minio/cmd/main.go
2016-09-21 09:44:57 -07:00

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/*
* Minio Cloud Storage, (C) 2015, 2016 Minio, Inc.
*
* 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 cmd
import (
"errors"
"fmt"
"os"
"sort"
"strings"
"github.com/minio/cli"
"github.com/minio/mc/pkg/console"
)
var (
// global flags for minio.
globalFlags = []cli.Flag{
cli.BoolFlag{
Name: "help, h",
Usage: "Show help.",
},
cli.StringFlag{
Name: "config-dir, C",
Value: mustGetConfigPath(),
Usage: "Path to configuration folder.",
},
cli.BoolFlag{
Name: "quiet",
Usage: "Suppress chatty output.",
},
}
)
// Help template for minio.
var minioHelpTemplate = `NAME:
{{.Name}} - {{.Usage}}
DESCRIPTION:
{{.Description}}
USAGE:
minio {{if .Flags}}[flags] {{end}}command{{if .Flags}}{{end}} [arguments...]
COMMANDS:
{{range .Commands}}{{join .Names ", "}}{{ "\t" }}{{.Usage}}
{{end}}{{if .Flags}}
FLAGS:
{{range .Flags}}{{.}}
{{end}}{{end}}
VERSION:
` + Version +
`{{ "\n"}}`
// init - check the environment before main starts
func init() {
// Check if minio was compiled using a supported version of Golang.
checkGoVersion()
// Set global trace flag.
globalTrace = os.Getenv("MINIO_TRACE") == "1"
// Set all the debug flags from ENV if any.
setGlobalsDebugFromEnv()
}
func migrate() {
// Migrate config file
err := migrateConfig()
fatalIf(err, "Config migration failed.")
// Migrate other configs here.
}
func enableLoggers() {
// Enable all loggers here.
enableConsoleLogger()
enableFileLogger()
// Add your logger here.
}
func findClosestCommands(command string) []string {
var closestCommands []string
for _, value := range commandsTree.PrefixMatch(command) {
closestCommands = append(closestCommands, value.(string))
}
sort.Strings(closestCommands)
// Suggest other close commands - allow missed, wrongly added and
// even transposed characters
for _, value := range commandsTree.walk(commandsTree.root) {
if sort.SearchStrings(closestCommands, value.(string)) < len(closestCommands) {
continue
}
// 2 is arbitrary and represents the max
// allowed number of typed errors
if DamerauLevenshteinDistance(command, value.(string)) < 2 {
closestCommands = append(closestCommands, value.(string))
}
}
return closestCommands
}
func registerApp() *cli.App {
// Register all commands.
registerCommand(serverCmd)
registerCommand(versionCmd)
registerCommand(updateCmd)
registerCommand(controlCmd)
// Set up app.
app := cli.NewApp()
app.Name = "Minio"
app.Author = "Minio.io"
app.Usage = "Cloud Storage Server."
app.Description = `Minio is an Amazon S3 compatible object storage server. Use it to store photos, videos, VMs, containers, log files, or any blob of data as objects.`
app.Flags = globalFlags
app.Commands = commands
app.CustomAppHelpTemplate = minioHelpTemplate
app.CommandNotFound = func(ctx *cli.Context, command string) {
msg := fmt.Sprintf("%s is not a minio sub-command. See minio --help.", command)
closestCommands := findClosestCommands(command)
if len(closestCommands) > 0 {
msg += fmt.Sprintf("\n\nDid you mean one of these?\n")
for _, cmd := range closestCommands {
msg += fmt.Sprintf(" %s\n", cmd)
}
}
console.Fatalln(msg)
}
return app
}
// Verify main command syntax.
func checkMainSyntax(c *cli.Context) {
configPath, err := getConfigPath()
if err != nil {
console.Fatalf("Unable to obtain user's home directory. \nError: %s\n", err)
}
if configPath == "" {
console.Fatalln("Config folder cannot be empty, please specify --config-dir <foldername>.")
}
}
// Main main for minio server.
func Main() {
app := registerApp()
app.Before = func(c *cli.Context) error {
configDir := c.GlobalString("config-dir")
if configDir == "" {
fatalIf(errors.New("Config directory is empty"), "Unable to get config file.")
}
// Sets new config folder.
setGlobalConfigPath(configDir)
// Valid input arguments to main.
checkMainSyntax(c)
// Migrate any old version of config / state files to newer format.
migrate()
// Initialize config.
err := initConfig()
fatalIf(err, "Unable to initialize minio config.")
// Enable all loggers by now.
enableLoggers()
// Init the error tracing module.
initError()
// Set global quiet flag.
globalQuiet = c.Bool("quiet") || c.GlobalBool("quiet")
// Do not print update messages, if quiet flag is set.
if !globalQuiet {
if strings.HasPrefix(Version, "RELEASE.") {
updateMsg, _, err := getReleaseUpdate(minioUpdateStableURL)
if err != nil {
// Ignore any errors during getReleaseUpdate() because
// the internet might not be available.
return nil
}
console.Println(updateMsg)
}
}
return nil
}
// Start profiler if env is set.
if profiler := os.Getenv("MINIO_PROFILER"); profiler != "" {
globalProfiler = startProfiler(profiler)
}
// Run the app - exit on error.
app.RunAndExitOnError()
}