Add increment version script

Update readme

Makefile

@@ -21,3 +21,9 @@ clean:
 	rm -rf kibbe.spec
 	rm -rf build
 	rm -rf dist
+
+minor-release: 
+	./scripts/increment-version.sh -v minor
+
+major-release: 
+	./scripts/increment-version.sh -v major

README.md

@@ -81,4 +81,13 @@ or simply
 
 ## Linting and formatting
 
-This project uses autopep8 and flake8 for formatting and linting. Make sure your editor has these tools installed and running.
+This project uses autopep8 and flake8 for formatting and linting. Make sure your editor has these tools installed and running.
+
+## Releasing
+
+To release a new version, you need to push a new incremental tag. That will trigger an auto-build and release.
+
+There's a handy script to automate this process in `scripts/increment-version.sh` and you can use make to invoke it:
+
+Minor release: `make minor-release`
+Major release: `make major-relase`

scripts/increment-version.sh

@@ -0,0 +1,57 @@
+#!/bin/bash
+
+VERSION=""
+
+#get parameters
+while getopts v: flag; do
+  case "${flag}" in
+  v) VERSION=${OPTARG} ;;
+  esac
+done
+
+#get highest tag number, and add 1.0.0 if doesn't exist
+CURRENT_VERSION=$(git describe --abbrev=0 --tags 2>/dev/null)
+
+if [[ $CURRENT_VERSION == '' ]]; then
+  CURRENT_VERSION='1.0.0'
+fi
+echo "Current Version: $CURRENT_VERSION"
+
+#replace . with space so can split into an array
+CURRENT_VERSION_PARTS=(${CURRENT_VERSION//./ })
+
+#get number parts
+VNUM1=${CURRENT_VERSION_PARTS[0]}
+VNUM2=${CURRENT_VERSION_PARTS[1]}
+VNUM3=${CURRENT_VERSION_PARTS[2]}
+
+if [[ $VERSION == 'major' ]]; then
+  VNUM1=$((VNUM1 + 1))
+elif [[ $VERSION == 'minor' ]]; then
+  VNUM2=$((VNUM2 + 1))
+elif [[ $VERSION == 'patch' ]]; then
+  VNUM3=$((VNUM3 + 1))
+else
+  echo "No version type (https://semver.org/) or incorrect type specified, try: -v [major, minor, patch]"
+  exit 1
+fi
+
+#create new tag
+NEW_TAG="$VNUM1.$VNUM2.$VNUM3"
+echo "($VERSION) updating $CURRENT_VERSION to $NEW_TAG"
+
+#get current hash and see if it already has a tag
+GIT_COMMIT=$(git rev-parse HEAD)
+NEEDS_TAG=$(git describe --contains $GIT_COMMIT 2>/dev/null)
+
+#only tag if no tag already
+#to publish, need to be logged in to npm, and with clean working directory: `npm login; git stash`
+if [ -z "$NEEDS_TAG" ]; then
+  git tag $NEW_TAG
+  echo "Tagged with $NEW_TAG"
+  git push --tags
+else
+  echo "Already a tag on this commit"
+fi
+
+exit 0