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diff --git a/docs/source/troubleshooting.rst b/docs/source/troubleshooting.rst new file mode 100644 index 0000000..30f5d4c --- /dev/null +++ b/docs/source/troubleshooting.rst @@ -0,0 +1,329 @@ +*************** +Troubleshooting +*************** + +System-specific issues +====================== + +.. toctree:: + + Linux <troubleshooting/linux> + OS X <troubleshooting/osx> + +Common issues +============= + +After an update something stopped working +----------------------------------------- + +Assuming powerline was working before update and stopped only after there are +two possible explanations: + +* You have more then one powerline installation (e.g. ``pip`` and ``Vundle`` + installations) and you have updated only one. +* Update brought some bug to powerline. + +In the second case you, of course, should report the bug to `powerline bug +tracker <https://github.com/powerline/powerline>`_. In the first you should +make sure you either have only one powerline installation or you update all of +them simultaneously (beware that in the second case you are not supported). To +diagnose this problem you may do the following: + +#) If this problem is observed within the shell make sure that + + .. code-block:: sh + + python -c 'import powerline; print (powerline.__file__)' + + which should report something like + :file:`/usr/lib64/python2.7/site-packages/powerline/__init__.pyc` (if + powerline is installed system-wide) or + :file:`/home/USER/.../powerline/__init__.pyc` (if powerline was cloned + somewhere, e.g. in :file:`/home/USER/.vim/bundle/powerline`) reports the same + location you use to source in your shell configuration: in first case it + should be some location in :file:`/usr` (e.g. + :file:`/usr/share/zsh/site-contrib/powerline.zsh`), in the second it should + be something like + :file:`/home/USER/.../powerline/bindings/zsh/powerline.zsh`. If this is true + it may be a powerline bug, but if locations do not match you should not + report the bug until you observe it on configuration where locations do + match. +#) If this problem is observed specifically within bash make sure that you clean + ``$POWERLINE_COMMAND`` and ``$PROMPT_COMMAND`` environment variables on + startup or, at least, that it was cleaned after update. While different + ``$POWERLINE_COMMAND`` variable should not cause any troubles most of time + (and when it will cause troubles are rather trivial) spoiled + ``$PROMPT_COMMAND`` may lead to strange error messages or absence of exit + code reporting. + + These are the sources which may keep outdated environment variables: + + * Any command launched from any application inherits its environment unless + callee explicitly requests to use specific environment. So if you did + ``exec bash`` after update it is rather unlikely to fix the problem. + * More interesting: `tmux` is a client-server application, it keeps one + server instance per one user. You probably already knew that, but there is + an interesting consequence: once `tmux` server was started it inherits its + environment from the callee and keeps it *forever* (i.e. until server is + killed). This environment is then inherited by applications you start with + ``tmux new-session``. Easiest solution is to kill tmux with ``tmux + kill-server``, but you may also use ``tmux set-environment -u`` to unset + offending variables. + * Also check `When using z powerline shows wrong number of jobs`_: though + this problem should not be seen after update only, it contains another + example of ``$PROMPT_COMMAND`` spoiling results. + +#) If this problem is observed within the vim instance you should check out the + output of the following Ex mode commands + + .. code-block:: vim + + python import powerline as pl ; print (pl.__file__) + python3 import powerline as pl ; print (pl.__file__) + + One (but not both) of them will most likely error out, this is OK. The same + rules apply as in the 1), but in place of sourcing you should seek for the + place where you modify `runtimepath` vim option. If you install powerline + using `VAM <https://github.com/MarcWeber/vim-addon-manager>`_ then no + explicit modifications of runtimpath were performed in your vimrc + (runtimepath is modified by VAM in this case), but powerline will be placed + in :file:`{plugin_root_dir}/powerline` where `{plugin_root_dir}` is stored in + VAM settings dictionary: do `echo g:vim_addon_manager.plugin_root_dir`. + +There is a hint if you want to place powerline repository somewhere, but still +make powerline package importable anywhere: use + + .. code-block:: sh + + pip install --user --editable path/to/powerline + +Tmux/screen-related issues +========================== + +I’m using tmux and Powerline looks like crap, what’s