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add support for artifact dependencies (rust-lang#9096)
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Tracking issue: rust-lang#9096
Original PR: rust-lang#9992

Add 'bindeps' -Z flag for later use

A test to validate artifact dependencies aren't currently parsed.

Parse 'artifact' and 'lib' fields.

Note that this isn't behind a feature toggle so 'unused' messages will
disappear.

Transfer artifact dependencies from toml- into manifest-dependencies

There are a few premises governing the operation.

- if unstable features are not set, warn when 'artifact' or 'lib' is
  encountered.
- bail if 'lib' is encountered alone, but warn that this WOULD happen
  with nightly.
- artifact parsing checks for all invariants, but some aren't tested.

Assure serialization of 'artifact' and 'lib' fields produces suitable values during publishing

This should be the only place were these fields matter and where a cargo
manifest is actually produced. These are only for internal use, no user
is typically going to see or edit them.

Place all artifact dependency tests inta their own module

This facilitates deduplication later and possibly redistribution into
other modules if there is a better fit.

Represent artifacts that are rust libraries as another ArtifactKind

This is more consistent and probably simpler for later use.
No need to reflect the TOML data structure.

Add tests to assure only 'lib = true' artifact deps are documented

RFC-3028 doesn't talk about documentation, but for lib=true it's clear
what the desired behaviour should be.
If an artifact isn't a library though, then for now, it's transparent,
maybe.

Many more tests, more documentation, mild `Artifact` refactor

The latter seems to be a better fit for what being an artifact
really means within cargo, as it literally turns being a library
on or off, and thus only optionally becoming a normal library.

refactor to prepare for artifact related checks

Don't show a no-lib warning for artifact dependencies (with lib = false)

Tests for more artifact dependency invariants

These are merely a proof of concept to show that we are not in
a position to actually figure out everything about artifacts
right after resolution.

However, the error message looks more like a fatal error and less
like something that can happen with a more elaborate error message
with causes.

This might show that these kind of checks might be better done later
right before trying to use the information for create compile units.

Validate that artifact deps with lib=true still trigger no-lib warnings

This triggers the same warning as before, for now without any
customization to indicate it's an artifact dependency.

Use warnings instead of errors
------------------------------

This avoids the kind of harsh end of compilation in favor of something
that can be recovered from. Since warnings are annoying, users will
probably avoid re-declaring artifact dependencies.

Hook in artifact dependencies into build script runs

Even though we would still have to see what happens if they have a lib
as well. Is it built twice?

Also
----

- fly-by refactor: fix typo; use ? in method returning option
- Propagate artifact information into Units; put artifacts into place

  This means artifacts now have their own place in the 'artifact'
  directory and uplifts won't happen for them.

- refactor and fix cippy suggestion
- fix build after rebasing onto master

Create directories when executing the job, and not when preparing it.

also: Get CI to work on windows the easy way, for now.

Set directories for artifact dependencies in build script runtimes

Test remaining kinds of build-script runtime environment variables

Also
----
- Fix windows tests, the quick way.
- Try to fix windows assertions, and generalize them
- Fix second test for windows, hopefully

test for available library dependency in build scripts with lib = true

probably generally exclude all artifact dependencies with lib=false.

Pass renamed dep names along with unit deps to allow proper artifact env names

Test for selective bin:<name> syntax, as well as binaries with dashes

Test to assure dependency names are transformed correctly

assure advertised binaries and directories are actually present

This wouldn't be the case if dependencies are not setup correctly,
for instance.

Also
----
 - make it easier to see actual values even on failure

   This should help figure out why on CI something fails that works
   locally no matter what.
   Turns out this is a race condition, with my machine being on the good
   side of it so it doesn't show in testing. Fortunately it still can be
   reproduced and easily tested for.

 - refactor test; the race condition is still present though

 - Force CI to pass here by avoiding checks triggering race.

 - Fix windows build, maybe?

More tolerant is_file() checks to account for delay on CI

This _should_ help CI to test for the presence which is better than
not testing at all.

This appears to be needed as the output file isn't ready/present in time
for some reason.

The root cause of this issue is unknown, but it's definitely a race
as it rarely happens locally. When it happened, the file was always
present after the run.
Now we will learn if it is truly not present, ever, or if it's maybe
something very else.

