nixpkgs/pkgs/build-support/setup-hooks/find-xml-catalogs.sh

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addXMLCatalogs () {
local d i
# xml/dtd and xml/xsl are deprecated. Catalogs should be
# installed underneath share/xml.
for d in $1/share/xml $1/xml/dtd $1/xml/xsl; do
if [ -d $d ]; then
for i in $(find $d -name catalog.xml); do
XML_CATALOG_FILES+=" $i"
done
fi
done
}
if [ -z "${libxmlHookDone-}" ]; then
libxmlHookDone=1
# Set up XML_CATALOG_FILES. An empty initial value prevents
# xmllint and xsltproc from looking in /etc/xml/catalog.
export XML_CATALOG_FILES=''
if [ -z "$XML_CATALOG_FILES" ]; then XML_CATALOG_FILES=" "; fi
addEnvHooks "$hostOffset" addXMLCatalogs
fi