Add tarball packaging via 'make dist'

Author: rtomayko

Makefile

@@ -10,4 +10,7 @@ info:
 	@rsync --version | head -1
 	@echo
 
-.PHONY: test info
+dist:
+	@script/package-tarball
+
+.PHONY: test info dist

script/package-tarball

@@ -0,0 +1,29 @@
+#!/bin/sh
+# Usage: script/package-tarball
+# Script to build a tarball release package from the current HEAD version.
+# The package version comes from `git-describe --tags' so the release tag should
+# be in place before this command is run.
+set -e
+
+# Change into project root
+cd "$(dirname "$0")"/..
+
+# Basic package name and version.
+PKG_BASE="github-backup-utils"
+PKG_VERS="$(git describe --tags)"
+PKG_NAME="${PKG_BASE}-${PKG_VERS}"
+
+# Run git-archive to generate tarball
+echo "Creating ${PKG_NAME}.tar.gz ..."
+mkdir -p dist
+git archive \
+    --format=tar.gz \
+    --prefix="$PKG_NAME/" \
+    --output="dist/${PKG_NAME}.tar.gz" \
+    HEAD
+
+# List archive contents for review
+gzip -dc < "dist/${PKG_NAME}.tar.gz" | tar tf -
+
+# Output location
+echo "Package dist/${PKG_NAME}.tar.gz OK"