232 lines
9 KiB
Nix
232 lines
9 KiB
Nix
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{ lib, stdenv, echo_colored, noisily, mkRustcDepArgs, mkRustcFeatureArgs }:
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{
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build
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, buildDependencies
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, codegenUnits
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, colors
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, completeBuildDeps
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, completeDeps
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, crateAuthors
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, crateDescription
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, crateFeatures
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, crateHomepage
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, crateLicense
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, crateLicenseFile
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, crateLinks
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, crateName
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, crateReadme
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, crateRenames
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, crateRepository
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, crateRustVersion
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, crateVersion
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, extraLinkFlags
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, extraRustcOptsForBuildRs
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, libName
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, libPath
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, release
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, verbose
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, workspace_member }:
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let version_ = lib.splitString "-" crateVersion;
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versionPre = lib.optionalString (lib.tail version_ != []) (lib.elemAt version_ 1);
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version = lib.splitVersion (lib.head version_);
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rustcOpts = lib.foldl' (opts: opt: opts + " " + opt)
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(if release then "-C opt-level=3" else "-C debuginfo=2")
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(["-C codegen-units=${toString codegenUnits}"] ++ extraRustcOptsForBuildRs);
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buildDeps = mkRustcDepArgs buildDependencies crateRenames;
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authors = lib.concatStringsSep ":" crateAuthors;
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optLevel = if release then 3 else 0;
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completeDepsDir = lib.concatStringsSep " " completeDeps;
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completeBuildDepsDir = lib.concatStringsSep " " completeBuildDeps;
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envFeatures = lib.concatStringsSep " " (
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map (f: lib.replaceStrings ["-"] ["_"] (lib.toUpper f)) crateFeatures
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);
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in ''
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${echo_colored colors}
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${noisily colors verbose}
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source ${./lib.sh}
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${lib.optionalString (workspace_member != null) ''
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noisily cd "${workspace_member}"
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''}
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${lib.optionalString (workspace_member == null) ''
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echo_colored "Searching for matching Cargo.toml (${crateName})"
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local cargo_toml_dir=$(matching_cargo_toml_dir "${crateName}")
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if [ -z "$cargo_toml_dir" ]; then
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echo_error "ERROR configuring ${crateName}: No matching Cargo.toml in $(pwd) found." >&2
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exit 23
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fi
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noisily cd "$cargo_toml_dir"
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''}
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runHook preConfigure
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symlink_dependency() {
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# $1 is the nix-store path of a dependency
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# $2 is the target path
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i=$1
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ln -s -f $i/lib/*.rlib $2 #*/
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ln -s -f $i/lib/*.so $i/lib/*.dylib $2 #*/
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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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# The following steps set up the dependencies of the crate. Two
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# kinds of dependencies are distinguished: build dependencies
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# (used by the build script) and crate dependencies. For each
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# dependency we have to:
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#
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# - Make its Rust library available to rustc. This is done by
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# symlinking all library dependencies into a directory that
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# can be provided to rustc.
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# - Accumulate linking flags. These flags are largely used for
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# linking native libraries.
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#
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# The crate link flags are added to the `link` and `link.final`
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# files. The `link` file is used for linkage in the current
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# crate. The `link.final` file will be copied to the output and can
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# be used by downstream crates to get the linker flags of this
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# crate.
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mkdir -p target/{deps,lib,build,buildDeps}
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chmod uga+w target -R
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echo ${extraLinkFlags} > target/link
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echo ${extraLinkFlags} > target/link.final
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# Prepare crate dependencies
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for i in ${completeDepsDir}; do
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symlink_dependency $i target/deps
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if [ -e "$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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done
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# Prepare crate build dependencies that are used for the build script.
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for i in ${completeBuildDepsDir}; do
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symlink_dependency $i target/buildDeps
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if [ -e "$i/lib/link" ]; then
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cat $i/lib/link >> target/link.build
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fi
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done
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# Remove duplicate linker flags from the build dependencies.
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if [[ -e target/link.build ]]; then
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sort -uo target/link.build target/link.build
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fi
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# Remove duplicate linker flags from the dependencies.
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sort -uo target/link target/link
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tr '\n' ' ' < target/link > target/link_
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# Remove duplicate linker flags from the that are written
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# to the derivation's output.
