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|
//! Tests for build.rs rerun-if-env-changed and rustc-env
use cargo_test_support::basic_manifest;
use cargo_test_support::project;
use cargo_test_support::sleep_ms;
#[cargo_test]
fn rerun_if_env_changes() {
let p = project()
.file("src/main.rs", "fn main() {}")
.file(
"build.rs",
r#"
fn main() {
println!("cargo:rerun-if-env-changed=FOO");
}
"#,
)
.build();
p.cargo("check")
.with_stderr(
"\
[COMPILING] foo v0.0.1 ([..])
[FINISHED] [..]
",
)
.run();
p.cargo("check")
.env("FOO", "bar")
.with_stderr(
"\
[COMPILING] foo v0.0.1 ([..])
[FINISHED] [..]
",
)
.run();
p.cargo("check")
.env("FOO", "baz")
.with_stderr(
"\
[COMPILING] foo v0.0.1 ([..])
[FINISHED] [..]
",
)
.run();
p.cargo("check")
.env("FOO", "baz")
.with_stderr("[FINISHED] [..]")
.run();
p.cargo("check")
.with_stderr(
"\
[COMPILING] foo v0.0.1 ([..])
[FINISHED] [..]
",
)
.run();
}
#[cargo_test]
fn rerun_if_env_or_file_changes() {
let p = project()
.file("src/main.rs", "fn main() {}")
.file(
"build.rs",
r#"
fn main() {
println!("cargo:rerun-if-env-changed=FOO");
println!("cargo:rerun-if-changed=foo");
}
"#,
)
.file("foo", "")
.build();
p.cargo("check")
.with_stderr(
"\
[COMPILING] foo v0.0.1 ([..])
[FINISHED] [..]
",
)
.run();
p.cargo("check")
.env("FOO", "bar")
.with_stderr(
"\
[COMPILING] foo v0.0.1 ([..])
[FINISHED] [..]
",
)
.run();
p.cargo("check")
.env("FOO", "bar")
.with_stderr("[FINISHED] [..]")
.run();
sleep_ms(1000);
p.change_file("foo", "");
p.cargo("check")
.env("FOO", "bar")
.with_stderr(
"\
[COMPILING] foo v0.0.1 ([..])
[FINISHED] [..]
",
)
.run();
}
#[cargo_test]
fn rustc_bootstrap() {
let build_rs = r#"
fn main() {
println!("cargo:rustc-env=RUSTC_BOOTSTRAP=1");
}
"#;
let p = project()
.file("Cargo.toml", &basic_manifest("has-dashes", "0.0.1"))
.file("src/lib.rs", "#![feature(rustc_attrs)]")
.file("build.rs", build_rs)
.build();
// RUSTC_BOOTSTRAP unset on stable should error
p.cargo("check")
.with_stderr_contains("error: Cannot set `RUSTC_BOOTSTRAP=1` [..]")
.with_stderr_contains(
"help: [..] set the environment variable `RUSTC_BOOTSTRAP=has_dashes` [..]",
)
.with_status(101)
.run();
// nightly should warn whether or not RUSTC_BOOTSTRAP is set
p.cargo("check")
.masquerade_as_nightly_cargo(&["RUSTC_BOOTSTRAP"])
// NOTE: uses RUSTC_BOOTSTRAP so it will be propagated to rustc
// (this matters when tests are being run with a beta or stable cargo)
.env("RUSTC_BOOTSTRAP", "1")
.with_stderr_contains("warning: Cannot set `RUSTC_BOOTSTRAP=1` [..]")
.run();
// RUSTC_BOOTSTRAP set to the name of the library should warn
p.cargo("check")
.env("RUSTC_BOOTSTRAP", "has_dashes")
.with_stderr_contains("warning: Cannot set `RUSTC_BOOTSTRAP=1` [..]")
.run();
// RUSTC_BOOTSTRAP set to some random value should error
p.cargo("check")
.env("RUSTC_BOOTSTRAP", "bar")
.with_stderr_contains("error: Cannot set `RUSTC_BOOTSTRAP=1` [..]")
.with_stderr_contains(
"help: [..] set the environment variable `RUSTC_BOOTSTRAP=has_dashes` [..]",
)
.with_status(101)
.run();
// Tests for binaries instead of libraries
let p = project()
.file("Cargo.toml", &basic_manifest("foo", "0.0.1"))
.file("src/main.rs", "#![feature(rustc_attrs)] fn main() {}")
.file("build.rs", build_rs)
.build();
// nightly should warn when there's no library whether or not RUSTC_BOOTSTRAP is set
p.cargo("check")
.masquerade_as_nightly_cargo(&["RUSTC_BOOTSTRAP"])
// NOTE: uses RUSTC_BOOTSTRAP so it will be propagated to rustc
// (this matters when tests are being run with a beta or stable cargo)
.env("RUSTC_BOOTSTRAP", "1")
.with_stderr_contains("warning: Cannot set `RUSTC_BOOTSTRAP=1` [..]")
.run();
// RUSTC_BOOTSTRAP conditionally set when there's no library should error (regardless of the value)
p.cargo("check")
.env("RUSTC_BOOTSTRAP", "foo")
.with_stderr_contains("error: Cannot set `RUSTC_BOOTSTRAP=1` [..]")
.with_stderr_contains("help: [..] set the environment variable `RUSTC_BOOTSTRAP=1` [..]")
.with_status(101)
.run();
}
#[cargo_test]
#[cfg(target_arch = "x86_64")]
fn build_script_sees_cfg_target_feature() {
let build_rs = r#"
fn main() {
let cfg = std::env::var("CARGO_CFG_TARGET_FEATURE").unwrap();
eprintln!("CARGO_CFG_TARGET_FEATURE={cfg}");
}
"#;
let configs = [
r#"
[build]
rustflags = ["-Ctarget-feature=+sse4.1,+sse4.2"]
"#,
r#"
[target.'cfg(target_arch = "x86_64")']
rustflags = ["-Ctarget-feature=+sse4.1,+sse4.2"]
"#,
];
for config in configs {
let p = project()
.file(".cargo/config.toml", config)
.file("src/lib.rs", r#""#)
.file("build.rs", build_rs)
.build();
p.cargo("check -vv")
.with_stderr_contains("[foo 0.0.1] CARGO_CFG_TARGET_FEATURE=[..]sse4.2[..]")
.with_stderr_contains("[..]-Ctarget-feature=[..]+sse4.2[..]")
.run();
}
}
/// In this test, the cfg is self-contradictory. There's no *right* answer as to
/// what the value of `RUSTFLAGS` should be in this case. We chose to give a
/// warning. However, no matter what we do, it's important that build scripts
/// and rustc see a consistent picture
#[cargo_test]
fn cfg_paradox() {
let build_rs = r#"
fn main() {
let cfg = std::env::var("CARGO_CFG_BERTRAND").is_ok();
eprintln!("cfg!(bertrand)={cfg}");
}
"#;
let config = r#"
[target.'cfg(not(bertrand))']
rustflags = ["--cfg=bertrand"]
"#;
let p = project()
.file(".cargo/config.toml", config)
.file("src/lib.rs", r#""#)
.file("build.rs", build_rs)
.build();
p.cargo("check -vv")
.with_stderr_contains("[WARNING] non-trivial mutual dependency between target-specific configuration and RUSTFLAGS")
.with_stderr_contains("[foo 0.0.1] cfg!(bertrand)=true")
.with_stderr_contains("[..]--cfg=bertrand[..]")
.run();
}
|