Validate libs also don't see artifact dependencies as libraries with lib=false

Also
----

 - Add prelimiary test for validating build-time artifacts
 - Try to fix CI on gnu windows

   Which apparently generates paths similar to linux, but with .exe suffix.
   The current linux patterns should match that.

 - refactor

   Help sharing code across modules

allow rustc to use artifact dep environment variables, but…

…it needs some adjustments to actually setup the unit dependency graph
with artifacts as well.
Right now it will only setup dependencies for artifacts that are libs,
but not the artifacts themselves, completely ignoring them when they
are not libs.

Make artifact dependencies available in main loop

This is the commit message #2:
------------------------------

rough cut of support for artifact dependencies at build time…

…which unfortunately already shows that the binary it is supposed to
include is reproducibly not ready in time even though the path is
correct and it's present right after the run.

Could it be related to rmeta?

This is the commit message rust-lang#3:
------------------------------

Fix test expectations as failure is typical than the warning we had before…

…and add some tolerance to existing test to avoid occasional failures.

This doesn't change the issue that it also doens't work at all for
libraries, which is nicely reproducable and hopefully helps to fix
this issue.

This is the commit message rust-lang#4:
------------------------------

Probably the fix for the dependency issue in the scheduler

This means that bin() targets are now properly added to the job graph
to cause proper syncing, whereas previously apparently it would
still schedule binaries, but somehow consider them rmeta and thus
start their dependents too early, leading to races.

This is the commit message rust-lang#5:
------------------------------

Don't accidentally include non-gnu windows tests in gnu windows.

Support cargo doc and cargo check

The major changes here are…

- always compile artifacts in build mode, as we literally want the
  build output, always, which the dependent might rely on being present.
- share code between the rather similar looking paths for rustdoc and
  rustc.

Make artifact messages appear more in line with cargo by using backticks

Also: Add first test for static lib support in build scripts

build-scripts with support for cdylib and staticlib

 - Fix windows msvc build

   No need to speculate why the staticlib has hashes in the name even
   though nothing else.

staticlib and cdylib support for libraries

test staticlib and cdylibs for rustdoc as well.

Also catch a seemingly untested special case/warning about the lack
of linkable items, which probably shouldn't be an issue for artifacts
as they are not linkable in the traditional sense.

more useful test for 'cargo check'

`cargo check` isn't used very consistently in tests, so when we use it
we should be sure to actually try to use an artifact based feature
to gain some coverage.

verify that multiple versions are allowed for artifact deps as well.

also: remove redundant test

This is the commit message #2:
------------------------------

Properly choose which dependencies take part in artifact handling

Previously it would include them very generously without considering
the compatible dependency types.

This is the commit message rust-lang#3:
------------------------------

a more complex test which includes dev-dependencies

It also shows that doc-tests don't yet work as rustdoc is run outside of
the system into which we integrate right now.

It should be possible to write our environment variable configuration
in terms of this 'finished compilation' though, hopefully with
most code reused.

This is the commit message rust-lang#4:
------------------------------

A first stab at storing artifact environment variables for packages…

…however, it seems like the key for this isn't necessarily correct
under all circumstances. Maybe it should be something more specific,
don't know.

This is the commit message rust-lang#5:
------------------------------

Adjust key for identifying units to Metadata

This one is actually unique and feels much better.

This is the commit message rust-lang#6:
------------------------------

Attempt to make use of artifact environment information…

…but fail as the metadata won't match as the doctest unit is, of course,
its separate unit. Now I wonder if its possible to find the artifact
units in question that have the metadata.

Properly use metadata to use artifact environment variables in doctests

This is the commit message #2:
------------------------------

Add test for resolver = "2" and build dependencies

Interestingly the 'host-features' flag must be set (as is seemingly
documented in the flags documentation as well), even though I am not
quite sure if this is the 100% correct solution. Should it rather
have an entry with this flag being false in its map? Probably not…
but I am not quite certain.

This is the commit message rust-lang#3:
------------------------------

set most if not all tests to use resolver = "2"

This allows to keep it working with the most recent version while
allowing to quickly test with "1" as well (which thus far was working
fine).

All tests I could imagine (excluding target and profiles) are working now

Crossplatform tests now run on architecture aarm64 as well.

More stringent negative testing

Fix incorrect handling of dependency directory computation

Previously it would just 'hack' the deps-dir to become something very
different for artifacts.

This could easily be fixed by putting the logic for artifact output
directories into the right spot.

