388 lines
14 KiB
Nix
388 lines
14 KiB
Nix
# Code for buildRustCrate, a Nix function that builds Rust code, just
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# like Cargo, but using Nix instead.
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#
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# This can be useful for deploying packages with NixOps, and to share
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# binary dependencies between projects.
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{ lib, buildPlatform, stdenv, defaultCrateOverrides, fetchCrate, ncurses, rustc }:
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let buildCrate = { crateName, crateVersion, crateAuthors, buildDependencies,
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dependencies, completeDeps, completeBuildDeps,
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crateFeatures, libName, build, release, libPath,
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crateType, metadata, crateBin, finalBins,
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verbose, colors }:
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let depsDir = lib.concatStringsSep " " dependencies;
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completeDepsDir = lib.concatStringsSep " " completeDeps;
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completeBuildDepsDir = lib.concatStringsSep " " completeBuildDeps;
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makeDeps = dependencies:
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(lib.concatMapStringsSep " " (dep:
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let extern = lib.strings.replaceStrings ["-"] ["_"] dep.libName; in
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(if dep.crateType == "lib" then
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" --extern ${extern}=${dep.out}/lib/lib${extern}-${dep.metadata}.rlib"
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else
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" --extern ${extern}=${dep.out}/lib/lib${extern}-${dep.metadata}${buildPlatform.extensions.sharedLibrary}")
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) dependencies);
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deps = makeDeps dependencies;
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buildDeps = makeDeps buildDependencies;
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optLevel = if release then 3 else 0;
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rustcOpts = (if release then "-C opt-level=3" else "-C debuginfo=2");
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rustcMeta = "-C metadata=${metadata} -C extra-filename=-${metadata}";
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version_ = lib.splitString "-" crateVersion;
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versionPre = if lib.tail version_ == [] then "" else builtins.elemAt version_ 1;
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version = lib.splitString "." (lib.head version_);
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authors = lib.concatStringsSep ":" crateAuthors;
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in ''
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norm=""
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bold=""
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green=""
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boldgreen=""
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if [[ "${colors}" -eq "always" ]]; then
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norm="$(printf '\033[0m')" #returns to "normal"
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bold="$(printf '\033[0;1m')" #set bold
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green="$(printf '\033[0;32m')" #set green
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boldgreen="$(printf '\033[0;1;32m')" #set bold, and set green.
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fi
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echo_build_heading() {
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start=""
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end=""
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if [[ x"${colors}" -eq x"always" ]]; then
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start="$(printf '\033[0;1;32m')" #set bold, and set green.
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end="$(printf '\033[0m')" #returns to "normal"
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fi
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if (( $# == 1 )); then
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echo "$start""Building $1""$end"
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else
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echo "$start""Building $1 ($2)""$end"
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fi
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}
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noisily() {
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start=""
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end=""
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if [[ x"${colors}" -eq x"always" ]]; then
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start="$(printf '\033[0;1;32m')" #set bold, and set green.
