Converge local and cloud gorelease scripts, improve release notes

releasing/compile-changelog.sh

@@ -0,0 +1,53 @@
+#!/bin/bash
+#
+# Builds a PR-oriented changelog from the git history for the given module.
+#
+# Usage (from top of repo):
+#
+#  releasing/compile-changelog.sh MODULE TAG CHANGE_LOG_FILE
+#
+# Where TAG is in the form
+#
+#   api/v1.2.3
+#   kustomize/v1.2.3
+#   cmd/config/v1.2.3
+#   ... etc.
+#
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+if [[ -z "${1-}" ]] || [[ -z "${2-}" ]] || [[ -z "${3-}" ]]; then
+  echo "Usage: $0 <module> <fullTag> <changeLogFile>"
+  echo "Example: $0 kyaml kyaml/v0.13.4 changelog.txt"
+  exit 1
+fi
+
+module=$1
+fullTag=$2
+changeLogFile=$3
+
+# Find previous tag that matches the tags module
+prevTag=$(git tag -l "$module*" --sort=-version:refname --no-contains="$fullTag" | head -n 1)
+
+commits=( $(git log "$prevTag".."$fullTag" \
+  --pretty=format:'%H' \
+  --abbrev-commit --no-decorate --no-color --no-merges \
+  -- "$module") )
+
+# There is a 256 character limit on the query parameter for the GitHub API, so split into batches then deduplicate results
+batchSize=5
+results=""
+for((i=0; i < ${#commits[@]}; i+=batchSize))
+do
+  commitList=$(IFS="+"; echo "${commits[@]:i:batchSize}" | sed 's/ /+/g')
+  if newResults=$(curl -sSL "https://api.github.com/search/issues?q=$commitList+repo%3Akubernetes-sigs%2Fkustomize" | jq -r '[  .items[] |  { number, title } ]'); then
+    results=$(echo "$results" "$newResults" | jq -s '.[0] + .[1] | unique')
+  else
+    echo "Failed to fetch results for commits: $commitList"
+    exit 1
+  fi
+done
+
+echo "${results}" | jq -r '.[] | select( .title | startswith("Back to development mode") | not) | "#\(.number): \(.title)" ' > "$changeLogFile"