Add release scripts

.github_changelog_generator

@@ -0,0 +1,4 @@
+user=grisp
+project=grisp_tools
+unreleased=false
+exclude-labels=duplicate,invalid,wontfix,question,help wanted,unreleased

.scripts/cut.sh

@@ -0,0 +1,59 @@
+#!/bin/bash
+
+set -e # Abort on first failure, so we don't mess something up
+
+check_path() {
+    if ! [ -x "$(command -v "$1")" ]; then
+        echo >&2 "error: $1 not available on path"
+        if [ -n "$2" ]; then
+            echo "($2)" 
+        fi
+        exit 1
+    fi
+}
+
+check_path git
+check_path sed
+check_path rebar3 "http://www.rebar3.org"
+check_path github_changelog_generator "https://github.com/github-changelog-generator/github-changelog-generator"
+check_path chandler "https://github.com/mattbrictson/chandler"
+
+if [ -z "$1" ]; then
+    # Missing tag name
+    echo "usage: cut <version>" >&2
+    exit 129
+fi
+if [ ! -z "$(git status --short)" ]; then
+    # Sanity check
+    echo "fatal: dirty repository" >&2
+    exit 128
+fi
+
+VSN="$1"
+
+# Update version
+sed -i "" -e "s/{vsn, .*}/{vsn, \"$VSN\"}/g" src/*.app.src
+git add src/*.app.src
+if [ -f doc/overview.edoc ]; then
+    sed -i "" -e "s/@version .*/@version $VSN/g" doc/overview.edoc
+    git add doc/overview.edoc
+fi
+
+# Commit, tag and push
+git commit -m "Version $VSN"
+git tag -s "$VSN" -m "Version $VSN"
+git push && git push --tags
+
+# Clean and publish package and docs
+rm -rf ebin
+rm -rf src/**/*.beam
+rm -rf test/**/*.beam
+rebar3 hex publish
+rebar3 hex docs
+
+# Generate and push changelog
+github_changelog_generator
+git add CHANGELOG.md
+git commit -m "Update changelog for version $VSN"
+git push
+chandler push "$VSN"