From e73930e3d50b4d2ad225b68d4e1c9d653825b843 Mon Sep 17 00:00:00 2001
From: Ben Kochie <superq@gmail.com>
Date: Sat, 27 Mar 2021 14:33:22 +0100
Subject: [PATCH] Sync CircleCI Orb version

Add sync of the Prometheus CircleCI Orb version to the sync script.
* Add `yq` to the repo sync CI job.

NOTE: This will re-format the down-stream yaml config, it does not
preserve whitespace and enforces some indenting rules. It does preserve
comments.

Signed-off-by: Ben Kochie <superq@gmail.com>
---
 .circleci/config.yml       |  2 ++
 scripts/sync_repo_files.sh | 40 ++++++++++++++++++++++++++++++++++++--
 2 files changed, 40 insertions(+), 2 deletions(-)

diff --git a/.circleci/config.yml b/.circleci/config.yml
index bd068ef47..a91248d49 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -110,6 +110,8 @@ jobs:
     executor: golang
     steps:
     - checkout
+    - run: curl -sL https://github.com/mikefarah/yq/releases/download/v4.6.3/yq_linux_amd64 -O "${PATH%%:*}/yq" && chmod -v +x "${PATH%%:*}/yq"
+    - run: sha256sum -c <(echo "c4343783c3361495c0d6d1eb742bba7432aa65e13e9fb8d7e201d544bcf14247 ${PATH%%:*}/yq")
     - run: ./scripts/sync_repo_files.sh
 
 workflows:
diff --git a/scripts/sync_repo_files.sh b/scripts/sync_repo_files.sh
index 72e5c86e2..a52943da9 100755
--- a/scripts/sync_repo_files.sh
+++ b/scripts/sync_repo_files.sh
@@ -42,6 +42,13 @@ source_dir="$(pwd)"
 tmp_dir="$(mktemp -d)"
 trap 'rm -rf "${tmp_dir}"' EXIT
 
+prometheus_orb_version="$(yq eval '.orbs.prometheus' .circleci/config.yml)"
+if [[ -z "${prometheus_orb_version}" ]]; then
+  echo_red '"ERROR: Unable to get CircleCI orb version'
+  exit 1
+fi
+
+## Internal functions
 github_api() {
   local url
   url="https://api.github.com/${1}"
@@ -84,6 +91,24 @@ check_license() {
   echo "$1" | grep --quiet --no-messages --ignore-case 'Apache License'
 }
 
+check_circleci_orb() {
+  local org_repo
+  local default_branch
+  org_repo="$1"
+  default_branch="$2"
+  local ci_config_url="https://raw.githubusercontent.com/${org_repo}/${default_branch}/.circleci/config.yml"
+
+  orb_version="$(curl -sL --fail "${ci_config_url}" | yq eval '.orbs.prometheus' -)"
+  if [[ -z "${orb_version}" ]]; then
+    echo_red "ERROR: Failed to fetch CirleCI orb version from '${org_repo}'"
+    return 1
+  fi
+
+  if [[ "${orb_version}" != "${prometheus_orb_version}" ]]; then
+    echo "CircleCI-orb"
+  fi
+}
+
 process_repo() {
   local org_repo
   local default_branch
@@ -101,7 +126,7 @@ process_repo() {
   for source_file in ${SYNC_FILES}; do
     source_checksum="$(sha256sum "${source_dir}/${source_file}" | cut -d' ' -f1)"
 
-    target_file="$(curl -s --fail "https://raw.githubusercontent.com/${org_repo}/${default_branch}/${source_file}")"
+    target_file="$(curl -sL --fail "https://raw.githubusercontent.com/${org_repo}/${default_branch}/${source_file}")"
     if [[ "${source_file}" == 'LICENSE' ]] && ! check_license "${target_file}" ; then
       echo "LICENSE in ${org_repo} is not apache, skipping."
       continue
@@ -125,6 +150,13 @@ process_repo() {
     needs_update+=("${source_file}")
   done
 
+  local circleci
+  circleci="$(check_circleci_orb "${org_repo}" "${default_branch}")"
+  if [[ -n "${circleci}" ]]; then
+    echo "${circleci} needs updating."
+    needs_update+=("${circleci}")
+  fi
+
   if [[ "${#needs_update[@]}" -eq 0 ]] ; then
     echo "No files need sync."
     return
@@ -137,7 +169,10 @@ process_repo() {
 
   # Update the files in target repo by one from prometheus/prometheus.
   for source_file in "${needs_update[@]}"; do
-    cp -f "${source_dir}/${source_file}" "./${source_file}"
+    case "${source_file}" in
+      CircleCI-orb) yq eval -i ".orbs.prometheus = \"${prometheus_orb_version}\"" .circleci/config.yml ;;
+      *) cp -f "${source_dir}/${source_file}" "./${source_file}" ;;
+    esac
   done
 
   if [[ -n "$(git status --porcelain)" ]]; then
@@ -156,6 +191,7 @@ process_repo() {
   fi
 }
 
+## main
 for org in ${orgs}; do
   mkdir -p "${tmp_dir}/${org}"
   # Iterate over all repositories in ${org}. The GitHub API can return 100 items