n "$squashfsCommand" ]]; then
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(out="nix-store.squashfs" eval "$squashfsCommand")
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addPath "nix-store.squashfs" "nix-store.squashfs"
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fi
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# Also include a manifest of the closures in a format suitable for
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# nix-store --load-db.
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if [[ ${#objects[*]} != 0 ]]; then
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cp $closureInfo/registration nix-path-registration
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addPath "nix-path-registration" "nix-path-registration"
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fi
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# Add symlinks to the top-level store objects.
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for ((n = 0; n < ${#objects[*]}; n++)); do
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object=${objects[$n]}
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symlink=${symlinks[$n]}
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if test "$symlink" != "none"; then
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mkdir -p $(dirname ./$symlink)
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ln -s $object ./$symlink
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addPath "$symlink" "./$symlink"
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fi
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done
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mkdir -p $out/iso
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# daed2280-b91e-42c0-aed6-82c825ca41f3 is an arbitrary namespace, to prevent
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# independent applications from generating the same UUID for the same value.
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# (the chance of that being problematic seem pretty slim here, but that's how
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# version-5 UUID's work)
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xorriso="xorriso
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-boot_image any gpt_disk_guid=$(uuid -v 5 daed2280-b91e-42c0-aed6-82c825ca41f3 $out | tr -d -)
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-volume_date all_file_dates =$SOURCE_DATE_EPOCH
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-as mkisofs
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-iso-level 3
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-volid ${volumeID}
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-appid nixos
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-publisher nixos
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-graft-points
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-full-iso9660-filenames
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-joliet
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${isoBootFlags}
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${usbBootFlags}
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${efiBootFlags}
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-r
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-path-list pathlist
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--sort-weight 0 /
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"
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$xorriso -output $out/iso/$isoName
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if test -n "$compressImage"; then
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echo "Compressing image..."
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zstd -T$NIX_BUILD_CORES --rm $out/iso/$isoName
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fi
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mkdir -p $out/nix-support
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echo $system > $out/nix-support/system
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if test -n "$compressImage"; then
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echo "file iso $out/iso/$isoName.zst" >> $out/nix-support/hydra-build-products
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else
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echo "file iso $out/iso/$isoName" >> $out/nix-support/hydra-build-products
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fi
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