mirror of
https://github.com/cloudflare/cloudflared.git
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TUN-528: Move cloudflared into a separate repo
This commit is contained in:
Areg Harutyunyan
482
vendor/gopkg.in/urfave/cli.v2/app.go
generated
vendored
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482
vendor/gopkg.in/urfave/cli.v2/app.go
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@@ -0,0 +1,482 @@
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package cli
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import (
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"fmt"
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"io"
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"io/ioutil"
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"os"
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"path/filepath"
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"reflect"
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"sort"
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"time"
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)
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// App is the main structure of a cli application.
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type App struct {
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// The name of the program. Defaults to path.Base(os.Args[0])
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Name string
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// Full name of command for help, defaults to Name
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HelpName string
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// Description of the program.
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Usage string
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// Text to override the USAGE section of help
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UsageText string
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// Description of the program argument format.
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ArgsUsage string
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// Version of the program
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Version string
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// Description of the program
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Description string
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// List of commands to execute
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Commands []*Command
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// List of flags to parse
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Flags []Flag
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// Boolean to enable shell completion commands
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EnableShellCompletion bool
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// Boolean to hide built-in help command
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HideHelp bool
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// Boolean to hide built-in version flag and the VERSION section of help
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HideVersion bool
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// Categories contains the categorized commands and is populated on app startup
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Categories CommandCategories
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// An action to execute when the shell completion flag is set
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ShellComplete ShellCompleteFunc
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// An action to execute before any subcommands are run, but after the context is ready
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// If a non-nil error is returned, no subcommands are run
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Before BeforeFunc
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// An action to execute after any subcommands are run, but after the subcommand has finished
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// It is run even if Action() panics
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After AfterFunc
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// The action to execute when no subcommands are specified
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Action ActionFunc
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// Execute this function if the proper command cannot be found
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CommandNotFound CommandNotFoundFunc
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// Execute this function if an usage error occurs
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OnUsageError OnUsageErrorFunc
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// Compilation date
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Compiled time.Time
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// List of all authors who contributed
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Authors []*Author
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// Copyright of the binary if any
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Copyright string
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// Writer writer to write output to
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Writer io.Writer
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// ErrWriter writes error output
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ErrWriter io.Writer
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// Other custom info
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Metadata map[string]interface{}
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// Carries a function which returns app specific info.
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ExtraInfo func() map[string]string
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// CustomAppHelpTemplate the text template for app help topic.
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// cli.go uses text/template to render templates. You can
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// render custom help text by setting this variable.
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CustomAppHelpTemplate string
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didSetup bool
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}
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// Tries to find out when this binary was compiled.
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// Returns the current time if it fails to find it.
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func compileTime() time.Time {
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info, err := os.Stat(os.Args[0])
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if err != nil {
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return time.Now()
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}
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return info.ModTime()
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}
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// Setup runs initialization code to ensure all data structures are ready for
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// `Run` or inspection prior to `Run`. It is internally called by `Run`, but
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// will return early if setup has already happened.
