Merge pull request #26 from navilg/25-k8senv-cached-program-locations…

…-doesnot-clear-automatically-in-shell

Add a message after use and unuse to clear cached program location

README.md

@@ -114,6 +114,12 @@ k8senv use kubectl 1.26.2
 k8senv kubectl use v1.26.2
 ```
 
+If you were using system installed version of `kubectl` in same shell session, you will need to clear the cached path of the kubectl using below command.
+
+```
+hash -d kubectl
+```
+
 **Unuse/Disable k8senv managed kubectl**
 
 Any of the below command can be used to unuse or disable k8senv managed kubectl without uninstalling it. This will reset the system to use system installed kubectl, if present.
@@ -123,6 +129,12 @@ k8senv unuse kubectl
 k8senv kubectl unuse
 ```
 
+To clear the cached k8senv path of kubectl, you will need to clear it using below command before you can use system installed version of the tool.
+
+```
+hash -d kubectl
+```
+
 **Remove an existing version of kubectl**
 
 Any of below commands can be used to remove kubectl version 1.26.2.

internal/unuse/unuse.go

@@ -4,6 +4,7 @@ import (
 	"errors"
 	"fmt"
 	"os"
+	"runtime"
 
 	"github.com/navilg/k8senv/internal/config"
 )
@@ -22,6 +23,11 @@ func UnuseVersions(toolname string) error {
 		if err != nil {
 			fmt.Println("Failed to unuse", toolname)
 			fmt.Println("Due to,", err)
+			return err
+		}
+		fmt.Println(toolname, "successfully set to unuse.")
+		if runtime.GOOS == "linux" {
+			fmt.Println("Bash shell caches the program location. You might need to run 'hash -d " + toolname + "' to clear it for this to work.")
 		}
 	}
 

internal/use/use.go

@@ -4,6 +4,7 @@ import (
 	"errors"
 	"fmt"
 	"os"
+	"runtime"
 	"strings"
 
 	"github.com/navilg/k8senv/internal/config"
@@ -52,5 +53,10 @@ func UseVersion(toolname, version string) error {
 
 	fmt.Println("Using", toolname, version, "as default.")
 
+	if runtime.GOOS == "linux" {
+
+		fmt.Println("Bash shell caches the program location. You might need to run 'hash -d " + toolname + "' to clear it for this to work.")
+	}
+
 	return nil
 }