A test for cargo-tree to indicate artifacts aren't handled specifically

Assure build-scripts can't access artifacts at build time

Actual doc-tests with access to artifact env vars

All relevant parsing of `target = [..]`

Next step is to actually take it into consideration.

A failing test for adjusting the target for build script artifacts using --target

Check for unknown artifact target triple in a place that exists for a year

The first test showing that `target="target"` deps seemingly work

For now only tested for build scripts, but it won't be much different
for non-build dependencies.

build scripts accept custom targets unconditionally

Support target setting for non-build dependencies

This is the commit message #2:
------------------------------

Add doc-test cross compile related test

Even though there is no artifact code specific to doc testing, it's
worth to try testing it with different target settings to validate
it still works despite doc tests having some special caseing around
target settings.

This is the commit message rust-lang#3:
------------------------------

A test to validate profiles work as expected for build-deps and non-build deps

No change is required to make this work and artifact dependencies 'just work'
based on the typical rules of their non-artifact counterarts.

This is the commit message rust-lang#4:
------------------------------

Adjust `cargo metadata` to deal with artifact dependencies

This commit was squashed and there is probably more that changed.

This is the commit message rust-lang#5:
------------------------------

Show bin-only artifacts in "resolve" of metadata as well.

This is the commit message rust-lang#6:
------------------------------

minor refactoring during research for RFC-3176

This will soon need to return multiple extern-name/dep-name pairs.

This is the commit message rust-lang#7:
------------------------------

See if opt-level 3 works on win-msvc in basic profile test for artifacts

This is the same value as is used in the other test of the same name,
which certainly runs on windows.

This is the commit message rust-lang#8:
------------------------------

refactor

Assure the type for targets reflect that they cannot be the host target,
which removes a few unreachable!() expressions.

Put `root_unit_compile_kind` into `UnitFor`

Previously that wasn't done because of the unused `all_values()`
method which has now been deleted as its not being used anyomre.

This allows for the root unit compile kind to be passed as originally
intended, instead of working around the previous lack of extendability
of UnitFor due to ::all_values().

This is also the basis for better/correct feature handling once
feature resolution can be depending on the artifact target as well,
resulting in another extension to UnitFor for that matter.

Also
----

 - Fix ordering

   Previously the re-created target_mode was used due to the reordering
   in code, and who knows what kind of effects that might have
   (despite the test suite being OK with it).

   Let's put it back in place.

 - Deactivate test with filename collision on MSVC until RFC-3176 lands

Avoid clashes with binaries called 'artifact' by putting 'artifact/' into './deps/'

This commit addresses review comment rust-lang#9992 (comment)

Don't rely on operator precedence for boolean operations

Now it should be clear that no matter what the first term is,
if the unit is an artifact, we should enqueue it.

Replace boolean and `/*artifact*/ <bool>` with `IsArtifact::(Yes/No)`

fix `doc::doc_lib_false()` test

It broke due to major breakage in the way dependencies are calculated.

Now we differentiate between deps computation for docs and for building.

Avoid testing for doctest cross-compilation message

It seems to be present on my machine, but isn't on linux and it's
probably better to leave it out entirely and focus on the portions
of consecutive output that we want to see at least.

A test to validate features are unified across libraries and those in artifact deps in the same target

Allow aarch64 MacOS to crosscompile to an easily executable alternative target

That way more tests can run locally.

Support for feature resolution per target

The implementation is taken directly from RFC-3176 and notably lacks
the 'multidep' part.

Doing this definitely has the benefit of making entirely clear
'what is what' and helps to greatly reduce the scope of RFC-3176
when it's rebuilt based on the latest RF-3028, what we are implementing
right now.

Also
----
- A test which prooves that artifact deps with different target don't have a feature namespace yet

- Add a test to validate features are namespaced by target

  Previously it didn't work because it relies on resolver = "2".

- 'cargo metadata' test to see how artifact-deps are presented

- Missed an opportunity for using the newly introduced `PackageFeaturesKey`

- Use a HashMap to store name->value relations for artifact environment variables

  This is semantically closer to what's intended.

  also: Remove a by now misleading comment

Prevent resolver crash if `target = "target"` is encountered in non-build dependencies

A warning was emitted before, now we also apply a fix.

Previously the test didn't fail as it accidentally used the old
resolver, which now has been removed.

Abort in parsing stage if nightly flag is not set and 'artifact' is used

There is no good reason to delay errors to a later stage when code
tries to use artifacts via environment variables which are not present.