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end="$(printf '\033[0m')" #returns to "normal"
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fi
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${lib.optionalString verbose ''
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echo -n "$start"Running "$end"
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echo $@
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''}
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$@
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}
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symlink_dependency() {
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# $1 is the nix-store path of a dependency
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i=$1
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dest=target/deps
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if [ ! -z $2 ]; then
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if [ "$2" = "--buildDep" ]; then
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dest=target/buildDeps
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fi
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fi
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ln -s -f $i/lib/*.rlib $dest #*/
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ln -s -f $i/lib/*.so $i/lib/*.dylib $dest #*/
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if [ -e "$i/lib/link" ]; then
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cat $i/lib/link >> target/link
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cat $i/lib/link >> target/link.final
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fi
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if [ -e $i/env ]; then
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source $i/env
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fi
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}
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build_lib() {
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lib_src=$1
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echo_build_heading $lib_src ${libName}
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noisily rustc --crate-name $CRATE_NAME $lib_src --crate-type ${crateType} \
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${rustcOpts} ${rustcMeta} ${crateFeatures} --out-dir target/lib \
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--emit=dep-info,link -L dependency=target/deps ${deps} --cap-lints allow \
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$BUILD_OUT_DIR $EXTRA_BUILD $EXTRA_FEATURES --color ${colors}
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EXTRA_LIB=" --extern $CRATE_NAME=target/lib/lib$CRATE_NAME-${metadata}.rlib"
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if [ -e target/deps/lib$CRATE_NAME-${metadata}${buildPlatform.extensions.sharedLibrary} ]; then
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EXTRA_LIB="$EXTRA_LIB --extern $CRATE_NAME=target/lib/lib$CRATE_NAME-${metadata}${buildPlatform.extensions.sharedLibrary}"
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fi
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}
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build_bin() {
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crate_name=$1
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crate_name_=$(echo $crate_name | sed -e "s/-/_/g")
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main_file=""
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if [[ ! -z $2 ]]; then
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main_file=$2
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fi
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echo_build_heading $@
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noisily rustc --crate-name $crate_name_ $main_file --crate-type bin ${rustcOpts}\
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${crateFeatures} --out-dir target/bin --emit=dep-info,link -L dependency=target/deps \
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$LINK ${deps}$EXTRA_LIB --cap-lints allow \
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$BUILD_OUT_DIR $EXTRA_BUILD $EXTRA_FEATURES --color ${colors}
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if [ "$crate_name_" -ne "$crate_name" ]; then
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mv target/bin/$crate_name_ target/bin/$crate_name
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fi
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}
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runHook preBuild
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mkdir -p target/{deps,lib,build,buildDeps}
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chmod uga+w target -R
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for i in ${completeDepsDir}; do
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symlink_dependency $i
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done
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for i in ${completeBuildDepsDir}; do
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symlink_dependency $i --buildDep
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done
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if [ -e target/link ]; then
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sort -u target/link > target/link.sorted
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mv target/link.sorted target/link
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sort -u target/link.final > target/link.final.sorted
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mv target/link.final.sorted target/link.final
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tr '\n' ' ' < target/link > target/link_
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fi
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EXTRA_BUILD=""
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BUILD_OUT_DIR=""
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export CARGO_PKG_NAME=${crateName}
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export CARGO_PKG_VERSION=${crateVersion}
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export CARGO_PKG_AUTHORS="${authors}"
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export CARGO_CFG_TARGET_ARCH=${buildPlatform.parsed.cpu.name}
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export CARGO_CFG_TARGET_OS=${buildPlatform.parsed.kernel.name}
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export CARGO_CFG_TARGET_ENV="gnu"
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export CARGO_MANIFEST_DIR="."
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export DEBUG="${toString (!release)}"
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export OPT_LEVEL="${toString optLevel}"
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export TARGET="${buildPlatform.config}"
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export HOST="${buildPlatform.config}"
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export PROFILE=${if release then "release" else "debug"}
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export OUT_DIR=$(pwd)/target/build/${crateName}.out
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export CARGO_PKG_VERSION_MAJOR=${builtins.elemAt version 0}
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export CARGO_PKG_VERSION_MINOR=${builtins.elemAt version 1}
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export CARGO_PKG_VERSION_PATCH=${builtins.elemAt version 2}
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if [ -n "${versionPre}" ]; then
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export CARGO_PKG_VERSION_PRE="${versionPre}"
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fi
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BUILD=""
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if [[ ! -z "${build}" ]] ; then
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BUILD=${build}
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elif [[ -e "build.rs" ]]; then
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BUILD="build.rs"
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fi
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if [[ ! -z "$BUILD" ]] ; then
