Source a file inside golang and run a command before each listed line

Inside a golang program i want to source a file (in this case its .clean) which would look like this

$HOME/directory1
$HOME/directory1/.directory2
$HOME/directory3

and then run the rm -rf command before each directory.
Does anyone know how to accomplish this?

You can do this using a bufio.Scanner.

Bold text added by me.

>Scanner provides a convenient interface for reading data such as a file of newline-delimited lines of text. Successive calls to the Scan method will step through the 'tokens' of a file, skipping the bytes between the tokens. The specification of a token is defined by a split function of type SplitFunc; the default split function breaks the input into lines with line termination stripped. Split functions are defined in this package for scanning a file into lines, bytes, UTF-8-encoded runes, and space-delimited words. The client may instead provide a custom split function.

Example using os.RemoveAll():

package main

import (
	"bufio"
	"fmt"
	"log"
	"os"
)

func main() {
	f, err := os.Open(".clean")
	if err != nil {
		log.Fatal(err)
	}
	s := bufio.NewScanner(f)
	for s.Scan() {
		fmt.Println("Deleting:", s.Text())
		if err := os.RemoveAll(s.Text()); err != nil {
			log.Println(err)
		}
	}
	if err := s.Err(); err != nil {
		log.Fatal(err)
	}
}

Playground

Or, using Cmd.Run() from os/exec to run rm -rf:

package main

import (
	"bufio"
	"fmt"
	"log"
	"os"
	"os/exec"
)

func main() {
	f, err := os.Open("file.txt")
	if err != nil {
		log.Fatal(err)
	}
	s := bufio.NewScanner(f)
	for s.Scan() {
		fmt.Println("Deleting:", s.Text())
		cmd := exec.Command("rm", "-rf", s.Text())
		if err := cmd.Run(); err != nil {
			log.Println(err)
		}
	}
	if err := s.Err(); err != nil {
		log.Fatal(err)
	}
}

Playground

Instead of "sourcing" the file, you could instead just read it:

while IFS= read TARGET; do
    rm -fr "${TARGET/'$HOME'/$HOME}"
done < .clean

You can also add checks to it like skipping comments:

while read TARGET; do  ## Explicitly do not change IFS to exclude leading and trailing spaces.
    case "$TARGET" in
    \#*)
        # Skip comments.
        ;;
    *)
        rm -fr "${TARGET/'$HOME'/$HOME}"
        ;;
    esac
done < .clean

If you need more compatibility i.e. it doesn't support ${PARAM/X/Y} expansion method, just used sed anyway:

rm -fr "$(echo "$TARGET" | sed "s|$HOME|$HOME|")"  ## No 'g'. I doubt it's sensible to have two `$HOME`'s.