A Bash script to update Clippy's dependencies within the Rust repository

update_clippy_dependencies.sh

#! /bin/bash

set -euo pipefail

if [[ ! -d src/tools/clippy ]]; then
    echo "$0 must be run from the root of the rust repository." >&2
    exit 1 
fi

RUST="$PWD"

REMOVE_PATCH_VERSION='s/\(= "[[:digit:]]\+\.[[:digit:]]\+\)\.[[:digit:]]\+\("\)/\1\2/'

# Make cargo-upgrade think clippy is in its own workspace.
pushd "$(mktemp -d)"
ln -s "$RUST/src/tools/clippy"

# Run cargo-upgrade.
find -H clippy -name Cargo.toml -not -path "clippy/tests/*" \
    -exec cargo upgrade --workspace --manifest-path={} \;

# Remove patch versions.
find -H clippy -name Cargo.toml -not -path 'clippy/tests/*' \
    -exec sed -i "/^\[dependencies\]$/,$ $REMOVE_PATCH_VERSION" {} \;

popd

# Update lockfile.
cargo update -p clippy