Change wording of warning message into what's expected for an error message

remove unnecessary `Result` in `collect()` call

Improve logic to warn if dependencie are ignored due to missing libraries

The improvement here is to trigger correctly if any dependency of a
crate is potentially a library, without having an actual library target
as part of the package specification.

Due to artifact dependencies it's also possible to have a dependency
to the same crate of the same version, hence the package name
isn't necessarily a unique name anymore. Now the name of the actual
dependency in the toml file is used to alleviate this.

Various small changes for readability and consistency

A failing test to validate artifacts work in published crates as well

Originally this should have been a test to see target acquisition works
but this more pressing issue surfaced instead.

Make artifacts known to the registry data (backwards compatible)

Now artifacts are serialized into the registry on publish (at least
if this code is actually used in the real crates-io registry) which
allows the resolve stage to contain artifact information.

This seems to be in line with the idea to provide cargo with all
information it needs to do package resolution without downloading
the actual manifest.

Pick up all artifact targets into target info once resolve data is available

Even though this works in the test at hand, it clearly shows there
is a cyclic dependency between the resolve and the target data.

In theory, one would have to repeat resolution until it settles
while avoiding cycles.

Maybe there is a better way.

Add `bindeps`/artifact dependencies to `unstsable.md` with examples

Fix tests

Various small improvements

Greatly simplify artifact environment propagation to commands

Remove all adjustments to cargo-metadata, but leave tests

The tests are to record the status quo with the current code
when artifact dependencies are present and assure the information
is not entirely non-sensical.

Revert "Make artifacts known to the registry data (backwards compatible)"

This reverts commit adc5f8ad04840af9fd06c964cfcdffb8c30769b0.

Ideally we are able to make it work without altering the registry
storage format. This could work if information from the package
set is added to the resolve information.

Enrich resolves information with additional information from downloaded manifests

Resolve information comes from the registry, and it's only as rich as
needed to know which packages take part in the build.

Artifacts, however, don't influence dependency resolution, hence it
shouldn't be part of it.

For artifact information being present nonetheless when it matters,
we port it back to the resolve graph where it will be needed later.

Collect 'forced-target' information from non-workspace members as well

This is needed as these targets aren't present in the registry and
thus can't be picked up by traversing non-workspce members.

The mechanism used to pick up artifact targets can also be used
to pick up these targets.

Remove unnecessary adjustment of doc test

refactor `State::deps()` to have filter; re-enable accidentally disabled test

The initial rebasing started out with a separted `deps_filtered()`
method to retain the original capabilities while minimizing the chance
for surprises. It turned out that the all changes combined in this PR
make heavy use of filtering capabilities to the point where
`deps(<without filter>)` was unused. This suggested that it's required
to keep it as is without a way to inline portions of it.

For the original change that triggered this rebase, see

bd45ac8

The fix originally made was reapplied by allowing to re-use the
required filter, but without inlining it.

Always error on invalid artifact setup, with or without enabled bindeps feature

Clarify how critical resolver code around artifact is working

Remove workaround in favor of deferring a proper implementation

See rust-lang#9992 (comment)
for reference and the TODO in the ignored test for more information.

truncate comments at 80-90c; cleanup

- remove unused method
- remove '-Z unstable-options'
- improve error message
- improve the way MSVC special cases are targetted in tests
- improve how executables are found on non MSVC

Avoid depending on output of rustc

There is cyclic dependency between rustc and cargo which makes it
impossible to adjust cargo's expectations on rustc without leaving
broken commits in rustc and cargo.

Add missing documentation

fix incorrect removal of non-artifact libs

This is also the first step towards cleaning up the filtering logic
which is still making some logic harder to understand than needs be.

The goal is to get it to be closer to what's currently on master.

Another test was added to have more safety regarding the overall
library inclusion logic.

inline `build_artifact_requirements_to_units()`

Simplify filtering

This adds a default filter to `state.deps(…)` making it similar to
what's currently in master, while creating another version of it
to allow setting a custom filter. This is needed as the default filter
won't allow build dependencies, which we need in this particular case.

`calc_artifact_deps(…)` now hard-codes the default filter which is
needed due to the use of `any` here:
https://github.com/rust-lang/cargo/blob/c0e6abe384c2c6282bdd631e2f2a3b092043e6c6/src/cargo/core/compiler/unit_dependencies.rs#L1119
.

