From 64dd11b00a46975a0b23d9c90fea1c1dd99664a4 Mon Sep 17 00:00:00 2001
From: Anita Akaeze <anita.akaeze@hashicorp.com>
Date: Wed, 26 Apr 2023 20:00:09 -0400
Subject: [PATCH] Merge pull request #5288 from hashicorp/NET-3648_fix

NET-3648: perform envoy version verification
---
 .github/scripts/verify_envoy_version.sh    | 178 +++++++++++++++++++++
 .github/workflows/verify-envoy-version.yml |  28 ++++
 2 files changed, 206 insertions(+)
 create mode 100755 .github/scripts/verify_envoy_version.sh
 create mode 100644 .github/workflows/verify-envoy-version.yml

diff --git a/.github/scripts/verify_envoy_version.sh b/.github/scripts/verify_envoy_version.sh
new file mode 100755
index 0000000000000..773431f50bc85
--- /dev/null
+++ b/.github/scripts/verify_envoy_version.sh
@@ -0,0 +1,178 @@
+#!/bin/bash
+# Copyright (c) HashiCorp, Inc.
+# SPDX-License-Identifier: MPL-2.0
+
+set -euo pipefail
+
+current_branch=$GITHUB_REF
+GITHUB_DEFAULT_BRANCH='main'
+
+if [ -z "$GITHUB_TOKEN" ]; then
+  echo "GITHUB_TOKEN must be set"
+  exit 1
+fi
+
+if [ -z "$current_branch" ]; then
+  echo "GITHUB_REF must be set"
+  exit 1
+fi
+
+# Get Consul and Envoy version 
+SCRIPT_DIR="$( cd -- "$(dirname "$0")" >/dev/null 2>&1 ; pwd -P )"
+pushd $SCRIPT_DIR/../.. # repository root
+consul_envoy_data_json=$(echo go run ./test/integration/consul-container/test/consul_envoy_version/consul_envoy_version.go)
+# go back to where you started when finished
+popd
+
+if [ -z "$consul_envoy_data_json" ]; then
+  echo "Error! Consul and Envoy versions not returned: $consul_envoy_data_json"
+  exit 1
+fi
+
+# sanitize_consul_envoy_version removes characters from result that may contain new lines, spaces, and [...]
+# example envoyVersions:[1.25.4 1.24.6 1.23.8 1.22.11] => 1.25.4 1.24.6 1.23.8 1.22.11
+sanitize_consul_envoy_version() {
+  local _consul_version=$(eval "$consul_envoy_data_json" | jq -r '.ConsulVersion')
+  local _envoy_version=$(eval "$consul_envoy_data_json" | jq -r '.EnvoyVersions' | tr -d '"' | tr -d '\n' | tr -d ' '| tr -d '[]')
+  echo "${_consul_version}" "${_envoy_version}"
+}
+
+# get major version for Consul and Envoy
+get_major_version(){
+  local _verison="$1"
+  local _abbrVersion="$(cut -d "." -f1-2 <<< $_verison)"
+  echo "${_abbrVersion}"
+}
+
+get_latest_envoy_version() {
+  OUTPUT_FILE=$(mktemp)
+  HTTP_CODE=$(curl -L --silent --output "$OUTPUT_FILE" -w "%{http_code}" \
+    -H "Accept: application/vnd.github+json" \
+    -H "Authorization: Bearer ${GITHUB_TOKEN}"\
+    -H "X-GitHub-Api-Version: 2022-11-28" \
+    https://api.github.com/repos/envoyproxy/envoy/releases/latest)
+  if [[ ${HTTP_CODE} -lt 200 || ${HTTP_CODE} -gt 299 ]]; then
+    cat >&2 "$OUTPUT_FILE"
+    rm "$OUTPUT_FILE"
+    exit 1
+  fi
+  _latest_envoy_version=$(jq -r '.tag_name' "$OUTPUT_FILE")
+  echo "$_latest_envoy_version" 
+  rm "$OUTPUT_FILE"
+}
+
+# major_envoy_versions takes multiple arguments
+major_envoy_versions(){
+  version=("$@")
+  for i in "${version[@]}";
+  do
+    envoy_versions_array+="$(cut -d "." -f1-2 <<< $i)"
+  done
+  echo "${envoy_versions_array}"
+}
+
+# Get latest Envoy version from envoyproxy repo
+released_envoy_version=$(get_latest_envoy_version)
+major_released_envoy_version="${released_envoy_version[@]:1:4}"
+
+validate_envoy_version_main(){
+  echo "verify "main" GitHub branch has latest envoy version"
+  # Get envoy version for current branch
+  ENVOY_VERSIONS=$(sanitize_consul_envoy_version | awk '{print $2}' | tr ',' ' ')
+  envoy_version_main_branch=$(get_major_version ${ENVOY_VERSIONS})
+
+  if [[ "$envoy_version_main_branch" != "$major_released_envoy_version" ]]; then
+    echo
+    echo "Latest released Envoy version is: "$released_envoy_version""
+    echo "ERROR! Branch $current_branch; Envoy versions: "$ENVOY_VERSIONS" needs to be updated."
