Set Project syntax with an environment variable

[akhan4u]

Hi,

I was wondering if you add the functionality to set the project related syntax with environment variable.

[syntax]
ruby=rails

export VIM_INVESTIGATE_SYNTAX_KEY=ruby
export VIM_INVESTIGATE_SYNTAX_VALUE=rails

This helps immensely in projects that are managed with .direnv. Or else we need to place a .invrc file in every folder beneath the root directory of the project. If vim is running inside those directories, it does not pick up .invrc settings.

Investigate provides tons of configurations to allow all language defaults to
be overridden on a global and per-project basis. This can be done by setting
global vim variables or using a '.investigaterc' file in the root of the
directory vim is running from.