wrong? +----------------------------------------------------------- + +* You need to tell tmux that it has 256-color capabilities. Add this to your + :file:`.tmux.conf` to solve this issue:: + + set -g default-terminal "screen-256color" +* If you’re using iTerm2, make sure that you have enabled the setting + :guilabel:`Set locale variables automatically` in :menuselection:`Profiles --> + Terminal --> Environment`. +* Make sure tmux knows that terminal it is running in support 256 colors. You + may tell it tmux by using ``-2`` option when launching it. + +I’m using tmux/screen and Powerline is colorless +------------------------------------------------ + +* If the above advices do not help, then you need to disable + :ref:`term_truecolor <config-common-term_truecolor>`. +* Alternative: set :ref:`additional_escapes <config-common-additional_escapes>` + to ``"tmux"`` or ``"screen"``. Note that it is known to work perfectly in + screen, but in tmux it may produce ugly spaces. + + .. warning:: + Both tmux and screen are not resending sequences escaped in such a way. Thus + even though additional escaping will work for the last shown prompt, + highlighting will eventually go away when tmux or screen will redraw screen + for some reason. + + E.g. in screen it will go away when you used copy mode and prompt got out of + screen and in tmux it will go away immediately after you press ``<Enter>``. + +In tmux there is a green bar in place of powerline +-------------------------------------------------- + +In order for tmux bindings to work ``powerline-config`` script is required to be +present in ``$PATH``. Alternatively one may define ``$POWERLINE_CONFIG_COMMAND`` +environment variable pointing to the location of the script. *This variable must +be defined prior to launching tmux server and in the environment where server is +started from.* + +Shell issues +============ + +Pipe status segment displays only last value in bash +---------------------------------------------------- + +Make sure that powerline command that sets prompt appears the very first in +``$PROMPT_COMMAND``. To do this ``powerline.sh`` needs to be sourced the very +last, after all other users of ``$PROMPT_COMMAND``. + +Bash prompt stopped updating +---------------------------- + +Make sure that powerline commands appear in ``$PROMPT_COMMAND``: some users of +``$PROMPT_COMMAND`` have a habit of overwriting the value instead of +prepending/appending to it. All powerline commands start with ``_powerline`` or +``powerline``, e.g. ``_powerline_set_prompt``. + +Bash prompt does not show last exit code +---------------------------------------- + +There are two possibilities here: + +* You are using ``default`` theme in place of ``default_leftonly``. Unlike + ``default_leftonly`` ``default`` theme was designed for shells with right + prompt support (e.g. zsh, tcsh, fish) and status in question is supposed to be + shown on the right side which bash cannot display. + +* There is some other user of ``$PROMPT_COMMAND`` which prepended to this + variable, but did not bother keeping the exit code. For the best experience + powerline must appear first in ``$PROMPT_COMMAND`` which may be achieved by + sourcing powerline bindings the last. + + .. note:: + Resourcing bash bindings will not resolve the problem unless you clear + powerline commands from ``$PROMPT_COMMAND`` first. + +When sourcing shell bindings it complains about missing command or file +----------------------------------------------------------------------- + +If you are using ``pip`` based installation do not forget to add pip-specific +executable path to ``$PATH`` environment variable. This path usually looks +something like ``$HOME/.local/bin`` (linux) or +``$HOME/Library/Python/{python_version}/bin`` (OS X). One may check out where +``powerline-config`` script was installed by using ``pip show -f +powerline-status | grep powerline-config`` (does not always work). + +I am suffering bad lags before displaying shell prompt +------------------------------------------------------ + +To get rid of these lags there currently are two options: + +* Run ``powerline-daemon``. Powerline does not automatically start it for you. +* Compile and install ``libzpython`` module that lives in + https://bitbucket.org/ZyX_I/zpython. This variant is zsh-specific. + +Prompt is spoiled after completing files in ksh +----------------------------------------------- + +This is exactly why powerline has official mksh support, but not official ksh +support. If you know the solution feel free to share it in `powerline bug +tracker`_. + +When using z powerline shows wrong number of jobs +------------------------------------------------- + +This happens because `z <https://github.com/rupa/z>`_ is launching some jobs in +the