Feature: Add flag for install location (optional)

Add the ability to pass -i or --install to change the default install location for the Terraform binaries

README.md

@@ -13,30 +13,36 @@ The installation is minimal and easy.
 Once installed, simply select the version you require from the dropdown and start using Terraform.
 
 ## Documentation
+
 Click [here](https://tfswitch.warrensbox.com) for our extended documentation.
 
 ## NOTE
+
 Going forward we will change the version identifier of `tfswitch` to align with the common go package versioning.  
 Please be advised to change any automated implementation you might have that is relying on the `tfswitch` version string.  
 **Old version string:** `0.1.2412`  
 **New version string:** `v1.0.0` Note the `v` that is preceding all version numbers.
 
 ## Installation
-`tfswitch` is available as a binary and on various package managers (eg. Homebrew). 
+
+`tfswitch` is available as a binary and on various package managers (eg. Homebrew).
 
 ## Windows
+
 Download and extract the Windows version of `tfswitch` that is compatible with your system.  
 We are building binaries for 386, amd64, arm6 and arm7 CPU structure.  
 See the [release page](https://github.com/warrensbox/terraform-switcher/releases/latest) for your download.
 
 ## Homebrew
+
 For macOS or various Linux distributions, Homebrew offers the simplest installation process. <a href="https://brew.sh/" target="_blank">If you do not have homebrew installed, click here</a>.
 
 ```ruby
 brew install warrensbox/tap/tfswitch
 ```
 
