Add release script

README.md

@@ -55,6 +55,54 @@ It can be useful for automating repetitive tasks such as updating version number
     replacement-text: '42'
 ```
 
+## Development
+
+### Update the Action Code
+
+The [`src/`](./src/) directory contains the source code that will be run when
+the action is invoked.
+
+After making changes to the action code, make sure to run the following command
+to run all tests, lint the code, and build the final JavaScript action code:
+
+```bash
+npm run all
+```
+
+> This step is important! It will run [`ncc`](https://github.com/vercel/ncc) to
+> build the final JavaScript action code with all dependencies included. If you
+> do not run this step, the action will not work correctly when it is used in a
+> workflow. This step also includes the `--license` option for `ncc`, which will
+> create a license file for all of the production node modules used in your
+> project.
+
+### Publishing a New Release
+
+This project includes a helper script, [`script/release`](./script/release)
+designed to streamline the process of tagging and pushing new releases for
+GitHub Actions.
+
+GitHub Actions allows users to select a specific version of the action to use,
+based on release tags. This script simplifies this process by performing the
+following steps:
+
+1. **Retrieving the latest release tag:** The script starts by fetching the most
+   recent release tag by looking at the local data available in your repository.
+1. **Prompting for a new release tag:** The user is then prompted to enter a new
+   release tag. To assist with this, the script displays the latest release tag
+   and provides a regular expression to validate the format of the new tag.
+1. **Tagging the new release:** Once a valid new tag is entered, the script tags
+   the new release.
+1. **Pushing the new tag to the remote:** Finally, the script pushes the new tag
+   to the remote repository. From here, you will need to create a new release in
+   GitHub and users can easily reference the new tag in their workflows.
+
+To use the script, run the following command:
+
+```bash
+./script/release
+```
+
 ## Contributing
 
 Contributions are welcome! Here are some ways you can contribute:

script/release

@@ -0,0 +1,59 @@
+#!/bin/bash
+
+# About:
+#
+# This is a helper script to tag and push a new release. GitHub Actions use
+# release tags to allow users to select a specific version of the action to use.
+#
+# See: https://github.com/actions/typescript-action#publishing-a-new-release
+#
+# This script will do the following:
+#
+# 1. Get the latest release tag
+# 2. Prompt the user for a new release tag
+# 3. Tag the new release
+# 4. Push the new tag to the remote
+#
+# Usage:
+#
+# script/release
+
+# Terminal colors
+OFF='\033[0m'
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+BLUE='\033[0;34m'
+
+# Get the latest release tag
+latest_tag=$(git describe --tags "$(git rev-list --tags --max-count=1)")
+
+if [[ -z "$latest_tag" ]]; then
+	# There are no existing release tags
+	echo -e "No tags found (yet) - Continue to create and push your first tag"
+	latest_tag="[unknown]"
+fi
+
+# Display the latest release tag
+echo -e "The latest release tag is: ${BLUE}${latest_tag}${OFF}"
+
+# Prompt the user for the new release tag
+read -r -p 'Enter a new release tag (vX.X.X format): ' new_tag
+
+# Validate the new release tag
+tag_regex='v[0-9]+(\.[0-9]+){0,2}$'
+if echo "$new_tag" | grep -q -E "$tag_regex"; then
+	echo -e "Tag: ${BLUE}$new_tag${OFF} is valid"
+else
+	# Release tag is not `vX.X.X` format
+	echo -e "Tag: ${BLUE}$new_tag${OFF} is ${RED}not valid${OFF} (must be in vX.X.X format)"
+	exit 1
+fi
+
+# Tag the new release
+git tag -a "$new_tag" -m "$new_tag Release"
+echo -e "${GREEN}Tagged: $new_tag${OFF}"
+
+# Push the new tag to the remote
+git push --tags
+echo -e "${GREEN}Release tag pushed to remote${OFF}"
+echo -e "${GREEN}Done!${OFF}"