ALEFileRename command added. (#4012)

* ALEFileRename command added.

This command renames file and uses tsserver `getEditsForFileRename` to
fix import paths in Typescript files.

* ale#util#Input fix

* Even more fixes.

* Linting error fix.

autoload/ale/filerename.vim

@@ -0,0 +1,133 @@
+" Author: Dalius Dobravolskas <dalius.dobravolskas@gmail.com>
+" Description: Rename file support for tsserver
+
+let s:filerename_map = {}
+
+" Used to get the rename map in tests.
+function! ale#filerename#GetMap() abort
+    return deepcopy(s:filerename_map)
+endfunction
+
+" Used to set the rename map in tests.
+function! ale#filerename#SetMap(map) abort
+    let s:filerename_map = a:map
+endfunction
+
+function! ale#filerename#ClearLSPData() abort
+    let s:filerename_map = {}
+endfunction
+
+function! s:message(message) abort
+    call ale#util#Execute('echom ' . string(a:message))
+endfunction
+
+function! ale#filerename#HandleTSServerResponse(conn_id, response) abort
+    if get(a:response, 'command', '') isnot# 'getEditsForFileRename'
+        return
+    endif
+
+    if !has_key(s:filerename_map, a:response.request_seq)
+        return
+    endif
+
+    let l:options = remove(s:filerename_map, a:response.request_seq)
+
+    let l:old_name = l:options.old_name
+    let l:new_name = l:options.new_name
+
+    if get(a:response, 'success', v:false) is v:false
+        let l:message = get(a:response, 'message', 'unknown')
+        call s:message('Error renaming file "' . l:old_name . '" to "' . l:new_name
+        \ . '". Reason: ' . l:message)
+
+        return
+    endif
+
+    let l:changes = a:response.body
+
+    if empty(l:changes)
+        call s:message('No changes while renaming "' . l:old_name . '" to "' . l:new_name . '"')
+    else
+        call ale#code_action#HandleCodeAction(
+        \   {
+        \       'description': 'filerename',
+        \       'changes': l:changes,
+        \   },
+        \   {
+        \       'should_save': 1,
+        \   },
+        \)
+    endif
+
+    silent! noautocmd execute 'saveas ' . l:new_name
+    call delete(l:old_name)
+endfunction
+
+function! s:OnReady(options, linter, lsp_details) abort
+    let l:id = a:lsp_details.connection_id
+
+    if !ale#lsp#HasCapability(l:id, 'filerename')
+        return
+    endif
+
+    let l:buffer = a:lsp_details.buffer
+
+    let l:Callback = function('ale#filerename#HandleTSServerResponse')
+
+    call ale#lsp#RegisterCallback(l:id, l:Callback)
+
+    let l:message = ale#lsp#tsserver_message#GetEditsForFileRename(
+    \   a:options.old_name,
+    \   a:options.new_name,
+    \)
+
+    let l:request_id = ale#lsp#Send(l:id, l:message)
+
+    let s:filerename_map[l:request_id] = a:options
+endfunction
+
+function! s:ExecuteFileRename(linter, options) abort
+    let l:buffer = bufnr('')
+
+    let l:Callback = function('s:OnReady', [a:options])
+    call ale#lsp_linter#StartLSP(l:buffer, a:linter, l:Callback)
+endfunction
+
+function! ale#filerename#Execute() abort
+    let l:lsp_linters = []
+
+    for l:linter in ale#linter#Get(&filetype)
+        if l:linter.lsp is# 'tsserver'
+            call add(l:lsp_linters, l:linter)
+        endif
+    endfor
+
+    if empty(l:lsp_linters)
+        call s:message('No active tsserver LSPs')
+
+        return
+    endif
+
+    let l:buffer = bufnr('')
+    let l:old_name = expand('#' . l:buffer . ':p')
+    let l:new_name = ale#util#Input('New file name: ', l:old_name, 'file')
+
+    if l:old_name is# l:new_name
+        call s:message('New file name matches old file name')
+
+        return
+    endif
+
+    if empty(l:new_name)
+        call s:message('New name cannot be empty!')
+
+        return
+    endif
+
+    for l:lsp_linter in l:lsp_linters
+        call s:ExecuteFileRename(l:lsp_linter, {
+        \   'old_name': l:old_name,
+        \   'new_name': l:new_name,
+        \})
+    endfor
+endfunction

autoload/ale/lsp.vim

@@ -38,6 +38,7 @@ function! ale#lsp#Register(executable_or_address, project, init_options) abort
         \   'capabilities': {
         \       'hover': 0,
         \       'rename': 0,
+        \       'filerename': 0,
         \       'references': 0,
         \       'completion': 0,
         \       'completion_trigger_characters': [],
@@ -380,6 +381,7 @@ function! ale#lsp#MarkConnectionAsTsserver(conn_id) abort
     let l:conn.capabilities.typeDefinition = 1
     let l:conn.capabilities.symbol_search = 1
     let l:conn.capabilities.rename = 1
+    let l:conn.capabilities.filerename = 1
     let l:conn.capabilities.code_actions = 1
 endfunction
 

autoload/ale/lsp/tsserver_message.vim

@@ -101,6 +101,14 @@ function! ale#lsp#tsserver_message#Rename(
     \}]
 endfunction
 
+function! ale#lsp#tsserver_message#GetEditsForFileRename(
+\ oldFilePath, newFilePath) abort
+    return [0, 'ts@getEditsForFileRename', {
+    \   'oldFilePath': a:oldFilePath,
+    \   'newFilePath': a:newFilePath,
+    \}]
+endfunction
+
 function! ale#lsp#tsserver_message#OrganizeImports(buffer) abort
     return [0, 'ts@organizeImports', {
     \   'scope': {

autoload/ale/util.vim

@@ -491,8 +491,12 @@ function! ale#util#FindItemAtCursor(buffer) abort
     return [l:info, l:loc]
 endfunction
 
-function! ale#util#Input(message, value) abort
-    return input(a:message, a:value)
+function! ale#util#Input(message, value, ...) abort
+    if a:0 > 0
+        return input(a:message, a:value, a:1)
+    else
+        return input(a:message, a:value)
+    endif
 endfunction
 
 function! ale#util#HasBuflineApi() abort