Improve alternate file config (#3493)

.SpaceVim.d/init.vim

@@ -27,8 +27,8 @@ function! s:language_specified_mappings() abort
         \ 'Vader',
         \ 'execute current file', 1)
 endfunction
-call SpaceVim#mapping#space#regesit_lang_mappings('vader', function('s:language_specified_mappings'))
 call SpaceVim#plugins#a#set_config_name(getcwd(), '.projections.json')
+call SpaceVim#mapping#space#regesit_lang_mappings('vader', function('s:language_specified_mappings'))
 command! -nargs=1 IssueEdit call SpaceVim#dev#issuemanager#edit(<f-args>)
 command! -nargs=1 PullCreate call SpaceVim#dev#pull#create(<f-args>)
 command! -nargs=1 PullMerge call SpaceVim#dev#pull#merge(<f-args>)

autoload/SpaceVim/plugins/a.vim

@@ -48,14 +48,11 @@ function! s:load_cache() abort
   endif
 endfunction
 
-
-
 " when this function is called, the project_config file name is changed, and
 " the project_config info is cleared.
 function! SpaceVim#plugins#a#set_config_name(path, name) abort
   let s:alternate_conf[a:path] = a:name
 endfunction
-
 function! s:get_project_config(conf_file) abort
   call s:LOGGER.info('read context from: '. a:conf_file)
   let context = join(readfile(a:conf_file), "\n")
@@ -77,9 +74,12 @@ endfunction
 
 function! SpaceVim#plugins#a#alt(request_parse,...) abort
   let type = get(a:000, 0, 'alternate')
-  let conf_file_path = SpaceVim#plugins#a#getConfigPath()
+  if !exists('b:alternate_file_config')
-  let file = s:FILE.unify_path(bufname('%'), ':.')
+    let conf_file_path = SpaceVim#plugins#a#getConfigPath()
-  let alt = SpaceVim#plugins#a#get_alt(file, conf_file_path, a:request_parse, type)
+    let file = s:FILE.unify_path(bufname('%'), ':.')
+    let alt = SpaceVim#plugins#a#get_alt(file, conf_file_path, a:request_parse, type)
+  else
+  endif
   if !empty(alt)
     exe 'e ' . alt
   else

docs/cn/documentation.md

@@ -1925,6 +1925,26 @@ Denite/Unite 是一个强大的信息筛选浏览器，这类似于 Emacs 中的
 }
 ```
 
+除了使用 `.project_alt.json` 文件以外，还可以在启动函数中设置 `b:alternate_file_config`，
+例如：
+
+```vim
+augroup myspacevim
+    autocmd!
+    autocmd BufNewFile,BufEnter *.c let b:alternate_file_config = {
+        \ "src/*.c" : {
+            \ "doc" : "docs/{}.md",
+            \ "alternate" : "include/{}.h",
+            \ }
+        \ }
+    autocmd BufNewFile,BufEnter *.h let b:alternate_file_config = {
+        \ "include/*.h" : {
+            \ "alternate" : "scr/{}.c",
+            \ }
+        \ }
+augroup END
+```
+
 ### 标签管理
 
 在浏览代码时，通常需要给指定位置添加标签，方便快速跳转，在 SpaceVim

docs/documentation.md

@@ -2039,6 +2039,26 @@ here is an example of `.project_alt.json`:
 }
 ```
 
+instead of using `.project_alt.json`, `b:alternate_file_config`
+can be used in bootstrap function, for example:
+
+```vim
+augroup myspacevim
+    autocmd!
+    autocmd BufNewFile,BufEnter *.c let b:alternate_file_config = {
+        \ "src/*.c" : {
+            \ "doc" : "docs/{}.md",
+            \ "alternate" : "include/{}.h",
+            \ }
+        \ }
+    autocmd BufNewFile,BufEnter *.h let b:alternate_file_config = {
+        \ "include/*.h" : {
+            \ "alternate" : "scr/{}.c",
+            \ }
+        \ }
+augroup END
+```
+
 ### Bookmarks management
 
 Bookmarks manager is included in `tools` layer, to use following key bindings, you need to enable

test/plugin/a.vader

@@ -1,6 +1,5 @@
 Execute ( SpaceVim plugin: a.vim ):
-  call SpaceVim#plugins#a#set_config_name(getcwd(), '.projections.json')
+  let root = SpaceVim#plugins#a#get_root()
-  let root = SpaceVim#plugins#a#getConfigPath()
   AssertEqual SpaceVim#plugins#a#get_alt('docs/index.md', root, 1), 'docs/cn/index.md'
   AssertEqual SpaceVim#plugins#a#get_alt('docs/cn/index.md', root, 1), 'docs/index.md'
   AssertEqual SpaceVim#plugins#a#get_alt('docs/api/job.md', root, 1), 'docs/cn/api/job.md'