package nix

import (
	"context"
	"iter"
	"os"
)

// Copy copies installables to the binary cache store.
func Copy(ctx Context, store Store, installables iter.Seq[string]) error {
	if store == nil {
		return os.ErrInvalid
	}

	c, cancel := context.WithCancel(ctx.Unwrap())
	defer cancel()

	cmd := ctx.Nix(c, CommandCopy,
		FlagTo, store.String(),
		FlagStdin)
	cmd.Env = append(os.Environ(), store.Environ()...)

	cmd.Stdout, cmd.Stderr = ctx.Streams()
	_, err := ctx.WriteStdin(cmd, installables, nil)
	return err
}