nushell/scripts/coverage-local.sh
Skyler Hawthorne 9a4dad6ca1
Fix unit tests on Android (#10224)
# Description

* The path to the binaries for tests is slightly incorrect. It is
missing the build target when it is set with the `CARGO_BUILD_TARGET`
environment variable. For example, when `CARGO_BUILD_TARGET` is set to
`aarch64-linux-android`, the path to the `nu` binary is:

  `./target/aarch64-linux-android/debug/nu`

  rather than

  `./target/debug/nu`

This is common on Termux since the default target that rustc detects can
cause problems on some projects, such as [python's `cryptography`
package](https://github.com/pyca/cryptography/issues/7248).
  
This technically isn't a problem specific to Android, but is more likely
to happen on Android due to the latter.
* Additionally, the existing variable named `NUSHELL_CARGO_TARGET` is in
fact the profile, not the build target, so this was renamed to
`NUSHELL_CARGO_PROFILE`. This change is included because without the
rename, the build system would be using `CARGO_BUILD_TARGET` for the
build target and `NUSHELL_CARGO_TARGET` for the build profile, which is
confusing.
* `std path add` tests were missing `android` test

# User-Facing Changes

For those who would like to build nushell on Termux, the unit tests will
pass now.
2023-09-05 20:17:34 +12:00

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#!/usr/bin/env bash
DIR=$(readlink -f $(dirname "${BASH_SOURCE[0]}"))
REPO_ROOT=$(dirname $DIR)
# 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`
export NUSHELL_CARGO_PROFILE=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
(
cd $REPO_ROOT
# Enable LLVM coverage tracking through environment variables
source <(cargo llvm-cov show-env --export-prefix)
cargo llvm-cov clean --workspace
# 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
cargo test --workspace --profile=ci
# You need to provide the used profile to find the raw data
cargo llvm-cov report --lcov --output-path lcov.info --profile=ci
)
# 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)