 ## Linux
+
 Installation for Linux operating systems.
 
 ```sh
@@ -59,34 +65,41 @@ Alternatively, you can install the binary from the source <a href="https://githu
 
 See [our installation documentation](https://tfswitch.warrensbox.com/Install) for more details.
 
-> [!IMPORTANT]    
+> [!IMPORTANT]
 > The version identifier of `tfswitch` has changed to align with the common `go` package versioning.
 >
 > Version numbers will now be prefixed with a `v` - eg. `v1.0.3`.
 >
-> Please change any automated implementations relying on the `tfswitch` version string. 
+> Please change any automated implementations relying on the `tfswitch` version string.
 >
 > **Old version string:** `0.1.2412`
 > **New version string:** `v1.0.3`
 
 [Having trouble installing](https://tfswitch.warrensbox.com/Troubleshoot/)
 
 ## Quick Start
+
 ### Dropdown Menu
+
 Execute `tfswitch` and select the desired Terraform version via the dropdown menu.
+
 ### Version on command line
+
 Use `tfswitch 1.7.0` to install Terraform version 1.7.0. Replace the version number as required.
 
 More [usage guide here](https://tfswitch.warrensbox.com/Quick-Start/)
 
 ## How to contribute
-An open source project becomes meaningful when people collaborate to improve the code.    
+
+An open source project becomes meaningful when people collaborate to improve the code.
 Feel free to look at the code, critique and make suggestions. Let's make `tfswitch` better!
 
 See step-by-step instructions on how to contribute here: [Contribute](https://tfswitch.warrensbox.com/How-to-Contribute/)
 
 ## Additional Info
+
 See how to *upgrade*, *uninstall*, *troubleshoot* here: [More info](https://tfswitch.warrensbox.com/Upgrade-or-Uninstall/)
 
 ## Issues
-Please open  *issues* here: [New Issue](https://github.com/warrensbox/terraform-switcher/issues)
+
+Please open *issues* here: [New Issue](https://github.com/warrensbox/terraform-switcher/issues)

lib/install.go

@@ -14,7 +14,7 @@ import (
 const (
 	installFile               = "terraform"
 	versionPrefix             = "terraform_"
-	installPath               = ".terraform.versions"
+	installDir                = ".terraform.versions"
 	recentFile                = "RECENT"
 	defaultBin                = "/usr/local/bin/terraform" //default bin installation dir
 	tfDarwinArm64StartVersion = "1.0.2"
@@ -48,19 +48,10 @@ func initialize(binPath string) {
 }
 
 // GetInstallLocation : get location where the terraform binary will be installed,
-// will create a directory in the home location if it does not exist
-func GetInstallLocation() string {
-	/* get current user */
-	homedir, errCurr := homedir.Dir()
-	if errCurr != nil {
-		logger.Fatal(errCurr)
-		os.Exit(1)
-	}
-
-	userCommon := homedir
-
+// will create the installDir if it does not exist
+func GetInstallLocation(installPath string) string {
 	/* set installation location */
-	installLocation = filepath.Join(userCommon, installPath)
+	installLocation = filepath.Join(installPath, installDir)
 
 	/* Create local installation directory if it does not exist */
 	CreateDirIfNotExist(installLocation)
@@ -70,16 +61,16 @@ func GetInstallLocation() string {
 }
 
 // Install : Install the provided version in the argument
-func Install(tfversion string, binPath string, mirrorURL string) {
+func Install(tfversion string, binPath string, installPath string, mirrorURL string) {
 	/* Check to see if user has permission to the default bin location which is  "/usr/local/bin/terraform"
 	 * If user does not have permission to default bin location, proceed to create $HOME/bin and install the tfswitch there
 	 * Inform user that they don't have permission to default location, therefore tfswitch was installed in $HOME/bin
 	 * Tell users to add $HOME/bin to their path
 	 */
 	binPath = InstallableBinLocation(binPath)
 
-	initialize(binPath)                    //initialize path
-	installLocation = GetInstallLocation() //get installation location -  this is where we will put our terraform binary file
+	initialize(binPath)                               //initialize path
+	installLocation = GetInstallLocation(installPath) //get installation location -  this is where we will put our terraform binary file
 
 	goarch := runtime.GOARCH
 	goos := runtime.GOOS
@@ -108,7 +99,7 @@ func Install(tfversion string, binPath string, mirrorURL string) {
 		/* set symlink to desired version */
 		CreateSymlink(installFileVersionPath, binPath)
 		logger.Infof("Switched terraform to version %q", tfversion)
-		AddRecent(tfversion) //add to recent file for faster lookup
+		AddRecent(tfversion, installPath) //add to recent file for faster lookup
 		os.Exit(0)
 	}
 
@@ -152,14 +143,14 @@ func Install(tfversion string, binPath string, mirrorURL string) {
 	/* set symlink to desired version */
 	CreateSymlink(installFileVersionPath, binPath)
 	logger.Infof("Switched terraform to version %q", tfversion)
-	AddRecent(tfversion) //add to recent file for faster lookup
+	AddRecent(tfversion, installPath) //add to recent file for faster lookup
 	os.Exit(0)
 }
 
 // AddRecent : add to recent file
-func AddRecent(requestedVersion string) {
+func AddRecent(requestedVersion string, installPath string) {
 
-	installLocation = GetInstallLocation() //get installation location -  this is where we will put our terraform binary file
+	installLocation = GetInstallLocation(installPath) //get installation location -  this is where we will put our terraform binary file
 	versionFile := filepath.Join(installLocation, recentFile)
 
 	fileExist := CheckFileExist(versionFile)
@@ -175,7 +166,7 @@ func AddRecent(requestedVersion string) {
 			if !ValidVersionFormat(line) {
 				logger.Infof("File %q is dirty (recreating cache file)", versionFile)
 				RemoveFiles(versionFile)
-				CreateRecentFile(requestedVersion)
+				CreateRecentFile(requestedVersion, installPath)
 				return
 			}
 		}
@@ -195,14 +186,14 @@ func AddRecent(requestedVersion string) {
 		}
 
 	} else {
-		CreateRecentFile(requestedVersion)
+		CreateRecentFile(requestedVersion, installPath)
 	}
 }
 
 // GetRecentVersions : get recent version from file
-func GetRecentVersions() ([]string, error) {
+func GetRecentVersions(installPath string) ([]string, error) {
 
-	installLocation = GetInstallLocation() //get installation location -  this is where we will put our terraform binary file
+	installLocation = GetInstallLocation(installPath) //get installation location -  this is where we will put our terraform binary file
 	versionFile := filepath.Join(installLocation, recentFile)
 
 	fileExist := CheckFileExist(versionFile)
@@ -239,9 +230,9 @@ func GetRecentVersions() ([]string, error) {
 }
 
 // CreateRecentFile : create a recent file
-func CreateRecentFile(requestedVersion string) {
+func CreateRecentFile(requestedVersion string, installPath string) {
 
-	installLocation = GetInstallLocation() //get installation location -  this is where we will put our terraform binary file
+	installLocation = GetInstallLocation(installPath) //get installation location -  this is where we will put our terraform binary file
 
 	WriteLines([]string{requestedVersion}, filepath.Join(installLocation, recentFile))
 }

lib/symlink.go

@@ -91,7 +91,6 @@ func CheckSymlink(symlinkPath string) bool {
 // ChangeSymlink : move symlink to existing binary
 func ChangeSymlink(binVersionPath string, binPath string) {
 
-	//installLocation = GetInstallLocation() //get installation location -  this is where we will put our terraform binary file
 	binPath = InstallableBinLocation(binPath)
 
 	/* remove current symlink if exist*/