nixpkgs/pkgs/build-support/rust/build-rust-crate/lib.sh
2020-08-09 17:47:12 +10:00

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echo_build_heading() {
if (( $# == 1 )); then
echo_colored "Building $1"
else
echo_colored "Building $1 ($2)"
fi
}
build_lib() {
lib_src=$1
echo_build_heading $lib_src ${libName}
noisily rustc \
--crate-name $CRATE_NAME \
$lib_src \
--out-dir target/lib \
-L dependency=target/deps \
--cap-lints allow \
$LIB_RUSTC_OPTS \
$BUILD_OUT_DIR \
$EXTRA_BUILD \
$EXTRA_FEATURES \
$EXTRA_RUSTC_FLAGS \
--color $colors
EXTRA_LIB=" --extern $CRATE_NAME=target/lib/lib$CRATE_NAME-$metadata.rlib"
if [ -e target/deps/lib$CRATE_NAME-$metadata$LIB_EXT ]; then
EXTRA_LIB="$EXTRA_LIB --extern $CRATE_NAME=target/lib/lib$CRATE_NAME-$metadata$LIB_EXT"
fi
}
build_bin() {
local crate_name=$1
local crate_name_=$(echo $crate_name | tr '-' '_')
local main_file=""
if [[ ! -z $2 ]]; then
main_file=$2
fi
echo_build_heading $@
noisily rustc \
--crate-name $crate_name_ \
$main_file \
--crate-type bin \
$BIN_RUSTC_OPTS \
--out-dir target/bin \
-L dependency=target/deps \
$LINK \
$EXTRA_LIB \
--cap-lints allow \
$BUILD_OUT_DIR \
$EXTRA_BUILD \
$EXTRA_FEATURES \
$EXTRA_RUSTC_FLAGS \
--color ${colors} \
if [ "$crate_name_" != "$crate_name" ]; then
mv target/bin/$crate_name_ target/bin/$crate_name
fi
}
build_lib_test() {
local file="$1"
EXTRA_RUSTC_FLAGS="--test $EXTRA_RUSTC_FLAGS" build_lib "$1" "$2"
}
build_bin_test() {
local crate="$1"
local file="$2"
EXTRA_RUSTC_FLAGS="--test $EXTRA_RUSTC_FLAGS" build_bin "$1" "$2"
}
build_bin_test_file() {
local file="$1"
local derived_crate_name="${file//\//_}"
derived_crate_name="${derived_crate_name%.rs}"
build_bin_test "$derived_crate_name" "$file"
}
# Add additional link options that were provided by the build script.
setup_link_paths() {
EXTRA_LIB=""
if [[ -e target/link_ ]]; then
EXTRA_BUILD="$(cat target/link_) $EXTRA_BUILD"
fi
echo "$EXTRA_LINK_SEARCH" | while read i; do
if [[ ! -z "$i" ]]; then
for library in $i; do
echo "-L $library" >> target/link
L=$(echo $library | sed -e "s#$(pwd)/target/build#$lib/lib#")
echo "-L $L" >> target/link.final
done
fi
done
echo "$EXTRA_LINK" | while read i; do
if [[ ! -z "$i" ]]; then
for library in $i; do
echo "-l $library" >> target/link
echo "-l $library" >> target/link.final
done
fi
done
if [[ -e target/link ]]; then
tr '\n' ' ' < target/link > target/link_
LINK=$(cat target/link_)
fi
}
search_for_bin_path() {
# heuristic to "guess" the correct source file as found in cargo:
# https://github.com/rust-lang/cargo/blob/90fc9f620190d5fa3c80b0c8c65a1e1361e6b8ae/src/cargo/util/toml/targets.rs#L308-L325
BIN_NAME=$1
BIN_NAME_=$(echo $BIN_NAME | tr '-' '_')
# the first two cases are the "new" default IIRC
FILES=( "src/bin/$BIN_NAME.rs" "src/bin/$BIN_NAME/main.rs" "src/bin/$BIN_NAME_.rs" "src/bin/$BIN_NAME_/main.rs" "src/bin/main.rs" "src/main.rs" )
if ! [ -e "$LIB_PATH" -o -e src/lib.rs -o -e "src/$LIB_NAME.rs" ]; then
# if this is not a library the following path is also valid
FILES=( "src/$BIN_NAME.rs" "src/$BIN_NAME_.rs" "${FILES[@]}" )
fi
for file in "${FILES[@]}";
do
echo "checking file $file"
# first file that exists wins
if [[ -e "$file" ]]; then
BIN_PATH="$file"
break
fi
done
if [[ -z "$BIN_PATH" ]]; then
echo_error "ERROR: failed to find file for binary target: $BIN_NAME" >&2
exit 1
fi
}
# Extracts cargo_toml_path of the matching crate.
matching_cargo_toml_path() {
local manifest_path="$1"
local expected_crate_name="$2"
# If the Cargo.toml is not a workspace root,
# it will only contain one package in ".packages"
# because "--no-deps" suppressed dependency resolution.
#
# But to make it more general, we search for a matching
# crate in all packages and use the manifest path that
# is referenced there.
cargo metadata --no-deps --format-version 1 \
--manifest-path "$manifest_path" \
| jq -r '.packages[]
| select( .name == "'$expected_crate_name'")
| .manifest_path'
}
# Find a Cargo.toml in the current or any sub directory
# with a matching crate name.
matching_cargo_toml_dir() {
local expected_crate_name="$1"
find -L -name Cargo.toml | sort | while read manifest_path; do
echo "...checking manifest_path $manifest_path" >&2
local matching_path="$(matching_cargo_toml_path "$manifest_path" "$expected_crate_name")"
if [ -n "${matching_path}" ]; then
echo "$(dirname $matching_path)"
break
fi
done
}