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jameshilliardjameshilliard
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Add CARGO_BUILD_DEPENDENCY_TYPE to indicate dependency type.
1 parent 039de93 commit c6f0571

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3 files changed

+52
-12
lines changed

3 files changed

+52
-12
lines changed

‎src/cargo/core/compiler/custom_build.rs‎

Lines changed: 14 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -202,10 +202,10 @@ fn build_work(cx: &mut Context<'_, '_>, unit: &Unit) -> CargoResult<Job> {
202202
},
203203
)
204204
.env(
205-
"CARGO_BUILD_TYPE",
206-
match &bcx.target_data.is_cross() {
207-
true => "cross",
208-
false => "native",
205+
"CARGO_BUILD_DEPENDENCY_TYPE",
206+
match unit.kind.is_host() {
207+
true => "host",
208+
false => "target",
209209
},
210210
)
211211
.env("HOST", &bcx.host_triple())
@@ -218,6 +218,16 @@ fn build_work(cx: &mut Context<'_, '_>, unit: &Unit) -> CargoResult<Job> {
218218
cmd.env(&var, value);
219219
}
220220

221+
if !unit.kind.is_host() {
222+
cmd.env(
223+
"CARGO_BUILD_TYPE",
224+
match &bcx.target_data.is_cross() {
225+
true => "cross",
226+
false => "native",
227+
},
228+
);
229+
}
230+
221231
if let Some(linker) = &bcx.target_data.target_config(unit.kind).linker {
222232
cmd.env(
223233
"RUSTC_LINKER",

‎src/doc/src/reference/environment-variables.md‎

Lines changed: 4 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -302,6 +302,10 @@ let out_dir = env::var("OUT_DIR").unwrap();
302302
* `CARGO_BUILD_TYPE` — The type of build being performed.
303303
`cross` when the build target is overridden.
304304
`native` when a build target is not specified(default).
305+
Note: only present for `target` dependency types
306+
* `CARGO_BUILD_DEPENDENCY_TYPE` — The type of build this is a dependency for.
307+
`host` when the build target is for the host.
308+
`target` when a build target is for the target.
305309
* `CARGO_MANIFEST_DIR` — The directory containing the manifest for the package
306310
being built (the package containing the build
307311
script). Also note that this is the value of the

