Implement search path lookup in a local method

README.md

@@ -2,8 +2,12 @@
 
 Examples of methods for determining the directory path where our executable resides.
 
--	The `kardianos/osext` package is used for reference. The other methods will
-	require that the executable is located within the OS search path.
+-	The `github.com/kardianos/osext` package is used for reference. The other methods
+	will require that the executable is located within the OS search path.
 
 -	The first alternative utilizes `exec.LookPath` to find the executable within the
-	OS search path.
+	OS search path. This method depends on the `os`, `os/exec`, and `path` packages.
+
+-	The next method defines a local function to look for the file named in `args[0]`
+	in the directories listed in the `PATH` environment variable. This method depends
+	on the `os` and `strings` packages.

main.go

@@ -6,6 +6,7 @@ import (
 	"os"
 	"os/exec"
 	"path"
+	"strings"
 
 	"github.com/kardianos/osext"
 )
@@ -29,7 +30,22 @@ func main() {
 	}
 	lookPath := path.Dir(exePath)
 
+	// Walk the path environment locally
+	walkPath := pathWalker(os.Args[0])
+
 	// Output to comapre the results
 	fmt.Printf("osext.ExeFolder : %s\n", exeFolder)
 	fmt.Printf("exec.LookPath   : %s\n", lookPath)
+	fmt.Printf("local walkPath  : %s\n", walkPath)
+}
+
+func pathWalker(file string) string {
+	path := os.Getenv("PATH")
+	for _, dir := range strings.Split(path, ":") {
+		exe := dir + "/" + file
+		if _, err := os.Stat(exe); err == nil {
+			return dir
+		}
+	}
+	return "not found"
 }