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# shellcheck shell=bash
# shellcheck disable=1090,2154,2123,2034,2178,2048,2068,1091
__nixpkgs_setup_set_original=$-
set -eu
set -o pipefail
if [[ -n "${BASH_VERSINFO-}" && "${BASH_VERSINFO-}" -lt 4 ]]; then
echo "Detected Bash version that isn't supported by Nixpkgs (${BASH_VERSION})"
echo "Please install Bash 4 or greater to continue."
exit 1
fi
shopt -s inherit_errexit
if (( "${NIX_DEBUG:-0}" >= 6 )); then
set -x
fi
if [ -f .attrs.sh ]; then
__structuredAttrs=1
echo "structuredAttrs is enabled"
else
__structuredAttrs=
fi
if [ -n "$__structuredAttrs" ]; then
for outputName in "${!outputs[@]}"; do
# ex: out=/nix/store/...
export "$outputName=${outputs[$outputName]}"
done
# $NIX_ATTRS_JSON_FILE points to the wrong location in sandbox
# https://github.com/NixOS/nix/issues/6736
export NIX_ATTRS_JSON_FILE="$NIX_BUILD_TOP/.attrs.json"
export NIX_ATTRS_SH_FILE="$NIX_BUILD_TOP/.attrs.sh"
else
: "${outputs:=out}"
fi
getAllOutputNames() {
if [ -n "$__structuredAttrs" ]; then
echo "${!outputs[*]}"
else
echo "$outputs"
fi
}
######################################################################
# Hook handling.
# Run all hooks with the specified name in the order in which they
# were added, stopping if any fails (returns a non-zero exit
# code). The hooks for <hookName> are the shell function or variable
# <hookName>, and the values of the shell array ‘<hookName>Hooks’.
runHook() {
local hookName="$1"
shift
local hooksSlice="${hookName%Hook}Hooks[@]"
local hook
# Hack around old bash being bad and thinking empty arrays are
# undefined.
for hook in "_callImplicitHook 0 $hookName" ${!hooksSlice+"${!hooksSlice}"}; do
_eval "$hook" "$@"
done
return 0
}
# Run all hooks with the specified name, until one succeeds (returns a
# zero exit code). If none succeed, return a non-zero exit code.
runOneHook() {
local hookName="$1"
shift
local hooksSlice="${hookName%Hook}Hooks[@]"
local hook ret=1
# Hack around old bash like above
for hook in "_callImplicitHook 1 $hookName" ${!hooksSlice+"${!hooksSlice}"}; do
if _eval "$hook" "$@"; then
ret=0
break
fi
done
return "$ret"
}
# Run the named hook, either by calling the function with that name or
# by evaluating the variable with that name. This allows convenient
# setting of hooks both from Nix expressions (as attributes /
# environment variables) and from shell scripts (as functions). If you
# want to allow multiple hooks, use runHook instead.
_callImplicitHook() {
local def="$1"
local hookName="$2"
if declare -F "$hookName" > /dev/null; then
"$hookName"
elif type -p "$hookName" > /dev/null; then
source "$hookName"
elif [ -n "${!hookName:-}" ]; then
eval "${!hookName}"
else
return "$def"
fi
# `_eval` expects hook to need nounset disable and leave it
# disabled anyways, so Ok to to delegate. The alternative of a
# return trap is no good because it would affect nested returns.
}
# A function wrapper around ‘eval’ that ensures that ‘return’ inside
# hooks exits the hook, not the caller. Also will only pass args if
# command can take them
_eval() {
if declare -F "$1" > /dev/null 2>&1; then
"$@" # including args
else
eval "$1"
fi
}
######################################################################
# Logging.
# Prints a command such that all word splits are unambiguous. We need
# to split the command in three parts because the middle format string
# will be, and must be, repeated for each argument. The first argument
# goes before the ':' and is just for convenience.
echoCmd() {
printf "%s:" "$1"
shift
printf ' %q' "$@"
echo
}
######################################################################
# Error handling.
exitHandler() {
exitCode="$?"
set +e
if [ -n "${showBuildStats:-}" ]; then
read -r -d '' -a buildTimes < <(times)
echo "build times:"
echo "user time for the shell ${buildTimes[0]}"
echo "system time for the shell ${buildTimes[1]}"
echo "user time for all child processes ${buildTimes[2]}"
echo "system time for all child processes ${buildTimes[3]}"
fi
if (( "$exitCode" != 0 )); then
runHook failureHook
# If the builder had a non-zero exit code and
# $succeedOnFailure is set, create the file
# ‘$out/nix-support/failed’ to signal failure, and exit
# normally. Otherwise, return the original exit code.
if [ -n "${succeedOnFailure:-}" ]; then
echo "build failed with exit code $exitCode (ignored)"
mkdir -p "$out/nix-support"
printf "%s" "$exitCode" > "$out/nix-support/failed"
exit 0
fi
else
runHook exitHook
fi
return "$exitCode"
}
trap "exitHandler" EXIT
######################################################################
# Helper functions.
addToSearchPathWithCustomDelimiter() {
local delimiter="$1"
local varName="$2"
local dir="$3"
if [[ -d "$dir" && "${!varName:+${delimiter}${!varName}${delimiter}}" \
!= *"${delimiter}${dir}${delimiter}"* ]]; then
export "${varName}=${!varName:+${!varName}${delimiter}}${dir}"
fi
}
addToSearchPath() {
addToSearchPathWithCustomDelimiter ":" "$@"
