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