feat: add IvyWorkspaceSymbol command

This is a command that will search the lsp workspace symbols on a search
term.

lua/ivy/backends/lsp-workspace-symbols.lua

@@ -0,0 +1,40 @@
+local window = require "ivy.window"
+local utils = require "ivy.utils"
+
+local previous_results = {}
+local function set_items(items)
+  window.set_items(items)
+  previous_results = items
+end
+
+local function items(input)
+  local buffer_number = window.origin_buffer
+  local cwd = vim.fn.getcwd()
+  local results = {}
+  vim.lsp.buf_request(buffer_number, "workspace/symbol", { query = input }, function(err, server_result, _, _)
+    if err ~= nil then
+      set_items { content = "-- There was an error with workspace/symbol --" }
+      return
+    end
+    local locations = vim.lsp.util.symbols_to_items(server_result or {}, buffer_number) or {}
+    for index = 1, #locations do
+      local item = locations[index]
+      local relative_path = item.filename:sub(#cwd + 2, -1)
+      table.insert(results, { content = relative_path .. ":" .. item.lnum .. ": " .. item.text })
+    end
+
+    set_items(results)
+  end)
+
+  return previous_results
+end
+
+local lsp_workspace_symbols = {
+  name = "WorkspaceSymbol",
+  command = "IvyWorkspaceSymbol",
+  description = "Search for workspace ymbol using the lsp workspace/symbol",
+  items = items,
+  callback = utils.vimgrep_action(),
+}
+
+return lsp_workspace_symbols

lua/ivy/window.lua

@@ -27,6 +27,7 @@ window.index = 0
 window.origin = nil
 window.window = nil
 window.buffer = nil
+window.origin_buffer = nil
 
 window.initialize = function()
   window.make_buffer()
@@ -34,6 +35,7 @@ end
 
 window.make_buffer = function()
   window.origin = vim.api.nvim_get_current_win()
+  window.origin_buffer = vim.api.nvim_win_get_buf(0)
 
   vim.api.nvim_command "botright split new"
   window.buffer = vim.api.nvim_win_get_buf(0)
@@ -138,6 +140,7 @@ window.destroy = function()
   window.buffer = nil
   window.window = nil
   window.origin = nil
+  window.origin_buffer = nil
   window.index = 0
 end
 

plugin/ivy.lua

@@ -29,5 +29,6 @@ register_backend(require "ivy.backends.ag")
 register_backend(require "ivy.backends.buffers")
 register_backend(require "ivy.backends.files")
 register_backend(require "ivy.backends.lines")
+register_backend(require "ivy.backends.lsp-workspace-symbols")
 
 vim.cmd "highlight IvyMatch cterm=bold gui=bold"