Sometimes it's needed to override parts of `vim_configurable`, for
instance when using ENSIME (http://ensime.github.io/), in this case you
need a Python interpreter and the modules `sexpdata` and
`websocket_client`.
However overriding `vim_configurable` is quite hard as we run
`vimUtils.makeCustomizable` over the default comming from
`configurable.nix`. Therefore it's necessary to copy the code from
`all-packages.nix` and alter the parts you need: https://nixos.org/nix-dev/2017-April/023364.html
In order to simplify overriding `vim_configurable` I added an
`override` and an `overrideAttrs` function to `vimutils.makeCustomizable`
to ensure that the customization capabilities won't be lost after
altering the derivation.
Now it's possible to write expressions like this without evaluation
failures:
```
with pkgs;
let
vimPy3 = vim_configurable.override {
python = python3;
};
in vimPy3.customize { ... }
```
* vim_configurable: Add packages option to vimrcConfig
Version 8 of vim adds the concept of "vim packages": directories which
contain one or more vim plugins, in either "start" or "opt"
subdirectories. Those in "start" are to be loaded automatically, while
those in "opt" can be loaded manually. Vim detects any packages located
in one of its "packpaths".
The packages option takes a set of sets describing one or more vim
packages, and adds the derivation containing these packages to the
packpath.
* fix documentation.
Now referring to the nix prefetch scripts through their nixpkgs
derivation in order to make sure their shebang lines are rewritten
properly. Otherwise nix-prefetch-hg fails on Ubuntu (and probably
Debian) systems, where /bin/sh is not bash.
- sort automatcially generated vim derivations
- move the plugins to be derived by VAM into its own file: vim-plugin-names
- rename vimrc into vimUtils moving all common code into it
so that it is possible to use it within ~/.nixpkgs/config.nix
- Moving all important documentation into vimUtils
- provide vimPlugins.pluginnames2Nix to provide a bin/vim-* command
writing updated derivations into its buffer
VAM's repository's nix.vim got some improvements @ VAM repository, eg hg
fetchout out got fixed and shell failures are noticed now (Thanks to Arseniy
Seroka)
