xtask: add coverage command #2067
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mejrs
approved these changes
Dec 26, 2021
| @@ -119,7 +119,8 @@ harness = false | |||
| members = [ | |||
| "pyo3-macros", | |||
| "pyo3-macros-backend", | |||
| "examples" | |||
| "examples", | |||
| "xtask" | |||
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We don't necessarily need to name this "xtask". I don't have a motivation for changing it. But we could.
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Yeah, I don't personally love the name xtask but I do like that it's a documented "approach" (https://github.com/matklad/cargo-xtask), so without good motivation I don't feel a need to change it.
For example I'd personally enjoy the alias being called cargo run-script. There's nothing stopping us adding a couple extra aliases that all do the same later, if we wanted ;)
xtask/Cargo.toml
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| [dependencies] | ||
| anyhow = "1.0.51" | ||
| clap = { version = "3.0.0-rc.7", features = ["derive"] } |
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Does this add clap to pyo3's dependency tree? If so can we avoid that?
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I don't believe it does, no. This is an excerpt of Cargo.lock from a test project built against this branch:
[[package]]
name = "pyo3"
version = "0.15.1"
dependencies = [
"cfg-if",
"indoc",
"libc",
"num-bigint",
"parking_lot",
"paste",
"pyo3-build-config",
"pyo3-macros",
"unindent",
]
So clap hasn't come through as a dependency here.
|
Great! I've tidied this up a bit and added If CI passes I'll merge this now; I'll follow up on the coverage command improvements later once the |
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115: cli: add show-env subcommand r=taiki-e a=davidhewitt Implements the `show-env` suggestion from #93 (comment) An example output: ``` $ cargo llvm-cov show-env RUSTFLAGS=" -Z instrument-coverage --remap-path-prefix /home/david/dev/pyo3/= --cfg coverage --cfg trybuild_no_target" LLVM_PROFILE_FILE="/home/david/dev/pyo3/target/llvm-cov-target/pyo3-%m.profraw" CARGO_INCREMENTAL="0" CARGO_TARGET_DIR="/home/david/dev/pyo3/target/llvm-cov-target" ``` After exporting these vars, I had a go at building pyo3's `cdylib` examples and then running them with `pytest`. Pleased to see that I do get profile output in the expected location: ``` $ ls target/llvm-cov-target/ CACHEDIR.TAG pyo3-6622988374613674511_0.profraw debug pyo3-8390305564713967804_0.profraw pyo3-10144924340354712083_0.profraw pyo3-8655209440434687052_0.profraw pyo3-12448306348928428713_0.profraw pyo3-9115749969700858718_0.profraw pyo3-13212718739740305352_0.profraw pyo3-9296542518232051450_0.profraw pyo3-17208771140764127027_0.profraw pyo3.profdata pyo3-40338836728015828_0.profraw release pyo3-5761173678925874245_0.profraw wheels pyo3-6135639819960792837_0.profraw ``` There's still some pain points: 1. I need to unset `CARGO_TARGET_DIR` before attempting to run `cargo llvm-cov` command, or I get crashes because it tries to append `llvm-cov-target` for a second time: ``` $ cargo llvm-cov --no-run --summary-only error: no input files specified. See llvm-profdata merge -help error: failed to merge profile data: process didn't exit successfully: `/home/david/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/bin/llvm-profdata merge -sparse -o /home/david/dev/pyo3/target/llvm-cov-target/llvm-cov-target/pyo3.profdata` (exit status: 1) ``` 2. After unsetting `CARGO_TARGET_DIR`, I still get a failure to generate the report. I suspect this is because `cargo-llvm-cov` is not finding and passing the `cdylib` outputs to `llvm-cov report`? ``` $ cargo llvm-cov --no-run --summary-only --verbose Running `/home/david/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/bin/llvm-profdata merge -sparse /home/david/dev/pyo3/target/llvm-cov-target/pyo3-10144924340354712083_0.profraw /home/david/dev/pyo3/target/llvm-cov-target/pyo3-12448306348928428713_0.profraw /home/david/dev/pyo3/target/llvm-cov-target/pyo3-13212718739740305352_0.profraw /home/david/dev/pyo3/target/llvm-cov-target/pyo3-17208771140764127027_0.profraw /home/david/dev/pyo3/target/llvm-cov-target/pyo3-40338836728015828_0.profraw /home/david/dev/pyo3/target/llvm-cov-target/pyo3-5761173678925874245_0.profraw /home/david/dev/pyo3/target/llvm-cov-target/pyo3-6135639819960792837_0.profraw /home/david/dev/pyo3/target/llvm-cov-target/pyo3-6622988374613674511_0.profraw /home/david/dev/pyo3/target/llvm-cov-target/pyo3-8390305564713967804_0.profraw /home/david/dev/pyo3/target/llvm-cov-target/pyo3-8655209440434687052_0.profraw /home/david/dev/pyo3/target/llvm-cov-target/pyo3-9115749969700858718_0.profraw /home/david/dev/pyo3/target/llvm-cov-target/pyo3-9296542518232051450_0.profraw -o /home/david/dev/pyo3/target/llvm-cov-target/pyo3.profdata` Running `/home/david/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/bin/llvm-cov report -instr-profile=/home/david/dev/pyo3/target/llvm-cov-target/pyo3.profdata -ignore-filename-regex '(^|/)(rustc/[0-9a-f]+|(\.)?cargo/(registry|git)|(\.)?rustup/toolchains|tests|examples|benches|target/llvm-cov-target)/|^/home/david/|^pyo3-macros/|^pyo3-macros-backend/|^pyo3-build-config/|^examples/|^xtask/'` No filenames specified! error: failed to generate report: process didn't exit successfully: `/home/david/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/bin/llvm-cov report -instr-profile=/home/david/dev/pyo3/target/llvm-cov-target/pyo3.profdata -ignore-filename-regex '(^|/)(rustc/[0-9a-f]+|(\.)?cargo/(registry|git)|(\.)?rustup/toolchains|tests|examples|benches|target/llvm-cov-target)/|^/home/david/|^pyo3-macros/|^pyo3-macros-backend/|^pyo3-build-config/|^examples/|^xtask/'` (exit status: 1) ``` If you're interested, you can see the companion PyO3 at PyO3/pyo3#2067 Co-authored-by: David Hewitt <[email protected]> Co-authored-by: Taiki Endo <[email protected]>
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This is a bit of an experiment to add a
cargo xtask coveragealias.Ultimately this will re-implement the coverage recipe in ci. I also was playing around with adding coverage from out examples and python tests. It doesn't seem to be working quite yet; needs upstream support in
cargo-llvm-covwhich I'm still trying to figure out.