This is a bash script to download the artifacts from a Circle CI job. You will need to configure with your Circle CI API token, the github account related to the Circle CI job, and the github project name.

circle_ci_download.sh

#!/bin/bash
die () {
    echo >&2 "$@"
    exit 1
}

[ "$#" -eq 2 ] || die "::\tThis script downloads the output files from a Circle CI job\t::\n::\tpass the Circle CI job number as first argument\t\t\t::\n::\tpass the output folder as second argument\t::"
echo $1 | grep -E -q '^[0-9]+$' || die "::\tCircle CI build number required, [ $1 ] provided\t\t::"
if [ -d "$2" ]; then
  echo " "
else
  die "::\tCircle CI output folder provided does not exist! script cannot proceed!! [ $2 ] provided\t\t::" 
fi

CIRCLECI_JOB_NUMBER=$1  #see Circle CI web interface to get job number
OUTPUT_DIR=$2

# use the CircleCI web interface to generate an API key
CIRCLE_TOKEN='REPLACE_WITH_YOUR_CIRCLE_CI_API_KEY'

GITHUB_ACCOUNT_NAME='REPLACE_WITH_THE_GITHUB_ACCOUNT_NAME_FOR_YOUR_GITHUB_PROJECT'
GITHUB_REPO_NAME='REPLACE_WITH_YOUR_GITHUB_REPO_NAME'

pushd $OUTPUT_DIR >/dev/null 2>&1
  curl https://circleci.com/api/v1.1/project/github/$GITHUB_ACCOUNT_NAME/$GITHUB_REPO_NAME/$CIRCLECI_JOB_NUMBER/artifacts?circle-token=$CIRCLE_TOKEN | grep -o 'https://[^"]*' > circleci_artifacts_for_job_$CIRCLECI_JOB_NUMBER.txt
  <circleci_artifacts_for_job_$CIRCLECI_JOB_NUMBER.txt xargs -P4 -I % wget %?circle-token=$CIRCLE_TOKEN 

  # wget leaves the querystring at the end of each file downloaded
  # need to strip that off
  for i in `find . -type f`
  do
    mv $i `echo $i | cut -d? -f1`
  done
popd >/dev/null 2>&1