Add gdscript, closes #483

ftplugin/gdscript3.vim

@@ -0,0 +1,107 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'gdscript') == -1
+
+setlocal commentstring=#\ %s
+
+if exists("g:gdscript3_loaded")
+    finish
+endif
+let g:gdscript3_loaded=1
+
+if !has("python3") && !has("python")
+    finish
+endif
+
+if has("python3")
+    let s:pyfile_cmd = "py3file"
+    let s:py_cmd = "py3"
+else
+    let s:pyfile_cmd = "pyfile"
+    let s:py_cmd = "py"
+endif
+
+execute s:pyfile_cmd . " " . expand('<sfile>:p:h') . "/../python/init.py"
+
+fun! GDScriptComplete(findstart, base)
+    if a:findstart == 1
+        let line = getline('.')
+        let start = col('.') - 1
+        " Treat '-' as part of the word when completing in a string.
+        if synIDattr(synID(line('.'), col('.')-1, 1), 'name') ==# "gdString"
+            let pattern = '[-a-zA-Z0-9_]'
+        else
+            let pattern = '[a-zA-Z0-9_]'
+        endif
+        while start > 0 && line[start - 1] =~ pattern
+            let start -= 1
+        endwhile
+        return start
+    else
+        execute s:py_cmd . " gdscript_complete()"
+        if exists("gdscript_completions")
+            return gdscript_completions
+        else
+            return []
+        endif
+    endif
+endfun
+set omnifunc=GDScriptComplete
+
+" Configure for common completion frameworks.
+
+" Deoplete
+if &rtp =~ 'deoplete.nvim'
+    call deoplete#custom#option('sources', {
+        \ 'gdscript3': ['omni'],
+    \ })
+    call deoplete#custom#var('omni', 'input_patterns', {
+        \ 'gdscript3': [
+            \ '\.|\w+',
+            \ '\bextends\s+',
+            \ '\bexport\(',
+            \ '\bfunc\s+',
+            \ '"res://[^"]*'
+        \ ]
+    \ })
+endif
+
+" SuperTab
+let g:SuperTabDefaultCompletionType = "<c-x><c-o>"
+
+" YouCompleteMe
+if !exists('g:ycm_semantic_triggers')
+    let g:ycm_semantic_triggers = {}
+endif
+let g:ycm_semantic_triggers.gdscript3 = [
+    \'re!\w+',
+    \'.',
+    \'re!\bextends\s+',
+    \'re!\bexport\(',
+    \'re!\bfunc\s+',
+    \'re!"res://[^"]*'
+    \]
+
+
+
+" Configure echodoc
+if &rtp =~ 'echodoc'
+    let s:echodoc_dict = { "name": "gdscript3", "rank": 9 }
+    fun! s:echodoc_dict.search(text)
+        execute s:py_cmd . " echodoc_search()"
+        if exists("echodoc_search_result")
+            return echodoc_search_result
+        else
+            return []
+        endif
+    endfun
+    call echodoc#register('gdscript3', s:echodoc_dict)
+
+    " Reset echodoc cache when exiting insert mode.
+    " This fixes an issue where the function signature wouldn't re-appear
+    " after exiting and re-entering insert mode.
+    au InsertLeave * let b:prev_echodoc = []
+endif
+
+" Configure Syntastic checker
+let g:syntastic_gdscript3_checkers = ['godot_server']
+
+endif