cargo test does not export CARGO_CFG_TEST for build.rs scripts
#4789
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This is currently intentional behavior because build scripts don't have a "I'm running tests" mode. That would require a test build script most likely and it's an unimplemented feature so far. |
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As there hasn't been any activity here in over 6 months I've marked this as stale and if no further activity happens for 7 days I will close it. I'm a bot so this may be in error! If this issue should remain open, could someone (the author, a team member, or any interested party) please comment to that effect? The team would be especially grateful if such a comment included details such as:
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As I didn't see any updates in 30 days I'm going to close this. Please see the previous comment for more information! |
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@alexcrichton why would a separate test build script be needed and not just allow for |
rust-lang/cargo#4789) so always set the env variable changers
They weren't running for two reasons. 1. I was annotating them with `#[cfg(tests)]` instead of `#[cfg(test)]`. 2. Build scripts don't know about test mode: rust-lang/cargo#4789
* Fix generated tests They weren't running for two reasons. 1. I was annotating them with `#[cfg(tests)]` instead of `#[cfg(test)]`. 2. Build scripts don't know about test mode: rust-lang/cargo#4789 * Appease clippy while keeping build working on Rust 1.22
e here is fairly simple – I need to build a shared library to be used for tests, however it is also important to me that this library is not built when people are compiling the library for regular use.
rustc --test --print=cfgdoes output thetestconfiguration variable, however whencargo testis run, the build script does not receive this variable in form ofCARGO_CFG_TEST.Caveat is that rerunning the build script for both test and non-test would potentially re-run expensive build.rs operations by default, however that seems easily remedied by requiring people to print out a
cargo:rerun-if-env-changed=CARGO_CFG_TEST(it would become the first exception to the list of environment variables set by cargo and tracked by default).The text was updated successfully, but these errors were encountered: