209 lines
7.1 KiB
Bash
Executable file
209 lines
7.1 KiB
Bash
Executable file
#!/usr/bin/env bash
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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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}
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usage() {
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echo "Usage: $scriptName <attr> <version> [<new-source-hash>] [<new-source-url>]"
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echo " [--version-key=<version-key>] [--system=<system>] [--file=<file-to-update>]"
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echo " [--ignore-same-hash] [--print-changes]"
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}
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args=()
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for arg in "$@"; do
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case $arg in
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--system=*)
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systemArg="--system ${arg#*=}"
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;;
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--version-key=*)
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versionKey="${arg#*=}"
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;;
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--file=*)
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nixFile="${arg#*=}"
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if [[ ! -f "$nixFile" ]]; then
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die "Could not find provided file $nixFile"
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fi
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;;
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--ignore-same-hash)
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ignoreSameHash="true"
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;;
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--print-changes)
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printChanges="true"
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;;
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--help)
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usage
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exit 0
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;;
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--*)
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echo "$scriptName: Unknown argument: $arg"
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usage
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exit 1
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;;
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*)
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args["${#args[*]}"]=$arg
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;;
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esac
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done
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attr=${args[0]}
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newVersion=${args[1]}
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newHash=${args[2]}
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newUrl=${args[3]}
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if (( "${#args[*]}" < 2 )); then
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echo "$scriptName: Too few arguments"
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usage
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exit 1
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fi
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if (( "${#args[*]}" > 4 )); then
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echo "$scriptName: Too many arguments"
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usage
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exit 1
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fi
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if [[ -z "$versionKey" ]]; then
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versionKey=version
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fi
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if [[ -z "$nixFile" ]]; then
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nixFile=$(nix-instantiate $systemArg --eval --strict -A "$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 '$attr.meta.position' to locate the .nix file!"
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fi
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fi
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oldHashAlgo=$(nix-instantiate $systemArg --eval --strict -A "$attr.src.drvAttrs.outputHashAlgo" | tr -d '"')
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oldHash=$(nix-instantiate $systemArg --eval --strict -A "$attr.src.drvAttrs.outputHash" | tr -d '"')
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if [[ -z "$oldHashAlgo" || -z "$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 [[ $(grep --count "$oldHash" "$nixFile") != 1 ]]; then
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die "Couldn't locate old source hash '$oldHash' (or it appeared more than once) in '$nixFile'!"
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fi
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oldUrl=$(nix-instantiate $systemArg --eval -E "with import ./. {}; builtins.elemAt ($attr.src.drvAttrs.urls or [ $attr.src.url ]) 0" | tr -d '"')
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if [[ -z "$oldUrl" ]]; then
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die "Couldn't evaluate source url from '$attr.src'!"
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fi
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drvName=$(nix-instantiate $systemArg --eval -E "with import ./. {}; lib.getName $attr" | tr -d '"')
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oldVersion=$(nix-instantiate $systemArg --eval -E "with import ./. {}; $attr.${versionKey} or (lib.getVersion $attr)" | tr -d '"')
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if [[ -z "$drvName" || -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 "$scriptName: New version same as old version, nothing to do." >&2
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if [ -n "$printChanges" ]; then
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printf '[]\n'
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fi
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exit 0
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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')
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oldUrlEscaped=$(echo "$oldUrl" | sed -re 's|[${}.+]|\\&|g')
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if [[ $(grep --count --extended-regexp "^\s*(let\b)?\s*$versionKey\s*=\s*\"$oldVersionEscaped\"" "$nixFile") = 1 ]]; then
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pattern="/\b$versionKey\b\s*=/ s|\"$oldVersionEscaped\"|\"$newVersion\"|"
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elif [[ $(grep --count --extended-regexp "^\s*(let\b)?\s*name\s*=\s*\"[^\"]+-$oldVersionEscaped\"" "$nixFile") = 1 ]]; then
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pattern="/\bname\b\s*=/ s|-$oldVersionEscaped\"|-$newVersion\"|"
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else
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die "Couldn't figure out where out where to patch in new version in '$attr'!"
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fi
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if [[ "$oldHash" =~ ^(sha256|sha512)[:-] ]]; then
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# Handle the possible SRI-style hash attribute (in the form ${type}${separator}${hash})
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# True SRI uses dash as a separator and only supports base64, whereas Nix’s SRI-style format uses a colon and supports all the same encodings like regular hashes (16/32/64).
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# To keep this program reasonably simple, we will upgrade Nix’s format to SRI.
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oldHashAlgo="${BASH_REMATCH[1]}"
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sri=true
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elif [[ "$oldHashAlgo" = "null" ]]; then
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# Some fetcher functions support SRI-style `hash` attribute in addition to legacy type-specific attributes. When `hash` is used `outputHashAlgo` is null so let’s complain when SRI-style hash value was not detected.
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die "Unable to figure out hashing scheme from '$oldHash' in '$attr'!"
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fi
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case "$oldHashAlgo" in
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# Lengths of hex-encoded hashes
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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' "$hashLength" 0)
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if [[ -n "$sri" ]]; then
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# SRI hashes only support base64
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# SRI hashes need to declare the hash type as part of the hash
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tempHash="$(nix to-sri --type "$oldHashAlgo" "$tempHash")"
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fi
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# Escape regex metacharacter that are allowed in hashes (+)
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oldHashEscaped=$(echo "$oldHash" | sed -re 's|[+]|\\&|g')
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tempHashEscaped=$(echo "$tempHash" | sed -re 's|[+]|\\&|g')
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# Replace new version
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sed -i.bak "$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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# Replace new URL
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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
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die "Failed to replace source URL '$oldUrl' to '$newUrl' in '$attr'!"
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fi
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fi
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sed -i "$nixFile" -re "s|\"$oldHashEscaped\"|\"$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 $systemArg --no-out-link -A "$attr.src" 2>"$attr.fetchlog" >/dev/null || true
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# FIXME: use nix-build --hash here once https://github.com/NixOS/nix/issues/1172 is fixed
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newHash=$(sed '1,/hash mismatch in fixed-output derivation/d' "$attr.fetchlog" | grep --perl-regexp --only-matching 'got: +.+[:-]\K.+')
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if [[ -n "$sri" ]]; then
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# nix-build preserves the hashing scheme so we can just convert the result to SRI using the old type
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newHash="$(nix to-sri --type "$oldHashAlgo" "$newHash")"
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fi
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fi
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if [[ -z "$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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if [[ -z "${ignoreSameHash}" && "$oldVersion" != "$newVersion" && "$oldHash" = "$newHash" ]]; then
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mv "$nixFile.bak" "$nixFile"
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die "Both the old and new source hashes of '$attr.src' were equivalent. Please fix the package's source URL to be dependent on '\${version}'!"
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fi
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sed -i "$nixFile" -re "s|\"$tempHashEscaped\"|\"$newHash\"|"
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if cmp -s "$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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if [ -n "$printChanges" ]; then
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printf '[{"attrPath":"%s","oldVersion":"%s","newVersion":"%s","files":["%s"]}]\n' "$attr" "$oldVersion" "$newVersion" "$nixFile"
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fi
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