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Diffstat (limited to 'tests/testsuite/build_script_env.rs')
| -rw-r--r-- | tests/testsuite/build_script_env.rs | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/tests/testsuite/build_script_env.rs b/tests/testsuite/build_script_env.rs new file mode 100644 index 0000000..6ad4ab9 --- /dev/null +++ b/tests/testsuite/build_script_env.rs @@ -0,0 +1,241 @@ +//! 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(); +} |