}
# Prepend elements to variable "$1", which may come from an attr.
#
# This is useful in generic setup code, which must (for now) support
# both derivations with and without __structuredAttrs true, so the
# variable may be an array or a space-separated string.
#
# Expressions for individual packages should simply switch to array
# syntax when they switch to setting __structuredAttrs = true.
prependToVar() {
local -n nameref="$1"
local useArray type
if [ -n "$__structuredAttrs" ]; then
useArray=true
else
useArray=false
fi
# check if variable already exist and if it does then do extra checks
if declare -p "$1" 2> /dev/null | grep -q '^'; then
type="$(declare -p "$1")"
if [[ "$type" =~ "declare -A" ]]; then
echo "prependToVar(): ERROR: trying to use prependToVar on an associative array." >&2
return 1
elif [[ "$type" =~ "declare -a" ]]; then
useArray=true
else
useArray=false
fi
fi
shift
if $useArray; then
nameref=( "$@" ${nameref+"${nameref[@]}"} )
else
nameref="$* ${nameref-}"
fi
}
# Same as above
appendToVar() {
local -n nameref="$1"
local useArray type
if [ -n "$__structuredAttrs" ]; then
useArray=true
else
useArray=false
fi
# check if variable already exist and if it does then do extra checks
if declare -p "$1" 2> /dev/null | grep -q '^'; then
type="$(declare -p "$1")"
if [[ "$type" =~ "declare -A" ]]; then
echo "appendToVar(): ERROR: trying to use appendToVar on an associative array, use variable+=([\"X\"]=\"Y\") instead." >&2
return 1
elif [[ "$type" =~ "declare -a" ]]; then
useArray=true
else
useArray=false
fi
fi
shift
if $useArray; then
nameref=( ${nameref+"${nameref[@]}"} "$@" )
else
nameref="${nameref-} $*"
fi
}
# Accumulate into `flagsArray` the flags from the named variables.
#
# If __structuredAttrs, the variables are all treated as arrays
# and simply concatenated onto `flagsArray`.
#
# If not __structuredAttrs, then:
# * Each variable is treated as a string, and split on whitespace;
# * except variables whose names end in "Array", which are treated
# as arrays.
_accumFlagsArray() {
local name
if [ -n "$__structuredAttrs" ]; then
for name in "$@"; do
local -n nameref="$name"
flagsArray+=( ${nameref+"${nameref[@]}"} )
done
else
for name in "$@"; do
local -n nameref="$name"
case "$name" in
*Array)
flagsArray+=( ${nameref+"${nameref[@]}"} ) ;;
*)
flagsArray+=( ${nameref-} ) ;;
esac
done
fi
}
# Add $1/lib* into rpaths.
# The function is used in multiple-outputs.sh hook,
# so it is defined here but tried after the hook.
_addRpathPrefix() {
if [ "${NIX_NO_SELF_RPATH:-0}" != 1 ]; then
export NIX_LDFLAGS="-rpath $1/lib ${NIX_LDFLAGS-}"
if [ -n "${NIX_LIB64_IN_SELF_RPATH:-}" ]; then
export NIX_LDFLAGS="-rpath $1/lib64 ${NIX_LDFLAGS-}"
fi
if [ -n "${NIX_LIB32_IN_SELF_RPATH:-}" ]; then
export NIX_LDFLAGS="-rpath $1/lib32 ${NIX_LDFLAGS-}"
fi
fi
}
# Return success if the specified file is an ELF object.
isELF() {
local fn="$1"
local fd
local magic
exec {fd}< "$fn"
read -r -n 4 -u "$fd" magic
exec {fd}<&-
if [ "$magic" = $'\177ELF' ]; then return 0; else return 1; fi
}
# Return success if the specified file is a Mach-O object.
isMachO() {
local fn="$1"
local fd
local magic
exec {fd}< "$fn"
read -r -n 4 -u "$fd" magic
exec {fd}<&-
# nix uses 'declare -F' in get-env.sh to retrieve the loaded functions.
# If we use the $'string' syntax instead of 'echo -ne' then 'declare' will print the raw characters and break nix.
# See https://github.com/NixOS/nixpkgs/pull/138334 and https://github.com/NixOS/nix/issues/5262.
# https://opensource.apple.com/source/lldb/lldb-310.2.36/examples/python/mach_o.py.auto.html
if [[ "$magic" = $(echo -ne "\xfe\xed\xfa\xcf") || "$magic" = $(echo -ne "\xcf\xfa\xed\xfe") ]]; then
# MH_MAGIC_64 || MH_CIGAM_64
return 0;
elif [[ "$magic" = $(echo -ne "\xfe\xed\xfa\xce") || "$magic" = $(echo -ne "\xce\xfa\xed\xfe") ]]; then
# MH_MAGIC || MH_CIGAM
return 0;
elif [[ "$magic" = $(echo -ne "\xca\xfe\xba\xbe") || "$magic" = $(echo -ne "\xbe\xba\xfe\xca") ]]; then
# FAT_MAGIC || FAT_CIGAM
return 0;
else
return 1;
fi
}
# Return success if the specified file is a script (i.e. starts with
# "#!").
isScript() {
local fn="$1"
local fd
local magic
exec {fd}< "$fn"
read -r -n 2 -u "$fd" magic
exec {fd}<&-
if [[ "$magic" =~ \#! ]]; then return 0; else return 1; fi
}
# printf unfortunately will print a trailing newline regardless
printLines() {
(( "$#" > 0 )) || return 0
printf '%s\n' "$@"
}
printWords() {
(( "$#" > 0 )) || return 0
printf '%s ' "$@"
}
######################################################################
# Initialisation.
# If using structured attributes, export variables from `env` to the environment.
# When not using structured attributes, those variables are already exported.
if [[ -n $__structuredAttrs ]]; then
for envVar in "${!env[@]}"; do
declare -x "${envVar}=${env[${envVar}]}"
done
fi
# Set a fallback default value for SOURCE_DATE_EPOCH, used by some build tools
# to provide a deterministic substitute for the "current" time. Note that
# 315532800 = 1980-01-01 12:00:00. We use this date because python's wheel
# implementation uses zip archive and zip does not support dates going back to
# 1970.
export SOURCE_DATE_EPOCH
: "${SOURCE_DATE_EPOCH:=315532800}"