Simplify filtering.
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Byron committed Feb 22, 2022
1 parent 86376c8 commit 7248f4b
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Showing 36 changed files with 4,330 additions and 411 deletions.
5 changes: 4 additions & 1 deletion crates/cargo-test-support/src/cross_compile.rs
Original file line number Diff line number Diff line change
Expand Up @@ -191,6 +191,7 @@ pub fn native_arch() -> &'static str {
.expect("Target triple has unexpected format")
{
"x86_64" => "x86_64",
"aarch64" => "aarch64",
"i686" => "x86",
_ => panic!("This test should be gated on cross_compile::disabled."),
}
Expand All @@ -200,7 +201,9 @@ pub fn native_arch() -> &'static str {
///
/// Only use this function on tests that check `cross_compile::disabled`.
pub fn alternate() -> &'static str {
if cfg!(target_os = "macos") {
if cfg!(all(target_os = "macos", target_arch = "aarch64")) {
"x86_64-apple-darwin"
} else if cfg!(target_os = "macos") {
"x86_64-apple-ios"
} else if cfg!(target_os = "linux") {
"i686-unknown-linux-gnu"
Expand Down
16 changes: 16 additions & 0 deletions crates/cargo-test-support/src/registry.rs
Original file line number Diff line number Diff line change
Expand Up @@ -331,6 +331,7 @@ pub struct Dependency {
name: String,
vers: String,
kind: String,
artifact: Option<(String, Option<String>)>,
target: Option<String>,
features: Vec<String>,
registry: Option<String>,
Expand Down Expand Up @@ -591,6 +592,7 @@ impl Package {
"features": dep.features,
"default_features": true,
"target": dep.target,
"artifact": dep.artifact,
"optional": dep.optional,
"kind": dep.kind,
"registry": registry_url,
Expand Down Expand Up @@ -744,6 +746,12 @@ impl Package {
"#,
target, kind, dep.name, dep.vers
));
if let Some((artifact, target)) = &dep.artifact {
manifest.push_str(&format!("artifact = \"{}\"\n", artifact));
if let Some(target) = &target {
manifest.push_str(&format!("target = \"{}\"\n", target))
}
}
if let Some(registry) = &dep.registry {
assert_eq!(registry, "alternative");
manifest.push_str(&format!("registry-index = \"{}\"", alt_registry_url()));
Expand Down Expand Up @@ -799,6 +807,7 @@ impl Dependency {
name: name.to_string(),
vers: vers.to_string(),
kind: "normal".to_string(),
artifact: None,
target: None,
features: Vec::new(),
package: None,
Expand All @@ -825,6 +834,13 @@ impl Dependency {
self
}

/// Change the artifact to be of the given kind, like "bin", or "staticlib",
/// along with a specific target triple if provided.
pub fn artifact(&mut self, kind: &str, target: Option<String>) -> &mut Self {
self.artifact = Some((kind.to_string(), target));
self
}

/// Adds `registry = $registry` to this dependency.
pub fn registry(&mut self, registry: &str) -> &mut Self {
self.registry = Some(registry.to_string());
Expand Down
57 changes: 57 additions & 0 deletions src/cargo/core/compiler/artifact.rs
Original file line number Diff line number Diff line change
@@ -0,0 +1,57 @@
/// Generate artifact information from unit dependencies for configuring the compiler environment.
use crate::core::compiler::unit_graph::UnitDep;
use crate::core::compiler::{Context, CrateType, FileFlavor, Unit};
use crate::core::TargetKind;
use crate::CargoResult;
use std::collections::HashMap;
use std::ffi::OsString;

/// Return all environment variables for the given unit-dependencies
/// if artifacts are present.
pub fn get_env(
cx: &Context<'_, '_>,
dependencies: &[UnitDep],
) -> CargoResult<HashMap<String, OsString>> {
let mut env = HashMap::new();
for unit_dep in dependencies.iter().filter(|d| d.unit.artifact.is_true()) {
for artifact_path in cx
.outputs(&unit_dep.unit)?
.iter()
.filter_map(|f| (f.flavor == FileFlavor::Normal).then(|| &f.path))
{
let artifact_type_upper = unit_artifact_type_name_upper(&unit_dep.unit);
let dep_name = unit_dep.dep_name.unwrap_or(unit_dep.unit.pkg.name());
let dep_name_upper = dep_name.to_uppercase().replace("-", "_");

