rust-itertools: my git hooks to avoid most CI failures

post-checkout

#!/bin/sh

# Automatically sync the base branch of the remote fork and fetch it.

fork=Philippe-Cholet/itertools
base_branch=master
branch="$(git rev-parse --abbrev-ref HEAD)"
if [ "$branch" = "$base_branch" ]; then
	gh repo sync $fork -b $base_branch
	git fetch origin $base_branch
fi

pre-commit

#!/bin/sh

# To run without committing (alias recommanded):	git hook run pre-commit

base_branch=master

assert () {
	local failure_message="$1"
	shift	# The remaining arguments make the command to execute
	"$@"	# Run the command
	local return_code=$?
	[ $return_code -eq 0 ] && return 0
	echo "$failure_message" >&2
	exit $return_code
}
assert_file_contains () {
	assert "Missing in $1: $2"						grep --quiet "$2" "$1"
}

branch="$(git rev-parse --abbrev-ref HEAD)"
assert "Do NOT commit directly to $base_branch!"	[ "$branch" != "$base_branch" ]

# With "short", it only prints filepaths of unformatted files.
assert "rustfmt check failed"						cargo fmt --check --message-format=short
# "quiet" remove cargo logs but the output remains large.
assert "check failed (default)"						cargo check --quiet
assert "check failed (no feature)"					cargo check --quiet --no-default-features
assert "check failed (only use_alloc)"				cargo check --quiet --no-default-features --features=use_alloc
assert "clippy failed (all features/targets)"		cargo clippy --quiet --all-features --all-targets # -- -A unknown_lints

cargo_json="$(cargo metadata --no-deps --format-version=1)"
pkg_version="$(echo "$cargo_json" | jq --raw-output '.packages[0].version')"
pkg_rust_version="$(echo "$cargo_json" | jq --raw-output '.packages[0].rust_version')"

assert_file_contains 'README.md'					"itertools = \"$pkg_version\""
assert_file_contains '.github/workflows/ci.yml'		"toolchain: $pkg_rust_version"
assert_file_contains 'src/lib.rs'					"//! This version of itertools requires Rust $pkg_rust_version or later."

# rustup install $pkg_rust_version --profile minimal
assert "MSRV check failed"							cargo +$pkg_rust_version check --quiet

pre-push

#!/bin/sh

# Same as pre-commit but warnings are not allowed anymore.

if ! RUSTFLAGS=-Dwarnings git hook run pre-commit
then
	echo "Warnings are not allowed in CI"
	exit 1
fi

# or maybe directly in pre-commit	export RUSTFLAGS=-Dwarnings