# Wildcard expansions that don't match should expand to an empty list.
# This ensures that, for instance, "for i in *; do ...; done" does the
# right thing.
shopt -s nullglob
# Set up the initial path.
PATH=
HOST_PATH=
for i in $initialPath; do
if [ "$i" = / ]; then i=; fi
addToSearchPath PATH "$i/bin"
# For backward compatibility, we add initial path to HOST_PATH so
# it can be used in auto patch-shebangs. Unfortunately this will
# not work with cross compilation.
if [ -z "${strictDeps-}" ]; then
addToSearchPath HOST_PATH "$i/bin"
fi
done
unset i
if (( "${NIX_DEBUG:-0}" >= 1 )); then
echo "initial path: $PATH"
fi
# Check that the pre-hook initialised SHELL.
if [ -z "${SHELL:-}" ]; then echo "SHELL not set"; exit 1; fi
BASH="$SHELL"
export CONFIG_SHELL="$SHELL"
# Execute the pre-hook.
if [ -z "${shell:-}" ]; then export shell="$SHELL"; fi
runHook preHook
# Allow the caller to augment buildInputs (it's not always possible to
# do this before the call to setup.sh, since the PATH is empty at that
# point; here we have a basic Unix environment).
runHook addInputsHook
# Package accumulators
declare -a pkgsBuildBuild pkgsBuildHost pkgsBuildTarget
declare -a pkgsHostHost pkgsHostTarget
declare -a pkgsTargetTarget
declare -a pkgBuildAccumVars=(pkgsBuildBuild pkgsBuildHost pkgsBuildTarget)
declare -a pkgHostAccumVars=(pkgsHostHost pkgsHostTarget)
declare -a pkgTargetAccumVars=(pkgsTargetTarget)
declare -a pkgAccumVarVars=(pkgBuildAccumVars pkgHostAccumVars pkgTargetAccumVars)
# Hooks
declare -a envBuildBuildHooks envBuildHostHooks envBuildTargetHooks
declare -a envHostHostHooks envHostTargetHooks
declare -a envTargetTargetHooks
declare -a pkgBuildHookVars=(envBuildBuildHook envBuildHostHook envBuildTargetHook)
declare -a pkgHostHookVars=(envHostHostHook envHostTargetHook)
declare -a pkgTargetHookVars=(envTargetTargetHook)
declare -a pkgHookVarVars=(pkgBuildHookVars pkgHostHookVars pkgTargetHookVars)
# those variables are declared here, since where and if they are used varies
declare -a preFixupHooks fixupOutputHooks preConfigureHooks postFixupHooks postUnpackHooks unpackCmdHooks
# Add env hooks for all sorts of deps with the specified host offset.
addEnvHooks() {
local depHostOffset="$1"
shift
local pkgHookVarsSlice="${pkgHookVarVars[$depHostOffset + 1]}[@]"
local pkgHookVar
for pkgHookVar in "${!pkgHookVarsSlice}"; do
eval "${pkgHookVar}s"'+=("$@")'
done
}
# Propagated dep files
declare -a propagatedBuildDepFiles=(
propagated-build-build-deps
propagated-native-build-inputs # Legacy name for back-compat
propagated-build-target-deps
)
declare -a propagatedHostDepFiles=(
propagated-host-host-deps
propagated-build-inputs # Legacy name for back-compat
)
declare -a propagatedTargetDepFiles=(
propagated-target-target-deps
)
declare -a propagatedDepFilesVars=(
propagatedBuildDepFiles
propagatedHostDepFiles
propagatedTargetDepFiles
)
# Platform offsets: build = -1, host = 0, target = 1
declare -a allPlatOffsets=(-1 0 1)
# Mutually-recursively find all build inputs. See the dependency section of the
# stdenv chapter of the Nixpkgs manual for the specification this algorithm
# implements.
findInputs() {
local -r pkg="$1"
local -r hostOffset="$2"
local -r targetOffset="$3"
# Sanity check
(( hostOffset <= targetOffset )) || exit 1
local varVar="${pkgAccumVarVars[hostOffset + 1]}"
local varRef="$varVar[$((targetOffset - hostOffset))]"
local var="${!varRef}"
unset -v varVar varRef
# TODO(@Ericson2314): Restore using associative array once Darwin
# nix-shell doesn't use impure bash. This should replace the O(n)
# case with an O(1) hash map lookup, assuming bash is implemented
# well :D.
local varSlice="$var[*]"
# ${..-} to hack around old bash empty array problem
case "${!varSlice-}" in
*" $pkg "*) return 0 ;;
esac
unset -v varSlice
eval "$var"'+=("$pkg")'
if ! [ -e "$pkg" ]; then
echo "build input $pkg does not exist" >&2
exit 1
fi
# The current package's host and target offset together
# provide a <=-preserving homomorphism from the relative
# offsets to current offset
function mapOffset() {
local -r inputOffset="$1"
local -n outputOffset="$2"
if (( inputOffset <= 0 )); then
outputOffset=$((inputOffset + hostOffset))
else
outputOffset=$((inputOffset - 1 + targetOffset))
fi
}
# Host offset relative to that of the package whose immediate
# dependencies we are currently exploring.
local relHostOffset
for relHostOffset in "${allPlatOffsets[@]}"; do
# `+ 1` so we start at 0 for valid index
local files="${propagatedDepFilesVars[relHostOffset + 1]}"
# Host offset relative to the package currently being
# built---as absolute an offset as will be used.
local hostOffsetNext
mapOffset "$relHostOffset" hostOffsetNext
# Ensure we're in bounds relative to the package currently
# being built.
(( -1 <= hostOffsetNext && hostOffsetNext <= 1 )) || continue
# Target offset relative to the *host* offset of the package
# whose immediate dependencies we are currently exploring.
local relTargetOffset
for relTargetOffset in "${allPlatOffsets[@]}"; do
(( "$relHostOffset" <= "$relTargetOffset" )) || continue
local fileRef="${files}[$relTargetOffset - $relHostOffset]"
local file="${!fileRef}"
unset -v fileRef
# Target offset relative to the package currently being
# built.
local targetOffsetNext
mapOffset "$relTargetOffset" targetOffsetNext
# Once again, ensure we're in bounds relative to the
# package currently being built.
(( -1 <= hostOffsetNext && hostOffsetNext <= 1 )) || continue
[[ -f "$pkg/nix-support/$file" ]] || continue
local pkgNext
read -r -d '' pkgNext < "$pkg/nix-support/$file" || true
for pkgNext in $pkgNext; do
findInputs "$pkgNext" "$hostOffsetNext" "$targetOffsetNext"
