[bitbake-devel] Filename too long

[Richard Purdie]

On Thu, 2017-01-19 at 14:13 +0800, Robert Yang wrote:
> Hi Mark,
> 
> We have a local patch to fix the problem, I had sent it to bitbake-
> devel
> before, but not merged:
> 
> https://patchwork.openembedded.org/patch/61321/
> 
> Here is the updated patch in our bitbake:
> 
> commit ebb1190c01a15fc6e91c9810c46313c3b3fb305c
> Author: Robert Yang <liezhi.yang at windriver.com>
> Date:   Fri Nov 8 23:32:11 2013 +0800
> 
>      fetch2/git.py: fix the filename too long error
> 
>      When we use the PREMIRROR/MIRROR from the local disk, and if it
> is in a
>      deep directory, for example, when len(path) > 255 (The
> NAME_MAX), we
>      will get the "filename too long error".
> 
>      This is becuase we use ud.path.replace('/', '.') to change the
> path to
>      the filename. We seldom see such a long url, but it is easy to
> produce
>      it on the local machine.
> 
>      Another problem is that:
> 
>      file:///local/path
> 
>      will be converted into .local.path which is a hidden file by
> default.

Looking at the code in your patch, this second piece clearly isn't true
due to this code:

          if gitsrcname.startswith('.'):
              gitsrcname = gitsrcname[1:]

I also don't believe this patch is correct since we're meant to be
creating a filename, not a path and if you leave the '/' characters in,
it isn't a filename. I think we likely just need to truncate the path
to the last say 225 chars if its over length. The unique piece should
be towards the right hand end of the name.

Cheers,

Richard