[PATCH] 0.11 Compatibility Patch

[airadier@…]

Hi,

projectmenu plugin doesn't work in Trac 0.11. Calling add_script in get_navigation_items enters an infinite recursive call.

Attached is a patch to fix this, and make it work in Trac 0.11

[airadier@…]

Patch for web_ui.py, 0.11 Compatibility

[alvaro.iradier@…]

Updated patch (includes additional required modifcations)

[fermulator]

Which web_ui.py should this be applied to?

If we run a:

find . | grep web_ui.py

we receive several instances ...

./trac/search/web_ui.pyc
./trac/search/web_ui.py
./trac/prefs/web_ui.pyc
./trac/prefs/web_ui.py
./trac/admin/web_ui.pyc
./trac/admin/web_ui.py
./trac/timeline/web_ui.pyc
./trac/timeline/web_ui.py
./trac/ticket/web_ui.pyc
./trac/ticket/web_ui.py
./trac/wiki/web_ui.pyc
./trac/wiki/web_ui.py
./patches_and_diffs/projectmenuplugin/web_ui.py.diff

[alvaro.iradier@…]

Sorry, it applies to the web_ui.py file in the ProjectMenu plugin, not in the trac core.

[fermulator]

FYI: I ran:

patch -p0 < web_ui.py.diff

then received the following results:

patching file web_ui.py
Hunk #1 succeeded at 1 with fuzz 2.
Hunk #2 FAILED at 10.
Hunk #3 succeeded at 27 (offset -1 lines).
Hunk #4 succeeded at 35 (offset -1 lines).
1 out of 4 hunks FAILED -- saving rejects to file web_ui.py.rej

The reject file web_ui.py.rej looks as follows:

***************
*** 9,16 ****

  class ProjectMenuModule(Component):

!     implements(INavigationContributor, ITemplateProvider)

      # INavigationProvider methods
      def get_navigation_items(self, req):
          projects = []
--- 10,25 ----

  class ProjectMenuModule(Component):

!     implements(INavigationContributor, ITemplateProvider, IRequestFilter)

+     # IRequestFilter methods
+     def pre_process_request(self, req, handler):
+         add_script(req, 'projectmenu/projectmenu.js')
+         return handler
+
+     def post_process_request(self, req, template, content_type):
+         return(template, content_type)
+
      # INavigationProvider methods
      def get_navigation_items(self, req):
          projects = []

Even with the rejected hunk I still tried to install it, and it works!
Is this missing code important?...

[fermulator]

OK I was wrong, it doesn't work ...

The menu itself shows up, but clicking on a project doesn't do anything

[fermulator]

Well! Clearly the IRequestFilter was required :-)

Although that hunk failed, I manually changed the line:

implements(INavigationContributor, ITemplateProvider)

to

implements(INavigationContributor, ITemplateProvider, IRequestFilter)

and immediately following I added the lines:

    # IRequestFilter methods
    def pre_process_request(self, req, handler):
        add_script(req, 'projectmenu/projectmenu.js')
        return handler
    def post_process_request(self, req, template, content_type):
        return(template, content_type)

Then ran:

sudo easy_install -U .

And it works! Most excellent.

[fermulator]

Alright so after more analysis unfortunately this doesn't work. Something about the patched code there causes a massive slowdown in trac.

Pages would sometimes take upwards of 20 seconds to load instead of the usual 2 seconds (at most). Running a dual core server caused 100% CPU load on both processors for EVERY page refresh (i.e. every time it called the ProjectMenuPlugin code since it shows on every page ... )

Any ideas coderanger/airadier?

[coderanger]

In the call to open_environment, add the argument use_cache=True. Otherwise it loads every environment off disk each time and will be, as you said, insanely slow.

[airadier]

Great, I didn't know use_cache parameter was possible. I also noticed a slow down when the number of existing projects increased. Was this caused by my patch, or was it in the original plugin?

[fermulator]

Updated web_ui.py.diff for 0.11 & environment caching

[fermulator]

So I've just added an updated diff file: web_ui.py.2.diff​

This contains the changes as per the previous diffs, as well as the addition to use the cache when calling the environments.

airradier, do you plan to incorporate this patch into the trunk to fully support 0.11?

