#!/bin/sh

# Script to check for catalogs, stylesheets, XSL processors and all
# the other stuff necessary to convert the XML documentation.

_xsltwrapper="xsltproc.sh"
_xmllintwrapper="xmllint.sh"

for _try_catalog in /etc/sgml/catalog /usr/share/sgml/docbook/xml-dtd-4.1.2/xmlcatalog /usr/share/apps/ksgmltools2/customization/en/catalog /usr/share/sgml/catalog /usr/local/share/sgml/catalog /usr/lib/sgml/catalog /usr/local/lib/sgml/catalog
do
  if test -f "$_try_catalog"
  then
    _catalog=$_try_catalog
    break
  fi
done

if test -n "$_catalog"
then
  echo "Found SGML catalog at $_catalog"
  _sgmlcatalog="export SGML_CATALOG_FILES=$_catalog"
else
  echo "No SGML catalog found."
fi



echo "Searching for stylesheet..."
for _try_chunk_xsl in /usr/share/sgml/docbook/stylesheet/xsl/nwalsh/html/chunk.xsl /usr/share/sgml/docbook/yelp/docbook/html/chunk.xsl /usr/local/share/sgml/docbook/stylesheet/xsl/nwalsh/html/chunk.xsl /usr/local/share/sgml/docbook/yelp/docbook/html/chunk.xsl
do
  if test -f "$_try_chunk_xsl"
  then
    _chunk_xsl=$_try_chunk_xsl
    break
  fi
done

if test -z "$_chunk_xsl"
then
  echo "Not found."
  _chunk_xsl=/usr/share/sgml/docbook/stylesheet/xsl/nwalsh/html/chunk.xsl
else
  echo "Found chunk.xsl at $_chunk_xsl"
fi

cat > html.xsl << EOF
<?xml version="1.0" encoding="ISO-8859-1"?>
<!-- **************************************************
     This file is generated automatically. DO NOT EDIT.
     ************************************************** -->
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                version="1.0">

  <xsl:import href="$_chunk_xsl"/>
  <xsl:include href="html-common.xsl"/>

</xsl:stylesheet>
EOF



echo "Looking for a valid XSLT processor..."
# Checks for xsltproc, then checks for the Saxon processor (it needs Java).
# Also checks for Jade/OpenJade.
#FIXME: Add support for the xalan/xalan2 XSLT processors.

if xsltproc --version &> /dev/null
then
  if test -n "$_chunk_xsl"
  then
    echo "Found xsltproc. If it works, it's probably the best choice."
    if test -n "$_catalog"
    then
      _xsltcommand="xsltproc --catalogs -o \$1 \$2 \$3"
    else
      _xsltcommand="xsltproc -o \$1 \$2 \$3"
    fi
  else
    echo "Found xsltproc but no stylesheets on your system."
    echo "xsltproc is unusable without stylesheets."
  fi
fi

# xsltproc not found.
# Now try to find a good Java virtual machine.
# FIXME: We need more checks for Java virtual machines.
if test -z "$_xsltcommand"
then
  for _try_java in java gij-3.3 gij-3.2 gij-3.1 gij-3.0 gij
  do
    if $_try_java --version > /dev/null 2>&1 || $_try_java -version > /dev/null 2>&1
    then
      _java=$_try_java
      break
    fi
  done
  if test -z "$_java"
  then
    echo "Java VM not found."
  else
    # Try to find the right jar files for classpath.
    # This must not trigger on something like saxon-fop-6.4.4.jar.
    for _try_saxon_jar in /usr/share/java/saxon.jar /usr/local/share/java/saxon.jar /usr/share/java/saxon-[0-9]*.jar /usr/local/share/java/saxon-[0-9]*.jar
    do
      if test -f "$_try_saxon_jar"
      then
        _saxon_jar=$_try_saxon_jar
        #Don't break to find the _latest_ saxon.jar.
      fi
    done
    if test -n "$_saxon_jar"
    then
      if test -n "$_chunk_xsl"
      then
        _xsltcommand="cd \$1 && if test \"\`dirname \$2 | head -c 1\`\" = \".\" ; then $_java  -classpath $_saxon_jar com.icl.saxon.StyleSheet \$_IN_DIR/\$3 \$_IN_DIR/\$2 ; else $_java  -classpath $_saxon_jar com.icl.saxon.StyleSheet \$_IN_DIR/\$3 \$2 ;fi"
        echo "Found the Saxon XSLT Processor ($_saxon_jar), using Java VM '$_java'."
      else
        echo "Found the Saxon XSLT processor but no stylesheets on your system."
        echo "Saxon is unusable without stylesheets."
      fi
    fi
  fi
fi

if test -z "$_xsltcommand"
then
  # Java not found.
  # now try openjade/jade.
  for _try_jade in jade openjade
  do
    if command -v $_try_jade > /dev/null
    then
      _jade=$_try_jade
      break
    fi
  done
  if test -n "$_jade"
  then
    echo "xsltproc and Saxon XSLT processors not found."
    echo "I will try to use OpenJade or Jade (using '$_jade')."
    echo "They aren't (currently) fully supported, however."
    for _try_docbook_dsl in /usr/share/sgml/docbook/stylesheet/dsssl/modular/html/docbook.dsl /usr/local/share/sgml/docbook/stylesheet/dsssl/modular/html/docbook.dsl 
    do
      if test -f "$_try_docbook_dsl"
      then
        _docbook_dsl=$_try_docbook_dsl
        break
      fi
    done
    for _try_xml_dcl in /usr/share/sgml/declaration/xml.dcl /usr/local/share/sgml/declaration/xml.dcl
    do
      if test -f "$_try_xml_dcl"
      then
        _xml_dcl=$_try_xml_dcl
        break
      fi
    done
      if test "x$_docbook_dsl" = "x" -o "x$_xml_dcl" = "x"
      then
  	echo "One of the files docbook.dsl and xml.dcl or both of them weren't found."
  	echo "Bailing out."
  	exit 1
      fi
    _xsltcommand="cd \$1 && $_jade -t xml -d $_docbook_dsl $_xml_dcl \$_IN_DIR/\$3"
  else
    echo "No valid XSLT processor found."
    echo "Bailing out."
    exit 1
  fi
fi



cat > $_xsltwrapper << EOF
#!/bin/sh
# **************************************************
# This file is generated automatically. DO NOT EDIT.
# **************************************************
# This is a small wrapper script around many ways to call the XSLT processor.
# It accepts 3 arguments: <output_dir> <stylesheet_name> <main XML file name>
_IN_DIR=\`pwd\`

$_sgmlcatalog
$_xsltcommand
EOF

chmod +x $_xsltwrapper



for _try_xmllint in xmllint
do
  if command -v $_try_xmllint
  then
    if test -n "$_catalog"
    then
      _xmllint_command="$_try_xmllint --noout --noent --postvalid --catalogs \$*"
    else
      _xmllint_command="$_try_xmllint --noout --noent --postvalid \$*"
    fi
    break
  fi
done

if test -z "$_xmllint_command"
then
  _xmllint_command=true
fi

cat > $_xmllintwrapper << EOF
#!/bin/sh
# **************************************************
# This file is generated automatically. DO NOT EDIT.
# **************************************************
# This is a small wrapper for XML lintian programs.
$_sgmlcatalog
$_xmllint_command
EOF

chmod +x $_xmllintwrapper