#!/bin/bash

# nothing to do if schema file not given

if [ -z "$1" ]; then

echo "Usage: $0 <schema> [<path>...]"

exit

fi

SCHEMA=$1; shift

LOGFILE=$(pwd)/xml_validation_results.log

# "-r" in GNU xargs omits the call if input is empty

# OS X xargs does not support it, but does the same by default

if [ "$(uname)" == "Darwin" ]; then

XARGS="xargs"

else

XARGS="xargs -r"

fi

# check if xmllint is present

if ! hash xmllint &> /dev/null; then

>&2 echo "Error: xmllint is required to validate xml files"

exit

fi

abs_path ()

{

if [ "$#" -gt 0 ]; then

realpath "$@"

fi

}

list_xml_files_at_path()

{

abs_path $(find . -type f -name "*.xml" -not -path "*/\.*")

}

# create/nullify the log file

echo -n > $LOGFILE

# validate each path separately and write results in the log

for path in "$@"; do

# emit location and check directory

echo "Validating in directory: $path"

if [ ! -d "$path" ]; then

echo "Directory not found: $path" >&2

exit 1

fi

cd "$path" || continue

collected_xml_files=$(list_xml_files_at_path)

if [ -z "$collected_xml_files" ]; then

echo "No XML files found in: $path"

continue

fi

for xml_file in $collected_xml_files; do

xmllint --schema $SCHEMA --noout "$xml_file" >> $LOGFILE 2>&1

if [ $? -ne 0 ]; then

echo "Validation failed for $xml_file" >> $LOGFILE

fi

done

done

# print any failed validations on the stderr

grep -v validates $LOGFILE >&2

# if there are failed validations, message and return the status

if grep -q -v validates $LOGFILE; then

>&2 echo "XML validation failed. See details in $LOGFILE"

exit 1

fi