[airadier]

I'm not the mantainer, I just made the patches for 0.11. I guess coderanger should merge them if he thinks they are right.

[wbranderson@…]

All of the *.diff files are empty ... where have the patches gone?

[coderanger]

Replying to wbranderson@gmail.com:

All of the *.diff files are empty ... where have the patches gone?

Use the "Original Format" link at the bottom of the page. It's an old bug in Trac that can't render some diffs.

[wbranderson@…]

After applying the diff and restarting trac, I received the following error:

Traceback (most recent call last):
  File "c:\python24\lib\site-packages\Trac-0.11rc1-py2.4.egg\trac\web\api.py", line 339, in send_error
    'text/html')
  File "c:\python24\lib\site-packages\Trac-0.11rc1-py2.4.egg\trac\web\chrome.py", line 684, in render_template
    data = self.populate_data(req, data)
  File "c:\python24\lib\site-packages\Trac-0.11rc1-py2.4.egg\trac\web\chrome.py", line 592, in populate_data
    d['chrome'].update(req.chrome)
  File "c:\python24\lib\site-packages\Trac-0.11rc1-py2.4.egg\trac\web\api.py", line 168, in __getattr__
    value = self.callbacks[name](self)
  File "c:\python24\lib\site-packages\Trac-0.11rc1-py2.4.egg\trac\web\chrome.py", line 460, in prepare_request
    for category, name, text in contributor.get_navigation_items(req):
  File "build\bdist.win32\egg\projectmenu\web_ui.py", line 29, in get_navigation_items
  File "c:\python24\lib\site-packages\Trac-0.11rc1-py2.4.egg\trac\env.py", line 561, in open_environment
    env = env_cache.setdefault(env_path, open_environment(env_path))
  File "c:\python24\lib\site-packages\Trac-0.11rc1-py2.4.egg\trac\env.py", line 565, in open_environment
    env = Environment(env_path)
  File "c:\python24\lib\site-packages\Trac-0.11rc1-py2.4.egg\trac\env.py", line 190, in __init__
    self.verify()
  File "c:\python24\lib\site-packages\Trac-0.11rc1-py2.4.egg\trac\env.py", line 243, in verify
    fd = open(os.path.join(self.path, 'VERSION'), 'r')
IOError: [Errno 2] No such file or directory: 'X:\\Path\\To\\Trac\\Installation\\trac.ini\\VERSION'

Any thoughts? I have Multiple environments installed at 'X:
Path
To
Trac
Installation
', but the folder itself is not an environment. Do I need to have a parent project? And if so, how to I set this up?

[kmx]

Your (wbranderson@…) error is caused by existing files in the directory where your multiple Trac project subdirs are located.

It can be easily fixed by the following patch:

         for project in os.listdir(search_path):
-            if project != this_project:
+            if project != this_project and os.path.isdir(os.path.join(search_path, project)):
                 proj_env = open_environment(os.path.join(search_path, project),use_cache=True)

[wbranderson@…]

Yea, I fixed the problem shortly after posting the ticket. All is well. Thanks for the help.

Replying to kmx:

Your (wbranderson@…) error is caused by existing files in the directory where your multiple Trac project subdirs are located.

It can be easily fixed by the following patch:

         for project in os.listdir(search_path):
-            if project != this_project:
+            if project != this_project and os.path.isdir(os.path.join(search_path, project)):
                 proj_env = open_environment(os.path.join(search_path, project),use_cache=True)

[anonymous]

Is there an intent to create a 0.11 compatible install anytime soon ?

[didoux]

Replying to anonymous:

Is there an intent to create a 0.11 compatible install anytime soon ?

... apparently not(?) ...too bad!

[anonymous]

trac-0.12.2

1. patch web_ui.py.2.diff(this ticket)
   • "?format=raw" url query is needed
   • http://trac-hacks.org/attachment/ticket/1892/web_ui.py.2.diff?format=raw
2. patch comment:14 and modify like below

                if project != this_project and os.path.isdir(os.path.join(search_path, project)) and project[0] != '.':"
   

   • e.g. ".egg-cache"

[anonymous]

After applying web_ui.py.2.diff to trac-0.12.2, I received the following warning:

 Trac[chrome] WARNING: Error with navigation contributor ProjectMenuModule