build-sys,man: use XML entities to substite strings

This makes it easier to add substitutions to man pages,
avoiding the separate transformation step.

mkdir -p's are removed from the rule, because xsltproc will
will create directories on it's own.

All in all, two or three forks per man page are avoided,
which should make things marginally faster.

Unfortunately python parsers must too be tweaked to handle
entities. This isn't particularly easy: with lxml a custom
Resolver can be used, but the stdlib etree doesn't support
external entities *at all*. So when running without lxml,
the entities are just removed. Right now it doesn't matter,
since the entities are not indexed anyway. But I intend to
add indexing of filenames in the near future, and then the
index generated without lxml might be missing a few lines.
Oh well.

1 files changed, 7 insertions, 9 deletions

diff --git a/make-man-index.py b/make-man-index.py
index d9ab5cc75..74a47b821 100755
--- a/make-man-index.py
+++ b/make-man-index.py
@@ -19,14 +19,10 @@
 #  along with systemd; If not, see <http://www.gnu.org/licenses/>.
 
 import collections
-try:
-    from lxml import etree as tree
-    PRETTY = dict(pretty_print=True)
-except ImportError:
-    import xml.etree.ElementTree as tree
-    PRETTY = {}
 import sys
 import re
+from xml_helper import *
+
 MDASH = ' — ' if sys.version_info.major >= 3 else ' -- '
 
 TEMPLATE = '''\
@@ -72,6 +68,7 @@ SUMMARY = '''\
 COUNTS = '\
 This index contains {count} entries, referring to {pages} individual manual pages.'
 
+
 def check_id(page, t):
     id = t.getroot().get('id')
     if not re.search('/' + id + '[.]', page):
@@ -80,7 +77,7 @@ def check_id(page, t):
 def make_index(pages):
     index = collections.defaultdict(list)
     for p in pages:
-        t = tree.parse(p)
+        t = xml_parse(p)
         check_id(p, t)
         section = t.find('./refmeta/manvolnum').text
         refname = t.find('./refnamediv/refname').text
@@ -123,7 +120,7 @@ def add_summary(template, indexpages):
     para = template.find(".//para[@id='counts']")
     para.text = COUNTS.format(count=count, pages=len(pages))
 
-def make_page(xml_files):
+def make_page(*xml_files):
     template = tree.fromstring(TEMPLATE)
     index = make_index(xml_files)
 
@@ -135,4 +132,5 @@ def make_page(xml_files):
     return template
 
 if __name__ == '__main__':
-    tree.dump(make_page(sys.argv[1:]), **PRETTY)
+    with open(sys.argv[1], 'wb') as f:
+        f.write(xml_print(make_page(*sys.argv[2:])))