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a3a51763f9
This helps us instruct rustc to build tests instead of binaries. The
actual build will then ONLY produce test executables. This is a first
step towards having rust crate tests within nixpkgs.
We default back to only a single output in test cases since that is the
only reasonable thing to do here.
Producing libraries or binaries in addition to tests would theoretically
be feasible but usually generates different dependency trees. It is very
common to have some libraries in `[dev-depdendencies]` within Cargo.toml
just for your tests. To not start mixing things up going with a
dedicated derivation for the test build sounds like the best choice for
now.
To use this you must provide a proper test dependency chain to
`buildRustCrate` (as you would usually do with your non-test inputs).
And then set the `buildTests` attribute to `true`. The derivation will
then contain all tests that were built in `$out/tests`. All common test
patterns and directories should be supported and tested by this change.
Below is an example how you would run a single test from the derivation.
This commit contains some more examples in the `buildRustCrateTests`
attribute set that might be helpful.
```
let
drv = buildRustCrate {
…
buildTests true;
};
in runCommand "test-my-crate" {} ''
touch $out
exec ${drv}/tests/my-test
''
```
139 lines
3.6 KiB
Bash
139 lines
3.6 KiB
Bash
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 \
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--crate-name $CRATE_NAME \
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$lib_src \
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--out-dir target/lib \
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--emit=dep-info,link \
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-L dependency=target/deps \
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--cap-lints allow \
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$LIB_RUSTC_OPTS \
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$BUILD_OUT_DIR \
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$EXTRA_BUILD \
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$EXTRA_FEATURES \
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$EXTRA_RUSTC_FLAGS \
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--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-$metadata$LIB_EXT ]; then
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EXTRA_LIB="$EXTRA_LIB --extern $CRATE_NAME=target/lib/lib$CRATE_NAME-$metadata$LIB_EXT"
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fi
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}
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build_bin() {
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local crate_name=$1
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local crate_name_=$(echo $crate_name | tr '-' '_')
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local 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 \
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--crate-name $crate_name_ \
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$main_file \
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--crate-type bin \
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$BIN_RUSTC_OPTS \
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--out-dir target/bin \
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--emit=dep-info,link \
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-L dependency=target/deps \
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$LINK \
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$EXTRA_LIB \
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--cap-lints allow \
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$BUILD_OUT_DIR \
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$EXTRA_BUILD \
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$EXTRA_FEATURES \
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$EXTRA_RUSTC_FLAGS \
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--color ${colors} \
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if [ "$crate_name_" != "$crate_name" ]; then
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mv target/bin/$crate_name_ target/bin/$crate_name
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fi
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}
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build_lib_test() {
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local file="$1"
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EXTRA_RUSTC_FLAGS="--test $EXTRA_RUSTC_FLAGS" build_lib "$1" "$2"
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}
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build_bin_test() {
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local crate="$1"
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local file="$2"
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EXTRA_RUSTC_FLAGS="--test $EXTRA_RUSTC_FLAGS" build_bin "$1" "$2"
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}
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build_bin_test_file() {
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local file="$1"
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local derived_crate_name="${file//\//_}"
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derived_crate_name="${derived_crate_name%.rs}"
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build_bin_test "$derived_crate_name" "$file"
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}
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setup_link_paths() {
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EXTRA_LIB=""
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if [[ -e target/link_ ]]; then
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EXTRA_BUILD="$(cat target/link_) $EXTRA_BUILD"
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fi
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echo "$EXTRA_LINK_SEARCH" | while read i; do
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if [[ ! -z "$i" ]]; then
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for library in $i; do
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echo "-L $library" >> target/link
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L=$(echo $library | sed -e "s#$(pwd)/target/build#$lib/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 library in $i; do
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echo "-l $library" >> target/link
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echo "-l $library" >> target/link.final
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done
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fi
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done
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if [[ -e target/link ]]; then
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sort -u target/link.final > target/link.final.sorted
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mv target/link.final.sorted target/link.final
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sort -u target/link > target/link.sorted
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mv target/link.sorted target/link
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tr '\n' ' ' < target/link > target/link_
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LINK=$(cat target/link_)
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fi
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}
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search_for_bin_path() {
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# heuristic to "guess" the correct source file as found in cargo:
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# https://github.com/rust-lang/cargo/blob/90fc9f620190d5fa3c80b0c8c65a1e1361e6b8ae/src/cargo/util/toml/targets.rs#L308-L325
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BIN_NAME=$1
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BIN_NAME_=$(echo $BIN_NAME | tr '-' '_')
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# the first two cases are the "new" default IIRC
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FILES=( "src/bin/$BIN_NAME.rs" "src/bin/$BIN_NAME/main.rs" "src/bin/$BIN_NAME_.rs" "src/bin/$BIN_NAME_/main.rs" "src/bin/main.rs" "src/main.rs" )
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if ! [ -e "$LIB_PATH" -o -e src/lib.rs -o -e "src/$LIB_NAME.rs" ]; then
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# if this is not a library the following path is also valid
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FILES=( "src/$BIN_NAME.rs" "src/$BIN_NAME_.rs" "${FILES[@]}" )
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fi
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for file in "${FILES[@]}";
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do
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echo "checking file $file"
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# first file that exists wins
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if [[ -e "$file" ]]; then
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BIN_PATH="$file"
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break
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fi
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done
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if [[ -z "$BIN_PATH" ]]; then
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echo "failed to find file for binary target: $BIN_NAME" >&2
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exit 1
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fi
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}
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