build_ci.sh

#!/usr/bin/env bash

set e+x
echo "Getting git refs"

git show-ref | while IFS=' ' read -r hash name;
do
  echo "ref $name hash $hash"
  test ! -e "${GIT_DIR:-.git}/$name" && echo $hash > "${GIT_DIR:-.git}/$name";
done

set -xou pipefail

DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"

git remote -v
git branch
git fetch origin

FOLDER_COMMIT=$(git log -1 --format=format:%H --full-diff $DIR)
BASE_COMMIT=$(git show-ref refs/remotes/origin/master | awk '{print $1}')

git merge-base --is-ancestor "${FOLDER_COMMIT}" "${BASE_COMMIT}"
COMMIT_SAME=$?

set -exou pipefail

mkdir -p "${DIR}/output/"
# This is so that circle's persist_to_workspace doesn't fail when builds don't run
touch "${DIR}/output/hello"

if [ $COMMIT_SAME -eq 1 ]; then
    echo "FFMpeg has changed"
    if [[ "$(uname)" == Darwin ]]; then
      echo $(xcode-select -p)/Platforms/MacOSX.platform/Developer/SDKs
      ls $(xcode-select -p)/Platforms/MacOSX.platform/Developer/SDKs
      export CONDA_BUILD_SYSROOT=$(xcode-select -p)/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk
    fi
    "${DIR}/build_ffmpeg.sh"
else
    echo "No changes in FFmpeg"
    exit 0;
fi