set -e set -o pipefail : ${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 are the shell function or variable # , and the values of the shell array ‘Hooks’. runHook() { local hookName="$1" shift local var="$hookName" if [[ "$hookName" =~ Hook$ ]]; then var+=s; else var+=Hooks; fi eval "local -a dummy=(\"\${$var[@]}\")" for hook in "_callImplicitHook 0 $hookName" "${dummy[@]}"; do if ! _eval "$hook" "$@"; then return 1; fi 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="$1" shift local var="$hookName" if [[ "$hookName" =~ Hook$ ]]; then var+=s; else var+=Hooks; fi eval "local -a dummy=(\"\${$var[@]}\")" for hook in "_callImplicitHook 1 $hookName" "${dummy[@]}"; do if _eval "$hook" "$@"; then return 0 fi done return 1 } # 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="$2" case "$(type -t $hookName)" in (function|alias|builtin) $hookName;; (file) source $hookName;; (keyword) :;; (*) if [ -z "${!hookName}" ]; then return "$def"; else eval "${!hookName}"; fi;; esac } # A function wrapper around ‘eval’ that ensures that ‘return’ inside # hooks exits the hook, not the caller. _eval() { local code="$1" shift if [ "$(type -t $code)" = function ]; then eval "$code \"\$@\"" else eval "$code" fi } ###################################################################### # Error handling. exitHandler() { exitCode=$? set +e closeNest 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" ]; then eval export ${varName}=${!varName}${!varName:+$delimiter}${dir} fi } PATH_DELIMITER=':' addToSearchPath() { addToSearchPathWithCustomDelimiter "${PATH_DELIMITER}" "$@" } ensureDir() { echo "warning: ‘ensureDir’ is deprecated; use ‘mkdir’ instead" >&2 local dir for dir in "$@"; do if ! [ -x "$dir" ]; then mkdir -p "$dir"; fi done } # 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" != 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 } ###################################################################### # Initialisation. # 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= for i in $initialPath; do if [ "$i" = / ]; then i=; fi addToSearchPath PATH $i/bin addToSearchPath PATH $i/sbin done if [ "$NIX_DEBUG" = 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 # Recursively find all build inputs. findInputs() { local pkg=$1 local var=$2 local propagatedBuildInputsFile=$3 case ${!var} in *\ $pkg\ *) return 0 ;; esac eval $var="'${!var} $pkg '" if [ -f $pkg ]; then source $pkg fi if [ -f $pkg/nix-support/setup-hook ]; then source $pkg/nix-support/setup-hook fi if [ -f $pkg/nix-support/$propagatedBuildInputsFile ]; then for i in $(cat $pkg/nix-support/$propagatedBuildInputsFile); do findInputs $i $var $propagatedBuildInputsFile done fi } crossPkgs="" for i in $buildInputs $defaultBuildInputs $propagatedBuildInputs; do findInputs $i crossPkgs propagated-build-inputs done nativePkgs="" for i in $nativeBuildInputs $defaultNativeBuildInputs $propagatedNativeBuildInputs; do findInputs $i nativePkgs propagated-native-build-inputs done # Set the relevant environment variables to point to the build inputs # found above. _addToNativeEnv() { local pkg=$1 if [ -d $1/bin ]; then addToSearchPath _PATH $1/bin fi # Run the package-specific hooks set by the setup-hook scripts. runHook envHook "$pkg" } for i in $nativePkgs; do _addToNativeEnv $i done _addToCrossEnv() { local pkg=$1 # Some programs put important build scripts (freetype-config and similar) # into their crossDrv bin path. Intentionally these should go after # the nativePkgs in PATH. if [ -d $1/bin ]; then addToSearchPath _PATH $1/bin fi # Run the package-specific hooks set by the setup-hook scripts. runHook crossEnvHook "$pkg" } for i in $crossPkgs; do _addToCrossEnv $i done _addRpathPrefix "$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 if [ "$NIX_DEBUG" = 1 ]; then echo "final path: $PATH" fi # Make GNU Make produce nested output. export NIX_INDENT_MAKE=1 # Normalize the NIX_BUILD_CORES variable. The value might be 0, which # means that we're supposed to try and auto-detect the number of # available CPU cores at run-time. if [ -z "${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 # Dummy implementation of the paxmark function. On Linux, this is # overwritten by paxctl's setup