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func (a *App) Setup() {
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if a.didSetup {
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return
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}
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a.didSetup = true
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if a.Name == "" {
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a.Name = filepath.Base(os.Args[0])
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}
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if a.HelpName == "" {
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a.HelpName = filepath.Base(os.Args[0])
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}
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if a.Usage == "" {
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a.Usage = "A new cli application"
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}
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if a.Version == "" {
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a.Version = "0.0.0"
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}
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if a.ShellComplete == nil {
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a.ShellComplete = DefaultAppComplete
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}
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if a.Action == nil {
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a.Action = helpCommand.Action
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}
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if a.Compiled == (time.Time{}) {
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a.Compiled = compileTime()
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}
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if a.Writer == nil {
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a.Writer = os.Stdout
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}
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newCmds := []*Command{}
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for _, c := range a.Commands {
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if c.HelpName == "" {
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c.HelpName = fmt.Sprintf("%s %s", a.HelpName, c.Name)
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}
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newCmds = append(newCmds, c)
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}
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a.Commands = newCmds
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if a.Command(helpCommand.Name) == nil && !a.HideHelp {
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a.appendCommand(helpCommand)
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if HelpFlag != nil {
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a.appendFlag(HelpFlag)
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}
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}
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if a.EnableShellCompletion {
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a.appendFlag(GenerateCompletionFlag)
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a.appendFlag(InitCompletionFlag)
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}
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if !a.HideVersion {
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a.appendFlag(VersionFlag)
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}
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a.Categories = newCommandCategories()
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for _, command := range a.Commands {
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a.Categories.AddCommand(command.Category, command)
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}
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sort.Sort(a.Categories.(*commandCategories))
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if a.Metadata == nil {
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a.Metadata = make(map[string]interface{})
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}
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if a.Writer == nil {
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a.Writer = os.Stdout
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}
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}
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// Run is the entry point to the cli app. Parses the arguments slice and routes
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// to the proper flag/args combination
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func (a *App) Run(arguments []string) (err error) {
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a.Setup()
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// handle the completion flag separately from the flagset since
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// completion could be attempted after a flag, but before its value was put
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// on the command line. this causes the flagset to interpret the completion
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// flag name as the value of the flag before it which is undesirable
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// note that we can only do this because the shell autocomplete function
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// always appends the completion flag at the end of the command
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shellComplete, arguments := checkShellCompleteFlag(a, arguments)
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// parse flags
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set, err := flagSet(a.Name, a.Flags)
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if err != nil {
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return err
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}
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set.SetOutput(ioutil.Discard)
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err = set.Parse(arguments[1:])
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nerr := normalizeFlags(a.Flags, set)
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context := NewContext(a, set, nil)
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if nerr != nil {
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fmt.Fprintln(a.Writer, nerr)
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ShowAppHelp(context)
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return nerr
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}
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context.shellComplete = shellComplete
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if checkCompletions(context) {
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return nil
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}
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if done, cerr := checkInitCompletion(context); done {
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if cerr != nil {
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err = cerr
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} else {
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return nil
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}
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}
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if err != nil {
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if a.OnUsageError != nil {
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err := a.OnUsageError(context, err, false)
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HandleExitCoder(err)
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return err
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}
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fmt.Fprintf(a.Writer, "%s %s\n\n", "Incorrect Usage.", err.Error())
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ShowAppHelp(context)
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return err
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}
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if !a.HideHelp && checkHelp(context) {
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ShowAppHelp(context)
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return nil
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}
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if !a.HideVersion && checkVersion(context) {
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ShowVersion(context)
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return nil
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}
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if a.After != nil {
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defer func() {
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if afterErr := a.After(context); afterErr != nil {
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if err != nil {
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err = newMultiError(err, afterErr)
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} else {
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err = afterErr
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}
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}
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}()
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}
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if a.Before != nil {
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beforeErr := a.Before(context)
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if beforeErr != nil {
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ShowAppHelp(context)
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HandleExitCoder(beforeErr)
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err = beforeErr
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return err
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}
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}
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args := context.Args()
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if args.Present() {
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name := args.First()
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c := a.Command(name)
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if c != nil {
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return c.Run(context)
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}
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}
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if a.Action == nil {
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a.Action = helpCommand.Action
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}
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// Run default Action
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err = a.Action(context)
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HandleExitCoder(err)
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return err
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}
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// RunAsSubcommand invokes the subcommand given the context, parses ctx.Args() to
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// generate command-specific flags
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func (a *App) RunAsSubcommand(ctx *Context) (err error) {
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a.Setup()
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// append help to commands
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if len(a.Commands) > 0 {
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if a.Command(helpCommand.Name) == nil && !a.HideHelp {
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a.appendCommand(helpCommand)
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if HelpFlag != nil {
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a.appendFlag(HelpFlag)
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}
