remove makes

.gitignore

@@ -1,2 +1,6 @@
 # go test and code quality report
 *.out
+
+# legacy
+go.mod
+go.sum

Makefile

@@ -1,20 +1,59 @@
-OPEN_BROWSER       =
-SUPPORTED_VERSIONS = 1.5 1.6 1.7 1.8 1.9 1.10 latest
+PACKAGES := go list ./... | grep -v vendor | grep -v ^_
+SHELL    ?= /bin/bash -euo pipefail
 
 
-include makes/env.mk
-include makes/docker.mk
-include makes/local.mk
-include cmd/retry/Makefile
+.PHONY: test
+test:                         #| Runs tests with race.
+                              #| Accepts: ARGS.
+                              #| Uses: PACKAGES.
+	$(PACKAGES) | xargs go test -race $(strip $(ARGS))
 
+.PHONY: test-check
+test-check:                   #| Fast runs tests to check their compilation errors.
+                              #| Accepts: ARGS.
+                              #| Uses: PACKAGES.
+	$(PACKAGES) | xargs go test -run=^hack $(strip $(ARGS))
 
-.PHONY: code-quality-check
-code-quality-check: ARGS = \
-	--exclude=".*_test\.go:.*error return value not checked.*\(errcheck\)$$" \
-	--exclude="duplicate of.*_test.go.*\(dupl\)$$" \
-	--vendor --deadline=1m ./... | sort
-code-quality-check: docker-tool-gometalinter
+.PHONY: test-with-coverage
+test-with-coverage:           #| Runs tests with coverage.
+                              #| Accepts: ARGS.
+                              #| Uses: PACKAGES.
+	$(PACKAGES) | xargs go test -cover $(strip $(ARGS))
 
-.PHONY: code-quality-report
-code-quality-report:
-	time make code-quality-check | tail +7 | tee report.out
+.PHONY: test-with-coverage-formatted
+test-with-coverage-formatted: #| Runs tests with coverage and formats the result.
+                              #| Accepts: ARGS.
+                              #| Uses: PACKAGES.
+	$(PACKAGES) | xargs go test -cover $(strip $(ARGS)) | column -t | sort -r
+
+.PHONY: test-with-coverage-profile
+test-with-coverage-profile:   #| Runs tests with coverage and collects the result.
+                              #| Accepts: ARGS, OPEN_BROWSER.
+                              #| Uses: GO_TEST_COVERAGE_MODE, GO_TEST_COVERAGE_FILENAME, PACKAGES.
+	echo 'mode: ${GO_TEST_COVERAGE_MODE}' > '${GO_TEST_COVERAGE_FILENAME}'
+	for package in $$($(PACKAGES)); do \
+	    go test -covermode '${GO_TEST_COVERAGE_MODE}' \
+	            -coverprofile "coverage_$${package##*/}.out" \
+	            $(strip $(ARGS)) "$${package}"; \
+	    if [ -f "coverage_$${package##*/}.out" ]; then \
+	        sed '1d' "coverage_$${package##*/}.out" >> '${GO_TEST_COVERAGE_FILENAME}'; \
+	        rm "coverage_$${package##*/}.out"; \
+	    fi \
+	done
+
+.PHONY: test-example
+test-example: GO_TEST_COVERAGE_FILENAME = coverage_example.out
+test-example:                 #| Runs example tests with coverage and collects the result.
+                              #| Accepts: ARGS, OPEN_BROWSER.
+                              #| Uses: GO_TEST_COVERAGE_MODE, GO_TEST_COVERAGE_FILENAME, PACKAGES.
+	echo 'mode: ${GO_TEST_COVERAGE_MODE}' > '${GO_TEST_COVERAGE_FILENAME}'
+	for package in $$($(PACKAGES)); do \
+	    go test -v -run=Example \
+	            -covermode '${GO_TEST_COVERAGE_MODE}' \
+	            -coverprofile "coverage_example_$${package##*/}.out" \
+	            $(strip $(ARGS)) "$${package}"; \
+	    if [ -f "coverage_$${package##*/}.out" ]; then \
+	        sed '1d' "coverage_example_$${package##*/}.out" >> '${GO_TEST_COVERAGE_FILENAME}'; \
+	        rm "coverage_example_$${package##*/}.out"; \
+	    fi \
+	done