Update repo sync policies

* Don't try and sync non-apache license files.
* Force create CODE_OF_CONDUCT.md.
* Switch to using an array of files to update.

Signed-off-by: Ben Kochie <superq@gmail.com>

scripts/sync_repo_files.sh

@@ -53,17 +53,30 @@ post_pull_request() {
     "https://api.github.com/repos/${1}/pulls"
 }
 
+check_license() {
+  # Check to see if the input is an Apache license of some kind
+  echo "$1" | grep --quiet --no-messages --ignore-case 'Apache License'
+}
+
 process_repo() {
   local org_repo="$1"
   echo -e "\e[32mAnalyzing '${org_repo}'\e[0m"
 
-  local needs_update=0
+  local needs_update=()
   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}/master/${source_file}")"
+    if [[ "${source_file}" == 'LICENSE' ]] && ! check_license "${target_file}" ; then
+      echo "LICENSE in ${org_repo} is not apache, skipping."
+      continue
+    fi
     if [[ -z "${target_file}" ]]; then
       echo "${source_file} doesn't exist in ${org_repo}"
+      if [[ "${source_file}" == 'CODE_OF_CONDUCT.md' ]] ; then
+        echo "CODE_OF_CONDUCT.md missing in ${org_repo}, force updating."
+        needs_update+=('CODE_OF_CONDUCT.md')
+      fi
       continue
     fi
     target_checksum="$(echo "${target_file}" | sha256sum | cut -d' ' -f1)"
@@ -71,10 +84,10 @@ process_repo() {
       echo "${source_file} is already in sync."
       continue
     fi
-    needs_update=1
+    needs_update+=("${source_file}")
   done
 
-  if [[ "${needs_update}" -eq 0 ]] ; then
+  if [[ "${#needs_update[@]}" -eq 0 ]] ; then
     echo "No files need sync."
     return
   fi
@@ -85,7 +98,7 @@ process_repo() {
   git checkout -b "${branch}" || return 1
 
   # Update the files in target repo by one from prometheus/prometheus.
-  for source_file in ${SYNC_FILES}; do
+  for source_file in ${needs_update[@]}; do
     cp -f "${source_dir}/${source_file}" "./${source_file}"
   done