let var = format!("CARGO_{}_DIR_{}", artifact_type_upper, dep_name_upper);
let path = artifact_path.parent().expect("parent dir for artifacts");
env.insert(var, path.to_owned().into());

let var = format!(
"CARGO_{}_FILE_{}_{}",
artifact_type_upper,
dep_name_upper,
unit_dep.unit.target.name()
);
env.insert(var, artifact_path.to_owned().into());

if unit_dep.unit.target.name() == dep_name.as_str() {
let var = format!("CARGO_{}_FILE_{}", artifact_type_upper, dep_name_upper,);
env.insert(var, artifact_path.to_owned().into());
}
}
}
Ok(env)
}

fn unit_artifact_type_name_upper(unit: &Unit) -> &'static str {
match unit.target.kind() {
TargetKind::Lib(kinds) => match kinds.as_slice() {
&[CrateType::Cdylib] => "CDYLIB",
&[CrateType::Staticlib] => "STATICLIB",
invalid => unreachable!("BUG: artifacts cannot be of type {:?}", invalid),
},
TargetKind::Bin => "BIN",
invalid => unreachable!("BUG: artifacts cannot be of type {:?}", invalid),
}
}
49 changes: 31 additions & 18 deletions src/cargo/core/compiler/build_context/target_info.rs
Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
use crate::core::compiler::{
BuildOutput, CompileKind, CompileMode, CompileTarget, Context, CrateType,
};
use crate::core::{Dependency, Target, TargetKind, Workspace};
use crate::core::{Dependency, Package, Target, TargetKind, Workspace};
use crate::util::config::{Config, StringList, TargetConfig};
use crate::util::{CargoResult, Rustc};
use anyhow::Context as _;
Expand Down Expand Up @@ -748,11 +748,17 @@ impl<'cfg> RustcTargetData<'cfg> {
// Get all kinds we currently know about.
//
// For now, targets can only ever come from the root workspace
// units as artifact dependencies are not a thing yet, so this
// correctly represents all the kinds that can happen. When we
// have artifact dependencies or other ways for targets to
// appear at places that are not the root units, we may have
// to revisit this.
// units and artifact dependencies, so this
// correctly represents all the kinds that can happen. When we have
// other ways for targets to appear at places that are not the root units,
// we may have to revisit this.
fn artifact_targets(package: &Package) -> impl Iterator<Item = CompileKind> + '_ {
package
.manifest()
.dependencies()
.iter()
.filter_map(|d| d.artifact()?.target()?.to_compile_kind())
}
let all_kinds = requested_kinds
.iter()
.copied()
Expand All @@ -761,25 +767,32 @@ impl<'cfg> RustcTargetData<'cfg> {
.default_kind()
.into_iter()
.chain(p.manifest().forced_kind())
.chain(artifact_targets(p))
}));
for kind in all_kinds {
if let CompileKind::Target(target) = kind {
if !res.target_config.contains_key(&target) {
res.target_config
.insert(target, res.config.target_cfg_triple(target.short_name())?);
}
if !res.target_info.contains_key(&target) {
res.target_info.insert(
target,
TargetInfo::new(res.config, &res.requested_kinds, &res.rustc, kind)?,
);
}
}
res.merge_compile_kind(kind)?;
}

Ok(res)
}

/// Insert `kind` into our `target_info` and `target_config` members if it isn't present yet.
fn merge_compile_kind(&mut self, kind: CompileKind) -> CargoResult<()> {
if let CompileKind::Target(target) = kind {
if !self.target_config.contains_key(&target) {
self.target_config
.insert(target, self.config.target_cfg_triple(target.short_name())?);
}
if !self.target_info.contains_key(&target) {
self.target_info.insert(
target,
TargetInfo::new(self.config, &self.requested_kinds, &self.rustc, kind)?,
);
}
}
Ok(())
}

/// Returns a "short" name for the given kind, suitable for keying off
/// configuration in Cargo or presenting to users.
pub fn short_name<'a>(&'a self, kind: &'a CompileKind) -> &'a str {
Expand Down
11 changes: 7 additions & 4 deletions src/cargo/core/compiler/compilation.rs
Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,9 @@ pub struct Doctest {
///
/// This is used for indexing [`Compilation::extra_env`].
pub script_meta: Option<Metadata>,

/// Environment variables to set in the rustdoc process.
pub env: HashMap<String, OsString>,
}

