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package clients
import (
"errors"
"fmt"
"runtime"
"strings"
"github.com/mimecast/dtail/internal/clients/handlers"
"github.com/mimecast/dtail/internal/config"
"github.com/mimecast/dtail/internal/io/dlog"
"github.com/mimecast/dtail/internal/omode"
)
// GrepClient searches a remote file for all lines matching a regular
// expression. Only the matching lines are displayed.
type GrepClient struct {
baseClient
}
// NewGrepClient creates a new grep client.
func NewGrepClient(args config.Args) (*GrepClient, error) {
if args.RegexStr == "" {
return nil, errors.New("No regex specified, use '-regex' flag")
}
args.Mode = omode.GrepClient
c := GrepClient{
baseClient: baseClient{
Args: args,
throttleCh: make(chan struct{}, args.ConnectionsPerCPU*runtime.NumCPU()),
retry: false,
runtime: newClientRuntimeBoundary(config.CurrentRuntime()),
},
}
c.init()
c.makeConnections(c)
return &c, nil
}
func (c GrepClient) makeHandler(server string) handlers.Handler {
return handlers.NewClientHandler(server)
}
func (c GrepClient) makeCommands() (commands []string) {
regex, err := c.Regex.Serialize()
if err != nil {
dlog.Client.FatalPanic(err)
}
for _, file := range strings.Split(c.What, ",") {
commands = append(commands, fmt.Sprintf("%s:%s %s %s",
c.Mode.String(), c.Args.SerializeOptions(), file, regex))
}
return
}
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