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79 lines
2.3 KiB
Bash
Executable File
79 lines
2.3 KiB
Bash
Executable File
#!/usr/bin/env nix-shell
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#!nix-shell -i bash -p git jq
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# Outputs a list of maintainers that would be pinged across two nixpkgs revisions.
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# Authors:
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# Morgan Jones (@numinit)
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# Tristan Ross (@RossComputerGuy)
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set -euo pipefail
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if [ $# -lt 2 ]; then
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echo "Usage: $0 <rev-from> <rev-to>" >&2
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exit 1
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fi
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repo="$(git rev-parse --show-toplevel)"
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system="$(nix-instantiate --eval --expr builtins.currentSystem)"
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rev1="$(git -C "$repo" rev-parse "$1")"
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rev2="$(git -C "$repo" rev-parse "$2")"
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echo "Touched files:" >&2
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git -C "$repo" diff --name-only "$rev1" "$rev2" \
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| jq --raw-input --slurp 'split("\n")[:-1]' | tee "$TMPDIR/touched-files.json" >&2
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# Runs an eval in the given worktree, outputting the path to $TMPDIR/$1.path.
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# $1: The revision SHA.
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eval_in_worktree() (
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mkdir -p .worktree
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local rev="$1"
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local tree=".worktree/$rev"
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if [ ! -d "$tree" ]; then
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git -C "$repo" worktree add -f -d "$tree" "$rev" >&2
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fi
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cd "$tree"
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local workdir="$TMPDIR/$rev"
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rm -rf "$workdir"
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mkdir -p "$workdir"
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nix-build ci -A eval.attrpathsSuperset -o "$workdir/paths" >&2
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mkdir -p "$workdir/intermediates"
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nix-build ci -A eval.singleSystem \
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--arg evalSystem "$system" \
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--arg attrpathFile "$workdir/paths/paths.json" \
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--arg chunkSize ${CHUNK_SIZE:-10000} \
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-o "$workdir/intermediates/.intermediate-1" >&2
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# eval.combine nix-build needs a directory, not a symlink
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cp -RL "$workdir/intermediates/.intermediate-1" "$workdir/intermediates/intermediate-1"
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chmod -R +w "$workdir/intermediates/intermediate-1"
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rm -rf "$workdir/intermediates/.intermediate-1"
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nix-build ci -A eval.combine \
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--arg resultsDir "$workdir/intermediates" \
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-o "$workdir/result" >&2
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)
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eval_in_worktree "$rev1" &
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pid1=$!
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eval_in_worktree "$rev2" &
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pid2=$!
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wait $pid1
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wait $pid2
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path1="$TMPDIR/$rev1"
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path2="$TMPDIR/$rev2"
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# Use the repo this script was executed in to get accurate maintainer info
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nix-build "$repo/ci" -A eval.compare \
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--arg beforeResultDir "$path1/result" \
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--arg afterResultDir "$path2/result" \
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--arg touchedFilesJson "$TMPDIR/touched-files.json" \
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--arg byName true \
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-o comparison
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echo "Pinged maintainers (check $repo/comparison for more details)" >&2
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jq < comparison/maintainers.json
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