/// Information about the output of a unit.
Expand Down Expand Up @@ -190,14 +193,14 @@ impl<'cfg> Compilation<'cfg> {
) -> CargoResult<ProcessBuilder> {
let rustdoc = ProcessBuilder::new(&*self.config.rustdoc()?);
let cmd = fill_rustc_tool_env(rustdoc, unit);
let mut p = self.fill_env(cmd, &unit.pkg, script_meta, unit.kind, true)?;
unit.target.edition().cmd_edition_arg(&mut p);
let mut cmd = self.fill_env(cmd, &unit.pkg, script_meta, unit.kind, true)?;
unit.target.edition().cmd_edition_arg(&mut cmd);

for crate_type in unit.target.rustc_crate_types() {
p.arg("--crate-type").arg(crate_type.as_str());
cmd.arg("--crate-type").arg(crate_type.as_str());
}

Ok(p)
Ok(cmd)
}

/// Returns a [`ProcessBuilder`] appropriate for running a process for the
Expand Down
4 changes: 2 additions & 2 deletions src/cargo/core/compiler/compile_kind.rs
Original file line number Diff line number Diff line change
Expand Up @@ -158,8 +158,8 @@ impl CompileTarget {
/// Typically this is pretty much the same as `short_name`, but for the case
/// of JSON target files this will be a full canonicalized path name for the
/// current filesystem.
pub fn rustc_target(&self) -> &str {
&self.name
pub fn rustc_target(&self) -> InternedString {
self.name
}

/// Returns a "short" version of the target name suitable for usage within
Expand Down
33 changes: 32 additions & 1 deletion src/cargo/core/compiler/context/compilation_files.rs
Original file line number Diff line number Diff line change
Expand Up @@ -201,6 +201,8 @@ impl<'a, 'cfg: 'a> CompilationFiles<'a, 'cfg> {
self.build_script_dir(unit)
} else if unit.target.is_example() {
self.layout(unit.kind).examples().to_path_buf()
} else if unit.artifact.is_true() {
self.artifact_dir(unit)
} else {
self.deps_dir(unit).to_path_buf()
}
Expand Down Expand Up @@ -287,6 +289,30 @@ impl<'a, 'cfg: 'a> CompilationFiles<'a, 'cfg> {
self.layout(CompileKind::Host).build().join(dir)
}

/// Returns the directory for compiled artifacts files.
/// `/path/to/target/{debug,release}/deps/artifact/KIND/PKG-HASH`
fn artifact_dir(&self, unit: &Unit) -> PathBuf {
assert!(self.metas.contains_key(unit));
assert!(unit.artifact.is_true());
let dir = self.pkg_dir(unit);
let kind = match unit.target.kind() {
TargetKind::Bin => "bin",
TargetKind::Lib(lib_kinds) => match lib_kinds.as_slice() {
&[CrateType::Cdylib] => "cdylib",
&[CrateType::Staticlib] => "staticlib",
invalid => unreachable!(
"BUG: unexpected artifact library type(s): {:?} - these should have been split",
invalid
),
},
invalid => unreachable!(
"BUG: {:?} are not supposed to be used as artifacts",
invalid
),
};
self.layout(unit.kind).artifact().join(dir).join(kind)
}

/// Returns the directory where information about running a build script
/// is stored.
/// `/path/to/target/{debug,release}/build/PKG-HASH`
Expand Down Expand Up @@ -354,7 +380,12 @@ impl<'a, 'cfg: 'a> CompilationFiles<'a, 'cfg> {
if unit.mode != CompileMode::Build || file_type.flavor == FileFlavor::Rmeta {
return None;
}
// Only uplift:

// Artifact dependencies are never uplifted.
if unit.artifact.is_true() {
return None;
}

// - Binaries: The user always wants to see these, even if they are
// implicitly built (for example for integration tests).
// - dylibs: This ensures that the dynamic linker pulls in all the
Expand Down
5 changes: 3 additions & 2 deletions src/cargo/core/compiler/context/mod.rs
Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,7 @@ use std::path::{Path, PathBuf};
use std::sync::{Arc, Mutex};

use crate::core::compiler::compilation::{self, UnitOutput};
use crate::core::compiler::{self, Unit};
use crate::core::compiler::{self, artifact, Unit};
use crate::core::PackageId;
use crate::util::errors::CargoResult;
use crate::util::profile;
Expand Down Expand Up @@ -133,7 +133,7 @@ impl<'a, 'cfg> Context<'a, 'cfg> {

