Update GoGet. if cursor current line is a valid pkg url, will auto fill it to go get argument

README.md

@@ -194,10 +194,13 @@ first run of `GoFmt` may fail. It is recommended to run `GoInstallBinaries` to i
 | GoTest package_path -tags=yourtags            | go test packagepath -tags=yourtags                                       |
 | GoTest package_path -tags=yourtags other_args | go test packagepath -tags=yourtags other_args                            |
 | GoLint                                        | golangci-lint                                                            |
-| GoGet package_url                                       | go get package_url                                                           |
+| GoGet {package_url}                                       | go get package_url. Note1                                                  |
 | GoVet                                         | go vet                                                                   |
 | GoCoverage                                    | go test -coverprofile                                                    |
 
+Note1: if package_url not provided, will check current line is a valid package url or not, if it is valid, will
+fetch current url
+
 Show test coverage:
 
 <img width="479" alt="GoTestCoverage" src="https://user-images.githubusercontent.com/1681295/130821038-fa2545c6-16f6-4448-9a0c-91a1ab333750.png">

doc/go.txt

@@ -195,7 +195,8 @@ COMMANDS                                                     *go-nvim-commands*
 :GoVet                                                          *:GoVet*
         Run go vet
 :GoGet {package_url}                                            *:GoGet*
-        Run go get {package_url}
+        Run go get {package_url}, if package_url not provided, will parse
+        current line and use it as url if valid
 
 :GoLint                                                           *:GoLint*
         Run Golint
@@ -265,6 +266,10 @@ COMMANDS                                                     *go-nvim-commands*
 :GoDoc {options}                                                          *:GoDoc*
         e.g. GoDoc fmt.Println
 
+:GoImpl {options}                                                          *:GoImpl*
+        e.g. GoImpl {receiver} {interface}, will check if cursor is a valid
+        receiver, if you park cursor on struct name, receiver can be omitted.
+        e.g ":GoImpl io.Reader", or "GoImpl f *File io.Reader"
 ==============================================================================
 OPTIONS                                                       *go-nvim-options*
 

lua/go/goget.lua

@@ -7,8 +7,23 @@ function M.run(args)
     table.remove(args, i)
     table.insert(args, i, m)
   end
+
+  local row, col = unpack(vim.api.nvim_win_get_cursor(0))
+  row, col = row - 1, col
+
+  local line = vim.api.nvim_buf_get_lines(0, row, row + 1, true)[1]
   local cmd = { "go", "get" }
   vim.list_extend(cmd, args)
+  line = line:gsub("%s+", "")
+  line = line:gsub('"', "")
+  if string.find(line, "%a+%.%a+/%a+/%a+") then
+    -- the cursor is on line of package URL e.g. github.com/abc/pkg
+    table.insert(cmd, line)
+  else
+    if #args == 0 then
+      table.insert(cmd, "./...")
+    end
+  end
   runner.run(cmd)
 end