SHELL=/bin/bash

# ================================ Cargo ======================================


RUST_CHANNEL ?= stable
CARGO_FLAGS =
RUSTUP_INSTALLED = $(shell command -v rustup 2> /dev/null)
TEST_FILTER ?=

ifndef RUSTUP_INSTALLED
  CARGO = cargo
else
  ifdef CI
    CARGO = cargo
  else
    CARGO = rustup run $(RUST_CHANNEL) cargo
  endif
endif


# ================================ Help =======================================

.PHONY: help
help: ## Print all the available commands
	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | \
	  awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-20s\033[0m %s\n", $$1, $$2}'


# =============================== Build =======================================

.PHONY: check
check: ## Validate the project code
	$(CARGO) check

.PHONY: build
build: ## Build the project in debug mode
	$(CARGO) build $(CARGO_FLAGS)

.PHONY: release
release: CARGO_FLAGS += --release
release: build ## Build the project in release mode


# ================================ Lint =======================================

.PHONY: lint
lint: fmt clippy ## Lint project files

.PHONY: fmt
fmt: ## Check the format of the source code
	cargo fmt --all -- --check

.PHONY: clippy
clippy: ## Check the style of the source code and catch common errors
	$(CARGO) clippy --all-targets --all-features -- -D warnings


# ================================ Test =======================================

.PHONY: test
test: ## Run the tests
	$(CARGO) test --all-features $(TEST_FILTER)

# =============================== Examples ====================================

.PHONY: build-examples
build-examples: ## Build all examples
	@$(CARGO) build --release --examples --all-features

.PHONY: run-examples
run-examples: build-examples ## Run all examples
	@for file in examples/*.rs; do \
	  name=$$(basename $${file/.rs/}); \
	  $(CARGO) run --all-features --release --example $$name; \
	  done;

# ================================ Doc ========================================


.PHONY: doc
doc: RUST_CHANNEL = nightly
doc: ## Build the documentation (available at ./target/doc)
	$(CARGO) doc


# ================================= Watch =====================================

# Requires watchman and watchman-make (https://facebook.github.io/watchman/docs/install.html)

.PHONY: watch
watch: ## Watch file changes and build the project if any
	watchman-make -p 'src/**/*.rs' -t check build

.PHONY: watch-test
watch-test: ## Watch files changes and run the tests if any
	watchman-make -p 'src/**/*.rs' 'tests/**/*.rs' 'examples/**/*.rs' -t test

.PHONY: watch-doc
watch-doc: RUST_CHANNEL = nightly
watch-doc: ## Watch file changes and rebuild the documentation if any
	$(CARGO) watch -x doc -x 'test --doc'

# ================================= Pipelines =================================

.PHONY: stable
stable: RUST_CHANNEL = stable
stable: build lint test ## Run build and tests for stable

.PHONY: beta
beta: RUST_CHANNEL = beta
beta: build lint test ## Run build and tests for beta

.PHONY: nightly
nightly: RUST_CHANNEL = nightly
nightly: build lint test ## Run build, lint and tests for nightly