// We need to make sure that if there were any previous docs
// already compiled, they were compiled with the same Rustc version that we're currently
// using. Otherways we must remove the `doc/` folder and compile again forcing a rebuild.
// using. Otherwise we must remove the `doc/` folder and compile again forcing a rebuild.
//
// This is important because the `.js`/`.html` & `.css` files that are generated by Rustc don't have
// any versioning (See https://github.com/rust-lang/cargo/issues/8461).
Expand Down Expand Up @@ -262,6 +262,7 @@ impl<'a, 'cfg> Context<'a, 'cfg> {
unstable_opts,
linker: self.bcx.linker(unit.kind),
script_meta,
env: artifact::get_env(&self, self.unit_deps(unit))?,
});
}

Expand Down
6 changes: 6 additions & 0 deletions src/cargo/core/compiler/custom_build.rs
Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
use super::job::{Freshness, Job, Work};
use super::{fingerprint, Context, LinkType, Unit};
use crate::core::compiler::artifact;
use crate::core::compiler::context::Metadata;
use crate::core::compiler::job_queue::JobState;
use crate::core::{profiles::ProfileRoot, PackageId, Target};
Expand Down Expand Up @@ -203,6 +204,11 @@ fn build_work(cx: &mut Context<'_, '_>, unit: &Unit) -> CargoResult<Job> {
.env("RUSTDOC", &*bcx.config.rustdoc()?)
.inherit_jobserver(&cx.jobserver);

// Find all artifact dependencies and make their file and containing directory discoverable using environment variables.
for (var, value) in artifact::get_env(cx, dependencies)? {
cmd.env(&var, value);
}

if let Some(linker) = &bcx.target_data.target_config(unit.kind).linker {
cmd.env(
"RUSTC_LINKER",
Expand Down
3 changes: 2 additions & 1 deletion src/cargo/core/compiler/job_queue.rs
Original file line number Diff line number Diff line change
Expand Up @@ -395,7 +395,8 @@ impl<'cfg> JobQueue<'cfg> {
.filter(|dep| {
// Binaries aren't actually needed to *compile* tests, just to run
// them, so we don't include this dependency edge in the job graph.
!dep.unit.target.is_test() && !dep.unit.target.is_bin()
(!dep.unit.target.is_test() && !dep.unit.target.is_bin())
|| dep.unit.artifact.is_true()
})
.map(|dep| {
// Handle the case here where our `unit -> dep` dependency may
Expand Down
14 changes: 13 additions & 1 deletion src/cargo/core/compiler/layout.rs
Original file line number Diff line number Diff line change
Expand Up @@ -47,6 +47,9 @@
//! # prevent collisions. One notable exception is dynamic libraries.
//! deps/
//!
//! # Each artifact dependency gets in its own directory.
//! /artifact/$pkgname-$META/$kind
//!
//! # Root directory for all compiled examples.
//! examples/
//!
Expand Down Expand Up @@ -117,6 +120,8 @@ pub struct Layout {
deps: PathBuf,
/// The directory for build scripts: `$dest/build`
build: PathBuf,
/// The directory for artifacts, i.e. binaries, cdylibs, staticlibs: `$dest/deps/artifact`
artifact: PathBuf,
/// The directory for incremental files: `$dest/incremental`
incremental: PathBuf,
/// The directory for fingerprints: `$dest/.fingerprint`
Expand Down Expand Up @@ -164,10 +169,13 @@ impl Layout {
let lock = dest.open_rw(".cargo-lock", ws.config(), "build directory")?;
let root = root.into_path_unlocked();
let dest = dest.into_path_unlocked();
let deps = dest.join("deps");
let artifact = deps.join("artifact");

Ok(Layout {
deps: dest.join("deps"),
deps,
build: dest.join("build"),
artifact,
incremental: dest.join("incremental"),
fingerprint: dest.join(".fingerprint"),
examples: dest.join("examples"),
Expand Down Expand Up @@ -222,6 +230,10 @@ impl Layout {
pub fn build(&self) -> &Path {
&self.build
}
/// Fetch the artifact path.
pub fn artifact(&self) -> &Path {
&self.artifact
}
/// Create and return the tmp path.
pub fn prepare_tmp(&self) -> CargoResult<&Path> {
paths::create_dir_all(&self.tmp)?;
Expand Down
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