done
done
done
}
# The way we handle deps* and *Inputs works with structured attrs
# either enabled or disabled. For this it's convenient that the items
# in each list must be store paths, and therefore space-free.
# Make sure all are at least defined as empty
: "${depsBuildBuild=}" "${depsBuildBuildPropagated=}"
: "${nativeBuildInputs=}" "${propagatedNativeBuildInputs=}" "${defaultNativeBuildInputs=}"
: "${depsBuildTarget=}" "${depsBuildTargetPropagated=}"
: "${depsHostHost=}" "${depsHostHostPropagated=}"
: "${buildInputs=}" "${propagatedBuildInputs=}" "${defaultBuildInputs=}"
: "${depsTargetTarget=}" "${depsTargetTargetPropagated=}"
for pkg in ${depsBuildBuild[@]} ${depsBuildBuildPropagated[@]}; do
findInputs "$pkg" -1 -1
done
for pkg in ${nativeBuildInputs[@]} ${propagatedNativeBuildInputs[@]}; do
findInputs "$pkg" -1 0
done
for pkg in ${depsBuildTarget[@]} ${depsBuildTargetPropagated[@]}; do
findInputs "$pkg" -1 1
done
for pkg in ${depsHostHost[@]} ${depsHostHostPropagated[@]}; do
findInputs "$pkg" 0 0
done
for pkg in ${buildInputs[@]} ${propagatedBuildInputs[@]} ; do
findInputs "$pkg" 0 1
done
for pkg in ${depsTargetTarget[@]} ${depsTargetTargetPropagated[@]}; do
findInputs "$pkg" 1 1
done
# Default inputs must be processed last
for pkg in ${defaultNativeBuildInputs[@]}; do
findInputs "$pkg" -1 0
done
for pkg in ${defaultBuildInputs[@]}; do
findInputs "$pkg" 0 1
done
# Add package to the future PATH and run setup hooks
activatePackage() {
local pkg="$1"
local -r hostOffset="$2"
local -r targetOffset="$3"
# Sanity check
(( hostOffset <= targetOffset )) || exit 1
if [ -f "$pkg" ]; then
source "$pkg"
fi
# Only dependencies whose host platform is guaranteed to match the
# build platform are included here. That would be `depsBuild*`,
# and legacy `nativeBuildInputs`, in general. If we aren't cross
# compiling, however, everything can be put on the PATH. To ease
# the transition, we do include everything in that case.
#
# TODO(@Ericson2314): Don't special-case native compilation
if [[ -z "${strictDeps-}" || "$hostOffset" -le -1 ]]; then
addToSearchPath _PATH "$pkg/bin"
fi
if (( hostOffset <= -1 )); then
addToSearchPath _XDG_DATA_DIRS "$pkg/share"
fi
if [[ "$hostOffset" -eq 0 && -d "$pkg/bin" ]]; then
addToSearchPath _HOST_PATH "$pkg/bin"
fi
if [[ -f "$pkg/nix-support/setup-hook" ]]; then
source "$pkg/nix-support/setup-hook"
fi
}
_activatePkgs() {
local hostOffset targetOffset
local pkg
for hostOffset in "${allPlatOffsets[@]}"; do
local pkgsVar="${pkgAccumVarVars[hostOffset + 1]}"
for targetOffset in "${allPlatOffsets[@]}"; do
(( hostOffset <= targetOffset )) || continue
local pkgsRef="${pkgsVar}[$targetOffset - $hostOffset]"
local pkgsSlice="${!pkgsRef}[@]"
for pkg in ${!pkgsSlice+"${!pkgsSlice}"}; do
activatePackage "$pkg" "$hostOffset" "$targetOffset"
done
done
done
}
# Run the package setup hooks and build _PATH
_activatePkgs
# Set the relevant environment variables to point to the build inputs
# found above.
#
# These `depOffset`s, beyond indexing the arrays, also tell the env
# hook what sort of dependency (ignoring propagatedness) is being
# passed to the env hook. In a real language, we'd append a closure
# with this information to the relevant env hook array, but bash
# doesn't have closures, so it's easier to just pass this in.
_addToEnv() {
local depHostOffset depTargetOffset
local pkg
for depHostOffset in "${allPlatOffsets[@]}"; do
local hookVar="${pkgHookVarVars[depHostOffset + 1]}"
local pkgsVar="${pkgAccumVarVars[depHostOffset + 1]}"
for depTargetOffset in "${allPlatOffsets[@]}"; do
(( depHostOffset <= depTargetOffset )) || continue
local hookRef="${hookVar}[$depTargetOffset - $depHostOffset]"
if [[ -z "${strictDeps-}" ]]; then
# Keep track of which packages we have visited before.
local visitedPkgs=""
# Apply environment hooks to all packages during native
# compilation to ease the transition.
#
# TODO(@Ericson2314): Don't special-case native compilation
for pkg in \
"${pkgsBuildBuild[@]}" \
"${pkgsBuildHost[@]}" \
"${pkgsBuildTarget[@]}" \
"${pkgsHostHost[@]}" \
"${pkgsHostTarget[@]}" \
"${pkgsTargetTarget[@]}"
do
if [[ "$visitedPkgs" = *"$pkg"* ]]; then
continue
fi
runHook "${!hookRef}" "$pkg"
visitedPkgs+=" $pkg"
done
else
local pkgsRef="${pkgsVar}[$depTargetOffset - $depHostOffset]"
local pkgsSlice="${!pkgsRef}[@]"
for pkg in ${!pkgsSlice+"${!pkgsSlice}"}; do
runHook "${!hookRef}" "$pkg"
done
fi
done
done
}
# Run the package-specific hooks set by the setup-hook scripts.
_addToEnv
# Unset setup-specific declared variables
unset allPlatOffsets
unset pkgBuildAccumVars pkgHostAccumVars pkgTargetAccumVars pkgAccumVarVars
unset pkgBuildHookVars pkgHostHookVars pkgTargetHookVars pkgHookVarVars
unset propagatedDepFilesVars
_addRpathPrefix "$out"
# Set the TZ (timezone) environment variable, otherwise commands like
# `date' will complain (e.g., `Tue Mar 9 10:01:47 Local time zone must
# be set--see zic manual page 2004').
export TZ=UTC
# Set the prefix. This is generally $out, but it can be overriden,
# for instance if we just want to perform a test build/install to a
# temporary location and write a build report to $out.
if [ -z "${prefix:-}" ]; then
prefix="$out";
fi
if [ "${useTempPrefix:-}" = 1 ]; then
prefix="$NIX_BUILD_TOP/tmp_prefix";
fi
PATH="${_PATH-}${_PATH:+${PATH:+:}}$PATH"
HOST_PATH="${_HOST_PATH-}${_HOST_PATH:+${HOST_PATH:+:}}$HOST_PATH"
export XDG_DATA_DIRS="${_XDG_DATA_DIRS-}${_XDG_DATA_DIRS:+${XDG_DATA_DIRS:+:}}${XDG_DATA_DIRS-}"
if (( "${NIX_DEBUG:-0}" >= 1 )); then
echo "final path: $PATH"
echo "final host path: $HOST_PATH"
echo "final data dirs: $XDG_DATA_DIRS"
fi
unset _PATH
unset _HOST_PATH
unset _XDG_DATA_DIRS
# Normalize the NIX_BUILD_CORES variable. The value might be 0, which
# means that we're supposed to try and auto-detect the number of
# available CPU cores at run-time.
NIX_BUILD_CORES="${NIX_BUILD_CORES:-1}"
if ((NIX_BUILD_CORES <= 0)); then
guess=$(nproc 2>/dev/null || true)
((NIX_BUILD_CORES = guess <= 0 ? 1 : guess))
fi
export NIX_BUILD_CORES
# Prevent SSL libraries from using certificates in /etc/ssl, unless set explicitly.
# Leave it in impure shells for convenience.
if [[ -z "${NIX_SSL_CERT_FILE:-}" && "${IN_NIX_SHELL:-}" != "impure" ]]; then
export NIX_SSL_CERT_FILE=/no-cert-file.crt
fi
# Another variant left for compatibility.
if [[ -z "${SSL_CERT_FILE:-}" && "${IN_NIX_SHELL:-}" != "impure" ]]; then
export SSL_CERT_FILE=/no-cert-file.crt
fi
######################################################################
# Textual substitution functions.
substituteStream() {
local var=$1
local description=$2
shift 2
while (( "$#" )); do
case "$1" in
--replace)
pattern="$2"
replacement="$3"
shift 3
local savedvar
savedvar="${!var}"
eval "$var"'=${'"$var"'//"$pattern"/"$replacement"}'
if [ "$pattern" != "$replacement" ]; then
if [ "${!var}" == "$savedvar" ]; then
echo "substituteStream(): WARNING: pattern '$pattern' doesn't match anything in $description" >&2
fi
fi
;;
--subst-var)
local varName="$2"
shift 2
# check if the used nix attribute name is a valid bash name
if ! [[ "$varName" =~ ^[a-zA-Z_][a-zA-Z0-9_]*$ ]]; then
echo "substituteStream(): ERROR: substitution variables must be valid Bash names, \"$varName\" isn't." >&2
return 1
fi
if [ -z ${!varName+x} ]; then
echo "substituteStream(): ERROR: variable \$$varName is unset" >&2
return 1
fi
pattern="@$varName@"
replacement="${!varName}"
eval "$var"'=${'"$var"'//"$pattern"/"$replacement"}'
;;
--subst-var-by)
pattern="@$2@"
replacement="$3"
eval "$var"'=${'"$var"'//"$pattern"/"$replacement"}'
shift 3
;;
*)
echo "substituteStream(): ERROR: Invalid command line argument: $1" >&2
return 1
;;
esac
done
printf "%s" "${!var}"
}
# put the content of a file in a variable
# fail loudly if provided with a binary (containing null bytes)
consumeEntire() {
# read returns non-0 on EOF, so we want read to fail
if IFS='' read -r -d '' "$1" ; then
echo "consumeEntire(): ERROR: Input null bytes, won't process" >&2
return 1
fi
}
substitute() {
local input="$1"
local output="$2"
shift 2
if [ ! -f "$input" ]; then
echo "substitute(): ERROR: file '$input' does not exist" >&2
return 1
fi
local content
consumeEntire content < "$input"
if [ -e "$output" ]; then chmod +w "$output"; fi
substituteStream content "file '$input'" "$@" > "$output"
}
substituteInPlace() {
local -a fileNames=()
for arg in "$@"; do
if [[ "$arg" = "--"* ]]; then
break
fi
fileNames+=("$arg")
shift
done
for file in "${fileNames[@]}"; do
substitute "$file" "$file" "$@"
done
}
_allFlags() {
# export some local variables for the awk below
# so some substitutions such as name don't have to be in the env attrset
# when __structuredAttrs is enabled
export system pname name version
for varName in $(awk 'BEGIN { for (v in ENVIRON) if (v ~ /^[a-z][a-zA-Z0-9_]*$/) print v }'); do
if (( "${NIX_DEBUG:-0}" >= 1 )); then
printf "@%s@ -> %q\n" "${varName}" "${!varName}"
fi
args+=("--subst-var" "$varName")
done
}
substituteAllStream() {
local -a args=()
_allFlags
substituteStream "$1" "$2" "${args[@]}"
}
# Substitute all environment variables that start with a lowercase character and
# are valid Bash names.
substituteAll() {
local input="$1"
local output="$2"
local -a args=()
_allFlags
substitute "$input" "$output" "${args[@]}"
}
substituteAllInPlace() {
local fileName="$1"
shift
substituteAll "$fileName" "$fileName" "$@"