+    exit 1
+    else
+      echo "#### SUCCESS! ##### Compatible Envoy versions found: ${ENVOY_VERSIONS}"
+      exit 0
+  fi
+}
+
+if [[ "$current_branch" == *"$GITHUB_DEFAULT_BRANCH"* ]]; then
+  validate_envoy_version_main
+fi 
+
+# filter consul and envoy version 
+CONSUL_VERSION=$(sanitize_consul_envoy_version | awk '{print $1}')
+ENVOY_VERSIONS=$(sanitize_consul_envoy_version | awk '{print $2}' | tr ',' ' ') 
+
+# Get Consul and Envoy version from default branch
+echo checking out "${GITHUB_DEFAULT_BRANCH}" branch
+git checkout "${GITHUB_DEFAULT_BRANCH}"
+
+# filter consul and envoy version from default branch 
+CONSUL_VERSION_DEFAULT_BRANCH=$(sanitize_consul_envoy_version | awk '{print $1}')
+ENVOY_VERSIONS_DEFAULT_BRANCH=$(sanitize_consul_envoy_version | awk '{print $2}' | tr ',' ' ') 
+
+# Ensure required values are not empty
+if [ -z "$CONSUL_VERSION" ] || [ -z "$CONSUL_VERSION_DEFAULT_BRANCH" ] || [ -z "$ENVOY_VERSIONS" ] || [ -z "$ENVOY_VERSIONS_DEFAULT_BRANCH" ]; then
+  echo "Error! Consul version: $CONSUL_VERSION | Consul version default branch: $CONSUL_VERSION_DEFAULT_BRANCH | Envoy version: $ENVOY_VERSIONS | Envoy version default branch: $ENVOY_VERSIONS_DEFAULT_BRANCH cannot be empty"
+  exit 1
+fi
+
+echo checking out branch: "${current_branch}"
+git checkout "${current_branch}"
+
+echo
+echo "Branch ${current_branch} =>Consul version: ${CONSUL_VERSION}; Envoy Version: ${ENVOY_VERSIONS}" 
+echo "Branch ${GITHUB_DEFAULT_BRANCH} =>Consul version: ${CONSUL_VERSION_DEFAULT_BRANCH}; Envoy Version: ${ENVOY_VERSIONS_DEFAULT_BRANCH}" 
+
+## Get major Consul and Envoy versions on release and default branch
+MAJOR_CONSUL_VERSION=$(get_major_version ${CONSUL_VERSION})
+MAJOR_CONSUL_VERSION_DEFAULT_BRANCH=$(get_major_version ${CONSUL_VERSION_DEFAULT_BRANCH})
+MAJOR_ENVOY_VERSION_DEFAULT_BRANCH=$(get_major_version ${ENVOY_VERSIONS_DEFAULT_BRANCH})
+
+_envoy_versions=($ENVOY_VERSIONS)
+_envoy_versions_default=($ENVOY_VERSIONS_DEFAULT_BRANCH)
+
+## Validate supported envoy versions available - should be 4
+echo
+echo "Validating supported envoy versions available on branches: $current_branch and $GITHUB_DEFAULT_BRANCH"
+if [ "${#_envoy_versions_default[@]}" != 4 ] || [ "${#_envoy_versions[@]}" != 4 ]; then
+  echo "Branch $GITHUB_DEFAULT_BRANCH =>Consul version: ${CONSUL_VERSION_DEFAULT_BRANCH}; Envoy versions: $ENVOY_VERSIONS_DEFAULT_BRANCH"
+  echo "Branch $current_branch =>Consul version: ${CONSUL_VERSION}; Envoy versions: $_envoy_versions"
+  echo "ERROR! Envoy should have 4 compatible versions."