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echo_build_heading "$BUILD" ${libName}
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mkdir -p target/build/${crateName}
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EXTRA_BUILD_FLAGS=""
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if [ -e target/link_ ]; then
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EXTRA_BUILD_FLAGS=$(cat target/link_)
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fi
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if [ -e target/link.build ]; then
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EXTRA_BUILD_FLAGS="$EXTRA_BUILD_FLAGS $(cat target/link.build)"
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fi
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noisily rustc --crate-name build_script_build $BUILD --crate-type bin ${rustcOpts} \
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${crateFeatures} --out-dir target/build/${crateName} --emit=dep-info,link \
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-L dependency=target/buildDeps ${buildDeps} --cap-lints allow $EXTRA_BUILD_FLAGS --color ${colors}
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mkdir -p target/build/${crateName}.out
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export RUST_BACKTRACE=1
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BUILD_OUT_DIR="-L $OUT_DIR"
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mkdir -p $OUT_DIR
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target/build/${crateName}/build_script_build > target/build/${crateName}.opt
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set +e
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EXTRA_BUILD=$(sed -n "s/^cargo:rustc-flags=\(.*\)/\1/p" target/build/${crateName}.opt | tr '\n' ' ')
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EXTRA_FEATURES=$(sed -n "s/^cargo:rustc-cfg=\(.*\)/--cfg \1/p" target/build/${crateName}.opt | tr '\n' ' ')
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EXTRA_LINK=$(sed -n "s/^cargo:rustc-link-lib=\(.*\)/\1/p" target/build/${crateName}.opt | tr '\n' ' ')
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EXTRA_LINK_SEARCH=$(sed -n "s/^cargo:rustc-link-search=\(.*\)/\1/p" target/build/${crateName}.opt | tr '\n' ' ')
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CRATENAME=$(echo ${crateName} | sed -e "s/\(.*\)-sys$/\U\1/")
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grep -P "^cargo:(?!(rustc-|warning=|rerun-if-changed=|rerun-if-env-changed))" target/build/${crateName}.opt \
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| sed -e "s/cargo:\([^=]*\)=\(.*\)/export DEP_$(echo $CRATENAME)_\U\1\E=\2/" > target/env
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set -e
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if [ -n "$(ls target/build/${crateName}.out)" ]; then
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if [ -e "${libPath}" ] ; then
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cp -r target/build/${crateName}.out/* $(dirname ${libPath}) #*/
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else
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cp -r target/build/${crateName}.out/* src #*/
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fi
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fi
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fi
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EXTRA_LIB=""
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CRATE_NAME=$(echo ${libName} | sed -e "s/-/_/g")
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if [ -e target/link_ ]; then
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EXTRA_BUILD="$(cat target/link_) $EXTRA_BUILD"
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fi
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if [ -e "${libPath}" ] ; then
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build_lib ${libPath}
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elif [ -e src/lib.rs ] ; then
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build_lib src/lib.rs
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elif [ -e src/${libName}.rs ] ; then
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build_lib src/${libName}.rs
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fi
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echo "$EXTRA_LINK_SEARCH" | while read i; do
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if [ ! -z "$i" ]; then
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for lib in $i; do
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echo "-L $lib" >> target/link
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L=$(echo $lib | sed -e "s#$(pwd)/target/build#$out/lib#")
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echo "-L $L" >> target/link.final
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done
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fi
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done
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echo "$EXTRA_LINK" | while read i; do
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if [ ! -z "$i" ]; then
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for lib in $i; do
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echo "-l $lib" >> target/link
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echo "-l $lib" >> target/link.final
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done
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fi
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done
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if [ -e target/link ]; then
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sort -u target/link.final > target/link.final.sorted
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mv target/link.final.sorted target/link.final
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sort -u target/link > target/link.sorted
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mv target/link.sorted target/link
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tr '\n' ' ' < target/link > target/link_
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LINK=$(cat target/link_)
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fi
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mkdir -p target/bin
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echo "${crateBin}" | sed -n 1'p' | tr ',' '\n' | while read BIN; do
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if [ ! -z "$BIN" ]; then
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build_bin $BIN
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fi
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done
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${lib.optionalString (crateBin == "") ''
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if [[ -e src/main.rs ]]; then
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build_bin ${crateName} src/main.rs
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fi
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for i in src/bin/*.rs; do #*/
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build_bin "$(basename $i .rs)" "$i"
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done
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''}
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# Remove object files to avoid "wrong ELF type"
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find target -type f -name "*.o" -print0 | xargs -0 rm -f
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runHook postBuild
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'' + finalBins;
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installCrate = crateName: ''
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mkdir -p $out
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if [ -s target/env ]; then
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cp target/env $out/env
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fi
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if [ -s target/link.final ]; then
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mkdir -p $out/lib
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cp target/link.final $out/lib/link
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fi
