Add support for making buffer local options in settings.json

cmd/micro/buffer.go

@@ -93,6 +93,8 @@ func NewBuffer(txt []byte, path string) *Buffer {
 		buf: b,
 	}
 
+	InitLocalSettings(b)
+
 	if b.Settings["savecursor"].(bool) || b.Settings["saveundo"].(bool) {
 		// If either savecursor or saveundo is turned on, we need to load the serialized information
 		// from ~/.config/micro/buffers

cmd/micro/micro.go

@@ -210,7 +210,7 @@ func main() {
 	InitConfigDir()
 
 	// Load the user's settings
-	InitSettings()
+	InitGlobalSettings()
 	InitCommands()
 	InitBindings()
 

cmd/micro/settings.go

@@ -7,13 +7,16 @@ import (
 	"os"
 	"reflect"
 	"strconv"
+	"strings"
+
+	"github.com/zyedidia/glob"
 )
 
 // The options that the user can set
 var globalSettings map[string]interface{}
 
-// InitSettings initializes the options map and sets all options to their default values
-func InitSettings() {
+// InitGlobalSettings initializes the options map and sets all options to their default values
+func InitGlobalSettings() {
 	defaults := DefaultGlobalSettings()
 	var parsed map[string]interface{}
 
@@ -36,12 +39,52 @@ func InitSettings() {
 		globalSettings[k] = v
 	}
 	for k, v := range parsed {
-		globalSettings[k] = v
+		if !strings.HasPrefix(reflect.TypeOf(v).String(), "map") {
+			globalSettings[k] = v
+		}
 	}
 
-	err := WriteSettings(filename)
-	if err != nil {
-		TermMessage("Error writing settings.json file: " + err.Error())
+	if _, err := os.Stat(filename); os.IsNotExist(err) {
+		err := WriteSettings(filename)
+		if err != nil {
+			TermMessage("Error writing settings.json file: " + err.Error())
+		}
+	}
+}
+
+// InitLocalSettings scans the json in settings.json and sets the options locally based
+// on whether the buffer matches the glob
+func InitLocalSettings(buf *Buffer) {
+	var parsed map[string]interface{}
+
+	filename := configDir + "/settings.json"
+	if _, e := os.Stat(filename); e == nil {
+		input, err := ioutil.ReadFile(filename)
+		if err != nil {
+			TermMessage("Error reading settings.json file: " + err.Error())
+			return
+		}
+
+		err = json.Unmarshal(input, &parsed)
+		if err != nil {
+			TermMessage("Error reading settings.json:", err.Error())
+		}
+	}
+
+	for k, v := range parsed {
+		if strings.HasPrefix(reflect.TypeOf(v).String(), "map") {
+			g, err := glob.Compile(k)
+			if err != nil {
+				TermMessage("Error with glob setting ", k, ": ", err)
+				continue
+			}
+
+			if g.MatchString(buf.Path) {
+				for k1, v1 := range v.(map[string]interface{}) {
+					buf.Settings[k1] = v1
+				}
+			}
+		}
 	}
 }
 
@@ -49,7 +92,30 @@ func InitSettings() {
 func WriteSettings(filename string) error {
 	var err error
 	if _, e := os.Stat(configDir); e == nil {
-		txt, _ := json.MarshalIndent(globalSettings, "", "    ")
+		var parsed map[string]interface{}
+
+		filename := configDir + "/settings.json"
+		if _, e := os.Stat(filename); e == nil {
+			input, err := ioutil.ReadFile(filename)
+			if err != nil {
+				return err
+			}
+
+			err = json.Unmarshal(input, &parsed)
+			if err != nil {
+				TermMessage("Error reading settings.json:", err.Error())
+			}
+		}
+
+		for k, v := range parsed {
+			if !strings.HasPrefix(reflect.TypeOf(v).String(), "map") {
+				if _, ok := globalSettings[k]; ok {
+					parsed[k] = globalSettings[k]
+				}
+			}
+		}
+
+		txt, _ := json.MarshalIndent(parsed, "", "    ")
 		err = ioutil.WriteFile(filename, txt, 0644)
 	}
 	return err

runtime/help/options.md

@@ -131,3 +131,22 @@ in all buffers.
 
 The `colorscheme` option is global only, and the `filetype` option is local only. To
 set an option locally, use `setlocal` instead of `set`.
+
+In the `settings.json` file you can also put set options locally by specifying a glob.
+Here is an example which has `tabstospaces` on for all files except Go files, and
+`tabsize` 4 for all files except Ruby files:
+
+```
+{
+    "*.go": {
+        "tabstospaces": false
+    },
+    "*.rb": {
+        "tabsize": 2
+    }
+    "tabstospaces": true,
+    "tabsize": 4,
+}
+```
+
+As you can see it is quite easy to set options locally using the `settings.json` file.