}
######################################################################
# What follows is the generic builder.
# This function is useful for debugging broken Nix builds. It dumps
# all environment variables to a file `env-vars' in the build
# directory. If the build fails and the `-K' option is used, you can
# then go to the build directory and source in `env-vars' to reproduce
# the environment used for building.
dumpVars() {
if [ "${noDumpEnvVars:-0}" != 1 ]; then
export 2>/dev/null >| "$NIX_BUILD_TOP/env-vars" || true
fi
}
# Utility function: echo the base name of the given path, with the
# prefix `HASH-' removed, if present.
stripHash() {
local strippedName casematchOpt=0
# On separate line for `set -e`
strippedName="$(basename -- "$1")"
shopt -q nocasematch && casematchOpt=1
shopt -u nocasematch
if [[ "$strippedName" =~ ^[a-z0-9]{32}- ]]; then
echo "${strippedName:33}"
else
echo "$strippedName"
fi
if (( casematchOpt )); then shopt -s nocasematch; fi
}
unpackCmdHooks+=(_defaultUnpack)
_defaultUnpack() {
local fn="$1"
if [ -d "$fn" ]; then
# We can't preserve hardlinks because they may have been
# introduced by store optimization, which might break things
# in the build.
cp -pr --reflink=auto -- "$fn" "$(stripHash "$fn")"
else
case "$fn" in
*.tar.xz | *.tar.lzma | *.txz)
# Don't rely on tar knowing about .xz.
xz -d < "$fn" | tar xf - --warning=no-timestamp
;;
*.tar | *.tar.* | *.tgz | *.tbz2 | *.tbz)
# GNU tar can automatically select the decompression method
# (info "(tar) gzip").
tar xf "$fn" --warning=no-timestamp
;;
*)
return 1
;;
esac
fi
}
unpackFile() {
curSrc="$1"
echo "unpacking source archive $curSrc"
if ! runOneHook unpackCmd "$curSrc"; then
echo "do not know how to unpack source archive $curSrc"
exit 1
fi
}
unpackPhase() {
runHook preUnpack
if [ -z "${srcs:-}" ]; then
if [ -z "${src:-}" ]; then
# shellcheck disable=SC2016
echo 'variable $src or $srcs should point to the source'
exit 1
fi
srcs="$src"
fi
local -a srcsArray
if [ -n "$__structuredAttrs" ]; then
srcsArray=( "${srcs[@]}" )
else
srcsArray=( $srcs )
fi
# To determine the source directory created by unpacking the
# source archives, we record the contents of the current
# directory, then look below which directory got added. Yeah,
# it's rather hacky.
local dirsBefore=""
for i in *; do
if [ -d "$i" ]; then
dirsBefore="$dirsBefore $i "
fi
done
# Unpack all source archives.
for i in "${srcsArray[@]}"; do
unpackFile "$i"
done
# Find the source directory.
# set to empty if unset
: "${sourceRoot=}"
if [ -n "${setSourceRoot:-}" ]; then
runOneHook setSourceRoot
elif [ -z "$sourceRoot" ]; then
for i in *; do
if [ -d "$i" ]; then
case $dirsBefore in
*\ $i\ *)
;;
*)
if [ -n "$sourceRoot" ]; then
echo "unpacker produced multiple directories"
exit 1
fi
sourceRoot="$i"
;;
esac
fi
done
fi
if [ -z "$sourceRoot" ]; then
echo "unpacker appears to have produced no directories"
exit 1
fi
echo "source root is $sourceRoot"
# By default, add write permission to the sources. This is often
# necessary when sources have been copied from other store
# locations.
if [ "${dontMakeSourcesWritable:-0}" != 1 ]; then
chmod -R u+w -- "$sourceRoot"
fi
runHook postUnpack
}
patchPhase() {
runHook prePatch
local -a patchesArray
if [ -n "$__structuredAttrs" ]; then
patchesArray=( ${patches:+"${patches[@]}"} )
else
patchesArray=( ${patches:-} )
fi
for i in "${patchesArray[@]}"; do
echo "applying patch $i"
local uncompress=cat
case "$i" in
*.gz)
uncompress="gzip -d"
;;
*.bz2)
uncompress="bzip2 -d"
;;
*.xz)
uncompress="xz -d"
;;
*.lzma)
uncompress="lzma -d"
;;
esac
local -a flagsArray
if [ -n "$__structuredAttrs" ]; then
flagsArray=( "${patchFlags[@]:--p1}" )
else
# shellcheck disable=SC2086
flagsArray=( ${patchFlags:--p1} )
fi
# "2>&1" is a hack to make patch fail if the decompressor fails (nonexistent patch, etc.)
# shellcheck disable=SC2086
$uncompress < "$i" 2>&1 | patch "${flagsArray[@]}"
done
runHook postPatch
}
fixLibtool() {
local search_path
for flag in $NIX_LDFLAGS; do
case $flag in
-L*)
search_path+=" ${flag#-L}"
;;
esac
done
sed -i "$1" \
-e "s^eval \(sys_lib_search_path=\).*^\1'$search_path'^" \
-e 's^eval sys_lib_.+search_path=.*^^'
}
configurePhase() {
runHook preConfigure
# set to empty if unset
: "${configureScript=}"
if [[ -z "$configureScript" && -x ./configure ]]; then
configureScript=./configure
fi
if [ -z "${dontFixLibtool:-}" ]; then
export lt_cv_deplibs_check_method="${lt_cv_deplibs_check_method-pass_all}"
local i
find . -iname "ltmain.sh" -print0 | while IFS='' read -r -d '' i; do
echo "fixing libtool script $i"
fixLibtool "$i"
done
# replace `/usr/bin/file` with `file` in any `configure`
# scripts with vendored libtool code. Preserve mtimes to
# prevent some packages (e.g. libidn2) from spontaneously
# autoreconf'ing themselves
CONFIGURE_MTIME_REFERENCE=$(mktemp configure.mtime.reference.XXXXXX)
find . \
-executable \
-type f \
-name configure \
-exec grep -l 'GNU Libtool is free software; you can redistribute it and/or modify' {} \; \
-exec touch -r {} "$CONFIGURE_MTIME_REFERENCE" \; \
-exec sed -i s_/usr/bin/file_file_g {} \; \
-exec touch -r "$CONFIGURE_MTIME_REFERENCE" {} \;
rm -f "$CONFIGURE_MTIME_REFERENCE"
fi
if [[ -z "${dontAddPrefix:-}" && -n "$prefix" ]]; then
prependToVar configureFlags "${prefixKey:---prefix=}$prefix"
