Add make publish task

Makefile

@@ -1,14 +1,16 @@
 PATH        := $(shell pwd)/node_modules/.bin:${PATH}
 
-PROJECT     :=  $(notdir ${PWD})
-TMP_PATH    := /tmp/${PROJECT}-$(shell date +%s)
+NPM_PACKAGE := $(shell node -e 'console.log(require("./package.json").name)')
+NPM_VERSION := $(shell node -e 'console.log(require("./package.json").version)')
+
+TMP_PATH    := /tmp/${NPM_PACKAGE}-$(shell date +%s)
 
 REMOTE_NAME ?= origin
 REMOTE_REPO ?= $(shell git config --get remote.${REMOTE_NAME}.url)
 
-CURR_HEAD 	:= $(firstword $(shell git show-ref --hash HEAD | cut --bytes=-6) master)
-GITHUB_NAME := nodeca/js-yaml
-SRC_URL_FMT := https://github.com/${GITHUB_NAME}/blob/${CURR_HEAD}/{file}\#L{line}
+CURR_HEAD   := $(firstword $(shell git show-ref --hash HEAD | cut --bytes=-6) master)
+GITHUB_PROJ := nodeca/${NPM_PACKAGE}
+SRC_URL_FMT := https://github.com/${GITHUB_PROJ}/blob/${CURR_HEAD}/{file}\#L{line}
 
 JS_FILES    := $(shell find ./bin ./lib ./test -type f -name '*.js' -print)
 
@@ -73,8 +75,20 @@ gh-pages:
 		git push --force remote +master:gh-pages 
 	rm -rf ${TMP_PATH}
 
+publish:
+	@if test 0 -ne `git status --porcelain | wc -l` ; then \
+		echo "Unclean working tree. Commit or stash changes first." >&2 ; \
+		exit 128 ; \
+		fi
+	@if test 0 -ne `git tag -l ${NPM_VERSION} | wc -l` ; then \
+		echo "Tag ${NPM_VERSION} exists. Update package.json" >&2 ; \
+		exit 128 ; \
+		fi
+	git tag ${NPM_VERSION} && git push origin ${NPM_VERSION}
+	npm publish https://github.com/${GITHUB_PROJ}/tarball/${NPM_VERSION}
+
 todo:
 	grep 'TODO' -n -r ./lib 2>/dev/null || test true
 
-.PHONY: test lint dev-deps gh-pages todo
+.PHONY: publish test lint dev-deps gh-pages todo
 .SILENT: todo test test-functional test-issues