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options.go
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options.go
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package archive
import (
"fmt"
flag "github.com/spf13/pflag"
"os"
)
const defaultArchiveName = ".archive.tar"
var (
flagAdd = flag.StringP("add", "a", "", "Add file to archive of current directory")
flagUnarchive = flag.StringP("unarchive", "u", "", "Unarchive file from archive of current directory")
flagArchiveName = flag.StringP("archive-name", "n", defaultArchiveName, "Use a custom archive name instead of the default .archive.tar")
flagGzip = flag.BoolP("gzip", "z", false, "Used with -a to gzip the file/dir before archiving it. Original file is not affected (i.e. not gzipped) but will be deleted if -d is passed.")
flagDelete = flag.BoolP("delete", "d", false, "Pass flag to -a, -u or -z to delete file in dir/archive after operation")
flagList = flag.BoolP("list", "l", false, "List the files in current directory archive")
flagTopLevel = flag.BoolP("top-level", "t", false, "List only top-level files and directories in current directory archive")
flagHelp = flag.BoolP("help", "h", false, "Print this help and exit")
flagVersion = flag.BoolP("version", "v", false, "Print version and exit")
)
// ParseOptions parses the flags passed and executes the appropriate options.
func ParseOptions() {
flag.CommandLine.SortFlags = false
flag.Parse()
if *flagAdd != "" {
execOptionAdd()
} else if *flagUnarchive != "" {
execOptionUnarchive()
} else if *flagList {
execOptionList()
} else if *flagTopLevel {
execOptionTopLevel()
} else if *flagHelp {
execOptionHelp()
} else if *flagVersion {
execOptionVersion()
} else {
execOptionHelp()
}
}
func execOptionAdd() {
if *flagGzip {
execAdd()
} else {
execAddGzipped()
}
}
func execAdd() {
gzippedFileName, err := AddToArchiveGzipped(*flagAdd, *flagArchiveName, *flagDelete)
if err == nil {
fmt.Println(*flagAdd, "added to archive as a gzipped file with name", gzippedFileName)
} else {
fmt.Print(err)
os.Exit(1)
}
}
func execAddGzipped() {
err := AddToArchive(*flagAdd, *flagArchiveName, *flagDelete)
if err == nil {
fmt.Println(*flagAdd, "added to archive")
} else {
fmt.Print(err)
os.Exit(1)
}
}
func execOptionUnarchive() {
err := Unarchive(*flagUnarchive, *flagArchiveName, *flagDelete)
if err == nil {
fmt.Println("Retrieved", *flagUnarchive, "from archive")
if *flagDelete {
fmt.Println("Deleted", *flagUnarchive, "from archive permanently")
}
} else {
fmt.Print(err)
os.Exit(1)
}
}
func execOptionList() {
out, err := ListArchive(*flagArchiveName)
if err == nil {
fmt.Println("Files in archive:")
fmt.Print(out)
} else {
fmt.Println(err)
os.Exit(1)
}
}
func execOptionTopLevel() {
out, err := ListArchiveTopLevel(*flagArchiveName)
if err == nil {
fmt.Println("Top-level files in archive:")
fmt.Print(out)
} else {
fmt.Println(err)
os.Exit(1)
}
}
func execOptionHelp() {
PrintHelp()
}
func execOptionVersion() {
PrintVersion()
}