hook. paxmark() { true; } ###################################################################### # Textual substitution functions. substitute() { local input="$1" local output="$2" local -a params=("$@") local n p pattern replacement varName content # a slightly hacky way to keep newline at the end content="$(cat "$input"; printf "%s" X)" content="${content%X}" for ((n = 2; n < ${#params[*]}; n += 1)); do p=${params[$n]} if [ "$p" = --replace ]; then pattern="${params[$((n + 1))]}" replacement="${params[$((n + 2))]}" n=$((n + 2)) fi if [ "$p" = --subst-var ]; then varName="${params[$((n + 1))]}" pattern="@$varName@" replacement="${!varName}" n=$((n + 1)) fi if [ "$p" = --subst-var-by ]; then pattern="@${params[$((n + 1))]}@" replacement="${params[$((n + 2))]}" n=$((n + 2)) fi content="${content//"$pattern"/$replacement}" done if [ -e "$output" ]; then chmod +w "$output"; fi printf "%s" "$content" > "$output" } substituteInPlace() { local fileName="$1" shift substitute "$fileName" "$fileName" "$@" } substituteAll() { local input="$1" local output="$2" # Select all environment variables that start with a lowercase character. for envVar in $(env | sed -e $'s/^\([a-z][^=]*\)=.*/\\1/; t \n d'); do if [ "$NIX_DEBUG" = "1" ]; then echo "$envVar -> ${!envVar}" fi args="$args --subst-var $envVar" done substitute "$input" "$output" $args } substituteAllInPlace() { local fileName="$1" shift substituteAll "$fileName" "$fileName" "$@" } ###################################################################### # What follows is the generic builder. nestingLevel=0 startNest() { nestingLevel=$(($nestingLevel + 1)) echo -en "\033[$1p" } stopNest() { nestingLevel=$(($nestingLevel - 1)) echo -en "\033[q" } header() { startNest "$2" echo "$1" } # Make sure that even when we exit abnormally, the original nesting # level is properly restored. closeNest() { while [ $nestingLevel -gt 0 ]; do stopNest done } # This function is useful for debugging broken Nix builds. It dumps # all environment variables to a file `env-vars' in the build # directory. If the build fails and the `-K' option is used, you can # then go to the build directory and source in `env-vars' to reproduce # the environment used for building. dumpVars() { if [ "$noDumpEnvVars" != 1 ]; then export > "$NIX_BUILD_TOP/env-vars" fi } # Utility function: return the base name of the given path, with the # prefix `HASH-' removed, if present. stripHash() { strippedName=$(basename $1); if echo "$strippedName" | grep -q '^[a-z0-9]\{32\}-'; then strippedName=$(echo "$strippedName" | cut -c34-) fi } unpackCmdHooks+=(_defaultUnpack) _defaultUnpack() { local fn="$1" if [ -d "$fn" ]; then stripHash "$fn" # We can't preserve hardlinks because they may have been introduced by # store optimization, which might break things in the build cp -pr --reflink=auto --no-preserve=timestamps "$fn" $strippedName else case "$fn" in *.tar.xz | *.tar.lzma) # Don't rely on tar knowing about .xz. xz -d < "$fn" | tar xf - ;; *.tar | *.tar.* | *.tgz | *.tbz2) # GNU tar can automatically select the decompression method # (info "(tar) gzip"). tar xf "$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 $curSrc" exit 1 fi stopNest } unpackPhase() { runHook preUnpack if [ -z "$srcs" ]; then if [ -z "$src" ]; then 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 $i done # Find the source directory. if [ -n "$setSourceRoot" ]; then runOneHook setSourceRoot elif [ -z "$sourceRoot" ]; then sourceRoot= for i in *; do if [ -d "$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" != 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.) $uncompress < "$i" 2>&1 | patch ${patchFlags:--p1} stopNest done runHook postPatch } fixLibtool() { sed -i -e 's^eval sys_lib_.*search_path=.