Fix tools/check_wildcard_imports.sh

Makefile

@@ -45,7 +45,7 @@ ci-travis:
 	@printf "$$(tput bold)* CI: Formatting *$$(tput sgr0)\n"
 	@printf "$$(tput bold)******************$$(tput sgr0)\n"
 	@CI=true ./tools/run_cargo_fmt.sh diff
-	#@./tools/check_wildcard_imports.sh
+	@./tools/check_wildcard_imports.sh
 	@printf "$$(tput bold)*************$$(tput sgr0)\n"
 	@printf "$$(tput bold)* CI: Tools *$$(tput sgr0)\n"
 	@printf "$$(tput bold)*************$$(tput sgr0)\n"

tools/check_wildcard_imports.sh

@@ -21,9 +21,11 @@ set -e
 
 # Clippy doesn't have an option for this, so do it manually (see
 # https://github.com/rust-lang/rust-clippy/issues/1228).
+
 # Find folders with Cargo.toml files in them and check them (avoids matching
-# this script!)
-for f in $(find . | grep Cargo.toml); do
+# this script!). Use a minimum depth of 2 to avoid matching the workspace's
+# Cargo.toml (located in the top-level directory).
+for f in $(find . -mindepth 2 | grep Cargo.toml); do
 	pushd $(dirname $f) > /dev/null
 	if $(git grep -q 'use .*\*;' -- ':!src/macros.rs'); then
 		echo