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sort -uo target/link.final target/link.final
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EXTRA_BUILD=""
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BUILD_OUT_DIR=""
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# Set up Cargo Environment variables: https://doc.rust-lang.org/cargo/reference/environment-variables.html
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export CARGO_PKG_NAME=${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_PKG_DESCRIPTION="${crateDescription}"
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export CARGO_CFG_TARGET_ARCH=${stdenv.hostPlatform.rust.platform.arch}
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export CARGO_CFG_TARGET_OS=${stdenv.hostPlatform.rust.platform.os}
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export CARGO_CFG_TARGET_FAMILY="unix"
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export CARGO_CFG_UNIX=1
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export CARGO_CFG_TARGET_ENV="gnu"
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export CARGO_CFG_TARGET_ENDIAN=${if stdenv.hostPlatform.parsed.cpu.significantByte.name == "littleEndian" then "little" else "big"}
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export CARGO_CFG_TARGET_POINTER_WIDTH=${with stdenv.hostPlatform; toString (if isILP32 then 32 else parsed.cpu.bits)}
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export CARGO_CFG_TARGET_VENDOR=${stdenv.hostPlatform.parsed.vendor.name}
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export CARGO_MANIFEST_DIR=$(pwd)
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export CARGO_MANIFEST_LINKS=${crateLinks}
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export DEBUG="${toString (!release)}"
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export OPT_LEVEL="${toString optLevel}"
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export TARGET="${stdenv.hostPlatform.rust.rustcTargetSpec}"
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export HOST="${stdenv.buildPlatform.rust.rustcTargetSpec}"
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export PROFILE=${if release then "release" else "debug"}
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export OUT_DIR=$(pwd)/target/build/${crateName}.out
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export CARGO_PKG_VERSION_MAJOR=${lib.elemAt version 0}
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export CARGO_PKG_VERSION_MINOR=${lib.elemAt version 1}
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export CARGO_PKG_VERSION_PATCH=${lib.elemAt version 2}
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export CARGO_PKG_VERSION_PRE="${versionPre}"
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export CARGO_PKG_HOMEPAGE="${crateHomepage}"
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export CARGO_PKG_LICENSE="${crateLicense}"
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export CARGO_PKG_LICENSE_FILE="${crateLicenseFile}"
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export CARGO_PKG_README="${crateReadme}"
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export CARGO_PKG_REPOSITORY="${crateRepository}"
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export CARGO_PKG_RUST_VERSION="${crateRustVersion}"
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export NUM_JOBS=$NIX_BUILD_CORES
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export RUSTC="rustc"
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export RUSTDOC="rustdoc"
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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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# Compile and run the build script, when available.
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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.build ]; then
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EXTRA_BUILD_FLAGS="$EXTRA_BUILD_FLAGS $(tr '\n' ' ' < target/link.build)"
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fi
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noisily rustc --crate-name build_script_build $BUILD --crate-type bin ${rustcOpts} \
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${mkRustcFeatureArgs 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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(
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# Features should be set as environment variable for build scripts:
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# https://doc.rust-lang.org/cargo/reference/environment-variables.html#environment-variables-cargo-sets-for-build-scripts
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for feature in ${envFeatures}; do
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export CARGO_FEATURE_$feature=1
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done
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target/build/${crateName}/build_script_build > target/build/${crateName}.opt
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)
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set +e
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EXTRA_BUILD=$(sed -n "s/^cargo:rustc-flags=\(.*\)/\1/p" target/build/${crateName}.opt | tr '\n' ' ' | sort -u)
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EXTRA_FEATURES=$(sed -n "s/^cargo:rustc-cfg=\(.*\)/--cfg \1/p" target/build/${crateName}.opt | tr '\n' ' ')
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EXTRA_LINK_ARGS=$(sed -n "s/^cargo:rustc-link-arg=\(.*\)/-C link-arg=\1/p" target/build/${crateName}.opt | tr '\n' ' ')
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EXTRA_LINK_ARGS_BINS=$(sed -n "s/^cargo:rustc-link-arg-bins=\(.*\)/-C link-arg=\1/p" target/build/${crateName}.opt | tr '\n' ' ')
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EXTRA_LINK_ARGS_LIB=$(sed -n "s/^cargo:rustc-link-arg-lib=\(.*\)/-C link-arg=\1/p" target/build/${crateName}.opt | tr '\n' ' ')
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EXTRA_LINK_LIBS=$(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/${crateName}.opt | tr '\n' ' ' | sort -u)
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# We want to read part of every line that has cargo:rustc-env= prefix and
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# export it as environment variables. This turns out tricky if the lines
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# have spaces: we can't wrap the command in double quotes as that captures
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# all the lines in single output. We can't use while read loop because
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# exporting from inside of it doesn't make it to the outside scope. We
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# can't use xargs as export is a built-in and does not work from it. As a
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# last resort then, we change the IFS so that the for loop does not split
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# on spaces and reset it after we are done. See ticket #199298.
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#
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_OLDIFS="$IFS"
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IFS=$'\n'
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for env in $(sed -n "s/^cargo:rustc-env=\(.*\)/\1/p" target/build/${crateName}.opt); do
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export "$env"
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done
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IFS="$_OLDIFS"
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CRATENAME=$(echo ${crateName} | sed -e "s/\(.*\)-sys$/\U\1/" -e "s/-/_/g")
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grep -P "^cargo:(?!(rustc-|warning=|rerun-if-changed=|rerun-if-env-changed))" target/build/${crateName}.opt \
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| awk -F= "/^cargo:/ { sub(/^cargo:/, \"\", \$1); gsub(/-/, \"_\", \$1); print \"export \" toupper(\"DEP_$(echo $CRATENAME)_\" \$1) \"=\" \$2 }" > target/env
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set -e
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fi
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runHook postConfigure
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''
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