terraform/command/testdata/statelocker.go

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// statelocker use used for testing command with a locked state.
// This will lock the state file at a given path, then wait for a sigal. On
// SIGINT and SIGTERM the state will be Unlocked before exit.
package main
import (
"io"
"log"
"os"
"os/signal"
"syscall"
"time"
"github.com/hashicorp/terraform/command/clistate"
"github.com/hashicorp/terraform/states/statemgr"
)
func main() {
if len(os.Args) != 2 {
log.Fatal(os.Args[0], "statefile")
}
s := &clistate.LocalState{
Path: os.Args[1],
}
info := statemgr.NewLockInfo()
info.Operation = "test"
info.Info = "state locker"
lockID, err := s.Lock(info)
if err != nil {
io.WriteString(os.Stderr, err.Error())
return
}
// signal to the caller that we're locked
io.WriteString(os.Stdout, "LOCKID "+lockID)
defer func() {
if err := s.Unlock(lockID); err != nil {
io.WriteString(os.Stderr, err.Error())
}
}()
c := make(chan os.Signal, 1)
signal.Notify(c, syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP)
// timeout after 10 second in case we don't get cleaned up by the test
select {
case <-time.After(10 * time.Second):
case <-c:
}
}