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elixir-ls now recognizes umbrella projects

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Previously, elixir-ls would treat each sub-project within an umbrella as
standalone, which isn't desirable from a language server perspective.

Added ale#handlers#elixir#FindMixUmbrellaRoot, which locates the current
project's root and then continues searching upwards for a potential
umbrella project root. This literally looks just two levels up to keep
things simple while keeping in line with Elixir project conventions.

Use this new function to determine elixir-ls's LSP project root.
This commit is contained in:
Jon Parise
2018-11-01 13:35:18 -07:00
parent acdc99b94d
commit b25794e81b
9 changed files with 32 additions and 10 deletions
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21
autoload/ale/handlers/elixir.vim
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@@ -1,13 +1,28 @@
" Author: Matteo Centenaro (bugant) - https://github.com/bugant
"
" Description: find the root directory for an elixir project that uses mix
" Author: Jon Parise <jon@indelible.org>
" Description: Functions for working with Elixir projects
" Find the root directory for an elixir project that uses mix.
function! ale#handlers#elixir#FindMixProjectRoot(buffer) abort
let l:mix_file = ale#path#FindNearestFile(a:buffer, 'mix.exs')
if !empty(l:mix_file)
return fnamemodify(l:mix_file, ':p:h')
return fnamemodify(l:mix_file, ':p:h')
endif
return '.'
endfunction
" Similar to ale#handlers#elixir#FindMixProjectRoot but also continue the
" search upward for a potential umbrella project root. If an umbrella root
" does not exist, the initial project root will be returned.
function! ale#handlers#elixir#FindMixUmbrellaRoot(buffer) abort
let l:app_root = ale#handlers#elixir#FindMixProjectRoot(a:buffer)
let l:umbrella_root = fnamemodify(l:app_root, ':h:h')
if filereadable(l:umbrella_root . '/mix.exs')
return l:umbrella_root
endif
return l:app_root
endfunction