Fix #656: Add `graphviz_dot option to graphviz directives to switch the dot` command

CHANGES

@@ -42,6 +42,7 @@ Features added
 * #1030: Make page reference names for latex_show_pagerefs translatable
 * #2162: Add Sphinx.add_source_parser() to add source_suffix and source_parsers from extension
 * #2207: Add sphinx.parsers.Parser class; a base class for new parsers
+* #656: Add ``graphviz_dot`` option to graphviz directives to switch the ``dot`` command
 
 Bugs fixed
 ----------

doc/ext/graphviz.rst

@@ -87,6 +87,10 @@ It adds these directives:
    caption to the diagram.  Naturally, diagrams marked as "inline" cannot have a
    caption.
 
+.. versionchanged:: 1.4
+   All three directives support a ``graphviz_dot`` option that can be switch the
+   ``dot`` command within the directive.
+
 There are also these new config values:
 
 .. confval:: graphviz_dot

sphinx/ext/graphviz.py

@@ -66,6 +66,7 @@ class Graphviz(Directive):
         'alt': directives.unchanged,
         'inline': directives.flag,
         'caption': directives.unchanged,
+        'graphviz_dot': directives.unchanged,
     }
 
     def run(self):
@@ -96,7 +97,9 @@ class Graphviz(Directive):
                     line=self.lineno)]
         node = graphviz()
         node['code'] = dotcode
-        node['options'] = []
+        node['options'] = {}
+        if 'graphviz_dot' in self.options:
+            node['options']['graphviz_dot'] = self.options['graphviz_dot']
         if 'alt' in self.options:
             node['alt'] = self.options['alt']
         if 'inline' in self.options:
@@ -121,13 +124,16 @@ class GraphvizSimple(Directive):
         'alt': directives.unchanged,
         'inline': directives.flag,
         'caption': directives.unchanged,
+        'graphviz_dot': directives.unchanged,
     }
 
     def run(self):
         node = graphviz()
         node['code'] = '%s %s {\n%s\n}\n' % \
                        (self.name, self.arguments[0], '\n'.join(self.content))
-        node['options'] = []
+        node['options'] = {}
+        if 'graphviz_dot' in self.options:
+            node['options']['graphviz_dot'] = self.options['graphviz_dot']
         if 'alt' in self.options:
             node['alt'] = self.options['alt']
         if 'inline' in self.options:
@@ -142,8 +148,8 @@ class GraphvizSimple(Directive):
 
 def render_dot(self, code, options, format, prefix='graphviz'):
     """Render graphviz code into a PNG or PDF output file."""
-    hashkey = (code + str(options) +
+    graphviz_dot = options.get('graphviz_dot', self.builder.config.graphviz_dot)
-               str(self.builder.config.graphviz_dot) +
+    hashkey = (code + str(options) + str(graphviz_dot) +
                str(self.builder.config.graphviz_dot_args)).encode('utf-8')
 
     fname = '%s-%s.%s' % (prefix, sha1(hashkey).hexdigest(), format)
@@ -153,7 +159,8 @@ def render_dot(self, code, options, format, prefix='graphviz'):
     if path.isfile(outfn):
         return relfn, outfn
 
-    if hasattr(self.builder, '_graphviz_warned_dot'):
+    if (hasattr(self.builder, '_graphviz_warned_dot') and
+       self.builder._graphviz_warned_dot[graphviz_dot]):
         return None, None
 
     ensuredir(path.dirname(outfn))
@@ -162,9 +169,8 @@ def render_dot(self, code, options, format, prefix='graphviz'):
     if isinstance(code, text_type):
         code = code.encode('utf-8')
 
-    dot_args = [self.builder.config.graphviz_dot]
+    dot_args = [graphviz_dot]
     dot_args.extend(self.builder.config.graphviz_dot_args)
-    dot_args.extend(options)
     dot_args.extend(['-T' + format, '-o' + outfn])
     if format == 'png':
         dot_args.extend(['-Tcmapx', '-o%s.map' % outfn])
@@ -174,9 +180,10 @@ def render_dot(self, code, options, format, prefix='graphviz'):
         if err.errno != ENOENT:   # No such file or directory
             raise
         self.builder.warn('dot command %r cannot be run (needed for graphviz '
-                          'output), check the graphviz_dot setting' %
+                          'output), check the graphviz_dot setting' % graphviz_dot)
-                          self.builder.config.graphviz_dot)
+        if not hasattr(self.builder, '_graphviz_warned_dot'):
-        self.builder._graphviz_warned_dot = True
+            self.builder._graphviz_warned_dot = {}
+        self.builder._graphviz_warned_dot[graphviz_dot] = True
         return None, None
     try:
         # Graphviz may close standard input when an error occurs,

tests/roots/test-ext-graphviz/index.rst

@@ -11,3 +11,8 @@ graphviz
            bar -> baz
 
 Hello |graph| graphviz world
+
+.. digraph:: foo
+   :graphviz_dot: neato
+
+   bar -> baz