92 lines
3.2 KiB
Plaintext
92 lines
3.2 KiB
Plaintext
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#!/usr/bin/env bash
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set -e
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die() {
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echo "$0: error: $1" >&2
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exit 1
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}
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# Usage: update-source-hash <attr> <version> [<new-source-hash>]
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attr=$1
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newVersion=$2
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newHash=$3
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nixFile=$(nix-instantiate --eval --strict -A "$attr.meta.position" | sed -re 's/^"(.*):[0-9]+"$/\1/')
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if [ ! -f "$nixFile" ]; then
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die "Couldn't evaluate '$attr.meta.position' to locate the .nix file!"
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fi
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oldHashAlgo=$(nix-instantiate --eval --strict -A "$attr.src.drvAttrs.outputHashAlgo" | tr -d '"')
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oldHash=$(nix-instantiate --eval --strict -A "$attr.src.drvAttrs.outputHash" | tr -d '"')
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if [ -z "$oldHashAlgo" -o -z "$oldHash" ]; then
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die "Couldn't evaluate old source hash from '$attr.src'!"
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fi
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if [ $(grep -c "$oldHash" "$nixFile") != 1 ]; then
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die "Couldn't locate old source hash '$oldHash' (or it appeared more than once) in '$nixFile'!"
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fi
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drvName=$(nix-instantiate --eval -E "with import ./. {}; (builtins.parseDrvName $attr.name).name" | tr -d '"')
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oldVersion=$(nix-instantiate --eval -E "with import ./. {}; $attr.version or (builtins.parseDrvName $attr.name).version" | tr -d '"')
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if [ -z "$drvName" -o -z "$oldVersion" ]; then
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die "Couldn't evaluate name and version from '$attr.name'!"
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fi
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if [ "$oldVersion" = "$newVersion" ]; then
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echo "$0: New version same as old version, nothing to do." >&2
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exit 0
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fi
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# Escape dots, there should not be any other regex characters allowed in store path names
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oldVersion=$(echo "$oldVersion" | sed -re 's|\.|\\.|g')
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if [ $(grep -c -E "^\s*(let\b)?\s*version\s+=\s+\"$oldVersion\"" "$nixFile") = 1 ]; then
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pattern="/\bversion\b\s*=/ s|\"$oldVersion\"|\"$newVersion\"|"
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elif [ $(grep -c -E "^\s*(let\b)?\s*name\s+=\s+\"$drvName-$oldVersion\"" "$nixFile") = 1 ]; then
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pattern="/\bname\b\s*=/ s|\"$drvName-$oldVersion\"|\"$drvName-$newVersion\"|"
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else
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die "Couldn't figure out where out where to patch in new version in '$attr'!"
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fi
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# Replace new version
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sed -i.bak "$nixFile" -re "$pattern"
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if cmp -s "$nixFile" "$nixFile.bak"; then
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die "Failed to replace version '$oldVersion' to '$newVersion' in '$attr'!"
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fi
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case "$oldHashAlgo" in
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sha256) hashLength=64 ;;
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sha512) hashLength=128 ;;
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*) die "Unhandled hash algorithm '$oldHashAlgo' in '$attr'!" ;;
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esac
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# Make a temporary all-zeroes hash of $hashLength characters
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tempHash=$(printf '%0*d' "$hashLength" 0)
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sed -i "$nixFile" -re "s|\"$oldHash\"|\"$tempHash\"|"
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if cmp -s "$nixFile" "$nixFile.bak"; then
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die "Failed to replace source hash of '$attr' to a temporary hash!"
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fi
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# If new hash not given on the command line, recalculate it ourselves.
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if [ -z "$newHash" ]; then
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nix-build --no-out-link -A "$attr.src" 2>"$attr.fetchlog" >/dev/null || true
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# FIXME: use nix-build --hash here once https://github.com/NixOS/nix/issues/1172 is fixed
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newHash=$(tail -n2 "$attr.fetchlog" | grep "output path .* has .* hash .* when .* was expected" | head -n1 | tr -dc '\040-\177' | awk '{ print $(NF-4) }')
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fi
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if [ -z "$newHash" ]; then
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cat "$attr.fetchlog" >&2
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die "Couldn't figure out new hash of '$attr.src'!"
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fi
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sed -i "$nixFile" -re "s|\"$tempHash\"|\"$newHash\"|"
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if cmp -s "$nixFile" "$nixFile.bak"; then
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die "Failed to replace temporary source hash of '$attr' to the final source hash!"
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fi
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rm -f "$nixFile.bak"
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rm -f "$attr.fetchlog"
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