forked from remind101/emp
/
main.go
258 lines (222 loc) · 5.25 KB
/
main.go
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package main
import (
"bufio"
"fmt"
"log"
"os"
"runtime"
"strings"
"github.com/remind101/emp/Godeps/_workspace/src/github.com/bgentry/heroku-go"
flag "github.com/remind101/emp/Godeps/_workspace/src/github.com/bgentry/pflag"
"github.com/remind101/emp/Godeps/_workspace/src/github.com/docker/docker/pkg/term"
"github.com/remind101/emp/Godeps/_workspace/src/github.com/mgutz/ansi"
"github.com/remind101/emp/hkclient"
)
var (
apiURL = "http://localhost:8080"
stdin = bufio.NewReader(os.Stdin)
inFd, outFd uintptr
isTerminalIn, isTerminalOut bool
)
type Command struct {
// args does not include the command name
Run func(cmd *Command, args []string)
Flag flag.FlagSet
NeedsApp bool
Usage string // first word is the command name
Category string // i.e. "App", "Account", etc.
Short string // `emp help` output
Long string // `emp help cmd` output
Alias string // Optional alias for the command.
}
func (c *Command) PrintUsage() {
if c.Runnable() {
fmt.Fprintf(os.Stderr, "Usage: emp %s\n", c.FullUsage())
}
fmt.Fprintf(os.Stderr, "Use 'emp help %s' for more information.\n", c.Name())
}
func (c *Command) PrintLongUsage() {
if c.Runnable() {
fmt.Printf("Usage: emp %s\n\n", c.FullUsage())
}
fmt.Println(strings.Trim(c.Long, "\n"))
}
func (c *Command) FullUsage() string {
if c.NeedsApp {
return c.Name() + " [-a <app or remote>]" + strings.TrimPrefix(c.Usage, c.Name())
}
return c.Usage
}
func (c *Command) Name() string {
name := c.Usage
i := strings.Index(name, " ")
if i >= 0 {
name = name[:i]
}
return name
}
func (c *Command) Runnable() bool {
return c.Run != nil
}
const extra = " (extra)"
func (c *Command) List() bool {
return c.Short != "" && !strings.HasSuffix(c.Short, extra)
}
func (c *Command) ListAsExtra() bool {
return c.Short != "" && strings.HasSuffix(c.Short, extra)
}
func (c *Command) ShortExtra() string {
return c.Short[:len(c.Short)-len(extra)]
}
// Running `emp help` will list commands in this order.
var commands = []*Command{
cmdCreate,
cmdApps,
cmdDynos,
cmdReleases,
cmdReleaseInfo,
cmdRollback,
cmdScale,
cmdRestart,
cmdEnvLoad,
cmdSet,
cmdUnset,
cmdEnv,
cmdRun,
cmdInfo,
cmdRename,
cmdDestroy,
cmdDomains,
cmdDomainAdd,
cmdDomainRemove,
cmdDeploy,
cmdVersion,
cmdHelp,
helpCommands,
helpEnviron,
helpMore,
helpAbout,
// listed by emp help more
cmdAPI,
cmdAuthorize,
cmdCreds,
cmdGet,
cmdLogin,
cmdLogout,
cmdSSL,
cmdSSLCertAdd,
cmdSSLCertRollback,
cmdSSLDestroy,
cmdURL,
cmdWhichApp,
}
var (
flagApp string
client *heroku.Client
hkAgent = "hk/" + Version + " (" + runtime.GOOS + "; " + runtime.GOARCH + ")"
userAgent = hkAgent + " " + heroku.DefaultUserAgent
)
func initClients() {
loadNetrc()
suite, err := hkclient.New(nrc, hkAgent)
if err != nil {
printFatal(err.Error())
}
client = suite.Client
apiURL = suite.ApiURL
}
func main() {
log.SetFlags(0)
// make sure command is specified, disallow global args
args := os.Args[1:]
if len(args) < 1 || strings.IndexRune(args[0], '-') == 0 {
printUsageTo(os.Stderr)
os.Exit(2)
}
inFd, isTerminalIn = term.GetFdInfo(os.Stdin)
outFd, isTerminalOut = term.GetFdInfo(os.Stdout)
if !isTerminalOut {
ansi.DisableColors(true)
}
initClients()
for _, cmd := range commands {
if matchesCommand(cmd, args[0]) && cmd.Run != nil {
defer recoverPanic()
cmd.Flag.SetDisableDuplicates(true) // disallow duplicate flag options
if !gitConfigBool("hk.strict-flag-ordering") {
cmd.Flag.SetInterspersed(true) // allow flags & non-flag args to mix
}
cmd.Flag.Usage = func() {
cmd.PrintUsage()
}
if cmd.NeedsApp {
cmd.Flag.StringVarP(&flagApp, "app", "a", "", "app name")
}
if err := cmd.Flag.Parse(args[1:]); err == flag.ErrHelp {
cmdHelp.Run(cmdHelp, args[:1])
return
} else if err != nil {
printError(err.Error())
os.Exit(2)
}
if flagApp != "" {
if gitRemoteApp, err := appFromGitRemote(flagApp); err == nil {
flagApp = gitRemoteApp
}
}
if cmd.NeedsApp {
a, err := app()
switch {
case err == errMultipleHerokuRemotes, err == nil && a == "":
msg := "no app specified"
if err != nil {
msg = err.Error()
}
printError(msg)
cmd.PrintUsage()
os.Exit(2)
case err != nil:
printFatal(err.Error())
}
}
cmd.Run(cmd, cmd.Flag.Args())
return
}
}
fmt.Fprintf(os.Stderr, "Unknown command: %s\n", args[0])
if g := suggest(args[0]); len(g) > 0 {
fmt.Fprintf(os.Stderr, "Possible alternatives: %v\n", strings.Join(g, " "))
}
fmt.Fprintf(os.Stderr, "Run 'emp help' for usage.\n")
os.Exit(2)
}
func recoverPanic() {
if Version != "dev" {
if rec := recover(); rec != nil {
printFatal("emp encountered and reported an internal client error")
}
}
}
func app() (string, error) {
if flagApp != "" {
return flagApp, nil
}
if app := os.Getenv("EMPAPP"); app != "" {
return app, nil
}
return appFromGitRemote(remoteFromGitConfig())
}
func mustApp() string {
name, err := app()
if err != nil {
printFatal(err.Error())
}
return name
}
// matchesCommand checks if the Command matches the command that we want to run.
func matchesCommand(cmd *Command, want string) bool {
if cmd.Alias != "" && cmd.Alias == want {
return true
}
return cmd.Name() == want
}