Added Makefile to generate RPM and Deb packages

With fpm (https://github.com/jordansissel/fpm) it is easily
possible to generate packages for various operating systems.

This Makefile includes tasks to generate RPM and Debian packages:
    * make package_deb
    * make package_rpm

.gitignore

@@ -7,6 +7,11 @@
 _obj
 _test
 
+# Package building
+build
+*.deb
+*.rpm
+
 # Architecture specific extensions/prefixes
 *.[568vq]
 [568vq].out

Makefile

@@ -0,0 +1,62 @@
+SHELL := /bin/bash
+
+NAME=gosgp
+VERSION=0.1
+
+# Dependencies: golang
+
+.PHONY: all clean clean_all prepare package_deb package_rpm
+.SILENT: desc
+
+all: desc
+
+desc:
+	echo "usage: please use either 'make package_deb' or 'make package_rpm'"
+
+clean:
+	rm -f $(NAME)*.deb
+	rm -f $(NAME)*.rpm
+	rm -rf ./build
+
+clean_all: clean
+	rm -rf /tmp/gosgp
+
+prepare: clean
+	mkdir -p ./build/usr/bin/
+	GOPATH=/tmp/gosgp go get -d
+	GOPATH=/tmp/gosgp go build -o gosgp
+	mv gosgp ./build/usr/bin/.
+
+package_deb: prepare
+	fpm -s dir \
+	    -t deb \
+            -n $(NAME) \
+            -m "Jochen Breuer <brejoc@gmail.com>" \
+            --url "https://github.com/brejoc/gosgp" \
+            --license "GPLv2" \
+            --description "Command line SuperGenPass password generator written in go." \
+            -v $(VERSION) \
+            --deb-user root \
+            --deb-group root \
+            -C ./build \
+            usr
+	#############################################################
+	### Don't forget to 'make clean_all' to delete GOPATH dir ###
+	#############################################################
+
+package_rpm: prepare
+	fpm -s dir \
+            -t rpm \
+            -n $(NAME) \
+            -m "Jochen Breuer <brejoc@gmail.com>" \
+            --url "https://github.com/brejoc/gosgp" \
+            --license "GPLv2" \
+            --description "Command line SuperGenPass password generator written in go." \
+            -v $(VERSION) \
+            --rpm-user root \
+            --rpm-group root \
+            -C ./build \
+            usr
+	#############################################################
+	### Don't forget to 'make clean_all' to delete GOPATH dir ###
+	#############################################################