Compilers must explicitly state that they use the .dep file for it to be always created and added as a target.

felixfontein · felixfontein · commit 022dbec9b2e5 · 2016-10-29T12:53:01.000+02:00
diff --git a/nikola/plugin_categories.py b/nikola/plugin_categories.py
@@ -250,6 +250,7 @@ class PageCompiler(BasePlugin):
     friendly_name = ''
     demote_headers = False
     supports_onefile = True
+    use_dep_file = False  # If set to true, the .dep file is always written and added as a target
     default_metadata = {
         'title': '',
         'slug': '',
@@ -277,7 +278,10 @@ def register_extra_dependencies(self, post):
 
     def get_extra_targets(self, post, lang, dest):
         """Return a list of extra targets for the render_posts task when compiling the post for the specified language."""
-        return []
+        if self.use_dep_file:
+            return [post.base_path + '.dep']
+        else:
+            return []
 
     def compile(self, source, dest, is_two_file=True, post=None, lang=None):
         """Compile the source file into HTML and save as dest."""
diff --git a/nikola/plugins/compile/html.py b/nikola/plugins/compile/html.py
@@ -40,6 +40,7 @@ class CompileHtml(PageCompiler):
 
     name = "html"
     friendly_name = "HTML"
+    use_dep_file = True
 
     def compile(self, source, dest, is_two_file=True, post=None, lang=None):
         """Compile the source file into HTML and save as dest."""
diff --git a/nikola/plugins/compile/ipynb.py b/nikola/plugins/compile/ipynb.py
@@ -70,6 +70,7 @@ class CompileIPynb(PageCompiler):
     name = "ipynb"
     friendly_name = "Jupyter/IPython Notebook"
     demote_headers = True
+    use_dep_file = True
     default_kernel = 'python2' if sys.version_info[0] == 2 else 'python3'
 
     def set_site(self, site):
diff --git a/nikola/plugins/compile/markdown/__init__.py b/nikola/plugins/compile/markdown/__init__.py
@@ -49,6 +49,7 @@ class CompileMarkdown(PageCompiler):
     name = "markdown"
     friendly_name = "Markdown"
     demote_headers = True
+    use_dep_file = True
     extensions = []
     site = None
 
diff --git a/nikola/plugins/compile/pandoc.py b/nikola/plugins/compile/pandoc.py
@@ -44,6 +44,7 @@ class CompilePandoc(PageCompiler):
 
     name = "pandoc"
     friendly_name = "pandoc"
+    use_dep_file = True
 
     def set_site(self, site):
         """Set Nikola site."""
diff --git a/nikola/plugins/compile/rest/__init__.py b/nikola/plugins/compile/rest/__init__.py
@@ -57,6 +57,7 @@ class CompileRest(PageCompiler):
     name = "rest"
     friendly_name = "reStructuredText"
     demote_headers = True
+    use_dep_file = True
     logger = None
 
     def compile_string(self, data, source_path=None, is_two_file=True):
diff --git a/nikola/plugins/task/posts.py b/nikola/plugins/task/posts.py
@@ -84,14 +84,13 @@ def tl_ch():
                         k = p.split('####MAGIC####CONFIG:', 1)[-1]
                         deps_dict[k] = self.site.config.get(k)
                 dest = post.translated_base_path(lang)
-                dep_file = dest + '.dep'
                 file_dep = [p for p in post.fragment_deps(lang) if not p.startswith("####MAGIC####")]
                 extra_targets = post.compiler.get_extra_targets(post, lang, dest)
                 task = {
                     'basename': self.name,
                     'name': dest,
                     'file_dep': file_dep,
-                    'targets': [dest, dep_file] + extra_targets,
+                    'targets': [dest] + extra_targets,
                     'actions': [(post.compile, (lang, )),
                                 (update_deps, (post, lang, )),
                                 ],
diff --git a/nikola/post.py b/nikola/post.py
@@ -464,9 +464,13 @@ def register_depfile(self, dep, dest=None, lang=None):
     def write_depfile(dest, deps_list):
         """Write a depfile for a given language."""
         deps_path = dest + '.dep'
-        deps_list = [p for p in deps_list if p != dest]  # Don't depend on yourself (#1671)
-        with io.open(deps_path, "w+", encoding="utf8") as deps_file:
-            deps_file.write('\n'.join(deps_list))
+        if deps_list or self.compiler.use_dep_file:
+            deps_list = [p for p in deps_list if p != dest]  # Don't depend on yourself (#1671)
+            with io.open(deps_path, "w+", encoding="utf8") as deps_file:
+                deps_file.write('\n'.join(deps_list))
+        else:
+            if os.path.isfile(deps_path):
+                os.unlink(deps_path)
 
     def _get_dependencies(self, deps_list):
         deps = []
