adding a Makefile to simplify release related tasks as well as unit testing

Makefile

@@ -0,0 +1,53 @@
+.PHONY: all coverage coverage-js coverage-php doc doc-js doc-php increment sign test test-js test-php help
+
+CURRENT_VERSION = 1.3.4
+VERSION ?= 1.3.5
+VERSION_FILES = index.php cfg/ *.md css/ i18n/ img/ js/privatebin.js lib/ Makefile tpl/ tst/
+REGEX_CURRENT_VERSION := $(shell echo $(CURRENT_VERSION) | sed "s/\./\\\./g")
+REGEX_VERSION := $(shell echo $(VERSION) | sed "s/\./\\\./g")
+
+all: coverage doc ## Equivalent to running `make coverage doc`.
+
+coverage: coverage-js coverage-php ## Run all unit tests and generate code coverage reports.
+
+coverage-js: ## Run JS unit tests and generate code coverage reports.
+	cd js && nyc mocha
+
+coverage-php: ## Run PHP unit tests and generate code coverage reports.
+	cd tst && phpunit 2> /dev/null
+	cd log/php-coverage-report && sed -i "s#$(CURDIR)##g" *.html */*.html
+
+doc: doc-js doc-php ## Generate all code documentation.
+
+doc-js: ## Generate JS code documentation.
+	jsdoc -p -d doc/jsdoc js/privatebin.js js/legacy.js
+
+doc-php: ## Generate JS code documentation.
+	phpdoc --visibility public,protected,private -t doc/phpdoc -d lib/
+
+increment: ## Increment and commit new version number, set target version using `make increment VERSION=1.2.3`.
+	for F in `grep -l -R $(REGEX_CURRENT_VERSION) $(VERSION_FILES) | grep -v -e tst/log/ -e ":0" -e CHANGELOG.md`; \
+	do \
+		sed -i "s/$(REGEX_CURRENT_VERSION)/$(REGEX_VERSION)/g" $$F; \
+	done
+	git add $(VERSION_FILES)
+	git commit -m "incrementing version"
+
+sign: ## Sign a release.
+	git tag $(VERSION)
+	git push --tags
+	signrelease.sh
+
+test: test-js test-php ## Run all unit tests.
+
+test-js: ## Run JS unit tests.
+	cd js && mocha
+
+test-php: ## Run PHP unit tests.
+	cd tst && phpunit --no-coverage
+
+help: ## Displays these usage instructions.
+	@echo "Usage: make <target(s)>"
+	@echo
+	@echo "Specify one or multiple of the following targets and they will be processed in the given order:"
+	@awk 'BEGIN {FS = ":.*?## "} /^[a-zA-Z_-]+:.*?## / {printf "%-16s%s\n", $$1, $$2}' $(MAKEFILE_LIST)