fi
if [[ -f "$configureScript" ]]; then
# Add --disable-dependency-tracking to speed up some builds.
if [ -z "${dontAddDisableDepTrack:-}" ]; then
if grep -q dependency-tracking "$configureScript"; then
prependToVar configureFlags --disable-dependency-tracking
fi
fi
# By default, disable static builds.
if [ -z "${dontDisableStatic:-}" ]; then
if grep -q enable-static "$configureScript"; then
prependToVar configureFlags --disable-static
fi
fi
fi
if [ -n "$configureScript" ]; then
local -a flagsArray
_accumFlagsArray configureFlags configureFlagsArray
echoCmd 'configure flags' "${flagsArray[@]}"
# shellcheck disable=SC2086
$configureScript "${flagsArray[@]}"
unset flagsArray
else
echo "no configure script, doing nothing"
fi
runHook postConfigure
}
buildPhase() {
runHook preBuild
if [[ -z "${makeFlags-}" && -z "${makefile:-}" && ! ( -e Makefile || -e makefile || -e GNUmakefile ) ]]; then
echo "no Makefile or custom buildPhase, doing nothing"
else
foundMakefile=1
# shellcheck disable=SC2086
local flagsArray=(
${enableParallelBuilding:+-j${NIX_BUILD_CORES}}
SHELL=$SHELL
)
_accumFlagsArray makeFlags makeFlagsArray buildFlags buildFlagsArray
echoCmd 'build flags' "${flagsArray[@]}"
make ${makefile:+-f $makefile} "${flagsArray[@]}"
unset flagsArray
fi
runHook postBuild
}
checkPhase() {
runHook preCheck
if [[ -z "${foundMakefile:-}" ]]; then
echo "no Makefile or custom checkPhase, doing nothing"
runHook postCheck
return
fi
if [[ -z "${checkTarget:-}" ]]; then
#TODO(@oxij): should flagsArray influence make -n?
if make -n ${makefile:+-f $makefile} check >/dev/null 2>&1; then
checkTarget=check
elif make -n ${makefile:+-f $makefile} test >/dev/null 2>&1; then
checkTarget=test
fi
fi
if [[ -z "${checkTarget:-}" ]]; then
echo "no check/test target in ${makefile:-Makefile}, doing nothing"
else
# Old bash empty array hack
# shellcheck disable=SC2086
local flagsArray=(
${enableParallelChecking:+-j${NIX_BUILD_CORES}}
SHELL=$SHELL
)
_accumFlagsArray makeFlags makeFlagsArray
if [ -n "$__structuredAttrs" ]; then
flagsArray+=( "${checkFlags[@]:-VERBOSE=y}" )
else
flagsArray+=( ${checkFlags:-VERBOSE=y} )
fi
_accumFlagsArray checkFlagsArray
flagsArray+=( ${checkTarget} )
echoCmd 'check flags' "${flagsArray[@]}"
make ${makefile:+-f $makefile} "${flagsArray[@]}"
unset flagsArray
fi
runHook postCheck
}
installPhase() {
runHook preInstall
# Dont reuse 'foundMakefile' set in buildPhase, a makefile may have been created in buildPhase
if [[ -z "${makeFlags-}" && -z "${makefile:-}" && ! ( -e Makefile || -e makefile || -e GNUmakefile ) ]]; then
echo "no Makefile or custom installPhase, doing nothing"
runHook postInstall
return
else
foundMakefile=1
fi
if [ -n "$prefix" ]; then
mkdir -p "$prefix"
fi
# shellcheck disable=SC2086
local flagsArray=(
SHELL=$SHELL
)
_accumFlagsArray makeFlags makeFlagsArray installFlags installFlagsArray
if [ -n "$__structuredAttrs" ]; then
flagsArray+=( "${installTargets[@]:-install}" )
else
flagsArray+=( ${installTargets:-install} )
fi
echoCmd 'install flags' "${flagsArray[@]}"
make ${makefile:+-f $makefile} "${flagsArray[@]}"
unset flagsArray
runHook postInstall
}
# The fixup phase performs generic, package-independent stuff, like
# stripping binaries, running patchelf and setting
# propagated-build-inputs.
fixupPhase() {
# Make sure everything is writable so "strip" et al. work.
local output
for output in $(getAllOutputNames); do
if [ -e "${!output}" ]; then chmod -R u+w "${!output}"; fi
done
runHook preFixup
# Apply fixup to each output.
local output
for output in $(getAllOutputNames); do
prefix="${!output}" runHook fixupOutput
done
# Propagate dependencies & setup hook into the development output.
declare -ra flatVars=(
# Build
depsBuildBuildPropagated
propagatedNativeBuildInputs
depsBuildTargetPropagated
# Host
depsHostHostPropagated
propagatedBuildInputs
# Target
depsTargetTargetPropagated
)
declare -ra flatFiles=(
"${propagatedBuildDepFiles[@]}"
"${propagatedHostDepFiles[@]}"
"${propagatedTargetDepFiles[@]}"
)
local propagatedInputsIndex
for propagatedInputsIndex in "${!flatVars[@]}"; do
local propagatedInputsSlice="${flatVars[$propagatedInputsIndex]}[@]"
local propagatedInputsFile="${flatFiles[$propagatedInputsIndex]}"
[[ "${!propagatedInputsSlice}" ]] || continue
mkdir -p "${!outputDev}/nix-support"
# shellcheck disable=SC2086
printWords ${!propagatedInputsSlice} > "${!outputDev}/nix-support/$propagatedInputsFile"
done
if [ -n "${setupHook:-}" ]; then
mkdir -p "${!outputDev}/nix-support"
substituteAll "$setupHook" "${!outputDev}/nix-support/setup-hook"
fi
# TODO(@Ericson2314): Remove after https://github.com/NixOS/nixpkgs/pull/31414
if [ -n "${setupHooks:-}" ]; then
mkdir -p "${!outputDev}/nix-support"
local hook
# have to use ${setupHooks[@]} without quotes because it needs to support setupHooks being a array or a whitespace separated string
# # values of setupHooks won't have spaces so it won't cause problems
# shellcheck disable=2068
for hook in ${setupHooks[@]}; do
local content
consumeEntire content < "$hook"
substituteAllStream content "file '$hook'" >> "${!outputDev}/nix-support/setup-hook"
unset -v content
done
unset -v hook
fi
# Propagate user-env packages into the output with binaries, TODO?
if [ -n "${propagatedUserEnvPkgs:-}" ]; then
mkdir -p "${!outputBin}/nix-support"
# shellcheck disable=SC2086
printWords $propagatedUserEnvPkgs > "${!outputBin}/nix-support/propagated-user-env-packages"
fi
runHook postFixup
}
installCheckPhase() {
runHook preInstallCheck
if [[ -z "${foundMakefile:-}" ]]; then
echo "no Makefile or custom installCheckPhase, doing nothing"
#TODO(@oxij): should flagsArray influence make -n?
