Add default plugins, and install go plugin by default

cmd/micro/bindings.go

@@ -2,10 +2,8 @@ package main
 
 import (
 	"encoding/json"
-	"errors"
 	"io/ioutil"
 	"os"
-	"os/exec"
 	"strconv"
 	"strings"
 	"time"
@@ -615,10 +613,6 @@ func (v *View) Save() bool {
 		messenger.Error(err.Error())
 	} else {
 		messenger.Message("Saved " + v.Buf.Path)
-		switch v.Buf.Filetype {
-		case "Go":
-			v.GoSave()
-		}
 	}
 	for _, pl := range loadedPlugins {
 		if err := L.CallByParam(lua.P{
@@ -633,33 +627,6 @@ func (v *View) Save() bool {
 	return true
 }
 
-// GoSave saves the current file (must be a go file) and runs goimports or gofmt
-// depending on the user's configuration
-func (v *View) GoSave() {
-	if settings["goimports"] == true {
-		messenger.Message("Running goimports...")
-		err := goimports(v.Buf.Path)
-		if err != nil {
-			messenger.Error(err)
-		} else {
-			messenger.Message("Saved " + v.Buf.Path)
-		}
-		v.ReOpen()
-	} else if settings["gofmt"] == true {
-		messenger.Message("Running gofmt...")
-		err := gofmt(v.Buf.Path)
-		if err != nil {
-			messenger.Error(err)
-		} else {
-			messenger.Message("Saved " + v.Buf.Path)
-		}
-		v.ReOpen()
-		return
-	}
-
-	return
-}
-
 // Find opens a prompt and searches forward for the input
 func (v *View) Find() bool {
 	if v.Cursor.HasSelection() {
@@ -889,25 +856,3 @@ func (v *View) JumpLine() bool {
 func None() bool {
 	return false
 }
-
-// gofmt runs gofmt on a file
-func gofmt(file string) error {
-	cmd := exec.Command("gofmt", "-w", file)
-	cmd.Start()
-	err := cmd.Wait()
-	if err != nil {
-		return errors.New("Check syntax ") //TODO: highlight or display locations
-	}
-	return nil
-}
-
-// goimports runs goimports on a file
-func goimports(file string) error {
-	cmd := exec.Command("goimports", "-w", file)
-	cmd.Start()
-	err := cmd.Wait()
-	if err != nil {
-		return errors.New("Check syntax ") //TODO: highlight or display locations
-	}
-	return nil
-}

cmd/micro/plugin.go

@@ -6,6 +6,11 @@ import (
 
 var loadedPlugins []string
 
+var preInstalledPlugins = []string{
+	"go",
+}
+
+// LoadPlugins loads the pre-installed plugins and the plugins located in ~/.config/micro/plugins
 func LoadPlugins() {
 	files, _ := ioutil.ReadDir(configDir + "/plugins")
 	for _, plugin := range files {
@@ -23,4 +28,18 @@ func LoadPlugins() {
 			}
 		}
 	}
+
+	for _, pluginName := range preInstalledPlugins {
+		plugin := "runtime/plugins/" + pluginName + "/" + pluginName + ".lua"
+		data, err := Asset(plugin)
+		if err != nil {
+			TermMessage("Error loading pre-installed plugin: " + pluginName)
+			continue
+		}
+		if err := L.DoString(string(data)); err != nil {
+			TermMessage(err)
+			continue
+		}
+		loadedPlugins = append(loadedPlugins, pluginName)
+	}
 }

cmd/micro/view.go

@@ -372,6 +372,7 @@ func (v *View) HandleEvent(event tcell.Event) {
 
 // GutterMessage creates a message in this view's gutter
 func (v *View) GutterMessage(lineN int, msg string, kind int) {
+	lineN--
 	gutterMsg := GutterMessage{
 		lineNum: lineN,
 		msg:     msg,

runtime/plugins/go/go.lua

@@ -0,0 +1,49 @@
+function go_onSave()
+    if view.Buf.Filetype == "Go" then
+        if settings.GoImports then
+            go_goimports()
+        elseif settings.GoFmt then
+            go_gofmt()
+        end
+        go_golint()
+    end
+end
+
+function go_gofmt()
+    local handle = io.popen("gofmt -w " .. view.Buf.Path)
+    local result = handle:read("*a")
+    handle:close()
+    
+    view:ReOpen()
+end
+
+function go_golint()
+    local handle = io.popen("golint " .. view.Buf.Path)
+    local result = go_split(handle:read("*a"), ":")
+    handle:close()
+
+    local file = result[1]
+    local line = tonumber(result[2])
+    local col = tonumber(result[3])
+    local msg = result[4]
+
+    view:ReOpen()
+    view:GutterMessage(line, msg, 2)
+end
+
+function go_goimports()
+    local handle = io.popen("goimports -w " .. view.Buf.Path)
+    local result = go_split(handle:read("*a"), ":")
+    handle:close()
+
+    view:ReOpen()
+end
+
+function go_split(str, sep)
+   local result = {}
+   local regex = ("([^%s]+)"):format(sep)
+   for each in str:gmatch(regex) do
+      table.insert(result, each)
+   end
+   return result
+end