Merge pull request #9355 from tkelman/tk/appveyor-failfast

RFC: Fail fast on AppVeyor for repeated commits to the same PR

appveyor.yml

@@ -32,6 +32,7 @@ cache:
  - llvm-3.3-i686-w64-mingw32-juliadeps.7z
  - llvm-3.3-x86_64-w64-mingw32-juliadeps.7z
  - make-3.81-2-msys-1.0.11-bin.tar.lzma
+ - jq.exe
 
 build_script:
 # Remove C:\MinGW\bin from the path, the version of MinGW installed on

contrib/windows/msys_build.sh

@@ -9,6 +9,22 @@ cd `dirname "$0"`/../..
 # Stop on error
 set -e
 
+# Fail fast on AppVeyor if there are newer pending commits in this PR
+curlflags="curl --retry 10 -k -L -y 5"
+if [ -n "$APPVEYOR_PULL_REQUEST_NUMBER" ]; then
+ # download a handy cli json parser
+ if ! [ -e jq.exe ]; then
+ $curlflags -O https://stedolan.github.io/jq/download/win64/jq.exe
+ fi
+ av_api_url="https://ci.appveyor.com/api/projects/StefanKarpinski/julia/history?recordsNumber=50"
+ query=".builds | map(select(.pullRequestId == \"$APPVEYOR_PULL_REQUEST_NUMBER\"))[0].buildNumber"
+ latestbuild="$(curl $av_api_url | ./jq "$query")"
+ if [ -n "$latestbuild" -a "$latestbuild" != "null" -a "$latestbuild" != "$APPVEYOR_BUILD_NUMBER" ]; then
+ echo "There are newer queued builds for this pull request, failing early."
+ exit 1
+ fi
+fi
+
 # If ARCH environment variable not set, choose based on uname -m
 if [ -z "$ARCH" -a -z "$XC_HOST" ]; then
  export ARCH=`uname -m`
@@ -61,8 +77,6 @@ case $(uname) in
  ;;
 esac
 
-curlflags="curl --retry 10 -k -L -y 5"
-
 # Download most recent Julia binary for dependencies
 if ! [ -e julia-installer.exe ]; then
  f=julia-latest-win$bits.exe