elif [[ -z "${installCheckTarget:-}" ]] \
&& ! make -n ${makefile:+-f $makefile} "${installCheckTarget:-installcheck}" >/dev/null 2>&1; then
echo "no installcheck target in ${makefile:-Makefile}, doing nothing"
else
# Old bash empty array hack
# shellcheck disable=SC2086
local flagsArray=(
${enableParallelChecking:+-j${NIX_BUILD_CORES}}
SHELL=$SHELL
)
_accumFlagsArray makeFlags makeFlagsArray \
installCheckFlags installCheckFlagsArray
flagsArray+=( ${installCheckTarget:-installcheck} )
echoCmd 'installcheck flags' "${flagsArray[@]}"
make ${makefile:+-f $makefile} "${flagsArray[@]}"
unset flagsArray
fi
runHook postInstallCheck
}
distPhase() {
runHook preDist
local flagsArray=()
_accumFlagsArray distFlags distFlagsArray
flagsArray+=( ${distTarget:-dist} )
echo 'dist flags: %q' "${flagsArray[@]}"
make ${makefile:+-f $makefile} "${flagsArray[@]}"
if [ "${dontCopyDist:-0}" != 1 ]; then
mkdir -p "$out/tarballs"
# Note: don't quote $tarballs, since we explicitly permit
# wildcards in there.
# shellcheck disable=SC2086
cp -pvd ${tarballs[*]:-*.tar.gz} "$out/tarballs"
fi
runHook postDist
}
showPhaseHeader() {
local phase="$1"
case "$phase" in
unpackPhase) echo "unpacking sources";;
patchPhase) echo "patching sources";;
configurePhase) echo "configuring";;
buildPhase) echo "building";;
checkPhase) echo "running tests";;
installPhase) echo "installing";;
fixupPhase) echo "post-installation fixup";;
installCheckPhase) echo "running install tests";;
*) echo "$phase";;
esac
}
showPhaseFooter() {
local phase="$1"
local startTime="$2"
local endTime="$3"
local delta=$(( endTime - startTime ))
(( delta < 30 )) && return
local H=$((delta/3600))
local M=$((delta%3600/60))
local S=$((delta%60))
echo -n "$phase completed in "
(( H > 0 )) && echo -n "$H hours "
(( M > 0 )) && echo -n "$M minutes "
echo "$S seconds"
}
genericBuild() {
# variable used by our gzip wrapper to add -n.
# gzip is in common-path.nix and is added to nix-shell but we only want to change its behaviour in nix builds. do not move to a setupHook in gzip.
export GZIP_NO_TIMESTAMPS=1
if [ -f "${buildCommandPath:-}" ]; then
source "$buildCommandPath"
return
fi
if [ -n "${buildCommand:-}" ]; then
eval "$buildCommand"
return
fi
if [ -z "${phases[*]:-}" ]; then
phases="${prePhases[*]:-} unpackPhase patchPhase ${preConfigurePhases[*]:-} \
configurePhase ${preBuildPhases[*]:-} buildPhase checkPhase \
${preInstallPhases[*]:-} installPhase ${preFixupPhases[*]:-} fixupPhase installCheckPhase \
${preDistPhases[*]:-} distPhase ${postPhases[*]:-}";
fi
# The use of ${phases[*]} gives the correct behavior both with and
# without structured attrs. This relies on the fact that each
# phase name is space-free, which it must be because it's the name
# of either a shell variable or a shell function.
for curPhase in ${phases[*]}; do
if [[ "$curPhase" = unpackPhase && -n "${dontUnpack:-}" ]]; then continue; fi
if [[ "$curPhase" = patchPhase && -n "${dontPatch:-}" ]]; then continue; fi
if [[ "$curPhase" = configurePhase && -n "${dontConfigure:-}" ]]; then continue; fi
if [[ "$curPhase" = buildPhase && -n "${dontBuild:-}" ]]; then continue; fi
if [[ "$curPhase" = checkPhase && -z "${doCheck:-}" ]]; then continue; fi
if [[ "$curPhase" = installPhase && -n "${dontInstall:-}" ]]; then continue; fi
if [[ "$curPhase" = fixupPhase && -n "${dontFixup:-}" ]]; then continue; fi
if [[ "$curPhase" = installCheckPhase && -z "${doInstallCheck:-}" ]]; then continue; fi
if [[ "$curPhase" = distPhase && -z "${doDist:-}" ]]; then continue; fi
if [[ -n $NIX_LOG_FD ]]; then
echo "@nix { \"action\": \"setPhase\", \"phase\": \"$curPhase\" }" >&"$NIX_LOG_FD"
fi
showPhaseHeader "$curPhase"
dumpVars
local startTime=$(date +"%s")
# Evaluate the variable named $curPhase if it exists, otherwise the
# function named $curPhase.
eval "${!curPhase:-$curPhase}"
local endTime=$(date +"%s")
showPhaseFooter "$curPhase" "$startTime" "$endTime"
if [ "$curPhase" = unpackPhase ]; then
# make sure we can cd into the directory
[ -z "${sourceRoot}" ] || chmod +x "${sourceRoot}"
cd "${sourceRoot:-.}"
fi
done
}
# Execute the post-hooks.
runHook postHook
# Execute the global user hook (defined through the Nixpkgs
# configuration option ‘stdenv.userHook’). This can be used to set
# global compiler optimisation flags, for instance.
runHook userHook
dumpVars
# Restore the original options for nix-shell
[[ $__nixpkgs_setup_set_original == *e* ]] || set +e
[[ $__nixpkgs_setup_set_original == *u* ]] || set +u
unset -v __nixpkgs_setup_set_original