Add Makefile

Makefile

@@ -0,0 +1,30 @@
+# Targets available via Rustup that are supported.
+TARGETS ?= "aarch64-apple-ios" "aarch64-linux-android" "x86_64-apple-darwin" "x86_64-fuchsia" "x86_64-pc-windows-msvc" "x86_64-sun-solaris" "x86_64-unknown-freebsd" "x86_64-unknown-illumos" "x86_64-unknown-linux-gnu" "x86_64-unknown-netbsd" "x86_64-unknown-redox"
+
+test:
+	cargo test --all-features
+
+# Test everything for the current OS/architecture and check all targets in
+# $TARGETS.
+test_all: check_all_targets
+	cargo hack test --feature-powerset
+	cargo hack test --feature-powerset --release
+
+# Check all targets using all features.
+check_all_targets: $(TARGETS)
+$(TARGETS):
+	cargo hack check --feature-powerset --all-targets --examples --bins --tests --target $@
+
+# Installs all required targets for `check_all_targets`.
+install_targets:
+	rustup target add $(TARGETS)
+
+# NOTE: when using this command you might want to change the `test` target to
+# only run a subset of the tests you're actively working on.
+dev:
+	find src/ tests/ Makefile Cargo.toml | entr -d -c $(MAKE) test
+
+clean:
+	cargo clean
+
+.PHONY: test test_all check_all_targets $(TARGETS) install_targets dev clean