*^^' "$1" } configurePhase() { runHook preConfigure if [ -z "$configureScript" ]; then configureScript=./configure if ! [ -x $configureScript ]; then echo "no configure script, doing nothing" return fi fi if [ -z "$dontFixLibtool" ]; then find . -iname "ltmain.sh" | while read i; do echo "fixing libtool script $i" fixLibtool $i done fi if [ -z "$dontAddPrefix" -a -n "$prefix" ]; then configureFlags="${prefixKey:---prefix=}$prefix $configureFlags" fi # Add --disable-dependency-tracking to speed up some builds. if [ -z "$dontAddDisableDepTrack" ]; then if grep -q dependency-tracking $configureScript; then configureFlags="--disable-dependency-tracking $configureFlags" fi fi # By default, disable static builds. if [ -z "$dontDisableStatic" ]; then if grep -q enable-static $configureScript; then configureFlags="--disable-static $configureFlags" fi fi echo "configure flags: $configureFlags ${configureFlagsArray[@]}" $configureScript $configureFlags "${configureFlagsArray[@]}" runHook postConfigure } buildPhase() { runHook preBuild if [ -z "$makeFlags" ] && ! [ -n "$makefile" -o -e "Makefile" -o -e "makefile" -o -e "GNUmakefile" ]; then echo "no Makefile, doing nothing" return fi # See https://github.com/NixOS/nixpkgs/pull/1354#issuecomment-31260409 makeFlags="SHELL=$SHELL $makeFlags" echo "make flags: $makeFlags ${makeFlagsArray[@]} $buildFlags ${buildFlagsArray[@]}" make ${makefile:+-f $makefile} \ ${enableParallelBuilding:+-j${NIX_BUILD_CORES} -l${NIX_BUILD_CORES}} \ $makeFlags "${makeFlagsArray[@]}" \ $buildFlags "${buildFlagsArray[@]}" runHook postBuild } checkPhase() { runHook preCheck echo "check flags: $makeFlags ${makeFlagsArray[@]} $checkFlags ${checkFlagsArray[@]}" make ${makefile:+-f $makefile} \ ${enableParallelBuilding:+-j${NIX_BUILD_CORES} -l${NIX_BUILD_CORES}} \ $makeFlags "${makeFlagsArray[@]}" \ ${checkFlags:-VERBOSE=y} "${checkFlagsArray[@]}" ${checkTarget:-check} runHook postCheck } installPhase() { runHook preInstall if [ -n "$prefix" ]; then mkdir -p "$prefix" fi installTargets=${installTargets:-install} echo "install flags: $installTargets $makeFlags ${makeFlagsArray[@]} $installFlags ${installFlagsArray[@]}" make ${makefile:+-f $makefile} $installTargets \ $makeFlags "${makeFlagsArray[@]}" \ $installFlags "${installFlagsArray[@]}" 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. 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 # Multiple-output derivations mostly choose $dev instead of $out local prOut="${propagateIntoOutput:-$out}" if [ -n "$propagatedBuildInputs" ]; then mkdir -p "$prOut/nix-support" echo "$propagatedBuildInputs" > "$prOut/nix-support/propagated-build-inputs" fi if [ -n "$propagatedNativeBuildInputs" ]; then mkdir -p "$prOut/nix-support" echo "$propagatedNativeBuildInputs" > "$prOut/nix-support/propagated-native-build-inputs" fi if [ -n "$propagatedUserEnvPkgs" ]; then mkdir -p "$prOut/nix-support" echo "$propagatedUserEnvPkgs" > "$prOut/nix-support/propagated-user-env-packages" fi if [ -n "$setupHook" ]; then mkdir -p "$prOut/nix-support" substituteAll "$setupHook" "$prOut/nix-support/setup-hook" fi runHook postFixup } installCheckPhase() { runHook preInstallCheck echo "installcheck flags: $makeFlags ${makeFlagsArray[@]} $installCheckFlags ${installCheckFlagsArray[@]}" make ${makefile:+-f $makefile} \ ${enableParallelBuilding:+-j${NIX_BUILD_CORES} -l${NIX_BUILD_CORES}} \ $makeFlags "${makeFlagsArray[@]}" \ $installCheckFlags "${installCheckFlagsArray[@]}" ${installCheckTarget:-installcheck} runHook postInstallCheck } distPhase() { runHook preDist echo "dist flags: $distFlags ${distFlagsArray[@]}" make ${makefile:+-f $makefile} $distFlags "${distFlagsArray[@]}" ${distTarget:-dist} if [ "$dontCopyDist" != 1 ]; then mkdir -p "$out/tarballs" # Note: don't quote $tarballs, since we explicitly permit # wildcards in there. 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 [ -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" = buildPhase -a -n "$dontBuild" ]; then continue; fi if [ "$curPhase" = checkPhase -a -z "$doCheck" ]; then continue; fi if [ "$curPhase" = installPhase -a -n "$dontInstall" ]; then continue; fi if [ "$curPhase" = fixupPhase -a -n "$dontFixup" ]; then continue; fi if [ "$curPhase" = installCheckPhase -a -z "$doInstallCheck" ]; then continue; fi if [ "$curPhase" = distPhase -a -z "$doDist" ]; then continue; fi if [ -n "$tracePhases" ]; then echo echo "@ phase-started $out $curPhase" fi showPhaseHeader "$curPhase" dumpVars # Evaluate the variable named $curPhase if it exists, otherwise the # function named $curPhase. eval "${!curPhase:-$curPhase}" if [ "$curPhase" = unpackPhase ]; then cd "${sourceRoot:-.}" fi if [ -n "$tracePhases" ]; then echo echo "@ phase-succeeded $out $curPhase" fi stopNest 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