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-rw-r--r--command.go124
1 files changed, 0 insertions, 124 deletions
diff --git a/command.go b/command.go
deleted file mode 100644
index 204c3be..0000000
--- a/command.go
+++ /dev/null
@@ -1,124 +0,0 @@
-package main
-
-// Handler to make management of subcommands easier.
-
-import (
- "flag"
- "fmt"
- "os"
-)
-
-type (
- Command struct {
- Use string // command name (used for matching)
- Short string // a short description to display
- Long string // a long help text
- Example string // an example string
- Run func(*Command, []string) // the command to run
-
- flagSet *flag.FlagSet // internal flagset with all flags
- commands []*Command // the list of subcommands
- }
-)
-
-// This function adds a new sub command.
-func (c *Command) AddCommand(cmds ...*Command) {
- res := c.commands
- for _, cmd := range cmds {
- res = append(res, cmd)
- }
- c.commands = res
-}
-
-// Evaluate the arguments and call either the subcommand or parse it as flags.
-func (c *Command) eval(args []string) error {
- var name string = ""
- var rest []string = []string{}
-
- if len(args) > 0 {
- name = args[0]
- }
- if len(args) > 1 {
- rest = args[1:]
- }
-
- if name == "help" {
- c.Help(rest)
- return nil
- }
-
- for _, cmd := range c.commands {
- if cmd.Use == name {
- return cmd.eval(rest)
- }
- }
- if err := c.Flags().Parse(args); err != nil {
- return err
- }
- if c.Run != nil {
- c.Run(c, rest)
- } else {
- c.Help(rest)
- }
- return nil
-}
-
-// Execute the command. It will fetch os.Args[1:] itself.
-func (c *Command) Execute() error {
- return c.eval(os.Args[1:])
-}
-
-// Return the flagset currently in use.
-func (c *Command) Flags() *flag.FlagSet {
- if c.flagSet == nil {
- c.flagSet = flag.NewFlagSet(c.Use, flag.ContinueOnError)
- }
- return c.flagSet
-}
-
-// Print the help for the current command or a subcommand.
-func (c *Command) Help(args []string) {
- if len(args) > 0 {
- for _, cmd := range c.commands {
- if args[0] == cmd.Use {
- cmd.Help([]string{})
- return
- }
- }
- }
- if c.Long != "" {
- fmt.Println(c.Long, "\n")
- }
- c.Usage()
-}
-
-// Print the usage information.
-func (c *Command) Usage() {
- usage := ""
- if c.Use != "" {
- usage = usage + " " + c.Use
- }
- if len(c.commands) > 0 {
- usage = usage + " command"
- }
- if c.flagSet != nil {
- usage = usage + " [flags]"
- }
- fmt.Printf("Usage: %s%s\n", os.Args[0], usage)
-
- if len(c.commands) > 0 {
- fmt.Printf("\nwhere command is one of:\n")
- for _, cmd := range c.commands {
- fmt.Printf("\t%s\t\t%s\n", cmd.Use, cmd.Short)
- }
- }
- if c.flagSet != nil {
- fmt.Printf("\nwhere flags is any of:\n")
- c.Flags().SetOutput(os.Stdout)
- c.Flags().PrintDefaults()
- }
- if c.Example != "" {
- fmt.Println("\nexample:")
- fmt.Printf("\t%s\n", c.Example)
- }
-}