From 12a4dd58f32f809641cf6faf25a2146fe8da83df Mon Sep 17 00:00:00 2001
From: Zachary Yedidia <zyedidia@gmail.com>
Date: Sat, 23 Sep 2017 20:56:08 -0400
Subject: [PATCH] Only replace '~' with home if at start of path

Ref #757
---
 cmd/micro/autocomplete.go |  8 +-------
 cmd/micro/buffer.go       |  4 +---
 cmd/micro/command.go      | 13 ++++---------
 cmd/micro/util.go         | 16 ++++++++++++++++
 cmd/micro/view.go         |  4 +---
 5 files changed, 23 insertions(+), 22 deletions(-)

diff --git a/cmd/micro/autocomplete.go b/cmd/micro/autocomplete.go
index 9fba8f53..8599c9ae 100644
--- a/cmd/micro/autocomplete.go
+++ b/cmd/micro/autocomplete.go
@@ -4,8 +4,6 @@ import (
 	"io/ioutil"
 	"os"
 	"strings"
-
-	"github.com/mitchellh/go-homedir"
 )
 
 var pluginCompletions []func(string) []string
@@ -22,13 +20,9 @@ func FileComplete(input string) (string, []string) {
 	var files []os.FileInfo
 	var err error
 	if len(dirs) > 1 {
-		home, _ := homedir.Dir()
-
 		directories := strings.Join(dirs[:len(dirs)-1], sep) + sep
 
-		if strings.HasPrefix(directories, "~") {
-			directories = strings.Replace(directories, "~", home, 1)
-		}
+		directories = ReplaceHome(directories)
 		files, err = ioutil.ReadDir(directories)
 	} else {
 		files, err = ioutil.ReadDir(".")
diff --git a/cmd/micro/buffer.go b/cmd/micro/buffer.go
index 776ee65d..25c0dc28 100644
--- a/cmd/micro/buffer.go
+++ b/cmd/micro/buffer.go
@@ -16,7 +16,6 @@ import (
 	"time"
 	"unicode/utf8"
 
-	"github.com/mitchellh/go-homedir"
 	"github.com/zyedidia/micro/cmd/micro/highlight"
 )
 
@@ -385,7 +384,6 @@ func (b *Buffer) Serialize() error {
 // SaveAs saves the buffer to a specified path (filename), creating the file if it does not exist
 func (b *Buffer) SaveAs(filename string) error {
 	b.UpdateRules()
-	dir, _ := homedir.Dir()
 	if b.Settings["rmtrailingws"].(bool) {
 		r, _ := regexp.Compile(`[ \t]+$`)
 		for lineNum, line := range b.Lines(0, b.NumLines) {
@@ -408,7 +406,7 @@ func (b *Buffer) SaveAs(filename string) error {
 	data := []byte(str)
 	err := ioutil.WriteFile(filename, data, 0644)
 	if err == nil {
-		b.Path = strings.Replace(filename, "~", dir, 1)
+		b.Path = ReplaceHome(filename)
 		b.IsModified = false
 		b.ModTime, _ = GetModTime(filename)
 		return b.Serialize()
diff --git a/cmd/micro/command.go b/cmd/micro/command.go
index 0947cd77..3c5baa26 100644
--- a/cmd/micro/command.go
+++ b/cmd/micro/command.go
@@ -14,7 +14,6 @@ import (
 	"strings"
 
 	humanize "github.com/dustin/go-humanize"
-	"github.com/mitchellh/go-homedir"
 )
 
 // A Command contains a action (a function to call) as well as information about how to autocomplete the command
@@ -230,8 +229,7 @@ func TabSwitch(args []string) {
 // Cd changes the current working directory
 func Cd(args []string) {
 	if len(args) > 0 {
-		home, _ := homedir.Dir()
-		path := strings.Replace(args[0], "~", home, 1)
+		path := ReplaceHome(args[0])
 		os.Chdir(path)
 		for _, tab := range tabs {
 			for _, view := range tab.views {
@@ -325,8 +323,7 @@ func VSplit(args []string) {
 		CurView().VSplit(NewBufferFromString("", ""))
 	} else {
 		filename := args[0]
-		home, _ := homedir.Dir()
-		filename = strings.Replace(filename, "~", home, 1)
+		filename = ReplaceHome(filename)
 		file, err := os.Open(filename)
 		fileInfo, _ := os.Stat(filename)
 
@@ -355,8 +352,7 @@ func HSplit(args []string) {
 		CurView().HSplit(NewBufferFromString("", ""))
 	} else {
 		filename := args[0]
-		home, _ := homedir.Dir()
-		filename = strings.Replace(filename, "~", home, 1)
+		filename = ReplaceHome(filename)
 		file, err := os.Open(filename)
 		fileInfo, _ := os.Stat(filename)
 
@@ -396,8 +392,7 @@ func NewTab(args []string) {
 		CurView().AddTab(true)
 	} else {
 		filename := args[0]
-		home, _ := homedir.Dir()
-		filename = strings.Replace(filename, "~", home, 1)
+		filename = ReplaceHome(filename)
 		file, err := os.Open(filename)
 		fileInfo, _ := os.Stat(filename)
 
diff --git a/cmd/micro/util.go b/cmd/micro/util.go
index bbcc4f55..3cc842bd 100644
--- a/cmd/micro/util.go
+++ b/cmd/micro/util.go
@@ -12,6 +12,7 @@ import (
 	"unicode/utf8"
 
 	"github.com/mattn/go-runewidth"
+	homedir "github.com/mitchellh/go-homedir"
 )
 
 // Util.go is a collection of utility functions that are used throughout
@@ -363,3 +364,18 @@ func JoinCommandArgs(args ...string) string {
 
 	return buf.String()
 }
+
+// ReplaceHome takes a path as input and replaces ~ at the start of the path with the user's
+// home directory. Does nothing if the path does not start with '~'.
+func ReplaceHome(path string) string {
+	if !strings.HasPrefix(path, "~") {
+		return path
+	}
+
+	home, err := homedir.Dir()
+	if err != nil {
+		messenger.Error("Could not find home directory: ", err)
+		return path
+	}
+	return strings.Replace(path, "~", home, 1)
+}
diff --git a/cmd/micro/view.go b/cmd/micro/view.go
index 2fd3f3e4..bdcfdcf3 100644
--- a/cmd/micro/view.go
+++ b/cmd/micro/view.go
@@ -6,7 +6,6 @@ import (
 	"strings"
 	"time"
 
-	"github.com/mitchellh/go-homedir"
 	"github.com/zyedidia/tcell"
 )
 
@@ -244,8 +243,7 @@ func (v *View) OpenBuffer(buf *Buffer) {
 
 // Open opens the given file in the view
 func (v *View) Open(filename string) {
-	home, _ := homedir.Dir()
-	filename = strings.Replace(filename, "~", home, 1)
+	filename = ReplaceHome(filename)
 	file, err := os.Open(filename)
 	fileInfo, _ := os.Stat(filename)