depot/third_party/nixpkgs/pkgs/stdenv/generic/setup.sh
Default email 88abffb7d2 Project import generated by Copybara.
GitOrigin-RevId: bc9b956714ed6eac5f8888322aac5bc41389defa
2021-09-18 12:52:07 +02:00

1348 lines
39 KiB
Bash
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

set -eu
set -o pipefail
if [ -n "${BASH_VERSINFO-}" ] && [ "${BASH_VERSINFO-}" -lt 4 ]; then
echo "Detected Bash version that isn't supported by Nixpkgs (${BASH_VERSION})"
echo "Please install Bash 4 or greater to continue."
exit 1
fi
if (( "${NIX_DEBUG:-0}" >= 6 )); then
set -x
fi
: ${outputs:=out}
######################################################################
# 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.
# Obsolete.
stopNest() { true; }
header() { echo "$1"; }
closeNest() { true; }
# 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
times > "$NIX_BUILD_TOP/.times"
local -a times=($(cat "$NIX_BUILD_TOP/.times"))
# Print the following statistics:
# - user time for the shell
# - system time for the shell
# - user time for all child processes
# - system time for all child processes
echo "build time elapsed: " "${times[@]}"
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
exit "$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 ":" "$@"
}
# 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 "$fd" magic
exec {fd}<&-
# https://opensource.apple.com/source/lldb/lldb-310.2.36/examples/python/mach_o.py.auto.html
if [[ "$magic" = $'\xfe\xed\xfa\xcf' || "$magic" = $'\xcf\xfa\xed\xfe' ]]; then
# MH_MAGIC_64 || MH_CIGAM_64
return 0;
elif [[ "$magic" = $'\xfe\xed\xfa\xce' || "$magic" = $'\xce\xfa\xed\xfe' ]]; then
# MH_MAGIC || MH_CIGAM
return 0;
elif [[ "$magic" = $'\xca\xfe\xba\xbe' || "$magic" = $'\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.
# 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
# shellcheck disable=SC2034
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)
# 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 -ri hostOffset="$2"
local -ri 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
local -i mapOffsetResult
function mapOffset() {
local -ri inputOffset="$1"
if (( "$inputOffset" <= 0 )); then
local -ri outputOffset="$inputOffset + $hostOffset"
else
local -ri outputOffset="$inputOffset - 1 + $targetOffset"
fi
mapOffsetResult="$outputOffset"
}
# Host offset relative to that of the package whose immediate
# dependencies we are currently exploring.
local -i relHostOffset
for relHostOffset in "${allPlatOffsets[@]}"; do
# `+ 1` so we start at 0 for valid index
local files="${propagatedDepFilesVars[$relHostOffset + 1]}"
# Host offset relative to the package currently being
# built---as absolute an offset as will be used.
mapOffset relHostOffset
local -i hostOffsetNext="$mapOffsetResult"
# Ensure we're in bounds relative to the package currently
# being built.
[[ "${allPlatOffsets[*]}" = *"$hostOffsetNext"* ]] || continue
# Target offset relative to the *host* offset of the package
# whose immediate dependencies we are currently exploring.
local -i 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.
mapOffset relTargetOffset
local -i targetOffsetNext="$mapOffsetResult"
# Once again, ensure we're in bounds relative to the
# package currently being built.
[[ "${allPlatOffsets[*]}" = *"$targetOffsetNext"* ]] || continue
[[ -f "$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
}
# 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 -ri hostOffset="$2"
local -ri 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 [[ "$hostOffset" -le -1 ]]; then
addToSearchPath _XDG_DATA_DIRS "$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 "$pkg/nix-support/setup-hook"
fi
}
_activatePkgs() {
local -i hostOffset targetOffset
local pkg
for hostOffset in "${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" "$targetOffset"
done
done
done
}
# Run the package setup hooks and build _PATH
_activatePkgs
# Set the relevant environment variables to point to the build inputs
# found above.
#
# These `depOffset`s, beyond indexing the arrays, also tell the env
# hook what sort of dependency (ignoring propagatedness) is being
# passed to the env hook. In a real language, we'd append a closure
# with this information to the relevant env hook array, but bash
# doesn't have closures, so it's easier to just pass this in.
_addToEnv() {
local -i depHostOffset depTargetOffset
local pkg
for depHostOffset in "${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 \
${pkgsBuildBuild+"${pkgsBuildBuild[@]}"} \
${pkgsBuildHost+"${pkgsBuildHost[@]}"} \
${pkgsBuildTarget+"${pkgsBuildTarget[@]}"} \
${pkgsHostHost+"${pkgsHostHost[@]}"} \
${pkgsHostTarget+"${pkgsHostTarget[@]}"} \
${pkgsTargetTarget+"${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: $XDG_DATA_DIRS"
fi
unset _PATH
unset _HOST_PATH
unset _XDG_DATA_DIRS
# Make GNU Make produce nested output.
export NIX_INDENT_MAKE=1
# Normalize the NIX_BUILD_CORES variable. The value might be 0, which
# means that we're supposed to try and auto-detect the number of
# available CPU cores at run-time.
if [ -z "${NIX_BUILD_CORES:-}" ]; then
NIX_BUILD_CORES="1"
elif [ "$NIX_BUILD_CORES" -le 0 ]; then
NIX_BUILD_CORES=$(nproc 2>/dev/null || true)
if expr >/dev/null 2>&1 "$NIX_BUILD_CORES" : "^[0-9][0-9]*$"; then
:
else
NIX_BUILD_CORES="1"
fi
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}"
}
consumeEntire() {
# read returns non-0 on EOF, so we want read to fail
if IFS='' read -r -N 0 $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 fileName="$1"
shift
substitute "$fileName" "$fileName" "$@"
}
_allFlags() {
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 < "$fn" | tar xf -
;;
*.tar | *.tar.* | *.tgz | *.tbz2 | *.tbz)
