Diagnostic messages when GitHub API update fails

Author: retronym

scripts/common

@@ -15,16 +15,21 @@ function postCommitStatus() {
   if [[ "$scala_sha" != "" ]]; then
     local jsonTemplate='{ "state": "%s", "target_url": "%s", "description": "%s", "context": "%s"}'
     local json=$(printf "$jsonTemplate" "$1" "https://travis-ci.com/scala/scala-dist/builds/$TRAVIS_BUILD_ID" "$1" "travis/scala-dist/$version/$mode")
+    [[ -z "$GITHUB_OAUTH_TOKEN" ]] && (echo "Missing environment variable GITHUB_OAUTH_TOKEN!"; exit 1)
+    TMPFILE=$(mktemp -t curl.XXXXXXXXXX)
+
+    local tmpfile=$(mktemp -t curl.XXXXXXXXXX) || exit 1
 
     local curlStatus=$(curl \
-      -s -o /dev/null -w "%{http_code}" \
+      -s -o $tmpfile -w "%{http_code}" \
       -H "Accept: application/vnd.github.v3+json" \
       -H "Authorization: token $GITHUB_OAUTH_TOKEN" \
       -d "$json" \
       https://api.github.com/repos/scala/scala/statuses/$scala_sha)
 
     [[ "$curlStatus" == "201" ]] || {
-      echo "Failed to publish GitHub commit status"
+      echo "Failed to publish GitHub commit status. Got: $curlStatus"
+      cat $tmpfile
       exit 1
     }
   fi