This allows people to incorporate the thoughtbot dotfiles into their own
dotfiles in a more fine-grained manner.
I left some things in zshrc that we should eventually handle more
precisely:
- Load `.zsh/functions/*`. This could instead be replaced with: `mv
.zsh/functions/* .zsh/configs`.
- Load `.aliases`. This could instead be replaced with: `mv .aliases
.zsh/configs/aliases.zsh`.
- Load `.zshrc.local`. This file can realistically go away entirely,
with people adding their own files to `.zsh/configs`.
A further refactoring, which I have done locally, is to introduce a
`~/.sh/configs` directory, in which people can put POSIX-specific
configuration that can be shared between GNU Bash, zsh, ksh, etc:
aliases, functions, paths, prompts, and so on. But one step at a time.
Other changes:
* Move aliases setup to occur after loading other config, as some of our
aliases depend on environment variables having been set, so alias
loading must come last after we've sourced `zsh/configs`.
* Move autocompletion for `g` function from the function definition to
to `zsh/completions/_g`
* Move `PATH` setup to `zsh/configs/post` to ensure it happens after
other configuration that might alter the `PATH`
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