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96 lines
2.2 KiB
Go
96 lines
2.2 KiB
Go
package commands
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import (
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"flag"
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"io"
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"os"
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"strings"
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"github.com/beego/bee/v2/logger/colors"
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"github.com/beego/bee/v2/utils"
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)
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// Command is the unit of execution
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type Command struct {
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// Run runs the command.
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// The args are the arguments after the command name.
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Run func(cmd *Command, args []string) int
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// PreRun performs an operation before running the command
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PreRun func(cmd *Command, args []string)
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// UsageLine is the one-line Usage message.
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// The first word in the line is taken to be the command name.
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UsageLine string
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// Short is the short description shown in the 'go help' output.
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Short string
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// Long is the long message shown in the 'go help <this-command>' output.
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Long string
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// Flag is a set of flags specific to this command.
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Flag flag.FlagSet
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// CustomFlags indicates that the command will do its own
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// flag parsing.
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CustomFlags bool
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// output out writer if set in SetOutput(w)
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output *io.Writer
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}
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var AvailableCommands = []*Command{}
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var cmdUsage = `Use {{printf "bee help %s" .Name | bold}} for more information.{{endline}}`
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// Name returns the command's name: the first word in the Usage line.
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func (c *Command) Name() string {
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name := c.UsageLine
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i := strings.Index(name, " ")
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if i >= 0 {
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name = name[:i]
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}
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return name
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}
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// SetOutput sets the destination for Usage and error messages.
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// If output is nil, os.Stderr is used.
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func (c *Command) SetOutput(output io.Writer) {
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c.output = &output
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}
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// Out returns the out writer of the current command.
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// If cmd.output is nil, os.Stderr is used.
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func (c *Command) Out() io.Writer {
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if c.output != nil {
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return *c.output
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}
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return colors.NewColorWriter(os.Stderr)
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}
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// Usage puts out the Usage for the command.
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func (c *Command) Usage() {
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utils.Tmpl(cmdUsage, c)
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os.Exit(2)
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}
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// Runnable reports whether the command can be run; otherwise
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// it is a documentation pseudo-command such as import path.
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func (c *Command) Runnable() bool {
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return c.Run != nil
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}
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func (c *Command) Options() map[string]string {
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options := make(map[string]string)
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c.Flag.VisitAll(func(f *flag.Flag) {
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defaultVal := f.DefValue
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if len(defaultVal) > 0 {
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options[f.Name+"="+defaultVal] = f.Usage
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} else {
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options[f.Name] = f.Usage
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}
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})
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return options
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}
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