id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
20780	collectstatic --link causes IOError when dangling symlink exists	Diederik van der Boor	John Giannelos	"When a symlink file already exists, but it's source was moved/renamed, `collectstatic` ends with an `IOError`.

Here is a trackback example:

{{{
Linking '/srv/www/virtualenvs/demo.example.org/src/django-filebrowser-no-grappelli-django14/filebrowser/static/filebrowser/js/FB_TinyMCE.js'
Traceback (most recent call last):
  File ""manage.py"", line 10, in <module>
    execute_from_command_line(sys.argv)
  File ""/srv/www/virtualenvs/demo.example.org/lib/python2.6/site-packages/django/core/management/__init__.py"", line 443, in execute_from_command_line
    utility.execute()
  File ""/srv/www/virtualenvs/demo.example.org/lib/python2.6/site-packages/django/core/management/__init__.py"", line 382, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File ""/srv/www/virtualenvs/demo.example.org/lib/python2.6/site-packages/django/core/management/base.py"", line 196, in run_from_argv
    self.execute(*args, **options.__dict__)
  File ""/srv/www/virtualenvs/demo.example.org/lib/python2.6/site-packages/django/core/management/base.py"", line 232, in execute
    output = self.handle(*args, **options)
  File ""/srv/www/virtualenvs/demo.example.org/lib/python2.6/site-packages/django/core/management/base.py"", line 371, in handle
    return self.handle_noargs(**options)
  File ""/srv/www/virtualenvs/demo.example.org/lib/python2.6/site-packages/django/contrib/staticfiles/management/commands/collectstatic.py"", line 163, in handle_noargs
    collected = self.collect()
  File ""/srv/www/virtualenvs/demo.example.org/lib/python2.6/site-packages/django/contrib/staticfiles/management/commands/collectstatic.py"", line 113, in collect
    handler(path, prefixed_path, storage)
  File ""/srv/www/virtualenvs/demo.example.org/lib/python2.6/site-packages/django/contrib/staticfiles/management/commands/collectstatic.py"", line 275, in link_file
    os.symlink(source_path, full_path)
OSError: [Errno 17] File exists
}}}

I switched moduled here, hence the symlinks of the previous ""filebrowser"" were still there, but no longer pointed to an existing file.
The same also happens when one reorganized the project layout, while.

How to reproduce:

* Have a project with 1 app.
* run `./manage.py collectstatic --link`
* Rename that app, or move it to a sub package.
* run `./manage.py collectstatic --link` again.
"	Bug	closed	contrib.staticfiles	1.5	Normal	fixed		John Giannelos	Accepted	1	0	0	0	0	0