Used python version is controlled by `g:powerline_pycmd`. User configuration now
has top priority: if `g:powerline_pyeval` is set powerline will not try to use
`pyeval()` emulation in old Vim versions.
Closes#937 as WONTFIX
tmux configuration has become very fragmented between versions due to a
combination of new features and deprecation of older options. As such,
version checking for tmux became a requirement to allow maximum
functionality along with version-appropriate configuration. However,
wrapping nearly every line with `if-shell` is tedious and becomes
virtually unreadable.
This enhancement to tmux version-checking creates a logical
configuration file structure that reflects the development of tmux. As
additional configurations are added and tmux development continues, this
structure can be leveraged appropriately and extended as needed.
Rather than having multiple `if-shell` checks for the same version, each
version or version group with specific requirements can be checked only
once. This leads to simpler and fewer `if-shell` version checks. It also
reduces the ambiguity introduced by complex `if-shell` commands that
include an 'else' conditional.
A caveat to adding this enhancement is the additional requirement of the
end user to add a tmux variable definition (`POWERLINE_BINDINGS_DIR`) to
his/her `~/.tmux.conf` file. For existing tmux users leveraging
powerline, this may prove to be a slight one-time nuisance immediately
after upgrading. Without this definition, there is no way to determine
the location of the additional tmux powerline config files that have
been added with this enhancement. The docs have also been updated in
this commit to reflect this initial configuration requirement change.
Also added are some additional troubleshooting notes that point to
definition of this variable as a potential issue. Powerline will
continue to work without the definition of `POWERLINE_BINDINGS_DIR`, but
some of the functionality will be reduced and the appearance incomplete
(i.e. colors).
Ultimately, the caveat above is a small price to pay in exchange for a
framework that can be leveraged for proper version-appropriate
configuration of tmux going forward.
If the g:powerline_no_python_error variable is set don't issue an error
message even if vim doesn't have the required Python support. This
allows a common set of configuration files to be used across systems
where some of the copies of vim don't meet the requirements.
This extends priorities in both directions, uses slightly faster `is None`
check, makes it consistent with `interval` special-casing also to `None` and
makes lint able to use one simple `.type()` check in place of `.either()` one.
Kim Silkebækken
ZyX
ZyX
Austin Beam
Josh Turmel
S0lll0s
Ryan Collins
Tore Sinding Bekkedal
Aaron Schrab
mwcz