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update go min version Update Vendors: * code.gitea.io/gitea-vet v0.2.0 -> v0.2.1 * code.gitea.io/sdk/gitea v0.13.0 -> v0.13.1 * github.com/AlecAivazis/survey v2.1.1 -> v2.2.2 * github.com/adrg/xdg v0.2.1 -> v0.2.2 * github.com/araddon/dateparse d820a6159ab1 -> 8aadafed4dc4 * github.com/go-git/go-git v5.1.0 -> v5.2.0 * github.com/muesli/termenv v0.7.2 -> v0.7.4 * github.com/stretchr/testify v1.5.1 -> v1.6.1 * github.com/urfave/cli v2.2.0 -> v2.3.0 Co-authored-by: 6543 <6543@obermui.de> Reviewed-on: https://gitea.com/gitea/tea/pulls/250 Reviewed-by: Andrew Thornton <art27@cantab.net> Reviewed-by: mrsdizzie <info@mrsdizzie.com> Co-Authored-By: 6543 <6543@noreply.gitea.io> Co-Committed-By: 6543 <6543@noreply.gitea.io>
541 lines
13 KiB
Go
541 lines
13 KiB
Go
package cli
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import (
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"context"
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"flag"
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"fmt"
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"io"
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"os"
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"path/filepath"
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"sort"
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"time"
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)
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var (
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changeLogURL = "https://github.com/urfave/cli/blob/master/docs/CHANGELOG.md"
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appActionDeprecationURL = fmt.Sprintf("%s#deprecated-cli-app-action-signature", changeLogURL)
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contactSysadmin = "This is an error in the application. Please contact the distributor of this application if this is not you."
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errInvalidActionType = NewExitError("ERROR invalid Action type. "+
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fmt.Sprintf("Must be `func(*Context`)` or `func(*Context) error). %s", contactSysadmin)+
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fmt.Sprintf("See %s", appActionDeprecationURL), 2)
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)
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// App is the main structure of a cli application. It is recommended that
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// an app be created with the cli.NewApp() function
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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 bash completion commands
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EnableBashCompletion bool
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// Boolean to hide built-in help command and help flag
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HideHelp bool
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// Boolean to hide built-in help command but keep help flag.
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// Ignored if HideHelp is true.
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HideHelpCommand 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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BashComplete BashCompleteFunc
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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 a 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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// Reader reader to write input to (useful for tests)
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Reader io.Reader
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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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// ExitErrHandler processes any error encountered while running an App before
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// it is returned to the caller. If no function is provided, HandleExitCoder
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// is used as the default behavior.
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ExitErrHandler ExitErrHandlerFunc
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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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// Boolean to enable short-option handling so user can combine several
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// single-character bool arguments into one
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// i.e. foobar -o -v -> foobar -ov
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UseShortOptionHandling bool
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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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// NewApp creates a new cli Application with some reasonable defaults for Name,
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// Usage, Version and Action.
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func NewApp() *App {
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return &App{
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Name: filepath.Base(os.Args[0]),
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HelpName: filepath.Base(os.Args[0]),
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Usage: "A new cli application",
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UsageText: "",
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BashComplete: DefaultAppComplete,
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Action: helpCommand.Action,
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Compiled: compileTime(),
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Reader: os.Stdin,
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Writer: os.Stdout,
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ErrWriter: os.Stderr,
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}
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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.HideVersion = true
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}
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if a.BashComplete == nil {
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a.BashComplete = 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.Reader == nil {
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a.Reader = os.Stdin
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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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if a.ErrWriter == nil {
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a.ErrWriter = os.Stderr
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}
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var newCommands []*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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newCommands = append(newCommands, c)
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}
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a.Commands = newCommands
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if a.Command(helpCommand.Name) == nil && !a.HideHelp {
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if !a.HideHelpCommand {
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a.appendCommand(helpCommand)
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}
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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.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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}
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func (a *App) newFlagSet() (*flag.FlagSet, error) {
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return flagSet(a.Name, a.Flags)
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}
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func (a *App) useShortOptionHandling() bool {
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return a.UseShortOptionHandling
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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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return a.RunContext(context.Background(), arguments)
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}
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// RunContext is like Run except it takes a Context that will be
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// passed to its commands and sub-commands. Through this, you can
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// propagate timeouts and cancellation requests
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func (a *App) RunContext(ctx context.Context, 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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set, err := a.newFlagSet()
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if err != nil {
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return err
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}
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err = parseIter(set, a, arguments[1:], shellComplete)
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nerr := normalizeFlags(a.Flags, set)
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context := NewContext(a, set, &Context{Context: ctx})
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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 err != nil {
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if a.OnUsageError != nil {
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err := a.OnUsageError(context, err, false)
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a.handleExitCoder(context, 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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cerr := checkRequiredFlags(a.Flags, context)
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if cerr != nil {
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_ = ShowAppHelp(context)
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return cerr
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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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a.handleExitCoder(context, 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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a.handleExitCoder(context, err)
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return err
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}
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// RunAndExitOnError calls .Run() and exits non-zero if an error was returned
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//
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// Deprecated: instead you should return an error that fulfills cli.ExitCoder
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// to cli.App.Run. This will cause the application to exit with the given eror
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// code in the cli.ExitCoder
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func (a *App) RunAndExitOnError() {
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if err := a.Run(os.Args); err != nil {
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_, _ = fmt.Fprintln(a.ErrWriter, err)
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OsExiter(1)
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}
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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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// Setup also handles HideHelp and HideHelpCommand
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a.Setup()
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var 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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set, err := a.newFlagSet()
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if err != nil {
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return err
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}
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err = parseIter(set, a, ctx.Args().Tail(), ctx.shellComplete)
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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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a.handleExitCoder(context, 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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cerr := checkRequiredFlags(a.Flags, context)
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if cerr != nil {
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_ = ShowSubcommandHelp(context)
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return cerr
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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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a.handleExitCoder(context, 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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a.handleExitCoder(context, 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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a.handleExitCoder(context, 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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var 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) 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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|
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func (a *App) handleExitCoder(context *Context, err error) {
|
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if a.ExitErrHandler != nil {
|
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a.ExitErrHandler(context, err)
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} else {
|
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HandleExitCoder(err)
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}
|
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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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|
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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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|
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return fmt.Sprintf("%v%v", a.Name, e)
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}
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|
|
// HandleAction attempts to figure out which Action signature was used. If
|
|
// it's an ActionFunc or a func with the legacy signature for Action, the func
|
|
// is run!
|
|
func HandleAction(action interface{}, context *Context) (err error) {
|
|
switch a := action.(type) {
|
|
case ActionFunc:
|
|
return a(context)
|
|
case func(*Context) error:
|
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return a(context)
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case func(*Context): // deprecated function signature
|
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a(context)
|
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return nil
|
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}
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|
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return errInvalidActionType
|
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}
|