Bash script to fetch artifacts from Sonatype's Nexus 3

nexus-fetch.sh

#!/bin/bash

# Original script in:
# http://blog.sonatype.com/2011/01/downloading-artifacts-from-nexus-with-bash/#.VPW0c1PF_v9
# Adapted for Nexus 3

# Define Nexus Configuration
NEXUS_BASE=http://repository.example.com:8081/nexus

usage()
{
cat <<EOF
usage: $0 options
This script will fetch an artifact from a Nexus server using the Nexus REST redirect service.
OPTIONS:
   -h    Show this message
   -a    GAV coordinate groupId:artifactId:version
   -c    Artifact Classifier
   -e    Artifact Packaging
   -o    Output file
   -r    Repository
   -u    Username
   -p    Password
   -n    Nexus Base URL
   -z    if nexus has newer version of artifact, remove Output File and exit
EOF
}

# Read in Complete Set of Coordinates from the Command Line
GROUP_ID=
ARTIFACT_ID=
VERSION=
CLASSIFIER=""
PACKAGING=jar
REPO=
USERNAME=
PASSWORD=
OUTPUT=

while getopts "hvza:c:e:o:r:u:p:n:" OPTION
do
     case $OPTION in
         h)
             usage
             exit 1
             ;;
         a)
             OIFS=$IFS
             IFS=":"
             GAV_COORD=( $OPTARG )
             GROUP_ID=${GAV_COORD[0]}
             ARTIFACT_ID=${GAV_COORD[1]}
             VERSION=${GAV_COORD[2]}
             IFS=$OIFS
             ;;
         c)
             CLASSIFIER=$OPTARG
             ;;
         e)
             PACKAGING=$OPTARG
             ;;
         z)
             SNAPSHOT_CHECK=1
             ;;
         o)
             OUTPUT=$OPTARG
             ;;
         r)
             REPO=$OPTARG
             ;;
         u)
             USERNAME=$OPTARG
             ;;
         p)
             PASSWORD=$OPTARG
             ;;
         n)
             NEXUS_BASE=$OPTARG
             ;;
         ?)
             echo "Illegal argument $OPTION=$OPTARG" >&2
             usage
             exit
             ;;
     esac
done

if [[ -z $GROUP_ID ]] || [[ -z $ARTIFACT_ID ]] || [[ -z $VERSION ]]
then
     echo "BAD ARGUMENTS: Either groupId, artifactId, or version was not supplied" >&2
     usage
     exit 1
fi

# Define default values for optional components

# If we don't have set a repository and the version requested is a SNAPSHOT use snapshots, otherwise use releases
if [[ "$REPO" == "" ]]
then
        if [[ "$VERSION" =~ .*SNAPSHOT ]]
        then
                : ${REPO:="snapshots"}
        else
                : ${REPO:="releases"}
        fi
fi
# Construct the base URL
GROUP_ID_PATH=$(echo $GROUP_ID | tr . /)
BASE_URL=${NEXUS_BASE}/repository/${REPO}/${GROUP_ID_PATH}/${ARTIFACT_ID}/${VERSION}

# Construct URL's "basename"
if [[ "$VERSION" =~ .*SNAPSHOT ]]
then
    TIMESTAMPED_VERSION=$(curl -sS ${BASE_URL}/maven-metadata.xml | perl -ne 'if (m:<value>([^<]+)</value>:) { print $1; exit 0; }')
    BASENAME="${ARTIFACT_ID}-${TIMESTAMPED_VERSION}${CLASSIFIER}.${PACKAGING}"
else
    BASENAME="${ARTIFACT_ID}-${VERSION}${CLASSIFIER}.${PACKAGING}"
fi

URL="${BASE_URL}/${BASENAME}"

# Authentication
AUTHENTICATION=
if [[ "$USERNAME" != "" ]]  && [[ "$PASSWORD" != "" ]]
then
        AUTHENTICATION="-u $USERNAME:$PASSWORD"
fi

if [[ "$SNAPSHOT_CHECK" != "" ]]
then
  # remove $OUTPUT if nexus has newer version
  if [[ -f $OUTPUT ]] && [[ "$(curl -s ${URL} ${AUTHENTICATION} -I --location-trusted -z $OUTPUT -o /dev/null -w '%{http_code}' )" == "200" ]]
  then
    echo "Nexus has newer version of $GROUP_ID:$ARTIFACT_ID:$VERSION"
    rm $OUTPUT
  fi
  exit 0
fi

# Output
OUT=
if [[ "$OUTPUT" != "" ]]
then
        OUT="-o $OUTPUT"
fi

echo "Fetching Artifact from $REDIRECT_URL..." >&2
curl -sS ${URL} ${OUT} ${AUTHENTICATION} -R --location-trusted --fail

Hi,
While executing the above script , I am getting this error:
Fetching Artifact from ...
curl: (23) Failed writing body (0 != 1032)
I was unable to debug that!

do | tac at the end to get rid off that error