background from ``$POWERLINE_COMMAND`` and these jobs fail to finish before +powerline prompt is run. + +Solution to this problem is simple: be sure that :file:`z.sh` is sourced +strictly after :file:`powerline/bindings/bash/powerline.sh`. This way background +jobs are spawned by `z <https://github.com/rupa/z>`_ after powerline has done +its job. + +When using shell I do not see powerline fancy characters +-------------------------------------------------------- + +If your locale encoding is not unicode (any encoding that starts with “utf” or +“ucs” will work, case is ignored) powerline falls back to ascii-only theme. You +should set up your system to use unicode locale or forget about powerline fancy +characters. + +Urxvt unicode3 and frills +------------------------- + +Make sure that, whatever urxvt package you're installing, both the `unicode3` +and `frills` features are enabled at compile time. Run +``urxvt --help 2>&1 | grep options:`` to get a list of enabled options. +This should contain at least `frills`, `unicode3` and optionally `iso14755` +if you want to input Unicode characters as well. + +Compiler flags example: + + --enable-frills \ + --enable-unicode3 + +As long as your terminal emulator is compiled without unicode rendering, +no amount of configuration will make it display unicode characters. +They're being considered 'unnecessary features', but they add negligible +overhead to the size of the installed package (~100KB). + +Vim issues +========== + +My vim statusline has strange characters like ``^B`` in it! +----------------------------------------------------------- + +* Please add ``set encoding=utf-8`` to your :file:`vimrc`. + +My vim statusline has a lot of ``^`` or underline characters in it! +------------------------------------------------------------------- + +* You need to configure the ``fillchars`` setting to disable statusline + fillchars (see ``:h 'fillchars'`` for details). Add this to your :file:`vimrc` + to solve this issue: + + .. code-block:: vim + + set fillchars+=stl:\ ,stlnc:\ + +My vim statusline is hidden/only appears in split windows! +---------------------------------------------------------- + +* Make sure that you have ``set laststatus=2`` in your :file:`vimrc`. + +My vim statusline is not displayed completely and has too much spaces +--------------------------------------------------------------------- + +* Be sure you have ``ambiwidth`` option set to ``single``. +* Alternative: set :ref:`ambiwidth <config-common-ambiwidth>` to 2, remove fancy + dividers (they suck when ``ambiwidth`` is set to double). + +Powerline loses color after editing vimrc +----------------------------------------- + +If your vimrc has something like + +.. code-block:: vim + + autocmd! BufWritePost ~/.vimrc :source ~/.vimrc + +used to automatically source vimrc after saving it then you must add ``nested`` +after pattern (``vimrc`` in this case): + +.. code-block:: vim + + autocmd! BufWritePost ~/.vimrc nested :source ~/.vimrc + +. Alternatively move ``:colorscheme`` command out of the vimrc to the file which +will not be automatically resourced. + +Observed problem is that when you use ``:colorscheme`` command existing +highlighting groups are usually cleared, including those defined by powerline. +To workaround this issue powerline hooks ``Colorscheme`` event, but when you +source vimrc with ``BufWritePost`` (or any other) event, but without ``nested`` +this event is not launched. See also `autocmd-nested +<http://vimcommunity.bitbucket.org/doc/autocmd.txt.html#autocmd-nested>`_ Vim +documentation. + +Powerline loses color after saving any file +------------------------------------------- + +It may be one of the incarnations of the above issue: specifically minibufexpl +is known to trigger it. If you are using minibufexplorer you should set + +.. code-block:: vim + + let g:miniBufExplForceSyntaxEnable = 1 + +variable so that this issue is not triggered. Complete explanation: + +#. When MBE autocommand is executed it launches ``:syntax enable`` Vim command… +#. … which makes Vim source :file:`syntax/syntax.vim` file … +#. … which in turn sources :file:`syntax/synload.vim` … +#. … which executes ``:colorscheme`` command. Normally this command triggers + ``Colorscheme`` event, but in the first point minibufexplorer did set up + autocommands that miss ``nested`` attribute meaning that no events will be + triggered when processing MBE events. + +.. note:: + This setting was introduced in version 6.3.1 of `minibufexpl + <http://www.vim.org/scripts/script.php?script_id=159>`_ and removed in + version 6.5.0 of its successor `minibufexplorer + <http://www.vim.org/scripts/script.php?script_id=3239>`_. It is highly + advised to use the latter because `minibufexpl`_ was last updated late in + 2004. |