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if [ "$(ls -A target/lib)" ]; then
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mkdir -p $out/lib
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cp target/lib/* $out/lib #*/
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fi
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if [ "$(ls -A target/build)" ]; then # */
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mkdir -p $out/lib
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cp -r target/build/* $out/lib # */
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fi
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if [ "$(ls -A target/bin)" ]; then
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mkdir -p $out/bin
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cp -P target/bin/* $out/bin # */
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fi
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'';
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in
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crate_: lib.makeOverridable ({ rust, release, verbose, features, buildInputs, crateOverrides }:
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let crate = crate_ // (lib.attrByPath [ crate_.crateName ] (attr: {}) crateOverrides crate_);
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processedAttrs = [
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"src" "buildInputs" "crateBin" "crateLib" "libName" "libPath"
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"buildDependencies" "dependencies" "features"
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"crateName" "version" "build" "authors" "colors"
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];
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extraDerivationAttrs = lib.filterAttrs (n: v: ! lib.elem n processedAttrs) crate;
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buildInputs_ = buildInputs;
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in
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stdenv.mkDerivation (rec {
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inherit (crate) crateName;
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src = if lib.hasAttr "src" crate then
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crate.src
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else
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fetchCrate { inherit (crate) crateName version sha256; };
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name = "rust_${crate.crateName}-${crate.version}";
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buildInputs = [ rust ncurses ] ++ (crate.buildInputs or []) ++ buildInputs_;
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dependencies =
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builtins.map
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(dep: dep.override { rust = rust; release = release; verbose = verbose; crateOverrides = crateOverrides; })
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(crate.dependencies or []);
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buildDependencies =
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builtins.map
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(dep: dep.override { rust = rust; release = release; verbose = verbose; crateOverrides = crateOverrides; })
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(crate.buildDependencies or []);
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completeDeps = lib.lists.unique (dependencies ++ lib.lists.concatMap (dep: dep.completeDeps) dependencies);
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completeBuildDeps = lib.lists.unique (
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buildDependencies
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++ lib.lists.concatMap (dep: dep.completeBuildDeps ++ dep.completeDeps) buildDependencies
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);
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crateFeatures = if crate ? features then
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lib.concatMapStringsSep " " (f: "--cfg feature=\\\"${f}\\\"") (crate.features ++ features)
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else "";
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libName = if crate ? libName then crate.libName else crate.crateName;
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libPath = if crate ? libPath then crate.libPath else "";
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metadata = builtins.substring 0 10 (builtins.hashString "sha256" (crateName + "-" + crateVersion));
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crateBin = if crate ? crateBin then
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builtins.foldl' (bins: bin:
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let name =
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lib.strings.replaceStrings ["-"] ["_"]
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(if bin ? name then bin.name else crateName);
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path = if bin ? path then bin.path else "src/main.rs";
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in
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bins + (if bin == "" then "" else ",") + "${name} ${path}"
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) "" crate.crateBin
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else "";
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finalBins = if crate ? crateBin then
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builtins.foldl' (bins: bin:
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let name = lib.strings.replaceStrings ["-"] ["_"]
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(if bin ? name then bin.name else crateName);
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new_name = if bin ? name then bin.name else crateName;
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in
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if name == new_name then bins else
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(bins + "mv target/bin/${name} target/bin/${new_name};")
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) "" crate.crateBin
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else "";
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build = if crate ? build then crate.build else "";
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crateVersion = crate.version;
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crateAuthors = if crate ? authors && lib.isList crate.authors then crate.authors else [];
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crateType =
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if lib.attrByPath ["procMacro"] false crate then "proc-macro" else
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if lib.attrByPath ["plugin"] false crate then "dylib" else "lib";
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colors = lib.attrByPath [ "colors" ] "always" crate;
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buildPhase = buildCrate {
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inherit crateName dependencies buildDependencies completeDeps completeBuildDeps
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crateFeatures libName build release libPath crateType crateVersion
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crateAuthors metadata crateBin finalBins verbose colors;
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};
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installPhase = installCrate crateName;
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} // extraDerivationAttrs)) {
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rust = rustc;
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release = true;
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verbose = true;
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features = [];
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buildInputs = [];
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crateOverrides = defaultCrateOverrides;
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}
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