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#!/usr/bin/env bash
set -e
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scriptName=update-source-versions # do not use the .wrapped name
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die() {
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echo "$scriptName: error: $1" >&2
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exit 1
}
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usage() {
echo "Usage: $scriptName <attr> <version> [<new-source-hash>] [<new-source-url>]"
echo " [--version-key=<version-key>] [--system=<system>] [--file=<file-to-update>]"
}
args=()
for arg in "$@"; do
case $arg in
--system=*)
systemArg="--system ${arg#*=}"
;;
--version-key=*)
versionKey="${arg#*=}"
;;
--file=*)
nixFile="${arg#*=}"
if [ ! -f "$nixFile" ]; then
die "Could not find provided file $nixFile"
fi
;;
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--ignore-same-hash)
ignoreSameHash="true"
;;
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--help)
usage
exit 0
;;
--*)
echo "$scriptName: Unknown argument: " $arg
usage
exit 1
;;
*)
args["${#args[*]}"]=$arg
;;
esac
done
attr=${args[0]}
newVersion=${args[1]}
newHash=${args[2]}
newUrl=${args[3]}
if [ "${#args[*]}" -lt 2 ]; then
echo "$scriptName: Too few arguments"
usage
exit 1
fi
if [ "${#args[*]}" -gt 4 ]; then
echo "$scriptName: Too many arguments"
usage
exit 1
fi
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if [ -z "$versionKey" ]; then
versionKey=version
fi
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if [ -z "$nixFile" ]; then
nixFile=$(nix-instantiate $systemArg --eval --strict -A "$attr.meta.position" | sed -re 's/^"(.*):[0-9]+"$/\1/')
if [ ! -f "$nixFile" ]; then
die "Couldn't evaluate '$attr.meta.position' to locate the .nix file!"
fi
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fi
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oldHashAlgo=$(nix-instantiate $systemArg --eval --strict -A "$attr.src.drvAttrs.outputHashAlgo" | tr -d '"')
oldHash=$(nix-instantiate $systemArg --eval --strict -A "$attr.src.drvAttrs.outputHash" | tr -d '"')
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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 '$nixFile'!"
fi
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oldUrl=$(nix-instantiate $systemArg --eval -E "with import ./. {}; builtins.elemAt $attr.src.drvAttrs.urls 0" | tr -d '"')
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if [ -z "$oldUrl" ]; then
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oldUrl=$(nix-instantiate $systemArg --eval -E "with import ./. {}; $attr.src.url" | tr -d '"')
if [ -z "$oldUrl" ]; then
die "Couldn't evaluate source url from '$attr.src'!"
fi
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fi
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drvName=$(nix-instantiate $systemArg --eval -E "with import ./. {}; (builtins.parseDrvName $attr.name).name" | tr -d '"')
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oldVersion=$(nix-instantiate $systemArg --eval -E "with import ./. {}; $attr.${versionKey} or (builtins.parseDrvName $attr.name).version" | tr -d '"')
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if [ -z "$drvName" -o -z "$oldVersion" ]; then
die "Couldn't evaluate name and version from '$attr.name'!"
fi
if [ "$oldVersion" = "$newVersion" ]; then
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echo "$scriptName: New version same as old version, nothing to do." >&2
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exit 0
fi
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# Escape regex metacharacter that are allowed in store path names
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oldVersionEscaped=$(echo "$oldVersion" | sed -re 's|[.+]|\\&|g')
oldUrlEscaped=$(echo "$oldUrl" | sed -re 's|[${}.+]|\\&|g')
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if [ $(grep -c -E "^\s*(let\b)?\s*$versionKey\s*=\s*\"$oldVersionEscaped\"" "$nixFile") = 1 ]; then
pattern="/\b$versionKey\b\s*=/ s|\"$oldVersionEscaped\"|\"$newVersion\"|"
elif [ $(grep -c -E "^\s*(let\b)?\s*name\s*=\s*\"[^\"]+-$oldVersionEscaped\"" "$nixFile") = 1 ]; then
pattern="/\bname\b\s*=/ s|-$oldVersionEscaped\"|-$newVersion\"|"
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else
die "Couldn't figure out where out where to patch in new version in '$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 '$attr'!"
fi
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# Replace new URL
if [ -n "$newUrl" ]; then
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sed -i "$nixFile" -re "s|\"$oldUrlEscaped\"|\"$newUrl\"|"
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if cmp -s "$nixFile" "$nixFile.bak"; then
die "Failed to replace source URL '$oldUrl' to '$newUrl' in '$attr'!"
fi
fi
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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
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nix-build $systemArg --no-out-link -A "$attr.src" 2>"$attr.fetchlog" >/dev/null || true
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# FIXME: use nix-build --hash here once https://github.com/NixOS/nix/issues/1172 is fixed
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newHash=$(egrep -v "killing process|dependencies couldn't be built|wanted: " "$attr.fetchlog" | tail -n2 | sed "s~output path .* has .* hash ‘ \(.*\)’ when .* was expected\|fixed-output derivation produced path '.*' with .* hash '\(.*\)' instead of the expected hash '.*'\| got: .*:\(.*\)~\1\2\3~" | head -n1)
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fi
if [ -z "$newHash" ]; then
cat "$attr.fetchlog" >&2
die "Couldn't figure out new hash of '$attr.src'!"
fi
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if [ -z "${ignoreSameHash}" ] && [ "$oldVersion" != "$newVersion" ] && [ "$oldHash" = "$newHash" ]; then
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mv "$nixFile.bak" "$nixFile"
die "Both the old and new source hashes of '$attr.src' were equivalent. Please fix the package's source URL to be dependent on '\${version}'!"
fi
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sed -i "$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"