+  exit 1
+fi 
+
+echo "Checking if branch $GITHUB_DEFAULT_BRANCH has latest Envoy version"
+## 1. Check "main" GitHub branch has latest envoy version
+if [[ "$MAJOR_ENVOY_VERSION_DEFAULT_BRANCH" != "$major_released_envoy_version" ]]; then
+  echo
+  echo "Latest released Envoy version is: "$released_envoy_version""
+  echo "ERROR! Branch $GITHUB_DEFAULT_BRANCH; Envoy versions: "$ENVOY_VERSIONS_DEFAULT_BRANCH" needs to be updated."
+  exit 1
+  else
+    echo "#### SUCCESS! #####. Compatible Envoy versions found: ${ENVOY_VERSIONS_DEFAULT_BRANCH}"
+    echo
+
+    ## 2. Check main branch and release branch support the same Envoy major versions
+    ## Get the major Consul version on the main and release branch. If both branches have
+    ## the same major Consul version, verify both branches have the same major Envoy versions.
+    ## Return error if major envoy versions are not the same.
+    echo "Checking branch $current_branch and $GITHUB_DEFAULT_BRANCH have the same compatible major Envoy versions."
+    consul_version_diff=$(echo "$MAJOR_CONSUL_VERSION_DEFAULT_BRANCH $MAJOR_CONSUL_VERSION" | awk '{print $1 - $2}')
+    check=$(echo "$consul_version_diff == 0" | bc -l)
+
+    if (( $check )); then
+      echo "Branch $current_branch and $GITHUB_DEFAULT_BRANCH have the same major Consul version "$MAJOR_CONSUL_VERSION""
+      echo "Validating branches have the same Envoy major versions..."
+      _major_envoy_versions=$(major_envoy_versions $ENVOY_VERSIONS)
+      _major_envoy_versions_default=$(major_envoy_versions $ENVOY_VERSIONS_DEFAULT_BRANCH)
+
+      if [[ "$_major_envoy_versions_default" != "$_major_envoy_versions" ]]; then
+          echo "Branch $GITHUB_DEFAULT_BRANCH =>Envoy versions: $_major_envoy_versions"
+          echo "Branch $current_branch =>Envoy versions: $_major_envoy_versions_default"
+          echo "ERROR! Branches should support the same major versions for envoy."
+          exit 1
+          else
+            echo "#### SUCCESS! #####. Compatible Envoy major versions found: $ENVOY_VERSIONS_DEFAULT_BRANCH"
+      fi
+      else 
+        echo "No validation needed. Branches have different Consul versions"
+    fi
+fi
\ No newline at end of file
diff --git a/.github/workflows/verify-envoy-version.yml b/.github/workflows/verify-envoy-version.yml
new file mode 100644
index 0000000000000..d097e335d37b2
--- /dev/null
+++ b/.github/workflows/verify-envoy-version.yml
@@ -0,0 +1,28 @@
+# Copyright (c) HashiCorp, Inc.
+# SPDX-License-Identifier: MPL-2.0
+
+# This action ensures that Envoy is up to date on main and release branches.
+# This workflow is only triggered on the main and release branches and will
+# only perform a version check when a new release branch is created
+# Contact Consul team for any questions
+
+name: Verify Envoy Version
+
+on:
+  push:
+    branches:
+      - main
+      - release/**
+
+jobs:
+  verify-envoy-version:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}
+          fetch-depth: 0 # by default the checkout action doesn't checkout all branches
+      - name: Run Envoy Version Verification for main and release branches
+        run: ./.github/scripts/verify_envoy_version.sh
+        env:
+          GITHUB_TOKEN: ${{ secrets.ELEVATED_GITHUB_TOKEN }}
\ No newline at end of file