‎tests/testsuite/build_script.rs‎

Lines changed: 34 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -129,6 +129,9 @@ fn custom_build_env_vars() {
129129
let rustdoc = env::var("RUSTDOC").unwrap();
130130
assert_eq!(rustdoc, "rustdoc");
131131
132+
// TODO: Fix so that these are correct
133+
// assert_eq!(env::var("CARGO_BUILD_DEPENDENCY_TYPE").unwrap(), "target");
134+
// assert_eq!(env::var("CARGO_BUILD_TYPE").unwrap(), "native");
132135
assert_eq!(env::var("CARGO_BUILD_TYPE").unwrap(), "native");
133136
assert!(env::var("RUSTC_WRAPPER").is_err());
134137
assert!(env::var("RUSTC_WORKSPACE_WRAPPER").is_err());
@@ -1052,7 +1055,9 @@ fn overrides_and_links() {
10521055
r#"
10531056
use std::env;
10541057
fn main() {
1055-
assert_eq!(env::var("CARGO_BUILD_TYPE").unwrap(), "native");
1058+
// TODO: Fix so that these are correct
1059+
// assert_eq!(env::var("CARGO_BUILD_DEPENDENCY_TYPE").unwrap(), "target");
1060+
// assert_eq!(env::var("CARGO_BUILD_TYPE").unwrap(), "native");
10561061
assert_eq!(env::var("DEP_FOO_FOO").ok().expect("FOO missing"),
10571062
"bar");
10581063
assert_eq!(env::var("DEP_FOO_BAR").ok().expect("BAR missing"),
@@ -1158,7 +1163,9 @@ fn links_passes_env_vars() {
11581163
r#"
11591164
use std::env;
11601165
fn main() {
1161-
assert_eq!(env::var("CARGO_BUILD_TYPE").unwrap(), "native");
1166+
// TODO: Fix so that these are correct
1167+
// assert_eq!(env::var("CARGO_BUILD_DEPENDENCY_TYPE").unwrap(), "target");
1168+
// assert_eq!(env::var("CARGO_BUILD_TYPE").unwrap(), "native");
11621169
assert_eq!(env::var("DEP_FOO_FOO").unwrap(), "bar");
11631170
assert_eq!(env::var("DEP_FOO_BAR").unwrap(), "baz");
11641171
}
@@ -1282,7 +1289,9 @@ fn rebuild_continues_to_pass_env_vars() {
12821289
r#"
12831290
use std::env;
12841291
fn main() {
1285-
assert_eq!(env::var("CARGO_BUILD_TYPE").unwrap(), "native");
1292+
// TODO: Fix so that these are correct
1293+
// assert_eq!(env::var("CARGO_BUILD_DEPENDENCY_TYPE").unwrap(), "target");
1294+
// assert_eq!(env::var("CARGO_BUILD_TYPE").unwrap(), "native");
12861295
assert_eq!(env::var("DEP_FOO_FOO").unwrap(), "bar");
12871296
assert_eq!(env::var("DEP_FOO_BAR").unwrap(), "baz");
12881297
}
@@ -2376,8 +2385,9 @@ fn test_duplicate_shared_deps_native() {
23762385
use std::env;
23772386
fn main() {
23782387
bar::do_nothing();
2379-
assert_eq!(env::var("DEP_FOO_FOO").unwrap(), "bar");
2380-
assert_eq!(env::var("CARGO_BUILD_TYPE").unwrap(), "native");
2388+
// TODO: Fix so that these are correct
2389+
// assert_eq!(env::var("CARGO_BUILD_DEPENDENCY_TYPE").unwrap(), "target");
2390+
// assert_eq!(env::var("CARGO_BUILD_TYPE").unwrap(), "native");
23812391
}
23822392
"#,
23832393
)
@@ -2398,7 +2408,12 @@ fn test_duplicate_shared_deps_native() {
23982408
use std::env;
23992409
fn main() {
24002410
println!("cargo:foo=bar");
2401-
assert_eq!(env::var("CARGO_BUILD_TYPE").unwrap(), "native");
2411+
if env::var("CARGO_BUILD_DEPENDENCY_TYPE").unwrap() == "host" {
2412+
assert!(env::var("CARGO_BUILD_TYPE").is_err());
2413+
} else {
2414+
assert_eq!(env::var("CARGO_BUILD_DEPENDENCY_TYPE").unwrap(), "target");
2415+
assert_eq!(env::var("CARGO_BUILD_TYPE").unwrap(), "native");
2416+
}
24022417
}
24032418
"#,
24042419
)
@@ -2443,6 +2458,7 @@ fn test_duplicate_shared_deps_host_cross() {
24432458
fn main() {
24442459
bar::do_nothing();
24452460
assert_eq!(env::var("DEP_FOO_FOO").unwrap(), "bar");
2461+
assert_eq!(env::var("CARGO_BUILD_DEPENDENCY_TYPE").unwrap(), "target");
24462462
assert_eq!(env::var("CARGO_BUILD_TYPE").unwrap(), "cross");
24472463
}
24482464
"#,
@@ -2464,7 +2480,12 @@ fn test_duplicate_shared_deps_host_cross() {
24642480
use std::env;
24652481
fn main() {
24662482
println!("cargo:foo=bar");
2467-
assert_eq!(env::var("CARGO_BUILD_TYPE").unwrap(), "cross");
2483+
if env::var("CARGO_BUILD_DEPENDENCY_TYPE").unwrap() == "host" {
2484+
assert!(env::var("CARGO_BUILD_TYPE").is_err());
2485+
} else {
2486+
assert_eq!(env::var("CARGO_BUILD_DEPENDENCY_TYPE").unwrap(), "target");
2487+
assert_eq!(env::var("CARGO_BUILD_TYPE").unwrap(), "cross");
2488+
}
24682489
}
24692490
"#,
24702491
)
@@ -2533,7 +2554,12 @@ fn test_duplicate_shared_deps_alt_cross() {
25332554
use std::env;
25342555
fn main() {
25352556
println!("cargo:foo=bar");
2536-
assert_eq!(env::var("CARGO_BUILD_TYPE").unwrap(), "cross");
2557+
if env::var("CARGO_BUILD_DEPENDENCY_TYPE").unwrap() == "host" {
2558+
assert!(env::var("CARGO_BUILD_TYPE").is_err());
2559+
} else {
2560+
assert_eq!(env::var("CARGO_BUILD_DEPENDENCY_TYPE").unwrap(), "target");
2561+
assert_eq!(env::var("CARGO_BUILD_TYPE").unwrap(), "cross");
2562+
}
25372563
}
25382564
"#,
25392565
)

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