From 7bc8d77387076e7f94665c4493cc26348fdada12 Mon Sep 17 00:00:00 2001
From: 10sr <8slashes+git@gmail.com>
Date: Sat, 19 Nov 2016 01:53:48 +0900
Subject: [PATCH] Add Buffer.AbsPath and a plugin function DirectoryName (#455)

* Add Buffer.AbsPath

* Add a plugin function DirectoryName

* Update plugins.md
---
 cmd/micro/buffer.go     | 11 +++++++----
 cmd/micro/micro.go      |  1 +
 runtime/help/plugins.md |  2 ++
 3 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/cmd/micro/buffer.go b/cmd/micro/buffer.go
index b6fd672b..ac2ee42d 100644
--- a/cmd/micro/buffer.go
+++ b/cmd/micro/buffer.go
@@ -27,6 +27,8 @@ type Buffer struct {
 
 	// Path to the file on disk
 	Path string
+	// Absolute path to the file on disk
+	AbsPath string
 	// Name of the buffer on the status line
 	Name string
 
@@ -75,7 +77,10 @@ func NewBuffer(txt []byte, path string) *Buffer {
 		}
 	}
 
+	absPath, _ := filepath.Abs(path)
+
 	b.Path = path
+	b.AbsPath = absPath
 	b.Name = path
 
 	// If the file doesn't have a path to disk then we give it no name
@@ -136,8 +141,7 @@ func NewBuffer(txt []byte, path string) *Buffer {
 	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
-		absPath, _ := filepath.Abs(b.Path)
-		file, err := os.Open(configDir + "/buffers/" + EscapePath(absPath))
+		file, err := os.Open(configDir + "/buffers/" + EscapePath(b.AbsPath))
 		if err == nil {
 			var buffer SerializedBuffer
 			decoder := gob.NewDecoder(file)
@@ -246,8 +250,7 @@ func (b *Buffer) SaveWithSudo() error {
 // Serialize serializes the buffer to configDir/buffers
 func (b *Buffer) Serialize() error {
 	if b.Settings["savecursor"].(bool) || b.Settings["saveundo"].(bool) {
-		absPath, _ := filepath.Abs(b.Path)
-		file, err := os.Create(configDir + "/buffers/" + EscapePath(absPath))
+		file, err := os.Create(configDir + "/buffers/" + EscapePath(b.AbsPath))
 		if err == nil {
 			enc := gob.NewEncoder(file)
 			gob.Register(TextEvent{})
diff --git a/cmd/micro/micro.go b/cmd/micro/micro.go
index f3c1fbd7..227c654b 100644
--- a/cmd/micro/micro.go
+++ b/cmd/micro/micro.go
@@ -333,6 +333,7 @@ func main() {
 		return Loc{x, y}
 	}))
 	L.SetGlobal("JoinPaths", luar.New(L, filepath.Join))
+	L.SetGlobal("DirectoryName", luar.New(L, filepath.Dir))
 	L.SetGlobal("configDir", luar.New(L, configDir))
 	L.SetGlobal("Reload", luar.New(L, LoadAll))
 	L.SetGlobal("ByteOffset", luar.New(L, ByteOffset))
diff --git a/runtime/help/plugins.md b/runtime/help/plugins.md
index 5a35a56a..1789e33c 100644
--- a/runtime/help/plugins.md
+++ b/runtime/help/plugins.md
@@ -57,6 +57,8 @@ as Go's GOOS variable, so `darwin`, `windows`, `linux`, `freebsd`...)
 
 * `JoinPaths(dir... string) string` combines multiple directories to a full path
 
+* `DirectoryName(path string)` returns all but the last element of path ,typically the path's directory
+
 * `GetOption(name string)`: returns the value of the requested option
 
 * `AddOption(name string, value interface{})`: sets the given option with the given