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// Copyright (c) The nextest Contributors
// SPDX-License-Identifier: MIT OR Apache-2.0
use crate::{
cargo_config::TargetTriple,
errors::{RustBuildMetaParseError, UnknownHostPlatform},
helpers::convert_rel_path_to_main_sep,
list::{BinaryListState, TestListState},
platform::BuildPlatforms,
reuse_build::PathMapper,
};
use camino::Utf8PathBuf;
use nextest_metadata::{RustBuildMetaSummary, RustNonTestBinarySummary};
use std::{
collections::{BTreeMap, BTreeSet},
marker::PhantomData,
};
/// Rust-related metadata used for builds and test runs.
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct RustBuildMeta<State> {
/// The target directory for build artifacts.
pub target_directory: Utf8PathBuf,
/// A list of base output directories, relative to the target directory. These directories
/// and their "deps" subdirectories are added to the dynamic library path.
pub base_output_directories: BTreeSet<Utf8PathBuf>,
/// Information about non-test executables, keyed by package ID.
pub non_test_binaries: BTreeMap<String, BTreeSet<RustNonTestBinarySummary>>,
/// A list of linked paths, relative to the target directory. These directories are
/// added to the dynamic library path.
///
/// The values are the package IDs of the libraries that requested the linked paths.
///
/// Note that the serialized metadata only has the paths for now, not the libraries that
/// requested them. We might consider adding a new field with metadata about that.
pub linked_paths: BTreeMap<Utf8PathBuf, BTreeSet<String>>,
/// The target triple used while compiling the artifacts
pub target_triple: Option<TargetTriple>,
state: PhantomData<State>,
}
impl RustBuildMeta<BinaryListState> {
/// Creates a new [`RustBuildMeta`].
pub fn new(
target_directory: impl Into<Utf8PathBuf>,
target_triple: Option<TargetTriple>,
) -> Self {
Self {
target_directory: target_directory.into(),
base_output_directories: BTreeSet::new(),
non_test_binaries: BTreeMap::new(),
linked_paths: BTreeMap::new(),
state: PhantomData,
target_triple,
}
}
/// Maps paths using a [`PathMapper`] to convert this to [`TestListState`].
pub fn map_paths(&self, path_mapper: &PathMapper) -> RustBuildMeta<TestListState> {
RustBuildMeta {
target_directory: path_mapper
.new_target_dir()
.unwrap_or(&self.target_directory)
.to_path_buf(),
// Since these are relative paths, they don't need to be mapped.
base_output_directories: self.base_output_directories.clone(),
non_test_binaries: self.non_test_binaries.clone(),
linked_paths: self.linked_paths.clone(),
state: PhantomData,
target_triple: self.target_triple.clone(),
}
}
}
impl RustBuildMeta<TestListState> {
/// Empty metadata for tests.
#[cfg(test)]
pub(crate) fn empty() -> Self {
Self {
target_directory: Utf8PathBuf::new(),
base_output_directories: BTreeSet::new(),
non_test_binaries: BTreeMap::new(),
linked_paths: BTreeMap::new(),
state: PhantomData,
target_triple: None,
}
}
/// Returns the dynamic library paths corresponding to this metadata.
///
/// [See this Cargo documentation for more.](https://doc.rust-lang.org/cargo/reference/environment-variables.html#dynamic-library-paths)
///
/// These paths are prepended to the dynamic library environment variable for the current
/// platform (e.g. `LD_LIBRARY_PATH` on non-Apple Unix platforms).
pub fn dylib_paths(&self) -> Vec<Utf8PathBuf> {
// FIXME/HELP WANTED: get the rustc sysroot library path here.
// See https://github.com/nextest-rs/nextest/issues/267.
// Cargo puts linked paths before base output directories.
self.linked_paths
.keys()
.filter_map(|rel_path| {
let join_path = self
.target_directory
.join(convert_rel_path_to_main_sep(rel_path));
// Only add the directory to the path if it exists on disk.
join_path.exists().then_some(join_path)
})
.chain(self.base_output_directories.iter().flat_map(|base_output| {
let abs_base = self
.target_directory
.join(convert_rel_path_to_main_sep(base_output));
let with_deps = abs_base.join("deps");
// This is the order paths are added in by Cargo.
[with_deps, abs_base]
}))
.collect()
}
}
impl<State> RustBuildMeta<State> {
/// Returns the build platforms.
pub fn build_platforms(&self) -> Result<BuildPlatforms, UnknownHostPlatform> {
BuildPlatforms::new(self.target_triple.clone())
}
/// Creates a `RustBuildMeta` from a serializable summary.
pub fn from_summary(summary: RustBuildMetaSummary) -> Result<Self, RustBuildMetaParseError> {
let target_triple = if !summary.target_platforms.is_empty() {
// TODO: support multiple --target options
TargetTriple::deserialize(summary.target_platforms.first().cloned())?
} else {
// Compatibility with metadata generated by older versions of nextest.
TargetTriple::deserialize_str(summary.target_platform)?
};
Ok(Self {
target_directory: summary.target_directory,
base_output_directories: summary.base_output_directories,
non_test_binaries: summary.non_test_binaries,
linked_paths: summary
.linked_paths
.into_iter()
.map(|linked_path| (linked_path, BTreeSet::new()))
.collect(),
state: PhantomData,
target_triple,
})
}
/// Converts self to a serializable form.
pub fn to_summary(&self) -> RustBuildMetaSummary {
RustBuildMetaSummary {
target_directory: self.target_directory.clone(),
base_output_directories: self.base_output_directories.clone(),
non_test_binaries: self.non_test_binaries.clone(),
linked_paths: self.linked_paths.keys().cloned().collect(),
target_platform: self
.target_triple
.as_ref()
.map(|triple| triple.platform.triple_str().to_owned()),
// TODO: support multiple --target options
target_platforms: TargetTriple::serialize(self.target_triple.as_ref())
.into_iter()
.collect(),
}
}
}