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}
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}
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newCmds := []*Command{}
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for _, c := range a.Commands {
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if c.HelpName == "" {
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c.HelpName = fmt.Sprintf("%s %s", a.HelpName, c.Name)
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}
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newCmds = append(newCmds, c)
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}
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a.Commands = newCmds
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// append flags
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if a.EnableShellCompletion {
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a.appendFlag(GenerateCompletionFlag)
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}
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// parse flags
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set, err := flagSet(a.Name, a.Flags)
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if err != nil {
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return err
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}
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set.SetOutput(ioutil.Discard)
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err = set.Parse(ctx.Args().Tail())
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nerr := normalizeFlags(a.Flags, set)
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context := NewContext(a, set, ctx)
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if nerr != nil {
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fmt.Fprintln(a.Writer, nerr)
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fmt.Fprintln(a.Writer)
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if len(a.Commands) > 0 {
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ShowSubcommandHelp(context)
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} else {
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ShowCommandHelp(ctx, context.Args().First())
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}
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return nerr
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}
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if checkCompletions(context) {
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return nil
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}
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if err != nil {
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if a.OnUsageError != nil {
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err = a.OnUsageError(context, err, true)
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HandleExitCoder(err)
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return err
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}
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fmt.Fprintf(a.Writer, "%s %s\n\n", "Incorrect Usage.", err.Error())
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ShowSubcommandHelp(context)
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return err
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}
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if len(a.Commands) > 0 {
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if checkSubcommandHelp(context) {
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return nil
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}
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} else {
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if checkCommandHelp(ctx, context.Args().First()) {
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return nil
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}
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}
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if a.After != nil {
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defer func() {
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afterErr := a.After(context)
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if afterErr != nil {
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HandleExitCoder(err)
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if err != nil {
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err = newMultiError(err, afterErr)
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} else {
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err = afterErr
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}
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}
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}()
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}
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if a.Before != nil {
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beforeErr := a.Before(context)
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if beforeErr != nil {
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HandleExitCoder(beforeErr)
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err = beforeErr
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return err
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}
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}
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args := context.Args()
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if args.Present() {
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name := args.First()
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c := a.Command(name)
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if c != nil {
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return c.Run(context)
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}
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}
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// Run default Action
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err = a.Action(context)
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HandleExitCoder(err)
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return err
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}
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// Command returns the named command on App. Returns nil if the command does not exist
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func (a *App) Command(name string) *Command {
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for _, c := range a.Commands {
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if c.HasName(name) {
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return c
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}
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}
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return nil
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}
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// VisibleCategories returns a slice of categories and commands that are
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// Hidden=false
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func (a *App) VisibleCategories() []CommandCategory {
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ret := []CommandCategory{}
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for _, category := range a.Categories.Categories() {
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if visible := func() CommandCategory {
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if len(category.VisibleCommands()) > 0 {
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return category
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}
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return nil
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}(); visible != nil {
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ret = append(ret, visible)
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}
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}
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return ret
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}
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// VisibleCommands returns a slice of the Commands with Hidden=false
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func (a *App) VisibleCommands() []*Command {
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ret := []*Command{}
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for _, command := range a.Commands {
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if !command.Hidden {
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ret = append(ret, command)
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}
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}
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return ret
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}
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// VisibleFlags returns a slice of the Flags with Hidden=false
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func (a *App) VisibleFlags() []Flag {
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return visibleFlags(a.Flags)
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}
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func (a *App) hasFlag(flag Flag) bool {
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for _, f := range a.Flags {
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if reflect.DeepEqual(flag, f) {
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return true
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}
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}
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return false
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}
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func (a *App) errWriter() io.Writer {
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// When the app ErrWriter is nil use the package level one.
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if a.ErrWriter == nil {
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return ErrWriter
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}
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return a.ErrWriter
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}
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func (a *App) appendFlag(fl Flag) {
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if !hasFlag(a.Flags, fl) {
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a.Flags = append(a.Flags, fl)
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}
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}
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func (a *App) appendCommand(c *Command) {
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if !hasCommand(a.Commands, c) {
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a.Commands = append(a.Commands, c)
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}
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}
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// Author represents someone who has contributed to a cli project.
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type Author struct {
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Name string // The Authors name
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Email string // The Authors email
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}
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// String makes Author comply to the Stringer interface, to allow an easy print in the templating process
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func (a *Author) String() string {
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e := ""
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if a.Email != "" {
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e = " <" + a.Email + ">"
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}
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return fmt.Sprintf("%v%v", a.Name, e)
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}
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Block a user