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28 - 1
//usr/bin/env go run $0 $@; exit $?
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// ============================================================================
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// Create
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// name  : Andre Rikkert de Koe          date:   Mar 2018
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// descr : filefind
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//         This is a demo of programming in the Elixir language.
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//         Its part of a project to implement a program to create a directory
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//         tree similar to the output of the Unix find program.
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// EUID  : Any user who has read access to all the files being searched for.
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// run   : interactive
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//
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// Changes
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// name  :                               date:
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// descr : short description
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//
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// ============================================================================
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package main
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import (
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    "fmt"
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    "io/ioutil"
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     "log"
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    "os"
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)
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// =============================================================================
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// Functions
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// =============================================================================
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func Usage(progname, mesg string) {
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        log.Print("Usage: " + progname + " directory")
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        log.Fatal(mesg)
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}
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func traverse(s string) {
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	curdir, err :=  os.Getwd()
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	if err := os.Chdir(s); err != nil {
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		log.Fatal(err)
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	}
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	if err != nil {
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		log.Fatal(err)
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	}
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	curdir2, err := os.Getwd()
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	files, err := ioutil.ReadDir(curdir2)
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	if err != nil {
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		log.Fatal(err)
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	}
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	for _, f := range files {
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		fmt.Println (curdir2 + "/" + f.Name())
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		//fmt.Println(f.Name())
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		fi, err := os.Stat(f.Name())
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		if err != nil {
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			log.Fatal(err)
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		}
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		mode := fi.Mode();
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		if mode.IsDir() {
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			traverse(fi.Name())
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		}
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	}
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	os.Chdir(curdir)
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}
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func start_traverse(s string) {
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	fmt.Println(s)
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	traverse(s)
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}
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// =============================================================================
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// MAIN
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// =============================================================================
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func main() {
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	progname := os.Args[0]
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	if len(os.Args) == 2 {
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		directory := os.Args[1]
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		fi, err := os.Stat(directory)
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		if err != nil  {
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			_ = err // ugly hack to allow not using the err variable
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			Usage(progname, "ERROR: Not a directory : " + directory)
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		}
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		if fi.IsDir() {
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			start_traverse(directory)
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		} else {
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			Usage(progname, "ERROR: Not a directory : " + directory)
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		}
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	} else {
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		Usage(progname, "ERROR: 1 argument expected")
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	}
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}