Add fyne-cross stuff into gitignore and update README

.gitignore

@@ -4,10 +4,20 @@
 *.dll
 *.so
 *.dylib
+
+# Produced by a regular go build inside src.
 src/src
 
 # Test binary, build with `go test -c`
 *.test
 
 # Output of the go coverage tool, specifically when used with LiteIDE
 *.out
+
+# Files created and used when using fyne-cross
+fyne.syso
+*.tar.gz
+*.tar.xz
+*.app
+src/usr
+build

README.md

@@ -11,6 +11,28 @@
 Sparta, a Sport and Rehearsal Tracking Application with a focus for privacy and security.
 The application uses encryption and locally stored files to keep your activities private and hidden from spying eyes.
 
+## Cross compiling using fyne-cross
+Run the following command from the root of the repo:
+```bash
+sudo ../../bin/fyne-cross --targets=windows/amd64,darwin/amd64,linux/amd64 --output=sparta ./src/
+```
+
+## Packaging the logo
+Run the following command for bundling the icon in a windows binary:
+```bash
+(cd src && ../../../bin/fyne package -icon ../assets/bundled-logo.png -executable ../sparta-windows-amd64.exe -os windows -name sparta)
+```
+
+Run the following command for bundling the icon in a macos binary:
+```bash
+(cd src && ../../../bin/fyne package -icon ../assets/bundled-logo.png -executable ../sparta-darwin-amd64 -os darwin -name sparta)
+```
+
+Run the following command for bundling the icon in a linux binary and installer:
+```bash
+(cd src && ../../../bin/fyne package -icon ../assets/bundled-logo.png -executable ../sparta-linux-amd64 -os linux -name sparta)
+```
+
 ## Folder structure:
 - assets/ : Storage of icons used in the project.
 - src/ : The place where all application code is placed and home of the simple main.go file.

src/file/file.go

@@ -6,6 +6,7 @@ import (
 	"io/ioutil"
 	"os"
 	"path/filepath"
+	"runtime"
 	"sparta/src/file/encrypt"
 	"strconv"
 	"time"
@@ -32,12 +33,36 @@ type Exercise struct {
 
 // Config returns the config directory and handles the error accordingly.
 func config() string {
-	directory, err := os.UserConfigDir()
-	if err != nil {
-		fmt.Print(err)
+	var dir string
+
+	// Workaround golang 1.12 in the cross compiling tool.
+	switch runtime.GOOS {
+	case "windows":
+		dir = os.Getenv("AppData")
+
+	case "darwin":
+		dir = os.Getenv("HOME")
+		dir += "/Library/Preferences"
+
+	default: // Unix
+		dir = os.Getenv("XDG_CONFIG_HOME")
+		if dir == "" {
+			dir = os.Getenv("HOME")
+			dir += "/.config"
+		}
 	}
 
-	return directory
+	return dir
+
+	/*
+		directory, err := os.UserConfigDir()
+		if err != nil {
+			fmt.Print(err)
+		}
+
+
+		return directory
+	*/
 }
 
 // DataFile specifies the loacation of our data file.