/
main.go
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/
main.go
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/*
* Minio Client (C) 2014, 2015 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 main
import (
"fmt"
"os"
"runtime"
"sort"
"strconv"
"github.com/minio/cli"
"github.com/minio/minio-xl/pkg/probe"
"github.com/minio/minio/pkg/contentdb"
"github.com/minio/pb"
"github.com/olekukonko/ts"
)
var (
// global flags for mc.
mcFlags = []cli.Flag{
cli.BoolFlag{
Name: "help, h",
Usage: "Show help.",
},
}
)
// Help template for mc
var mcHelpTemplate = `NAME:
{{.Name}} - {{.Usage}}
USAGE:
{{.Name}} {{if .Flags}}[FLAGS] {{end}}COMMAND{{if .Flags}} [COMMAND FLAGS | -h]{{end}} [ARGUMENTS...]
COMMANDS:
{{range .Commands}}{{join .Names ", "}}{{ "\t" }}{{.Usage}}
{{end}}{{if .Flags}}
GLOBAL FLAGS:
{{range .Flags}}{{.}}
{{end}}{{end}}
VERSION:
` + mcVersion +
`{{ "\n"}}{{range $key, $value := ExtraInfo}}
{{$key}}:
{{$value}}
{{end}}`
// Function invoked when invalid command is passed.
func commandNotFound(ctx *cli.Context, command string) {
msg := fmt.Sprintf("‘%s’ is not a mc command. See ‘mc --help’.", command)
closestCommands := findClosestCommands(command)
if len(closestCommands) > 0 {
msg += fmt.Sprintf("\n\nDid you mean one of these?\n")
if len(closestCommands) == 1 {
cmd := closestCommands[0]
msg += fmt.Sprintf(" ‘%s’", cmd)
} else {
for _, cmd := range closestCommands {
msg += fmt.Sprintf(" ‘%s’\n", cmd)
}
}
}
fatalIf(errDummy().Trace(), msg)
}
// Check for sane config environment early on and gracefully report.
func checkConfig() {
// Ensures config file is sane.
_, err := loadMcConfig()
fatalIf(err.Trace(mustGetMcConfigPath()), "Unable to access configuration file.")
}
func migrate() {
// Fix broken config files if any.
fixConfig()
// Migrate config files if any.
migrateConfig()
// Migrate session files if any.
migrateSession()
// Migrate shared urls if any.
migrateShare()
}
// Get os/arch/platform specific information.
// Returns a map of current os/arch/platform/memstats.
func getSystemData() map[string]string {
host, e := os.Hostname()
fatalIf(probe.NewError(e), "Unable to determine the hostname.")
memstats := &runtime.MemStats{}
runtime.ReadMemStats(memstats)
mem := fmt.Sprintf("Used: %s | Allocated: %s | UsedHeap: %s | AllocatedHeap: %s",
pb.FormatBytes(int64(memstats.Alloc)),
pb.FormatBytes(int64(memstats.TotalAlloc)),
pb.FormatBytes(int64(memstats.HeapAlloc)),
pb.FormatBytes(int64(memstats.HeapSys)))
platform := fmt.Sprintf("Host: %s | OS: %s | Arch: %s", host, runtime.GOOS, runtime.GOARCH)
goruntime := fmt.Sprintf("Version: %s | CPUs: %s", runtime.Version(), strconv.Itoa(runtime.NumCPU()))
return map[string]string{
"PLATFORM": platform,
"RUNTIME": goruntime,
"MEM": mem,
}
}
func registerBefore(ctx *cli.Context) error {
setMcConfigDir(ctx.GlobalString("config-folder"))
// Verify golang runtime.
verifyMCRuntime()
// Migrate any old version of config / state files to newer format.
migrate()
// Set global flags.
setGlobalsFromContext(ctx)
// Checkconfig if it can be read.
checkConfig()
return nil
}
// findClosestCommands to match a given string with commands trie tree.
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 the commands (refer flags.go)
registerCmd(lsCmd) // List contents of a bucket.
registerCmd(mbCmd) // Make a bucket.
registerCmd(catCmd) // Display contents of a file.
registerCmd(pipeCmd) // Write contents of stdin to a file.
registerCmd(shareCmd) // Share documents via URL.
registerCmd(cpCmd) // Copy objects and files from multiple sources to single destination.
registerCmd(mirrorCmd) // Mirror objects and files from single source to multiple destinations.
registerCmd(diffCmd) // Computer differences between two files or folders.
registerCmd(rmCmd) // Remove a file or bucket
registerCmd(accessCmd) // Set access permissions.
registerCmd(sessionCmd) // Manage sessions for copy and mirror.
registerCmd(configCmd) // Configure minio client.
registerCmd(updateCmd) // Check for new software updates.
registerCmd(versionCmd) // Print version.
app := cli.NewApp()
app.Usage = "Minio Client for cloud storage and filesystems."
app.Commands = commands
app.Author = "Minio.io"
app.Flags = append(mcFlags, globalFlags...)
app.CustomAppHelpTemplate = mcHelpTemplate
app.CommandNotFound = commandNotFound // handler function declared above.
return app
}
func main() {
probe.Init() // Set project's root source path.
probe.SetAppInfo("Release-Tag", mcReleaseTag)
probe.SetAppInfo("Commit", mcShortCommitID)
contentdb.Init() // Load contentdb into memory.
app := registerApp()
app.Before = registerBefore
app.ExtraInfo = func() map[string]string {
if _, e := ts.GetSize(); e != nil {
globalQuiet = true
}
if globalDebug {
return getSystemData()
}
return make(map[string]string)
}
app.RunAndExitOnError()
}