134 lines
3.9 KiB
Bash
Executable File
134 lines
3.9 KiB
Bash
Executable File
#!/usr/bin/env bash
|
|
set -e
|
|
|
|
# --print: avoid dependency on environment
|
|
optPrint=
|
|
if [ "$1" == "--print" ]; then
|
|
optPrint=true
|
|
shift
|
|
fi
|
|
|
|
if [ "$#" != 1 ] && [ "$#" != 2 ]; then
|
|
cat <<EOF
|
|
Usage: $0 [--print] from-commit-spec [to-commit-spec]
|
|
You need to be in a git-controlled nixpkgs tree.
|
|
The current state of the tree will be used if the second commit is missing.
|
|
|
|
Examples:
|
|
effect of latest commit:
|
|
$ $0 HEAD^
|
|
$ $0 --print HEAD^
|
|
effect of the whole patch series for 'staging' branch:
|
|
$ $0 origin/staging staging
|
|
EOF
|
|
exit 1
|
|
fi
|
|
|
|
# A slightly hacky way to get the config.
|
|
parallel="$(echo 'config.rebuild-amount.parallel or false' | nix-repl . 2>/dev/null \
|
|
| grep -v '^\(nix-repl.*\)\?$' | tail -n 1 || true)"
|
|
|
|
echo "Estimating rebuild amount by counting changed Hydra jobs (parallel=${parallel:-unset})."
|
|
|
|
toRemove=()
|
|
|
|
cleanup() {
|
|
rm -rf "${toRemove[@]}"
|
|
}
|
|
trap cleanup EXIT
|
|
|
|
MKTEMP='mktemp --tmpdir nix-rebuild-amount-XXXXXXXX'
|
|
|
|
nixexpr() {
|
|
cat <<EONIX
|
|
let
|
|
lib = import $1/lib;
|
|
hydraJobs = import $1/pkgs/top-level/release.nix
|
|
# Compromise: accuracy vs. resources needed for evaluation.
|
|
{ supportedSystems = cfg.systems or [ "x86_64-linux" "x86_64-darwin" ]; };
|
|
cfg = (import $1 {}).config.rebuild-amount or {};
|
|
|
|
recurseIntoAttrs = attrs: attrs // { recurseForDerivations = true; };
|
|
|
|
# hydraJobs leaves recurseForDerivations as empty attrmaps;
|
|
# that would break nix-env and we also need to recurse everywhere.
|
|
tweak = lib.mapAttrs
|
|
(name: val:
|
|
if name == "recurseForDerivations" then true
|
|
else if lib.isAttrs val && val.type or null != "derivation"
|
|
then recurseIntoAttrs (tweak val)
|
|
else val
|
|
);
|
|
|
|
# Some of these contain explicit references to platform(s) we want to avoid;
|
|
# some even (transitively) depend on ~/.nixpkgs/config.nix (!)
|
|
blacklist = [
|
|
"tarball" "metrics" "manual"
|
|
"darwin-tested" "unstable" "stdenvBootstrapTools"
|
|
"moduleSystem" "lib-tests" # these just confuse the output
|
|
];
|
|
|
|
in
|
|
tweak (builtins.removeAttrs hydraJobs blacklist)
|
|
EONIX
|
|
}
|
|
|
|
# Output packages in tree $2 that weren't in $1.
|
|
# Changing the output hash or name is taken as a change.
|
|
# Extra nix-env parameters can be in $3
|
|
newPkgs() {
|
|
# We use files instead of pipes, as running multiple nix-env processes
|
|
# could eat too much memory for a standard 4GiB machine.
|
|
local -a list
|
|
for i in 1 2; do
|
|
local l="$($MKTEMP)"
|
|
list[$i]="$l"
|
|
toRemove+=("$l")
|
|
|
|
local expr="$($MKTEMP)"
|
|
toRemove+=("$expr")
|
|
nixexpr "${!i}" > "$expr"
|
|
|
|
nix-env -f "$expr" -qaP --no-name --out-path --show-trace $3 \
|
|
| sort > "${list[$i]}" &
|
|
|
|
if [ "$parallel" != "true" ]; then
|
|
wait
|
|
fi
|
|
done
|
|
|
|
wait
|
|
comm -13 "${list[@]}"
|
|
}
|
|
|
|
# Prepare nixpkgs trees.
|
|
declare -a tree
|
|
for i in 1 2; do
|
|
if [ -n "${!i}" ]; then # use the given commit
|
|
dir="$($MKTEMP -d)"
|
|
tree[$i]="$dir"
|
|
toRemove+=("$dir")
|
|
|
|
git clone --shared --no-checkout --quiet . "${tree[$i]}"
|
|
(cd "${tree[$i]}" && git checkout --quiet "${!i}")
|
|
else #use the current tree
|
|
tree[$i]="$(pwd)"
|
|
fi
|
|
done
|
|
|
|
newlist="$($MKTEMP)"
|
|
toRemove+=("$newlist")
|
|
# Notes:
|
|
# - the evaluation is done on x86_64-linux, like on Hydra.
|
|
# - using $newlist file so that newPkgs() isn't in a sub-shell (because of toRemove)
|
|
newPkgs "${tree[1]}" "${tree[2]}" '--argstr system "x86_64-linux"' > "$newlist"
|
|
|
|
# Hacky: keep only the last word of each attribute path and sort.
|
|
sed -n 's/\([^. ]*\.\)*\([^. ]*\) .*$/\2/p' < "$newlist" \
|
|
| sort | uniq -c
|
|
|
|
if [ -n "$optPrint" ]; then
|
|
echo
|
|
cat "$newlist"
|
|
fi
|