From 84c69dfe2d56f87d6cfdaf9c8b7e5e3a9b3d2619 Mon Sep 17 00:00:00 2001
From: Dirk Baechle <dl9obn@darc.de>
Date: Fri, 19 Jun 2020 19:30:53 +0200
Subject: Added a specialized Manpage builder for lxml (Docbook).

---
 SCons/Tool/docbook/__init__.py | 34 ++++++++++++++++++++++++++++++++--
 1 file changed, 32 insertions(+), 2 deletions(-)

diff --git a/SCons/Tool/docbook/__init__.py b/SCons/Tool/docbook/__init__.py
index 3b725da..c3a4610 100644
--- a/SCons/Tool/docbook/__init__.py
+++ b/SCons/Tool/docbook/__init__.py
@@ -299,7 +299,6 @@ def __build_lxml(target, source, env):
         result = transform(doc)
 
     try:
-# TODO DB Check file encoding for unicode/utf-8
         with open(str(target[0]), "wb") as of:
             of.write(etree.tostring(result, encoding="utf-8", pretty_print=True))
     except:
@@ -307,6 +306,31 @@ def __build_lxml(target, source, env):
 
     return None
 
+def __build_lxml_manpage(target, source, env):
+    """
+    Specialized XSLT builder for manpages, using the lxml module.
+    """
+    from lxml import etree
+
+    xslt_ac = etree.XSLTAccessControl(read_file=True,
+                                      write_file=True,
+                                      create_dir=True,
+                                      read_network=False,
+                                      write_network=False)
+    xsl_style = env.subst('$DOCBOOK_XSL')
+    xsl_tree = etree.parse(xsl_style)
+    transform = etree.XSLT(xsl_tree, access_control=xslt_ac)
+    doc = etree.parse(str(source[0]))
+    # Support for additional parameters
+    parampass = {}
+    if parampass:
+        result = transform(doc, **parampass)
+    else:
+        result = transform(doc)
+
+    return None
+
+
 def __xinclude_lxml(target, source, env):
     """
     Resolving XIncludes, using the lxml module.
@@ -329,6 +353,12 @@ __lxml_builder = SCons.Builder.Builder(
         source_scanner = docbook_xml_scanner,
         emitter = __emit_xsl_basedir)
 
+__lxml_manpage_builder = SCons.Builder.Builder(
+        action = __build_lxml_manpage,
+        src_suffix = '.xml',
+        source_scanner = docbook_xml_scanner,
+        emitter = __emit_xsl_basedir)
+
 __xinclude_lxml_builder = SCons.Builder.Builder(
         action = __xinclude_lxml,
         suffix = '.xml',
@@ -574,7 +604,7 @@ def DocbookMan(env, target, source=None, *args, **kw):
     __init_xsl_stylesheet(kw, env, '$DOCBOOK_DEFAULT_XSL_MAN', ['manpages','docbook.xsl'])
 
     # Setup builder
-    __builder = __select_builder(__lxml_builder, __xsltproc_builder)
+    __builder = __select_builder(__lxml_manpage_builder, __xsltproc_builder)
 
     # Create targets
     result = []
-- 
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