Hi,
Right; matplotlib expects matplotlibrc to be installed. Looking at
matplotlib/__init__.py,
you can see rc_params() calls matplotlib_fname() to get the default config
filename.
The search order there is:
- `$PWD/matplotlibrc`
- `$MATPLOTLIBRC/matplotlibrc`
- `$MPLCONFIGDIR/matplotlibrc`
- `$HOME/.matplotlib/matplotlibrc`, if it exists
- or `$XDG_CONFIG_HOME/matplotlib/matplotlibrc` (if
$XDG_CONFIG_HOME is defined)
- or `$HOME/.config/matplotlib/matplotlibrc` (if
$XDG_CONFIG_HOME is not defined)
- `$HOME/.matplotlib/matplotlibrc` if `$HOME` is defined.
- Lastly, it looks in `$MATPLOTLIBDATA/matplotlibrc` for a
system-defined copy.
So just create a matplotlibrc in your $SNAP and you should be good
Cheers,
- Loïc
On Sun, Oct 2, 2016 at 9:54 AM, Robert Park <robert.p...@canonical.com>
wrote:
> Hi all!
>
> Back again with a second attempt, this time I'm not trying to modify
> the host system so I'm hoping this should be a lot easier/possible!
>
> Here's my snapcraft.yaml:
>
> https://git.launchpad.net/~robru/+git/weightloss/tree/snapcraft.yaml
>
> Pretty simple little flask webapp, just does some data manipulations
> and then serves graphics over HTTP.
>
> Snap builds ok but when I run it I get this:
>
> weighttracker
> Traceback (most recent call last):
> File "/snap/weighttracker/x2/run.py", line 15, in <module>
> from graph import draw
> File "/snap/weighttracker/x2/graph.py", line 14, in <module>
> from matplotlib.dates import DateFormatter
> File "/snap/weighttracker/x2/usr/lib/python3/dist-packages/
> matplotlib/__init__.py",
> line 1133, in <module>
> rcParams = rc_params()
> File "/snap/weighttracker/x2/usr/lib/python3/dist-packages/
> matplotlib/__init__.py",
> line 977, in rc_params
> return rc_params_from_file(fname, fail_on_error)
> File "/snap/weighttracker/x2/usr/lib/python3/dist-packages/
> matplotlib/__init__.py",
> line 1102, in rc_params_from_file
> config_from_file = _rc_params_in_file(fname, fail_on_error)
> File "/snap/weighttracker/x2/usr/lib/python3/dist-packages/
> matplotlib/__init__.py",
> line 1020, in _rc_params_in_file
> with _open_file_or_url(fname) as fd:
> File "/snap/weighttracker/x2/usr/lib/python3.5/contextlib.py", line
> 59, in __enter__
> return next(self.gen)
> File "/snap/weighttracker/x2/usr/lib/python3/dist-packages/
> matplotlib/__init__.py",
> line 1005, in _open_file_or_url
> with io.open(fname, encoding=encoding) as f:
> PermissionError: [Errno 13] Permission denied: '/etc/matplotlibrc'
>
>
> Not really sure what's going on, but it looks like matplotlib is
> hard-coding "/etc":
>
> $ cat /snap/weighttracker/x2/usr/lib/python3/dist-packages/
> matplotlib/__init__.py
> | grep /etc
> path = '/etc' # guaranteed to exist or raise
>
>
> Do I have to patch matplotlib here or is there some way snapcraft can
> fix this for me?
>
> (frustratingly the matplotlib code seems to harmlessly ignore the file
> if it doesn't exist, but they didn't anticipate the idea that they
> wouldn't have permission, so the code just barfs)
>
>
>
> Thanks.
>
> --
> robru
>
> --
> Snapcraft mailing list
> Snapcraft@lists.snapcraft.io
> Modify settings or unsubscribe at: https://lists.ubuntu.com/
> mailman/listinfo/snapcraft
>
--
- Loïc
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