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cli.go
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/
cli.go
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// Copyright 2015 The Cockroach Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
// implied. See the License for the specific language governing
// permissions and limitations under the License.
package cli
import (
"fmt"
"math/rand"
"os"
"text/tabwriter"
"github.com/mattn/go-isatty"
"github.com/spf13/cobra"
"golang.org/x/net/context"
"github.com/cockroachdb/cockroach/pkg/build"
"github.com/cockroachdb/cockroach/pkg/util/log"
"github.com/cockroachdb/cockroach/pkg/util/randutil"
)
// Main is the entry point for the cli, with a single line calling it intended
// to be the body of an action package main `main` func elsewhere. It is
// abstracted for reuse by duplicated `main` funcs in different distributions.
func Main() {
// Seed the math/rand RNG from crypto/rand.
rand.Seed(randutil.NewPseudoSeed())
if len(os.Args) == 1 {
os.Args = append(os.Args, "help")
}
log.SetupCrashReporter(
context.Background(),
os.Args[1],
)
defer log.RecoverAndReportPanic(context.Background(), &serverCfg.Settings.SV)
if err := Run(os.Args[1:]); err != nil {
fmt.Fprintf(stderr, "Failed running %q\n", os.Args[1])
os.Exit(ErrorCode)
}
}
// stderr aliases log.OrigStderr; we use an alias here so that tests
// in this package can redirect the output of CLI commands to stdout
// to be captured.
var stderr = log.OrigStderr
var versionCmd = &cobra.Command{
Use: "version",
Short: "output version information",
Long: `
Output build version information.
`,
RunE: func(cmd *cobra.Command, args []string) error {
info := build.GetInfo()
tw := tabwriter.NewWriter(os.Stdout, 2, 1, 2, ' ', 0)
fmt.Fprintf(tw, "Build Tag: %s\n", info.Tag)
fmt.Fprintf(tw, "Build Time: %s\n", info.Time)
fmt.Fprintf(tw, "Distribution: %s\n", info.Distribution)
fmt.Fprintf(tw, "Platform: %s\n", info.Platform)
fmt.Fprintf(tw, "Go Version: %s\n", info.GoVersion)
fmt.Fprintf(tw, "C Compiler: %s\n", info.CgoCompiler)
fmt.Fprintf(tw, "Build SHA-1: %s\n", info.Revision)
fmt.Fprintf(tw, "Build Type: %s\n", info.Type)
return tw.Flush()
},
}
var cockroachCmd = &cobra.Command{
Use: "cockroach [command] (flags)",
Short: "CockroachDB command-line interface and server",
// TODO(cdo): Add a pointer to the docs in Long.
Long: `CockroachDB command-line interface and server.`,
// Disable automatic printing of usage information whenever an error
// occurs. Many errors are not the result of a bad command invocation,
// e.g. attempting to start a node on an in-use port, and printing the
// usage information in these cases obscures the cause of the error.
// Commands should manually print usage information when the error is,
// in fact, a result of a bad invocation, e.g. too many arguments.
SilenceUsage: true,
}
// isInteractive indicates whether both stdin and stdout refer to the
// terminal.
var isInteractive = isatty.IsTerminal(os.Stdout.Fd()) &&
isatty.IsTerminal(os.Stdin.Fd())
func init() {
cobra.EnableCommandSorting = false
// Set an error function for flag parsing which prints the usage message.
cockroachCmd.SetFlagErrorFunc(func(c *cobra.Command, err error) error {
if err := c.Usage(); err != nil {
return err
}
fmt.Fprintln(c.OutOrStderr()) // provide a line break between usage and error
return err
})
cockroachCmd.AddCommand(
startCmd,
initCmd,
certCmd,
quitCmd,
sqlShellCmd,
userCmd,
zoneCmd,
nodeCmd,
dumpCmd,
// Miscellaneous commands.
// TODO(pmattis): stats
genCmd,
versionCmd,
debugCmd,
)
}
// AddCmd adds a command to the cli.
func AddCmd(c *cobra.Command) {
cockroachCmd.AddCommand(c)
}
// Run ...
func Run(args []string) error {
cockroachCmd.SetArgs(args)
return cockroachCmd.Execute()
}