# GNU tar can automatically select the decompression method
# (info "(tar) gzip").
tar xf "$fn"
;;
*)
return 1
;;
esac
fi
}
unpackFile() {
curSrc="$1"
header "unpacking source archive $curSrc" 3
if ! runOneHook unpackCmd "$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
# 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 $srcs; do
unpackFile "$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
for i in ${patches:-}; do
header "applying patch $i" 3
local uncompress=cat
case "$i" in
*.gz)
uncompress="gzip -d"
;;
*.bz2)
uncompress="bzip2 -d"
;;
*.xz)
uncompress="xz -d"
;;
*.lzma)
uncompress="lzma -d"
;;
esac
# "2>&1" is a hack to make patch fail if the decompressor fails (nonexistent patch, etc.)
# shellcheck disable=SC2086
$uncompress < "$i" 2>&1 | patch ${patchFlags:--p1}
done
runHook postPatch
}
fixLibtool() {
sed -i -e 's^eval sys_lib_.*search_path=.*^^' "$1"
}
configurePhase() {
runHook preConfigure
# set to empty if unset
: ${configureScript=}
: ${configureFlags=}
if [[ -z "$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
fi
if [[ -z "${dontAddPrefix:-}" && -n "$prefix" ]]; then
configureFlags="${prefixKey:---prefix=}$prefix $configureFlags"
fi
# Add --disable-dependency-tracking to speed up some builds.
if [ -z "${dontAddDisableDepTrack:-}" ]; then
if [ -f "$configureScript" ] && grep -q dependency-tracking "$configureScript"; then
configureFlags="--disable-dependency-tracking $configureFlags"
fi
fi
# By default, disable static builds.
if [ -z "${dontDisableStatic:-}" ]; then
if [ -f "$configureScript" ] && grep -q enable-static "$configureScript"; then
configureFlags="--disable-static $configureFlags"
fi
fi
if [ -n "$configureScript" ]; then
# Old bash empty array hack
# shellcheck disable=SC2086
local flagsArray=(
$configureFlags ${configureFlagsArray+"${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
# set to empty if unset
: ${makeFlags=}
if [[ -z "$makeFlags" && -z "${makefile:-}" && ! ( -e Makefile || -e makefile || -e GNUmakefile ) ]]; then
echo "no Makefile, doing nothing"
else
foundMakefile=1
# Old bash empty array hack
# shellcheck disable=SC2086
local flagsArray=(
${enableParallelBuilding:+-j${NIX_BUILD_CORES} -l${NIX_BUILD_CORES}}
SHELL=$SHELL
$makeFlags ${makeFlagsArray+"${makeFlagsArray[@]}"}
$buildFlags ${buildFlagsArray+"${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} -l${NIX_BUILD_CORES}}
SHELL=$SHELL
$makeFlags ${makeFlagsArray+"${makeFlagsArray[@]}"}
${checkFlags:-VERBOSE=y} ${checkFlagsArray+"${checkFlagsArray[@]}"}
${checkTarget}
)
echoCmd 'check flags' "${flagsArray[@]}"
make ${makefile:+-f $makefile} "${flagsArray[@]}"
unset flagsArray
fi
runHook postCheck
}
installPhase() {
runHook preInstall
if [ -n "$prefix" ]; then
mkdir -p "$prefix"
fi
# Old bash empty array hack
# shellcheck disable=SC2086
local flagsArray=(
SHELL=$SHELL
$makeFlags ${makeFlagsArray+"${makeFlagsArray[@]}"}
$installFlags ${installFlagsArray+"${installFlagsArray[@]}"}
${installTargets:-install}
)
echoCmd 'install flags' "${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 $outputs; do
if [ -e "${!output}" ]; then chmod -R u+w "${!output}"; fi
done
runHook preFixup
# Apply fixup to each output.
local output
for output in $outputs; do
prefix="${!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
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} -l${NIX_BUILD_CORES}}
SHELL=$SHELL
$makeFlags ${makeFlagsArray+"${makeFlagsArray[@]}"}
$installCheckFlags ${installCheckFlagsArray+"${installCheckFlagsArray[@]}"}
${installCheckTarget:-installcheck}
)
echoCmd 'installcheck flags' "${flagsArray[@]}"
make ${makefile:+-f $makefile} "${flagsArray[@]}"
unset flagsArray
fi
runHook postInstallCheck
}
distPhase() {
runHook preDist
# Old bash empty array hack
# shellcheck disable=SC2086
local flagsArray=(
$distFlags ${distFlagsArray+"${distFlagsArray[@]}"} ${distTarget:-dist}
)
echo 'dist flags: %q' "${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) header "unpacking sources";;
patchPhase) header "patching sources";;
configurePhase) header "configuring";;
buildPhase) header "building";;
checkPhase) header "running tests";;
installPhase) header "installing";;
fixupPhase) header "post-installation fixup";;
installCheckPhase) header "running install tests";;
*) header "$phase";;
esac
}
genericBuild() {
if [ -f "${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
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
# Evaluate the variable named $curPhase if it exists, otherwise the
# function named $curPhase.
eval "${!curPhase:-$curPhase}"
if [ "$curPhase" = unpackPhase ]; then
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
# Disable nounset for nix-shell.
set +u