Automate more of the release process (#439)

The publish, deploy, and release process is annoying enough at the moment that I avoid doing it frequently. Let's automate most of it to reduce the friction

scripts/print-changelog-update.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+
+# Print changes since the last tagged release in a format to match CHANGELOG.md
+
+set -euo pipefail
+
+if [ $# -lt 1 ]; then
+  echo "Usage: $0 <version>"
+  echo "e.g. $0 1.15.2"
+  exit 1
+fi
+version="$1"
+
+
+# Get the most recent tagged commit that is an ancestor of HEAD
+tagged_commit=$(git log --simplify-by-decoration --oneline --decorate | grep -E '^\w+ \(tag: .+\) .+$' | head -n1 | cut -d' ' -f 1)
+
+gitlog=$(git log --graph --pretty=format:"%s" --abbrev-commit "$tagged_commit"..HEAD)
+
+version="$1"
+
+current_date=$(date +%Y-%m-%d)
+echo "## [$version] - $current_date"
+echo
+
+while IFS= read line; do
+  message=$(echo "$line" | sed 's/^* //g')
+  message_without_pr_num=$(echo "$message" | sed 's/ (#[0-9][0-9]*)//g')
+
+  pr_number=$(echo "$message" | grep -Eo '#[0-9]+' | grep -Eo '[0-9]+'; true)
+
+  if [[ -n "$pr_number" ]]; then
+    author=$(gh pr view $pr_number --json author -q ".author.login")
+    pr_link="https://github.com/jlfwong/speedscope/pull/$pr_number"
+    echo "- $message_without_pr_num [[#$pr_number]($pr_link)] (by @$author)"
+  else
+    echo "- $message_without_pr_num"
+  fi
+done <<< "$gitlog"

scripts/publish-and-deploy.sh

@@ -0,0 +1,51 @@
+#!/bin/bash
+
+# Run the full release process. This means...
+# - Bumping the version in package.json
+# - Updating the changelog
+# - Commiting and tagging the release
+# - Pushing to Github
+# - Publishing a new version to npm
+# - Deploying the website
+# - Create a new release in Github with the zip-file standalone version
+
+set -euxo pipefail
+
+if [ $# -lt 1 ]; then
+  echo "Usage: $0 <minor | patch | version>"
+  echo "e.g. $0 patch"
+  exit 1
+fi
+version_arg="$1"
+
+# Bump versions in package.json and package-lock.json, but don't commit or make tags yet
+version=$(npm version "$version_arg" --no-git-tag-version --no-commit-hooks | sed 's/^v//g')
+tagname="v$version"
+
+script_dir=$(dirname "$0")
+
+# Prepend the changelog update to CHANGELOG.md
+changelog_update=$("$script_dir/print-changelog-update.sh" "$version")
+
+echo -e "$changelog_update\n" > CHANGELOG.md.new
+cat CHANGELOG.md >> CHANGELOG.md.new
+mv CHANGELOG.md.new CHANGELOG.md
+
+# Commit and tag the release
+git add CHANGELOG.md package.json package-lock.json
+git commit -m "$version"
+git tag "$tagname"
+
+# Push to Github
+git push
+git push --tags
+
+# Publish to npm
+npm publish
+
+# Create a new release on Github
+"$script_dir/prepare-zip-file.sh"
+gh release create "$tagname" --title "$tagname" --notes "$changelog_update" --attach "dist/release/speedscope-$version.zip"
+
+# Deploy the website
+npm run deploy