xsdvalidate

#!/bin/sh

xml_file=$1

shift

# Show usage if no arguments are provided
if [ -z "$xml_file" ]; then
    echo "Validate an XML file against its schema"
    echo ""
    echo "Usage: $0 <xml_file> [additional options to pass to xmllint]"
    echo "If xml_file is -, read from standard input"
    exit 1
fi

# Check if xmllint is available
if ! command -v xmllint &> /dev/null
then
    echo "xmllint could not be found"
    exit 1
fi

tmp_file=""
# If xml_file is -, read the file to check from standard input to a temporary file
if [ "$xml_file" = "-" ]; then
    tmp_file=$(mktemp)
    if [ -z "$tmp_file" ]; then
        echo "Could not create temporary file"
        exit 1
    fi
    cat > "$tmp_file"
    xml_file="$tmp_file"
fi

# Get the namespace of the root element
root_namespace=$(xmllint $xml_file --nonet --noout --xpath "namespace-uri(/child::*)")
if [ -z "$root_namespace" ]; then
    echo "Could not determine the namespace of the root element"
    if [ -n "$tmp_file" ]; then
        rm "$tmp_file"
    fi
    exit 1
fi
echo "Validating against $root_namespace"

# Validating requires the schema namespace to be present in the system XML catalog

# Show command being run
echo "xmllint $xml_file --nonet --noout --schema $root_namespace ${@}"
xmllint "$xml_file" --nonet --noout --schema "$root_namespace" "${@}" 2>&1

# Clean up
if [ -n "$tmp_file" ]; then
    rm "$tmp_file"
fi

exit 0