nushell/coverage-local.nu
Darren Schroeder d17c970f8c
update code coversage script to work better with windows (#8141)
# Description

This PR updates the code coverage script to help it work better on
Windows. The main changes here are to give you some progress outputs and
to enable `cargo llvm-cov show-env | from toml` to work better since the
toml spec says these literal strings should be single quoted vs double
quoted.

Closed #8139

# User-Facing Changes



# Tests + Formatting

Don't forget to add tests that cover your changes.

Make sure you've run and fixed any issues with these commands:

- `cargo fmt --all -- --check` to check standard code formatting (`cargo
fmt --all` applies these changes)
- `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used -A
clippy::needless_collect` to check that you're using the standard code
style
- `cargo test --workspace` to check that all tests pass

# After Submitting

If your PR had any user-facing changes, update [the
documentation](https://github.com/nushell/nushell.github.io) after the
PR is merged, if necessary. This will help us keep the docs up to date.
2023-02-20 19:21:41 +00:00

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#!/usr/bin/env nu
let start = (date now)
# Script to generate coverage locally
#
# Output: `lcov.info` file
#
# Relies on `cargo-llvm-cov`. Install via `cargo install cargo-llvm-cov`
# https://github.com/taiki-e/cargo-llvm-cov
# You probably have to run `cargo llvm-cov clean` once manually,
# as you have to confirm to install additional tooling for your rustup toolchain.
# Else the script might stall waiting for your `y<ENTER>`
# Some of the internal tests rely on the exact cargo profile
# (This is somewhat criminal itself)
# but we have to signal to the tests that we use the `ci` `--profile`
let-env NUSHELL_CARGO_TARGET = "ci"
# Manual gathering of coverage to catch invocation of the `nu` binary.
# This is relevant for tests using the `nu!` macro from `nu-test-support`
# see: https://github.com/taiki-e/cargo-llvm-cov#get-coverage-of-external-tests
print "Setting up environment variables for coverage"
# Enable LLVM coverage tracking through environment variables
# show env outputs .ini/.toml style description of the variables
# In order to use from toml, we need to make sure our string literals are single quoted
# This is especially important when running on Windows since "C:\blah" is treated as an escape
cargo llvm-cov show-env | str replace (char dq) (char sq) -a | from toml | load-env
print "Cleaning up coverage data"
cargo llvm-cov clean --workspace
print "Building with workspace and profile=ci"
# Apparently we need to explicitly build the necessary parts
# using the `--profile=ci` is basically `debug` build with unnecessary symbols stripped
# leads to smaller binaries and potential savings when compiling and running
cargo build --workspace --profile=ci
print "Running tests with --workspace and profile=ci"
cargo test --workspace --profile=ci
# You need to provide the used profile to find the raw data
print "Generating coverage report as lcov.info"
cargo llvm-cov report --lcov --output-path lcov.info --profile=ci
let end = (date now)
$"Coverage generation took ($end - $start)."
# To display the coverage in your editor see:
#
# - https://marketplace.visualstudio.com/items?itemName=ryanluker.vscode-coverage-gutters
# - https://github.com/umaumax/vim-lcov
# - https://github.com/andythigpen/nvim-coverage (probably needs some additional config)