s3-download

#!/usr/bin/env bash
#
# Downloads cross-compiled go executables for bundling inside platform-
# specific packages such as gem, jar, npm module etc.
#
# If the files are available locally, they are copied. If not, they
# are downloaded from S3.
#
set -euf -o pipefail

basename=$1
version=$2
baseurl=https://s3.eu-west-2.amazonaws.com/io.cucumber

rm -rf "${basename}"
mkdir "${basename}"

# Loop over all platforms that gox builds
for platform in \
  darwin-386 \
  darwin-amd64 \
  freebsd-386 \
  freebsd-amd64 \
  freebsd-arm \
  linux-386 \
  linux-amd64 \
  linux-arm \
  linux-mips \
  linux-mips64 \
  linux-mips64le \
  linux-mipsle \
  linux-s390x \
  netbsd-386 \
  netbsd-amd64 \
  netbsd-arm \
  openbsd-386 \
  openbsd-amd64 \
  windows-386.exe \
  windows-amd64.exe
do
  src_url="${baseurl}/${basename}/${version}/${basename}-${platform}"
  src_file="../go/dist/${basename}-${platform}"
  file="${basename}/${basename}-${platform}"

  if [ -e ${src_file} ]; then
    cp ${src_file} ${file}
  else
    # cURL occasionaly fails. Try up to 3 times with a 5 sec sleep in-betweeen.
    for i in 1 2 3; do 
      curl "${src_url}" -o "${file}" && chmod +x "${file}" && break || sleep 5;
    done
  fi
done