Add support for setting local settings via filetype

cmd/micro/settings.go

@@ -100,15 +100,23 @@ func InitLocalSettings(buf *Buffer) {
 
 	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 strings.HasPrefix(k, "ft:") {
+				if buf.Settings["filetype"].(string) == k[3:] {
+					for k1, v1 := range v.(map[string]interface{}) {
+						buf.Settings[k1] = v1
+					}
+				}
+			} else {
+				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
+				if g.MatchString(buf.Path) {
+					for k1, v1 := range v.(map[string]interface{}) {
+						buf.Settings[k1] = v1
+					}
 				}
 			}
 		}

runtime/help/options.md

@@ -249,10 +249,25 @@ will set the option 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
+In the `settings.json` file you can also put set options locally by specifying either
+a glob or a filetype. Here is an example which has `tabstospaces` on for all files except Go
 files, and `tabsize` 4 for all files except Ruby files:
 
+```json
+{
+	"ft:go": {
+		"tabstospaces": false
+	},
+	"ft:ruby": {
+		"tabsize": 2
+	},
+	"tabstospaces": true,
+	"tabsize": 4
+}
+```
+
+Or similarly you can match with globs:
+
 ```json
 {
 	"*.go": {
@@ -265,6 +280,3 @@ files, and `tabsize` 4 for all files except Ruby files:
 	"tabsize": 4
 }
 ```
-
-As you can see it is quite easy to set options locally using the `settings.json`
-file.