Fix #2445: rst_prolog and rst_epilog affect to non reST sources

CHANGES

@@ -64,6 +64,7 @@ Bugs fixed
 * #2561: Info builder crashes when a footnote contains a link
 * #2565: The descriptions of objects generated by ``sphinx.ext.autosummary`` overflow lines at LaTeX writer
 * Extend pdflatex config in sphinx.sty to subparagraphs (ref: #2551)
+* #2445: `rst_prolog` and `rst_epilog` affect to non reST sources
 
 
 Release 1.4.1 (released Apr 12, 2016)

sphinx/io.py

@@ -112,14 +112,26 @@ class SphinxFileInput(FileInput):
         return data.decode(self.encoding, 'sphinx')  # py2: decoding
 
     def read(self):
+        def get_parser_type(docname):
+            path = self.env.doc2path(docname)
+            for suffix in self.env.config.source_parsers:
+                if path.endswith(suffix):
+                    parser_class = self.env.config.source_parsers[suffix]
+                    if isinstance(parser_class, string_types):
+                        parser_class = import_object(parser_class, 'source parser')
+                    return parser_class.supported
+            else:
+                return ('restructuredtext',)
+
         data = FileInput.read(self)
         if self.app:
             arg = [data]
             self.app.emit('source-read', self.env.docname, arg)
             data = arg[0]
         docinfo, data = split_docinfo(data)
-        if self.env.config.rst_epilog:
-            data = data + '\n' + self.env.config.rst_epilog + '\n'
-        if self.env.config.rst_prolog:
-            data = self.env.config.rst_prolog + '\n' + data
+        if 'restructuredtext' in get_parser_type(self.env.docname):
+            if self.env.config.rst_epilog:
+                data = data + '\n' + self.env.config.rst_epilog + '\n'
+            if self.env.config.rst_prolog:
+                data = self.env.config.rst_prolog + '\n' + data
         return docinfo + data

tests/roots/test-prolog/conf.py

@@ -1,3 +1,12 @@
+# -*- coding: utf-8 -*-
+
+import os
+import sys
+sys.path.insert(0, os.path.abspath('.'))
+
+
 master_doc = 'index'
+extensions = ['prolog_markdown_parser']
+
 rst_prolog = '*Hello world*.\n\n'
 rst_epilog = '\n\n*Good-bye world*.'

tests/roots/test-prolog/index.rst

@@ -1,2 +1,7 @@
 prolog and epilog
 =================
+
+.. toctree::
+
+   restructuredtext
+   markdown

tests/roots/test-prolog/markdown.md

@@ -0,0 +1,3 @@
+# sample document
+
+This is a sample document in markdown

tests/roots/test-prolog/prolog_markdown_parser.py

@@ -0,0 +1,12 @@
+# -*- coding: utf-8 -*-
+
+from docutils.parsers import Parser
+
+
+class DummyMarkdownParser(Parser):
+    def parse(self, inputstring, document):
+        document.rawsource = inputstring
+
+
+def setup(app):
+    app.add_source_parser('.md', DummyMarkdownParser)

tests/roots/test-prolog/restructuredtext.rst

@@ -0,0 +1,4 @@
+sample document
+===============
+
+This is a sample document in reST

tests/test_markup.py

@@ -148,17 +148,22 @@ def test_latex_escaping():
 @with_app(buildername='dummy', testroot='prolog')
 def test_rst_prolog(app, status, warning):
     app.builder.build_all()
-    doctree = pickle.loads((app.doctreedir / 'index.doctree').bytes())
+    rst = pickle.loads((app.doctreedir / 'restructuredtext.doctree').bytes())
+    md = pickle.loads((app.doctreedir / 'markdown.doctree').bytes())
 
     # rst_prolog
-    assert_node(doctree[0], nodes.paragraph)
-    assert_node(doctree[0][0], nodes.emphasis)
-    assert_node(doctree[0][0][0], nodes.Text)
-    assert doctree[0][0][0] == 'Hello world'
+    assert_node(rst[0], nodes.paragraph)
+    assert_node(rst[0][0], nodes.emphasis)
+    assert_node(rst[0][0][0], nodes.Text)
+    assert rst[0][0][0] == 'Hello world'
 
     # rst_epilog
-    assert_node(doctree[-1], nodes.section)
-    assert_node(doctree[-1][-1], nodes.paragraph)
-    assert_node(doctree[-1][-1][0], nodes.emphasis)
-    assert_node(doctree[-1][-1][0][0], nodes.Text)
-    assert doctree[-1][-1][0][0] == 'Good-bye world'
+    assert_node(rst[-1], nodes.section)
+    assert_node(rst[-1][-1], nodes.paragraph)
+    assert_node(rst[-1][-1][0], nodes.emphasis)
+    assert_node(rst[-1][-1][0][0], nodes.Text)
+    assert rst[-1][-1][0][0] == 'Good-bye world'
+
+    # rst_prolog & rst_epilog on exlucding reST parser
+    assert not md.rawsource.startswith('*Hello world*.')
+    assert not md.rawsource.endswith('*Good-bye world*.\n')