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|
// Command fsnotify provides example usage of the fsnotify library.
package main
import (
"fmt"
"os"
"path/filepath"
"time"
)
var usage = `
fsnotify is a Go library to provide cross-platform file system notifications.
This command serves as an example and debugging tool.
https://github.com/fsnotify/fsnotify
Commands:
watch [paths] Watch the paths for changes and print the events.
file [file] Watch a single file for changes.
dedup [paths] Watch the paths for changes, suppressing duplicate events.
`[1:]
func exit(format string, a ...interface{}) {
fmt.Fprintf(os.Stderr, filepath.Base(os.Args[0])+": "+format+"\n", a...)
fmt.Print("\n" + usage)
os.Exit(1)
}
func help() {
fmt.Printf("%s [command] [arguments]\n\n", filepath.Base(os.Args[0]))
fmt.Print(usage)
os.Exit(0)
}
// Print line prefixed with the time (a bit shorter than log.Print; we don't
// really need the date and ms is useful here).
func printTime(s string, args ...interface{}) {
fmt.Printf(time.Now().Format("15:04:05.0000")+" "+s+"\n", args...)
}
func main() {
if len(os.Args) == 1 {
help()
}
// Always show help if -h[elp] appears anywhere before we do anything else.
for _, f := range os.Args[1:] {
switch f {
case "help", "-h", "-help", "--help":
help()
}
}
cmd, args := os.Args[1], os.Args[2:]
switch cmd {
default:
exit("unknown command: %q", cmd)
case "watch":
watch(args...)
case "file":
file(args...)
case "dedup":
dedup(args...)
}
}
|
