Enable "gf" for jumping to a module

Author: Patrick Oscity

ftplugin/elixir.vim

@@ -18,3 +18,39 @@ endif
 
 setlocal comments=:#
 setlocal commentstring=#\ %s
+
+function! GetElixirFilename(word)
+ let word = a:word
+
+ " get first thing that starts uppercase, until the first space or end of line
+ let word = substitute(word,'^\s*\(\u[^ ]\+\).*$','\1','g')
+
+ " remove any trailing characters that don't look like a nested module
+ let word = substitute(word,'\.\U.*$','','g')
+
+ " replace module dots with slash
+ let word = substitute(word,'\.','/','g')
+
+ " remove any special chars
+ let word = substitute(word,'[^A-z0-9-_/]','','g')
+
+ " convert to snake_case
+ let word = substitute(word,'\(\u\+\)\(\u\l\)','\1_\2','g')
+ let word = substitute(word,'\(\u\+\)\(\u\l\)','\1_\2','g')
+ let word = substitute(word,'\(\l\|\d\)\(\u\)','\1_\2','g')
+ let word = substitute(word,'-','_','g')
+ let word = tolower(word)
+
+ return word
+endfunction
+
+let &l:path =
+ \ join([
+ \  getcwd().'/lib',
+ \  getcwd().'/src',
+ \  getcwd().'/deps/**/lib',
+ \  getcwd().'/deps/**/src',
+ \  &g:path
+ \ ], ',')
+setlocal includeexpr=GetElixirFilename(v:fname)
+setlocal suffixesadd=.ex,.exs,.eex,.erl,.yrl,.hrl