Add 'autosave' option

Closes #278

cmd/micro/micro.go

@@ -8,6 +8,7 @@ import (
 	"path/filepath"
 	"runtime"
 	"strings"
+	"time"
 
 	"github.com/go-errors/errors"
 	"github.com/layeh/gopher-luar"
@@ -24,6 +25,7 @@ const (
 	synLinesDown         = 75  // How many lines down to look to do syntax highlighting
 	doubleClickThreshold = 400 // How many milliseconds to wait before a second click is not a double click
 	undoThreshold        = 500 // If two events are less than n milliseconds apart, undo both of them
+	autosaveTime         = 8   // Number of seconds to wait before autosaving
 )
 
 var (
@@ -61,7 +63,8 @@ var (
 	// Channel of jobs running in the background
 	jobs chan JobFunction
 	// Event channel
-	events chan tcell.Event
+	events   chan tcell.Event
+	autosave chan bool
 )
 
 // LoadInput determines which files should be loaded into buffers
@@ -330,6 +333,7 @@ func main() {
 
 	jobs = make(chan JobFunction, 100)
 	events = make(chan tcell.Event, 100)
+	autosave = make(chan bool)
 
 	LoadPlugins()
 
@@ -360,6 +364,15 @@ func main() {
 		}
 	}()
 
+	go func() {
+		for {
+			time.Sleep(autosaveTime * time.Second)
+			if globalSettings["autosave"].(bool) {
+				autosave <- true
+			}
+		}
+	}()
+
 	for {
 		// Display everything
 		RedrawAll()
@@ -372,6 +385,8 @@ func main() {
 			// If a new job has finished while running in the background we should execute the callback
 			f.function(f.output, f.args...)
 			continue
+		case <-autosave:
+			CurView().Save(true)
 		case event = <-events:
 		}
 

cmd/micro/settings.go

@@ -176,6 +176,7 @@ func GetOption(name string) interface{} {
 func DefaultGlobalSettings() map[string]interface{} {
 	return map[string]interface{}{
 		"autoindent":   true,
+		"autosave":     false,
 		"colorcolumn":  float64(0),
 		"colorscheme":  "zenburn",
 		"cursorline":   true,
@@ -199,6 +200,7 @@ func DefaultGlobalSettings() map[string]interface{} {
 func DefaultLocalSettings() map[string]interface{} {
 	return map[string]interface{}{
 		"autoindent":   true,
+		"autosave":     false,
 		"colorcolumn":  float64(0),
 		"cursorline":   true,
 		"filetype":     "Unknown",

cmd/micro/view.go

@@ -194,7 +194,13 @@ func (v *View) ScrollDown(n int) {
 // causing them to lose the unsaved changes
 func (v *View) CanClose() bool {
 	if v.Type == vtDefault && v.Buf.IsModified {
-		char, canceled := messenger.LetterPrompt("Save changes to "+v.Buf.Name+" before closing? (y,n,esc) ", 'y', 'n')
+		var char rune
+		var canceled bool
+		if v.Buf.Settings["autosave"].(bool) {
+			char = 'y'
+		} else {
+			char, canceled = messenger.LetterPrompt("Save changes to "+v.Buf.Name+" before closing? (y,n,esc) ", 'y', 'n')
+		}
 		if !canceled {
 			if char == 'y' {
 				v.Save(true)

runtime/help/options.md

@@ -93,6 +93,13 @@ Here are the options that you can set:
 
 	default value: `2`
 
+* `autosave`: micro will save the buffer every 8 seconds automatically.
+  Micro also will automatically save and quit when you exit without asking.
+  Be careful when using this feature, because you might accidentally save a file,
+  overwriting what was there before.
+
+	default value: `off`
+
 ---
 
 Default plugin options: