Add Makefile to assist in packaging and publishing

.gitignore

@@ -1,5 +1,6 @@
 node_modules
 npm-debug.log
+yarn-error.log
 .DS_Store
 .vscode
 .idea
@@ -9,6 +10,5 @@ coverage/
 artifacts/
 
 .venv*
-bin/
 build/
 ci/

CONTRIBUTING.md

@@ -37,3 +37,5 @@ refreshing the page will be sufficient.
 7. Create zip package: `npx grafana-toolkit plugin:ci-package`
    When this process succeeds, packages can be found within the `ci/packages/` folder.
    The `Error signing manifest` warning can optionally be ignored, YMMV.
+
+Steps 6. and 7. can be shortened by invoking `make package publish`.

Makefile

@@ -0,0 +1,31 @@
+# ===================
+# Package and publish
+# ===================
+
+package:
+	npx grafana-toolkit plugin:ci-build
+	npx grafana-toolkit plugin:ci-build --finish
+	npx grafana-toolkit plugin:ci-package
+
+publish: check-tools check-token
+
+	@# Before running this, export your GitHub access token.
+	@#export GITHUB_TOKEN=8542f7c47b1697a79ab7f105e1d79f054d0b5599
+
+	@# Read version from "package.json".
+	$(eval version=$(shell cat package.json | jq --raw-output .version))
+
+	@# Create release on GitHub.
+	github-release release --user panodata --repo grafana-map-panel --tag $(version) || true
+
+	@# Upload distribution package.
+	$(eval distfile=ci/packages/grafana-map-panel-$(version).zip)
+	github-release upload --user panodata --repo grafana-map-panel --tag $(version) --name $(notdir $(distfile)) --file $(distfile)
+
+
+check-tools:
+	@jq --version >/dev/null 2>&1 || (echo 'ERROR: "jq" not found. Please install using "brew install jq" or download from https://github.com/stedolan/jq/releases.' && exit 1)
+	@github-release --version >/dev/null 2>&1 || (echo 'ERROR: "github-release" not found. Please install using "brew install github-release" or download from https://github.com/github-release/github-release/releases.' && exit 1)
+
+check-token:
+	@test -n "$(GITHUB_TOKEN)" || (echo 'ERROR: GITHUB_TOKEN environment variable not set.' && exit 1)