Update releasing setup

RELEASING.md

@@ -1,11 +1,6 @@
 Releasing
 =========
 
-1. Change the version in `gradle.properties` to a non-SNAPSHOT version.
-2. Update the `CHANGELOG.md` for the impending release.
-3. `git commit -am "Prepare for release X.Y.Z."` (where X.Y.Z is the new version)
-4. `git tag -a X.Y.Z -m "Version X.Y.Z"` (where X.Y.Z is the new version)
-5. `./gradlew publish && ./gradlew closeAndReleaseRepository`
-6. Update the `gradle.properties` to the next SNAPSHOT version.
-7. `git commit -am "Prepare next development version."`
-8. `git push && git push --tags`
+1. Update the `CHANGELOG.md` for the impending release.
+2. Run `./release.sh <version>`.
+3. Publish the release on the repo's releases tab.

release.sh

@@ -0,0 +1,60 @@
+#!/usr/bin/env bash
+
+set -exo pipefail
+
+# Helper function to increment a semantic version string.
+function increment_version() {
+  local delimiter=.
+  # shellcheck disable=SC2207
+  local array=($(echo "$1" | tr $delimiter '\n'))
+  local version_type=$2
+  local major=${array[0]}
+  local minor=${array[1]}
+  local patch=${array[2]}
+
+  if [ "$version_type" = "--major" ]; then
+    major=$((major + 1))
+    minor=0
+    patch=0
+  elif [ "$version_type" = "--minor" ]; then
+    minor=$((minor + 1))
+    patch=0
+  elif [ "$version_type" = "--patch" ]; then
+    patch=$((patch + 1))
+  else
+    echo "Invalid version type. Must be one of: '--major', '--minor', '--patch'"
+    exit 1
+  fi
+
+  incremented_version="$major.$minor.$patch"
+
+  echo "Incremented version: $incremented_version"
+}
+
+# Gets a property out of a .properties file
+# usage: getProperty $key $filename
+function getProperty() {
+  grep "${1}" "$2" | cut -d'=' -f2
+}
+
+NEW_VERSION=$1
+NEXT_VERSION="$(increment_version "$NEW_VERSION" --minor)-SNAPSHOT"
+SNAPSHOT_VERSION=$(getProperty 'VERSION_NAME' gradle.properties)
+
+echo "Publishing $NEW_VERSION"
+
+# Prepare release
+sed -i '' "s/${SNAPSHOT_VERSION}/${NEW_VERSION}/g" gradle.properties
+git commit -am "Prepare for release $NEW_VERSION."
+git tag -a "$NEW_VERSION" -m "Version $NEW_VERSION"
+
+# Publish
+./gradlew publish -x dokkaHt .ml
+
+# Prepare next snapshot
+echo "Updating snapshot version to $NEXT_VERSION"
+sed -i '' "s/${NEW_VERSION}/${NEXT_VERSION}/g" gradle.properties
+git commit -am "Prepare next development version."
+
+# Push it all up
+git push && git push --tags