~dstroppa/juju-core/joyent-provider-storage : contents of cmd/juju/helptool.go at revision 1979

~dstroppa/juju-core/joyent-provider-storage : (revision 1979)

// Copyright 2013 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.

package main

import (
	"fmt"

	"launchpad.net/gnuflag"

	"launchpad.net/juju-core/charm"
	"launchpad.net/juju-core/cmd"
	"launchpad.net/juju-core/worker/uniter/jujuc"
)

// dummyHookContext implements jujuc.Context,
// as expected by jujuc.NewCommand.
type dummyHookContext struct{}

func (dummyHookContext) UnitName() string {
	return ""
}
func (dummyHookContext) PublicAddress() (string, bool) {
	return "", false
}
func (dummyHookContext) PrivateAddress() (string, bool) {
	return "", false
}
func (dummyHookContext) OpenPort(protocol string, port int) error {
	return nil
}
func (dummyHookContext) ClosePort(protocol string, port int) error {
	return nil
}
func (dummyHookContext) ConfigSettings() (charm.Settings, error) {
	return charm.NewConfig().DefaultSettings(), nil
}
func (dummyHookContext) HookRelation() (jujuc.ContextRelation, bool) {
	return nil, false
}
func (dummyHookContext) RemoteUnitName() (string, bool) {
	return "", false
}
func (dummyHookContext) Relation(id int) (jujuc.ContextRelation, bool) {
	return nil, false
}
func (dummyHookContext) RelationIds() []int {
	return []int{}
}

func (dummyHookContext) OwnerTag() string {
	return ""
}

type HelpToolCommand struct {
	cmd.CommandBase
	tool string
}

func (t *HelpToolCommand) Info() *cmd.Info {
	return &cmd.Info{
		Name:    "help-tool",
		Args:    "[tool]",
		Purpose: "show help on a juju charm tool",
	}
}

func (t *HelpToolCommand) Init(args []string) error {
	tool, err := cmd.ZeroOrOneArgs(args)
	if err == nil {
		t.tool = tool
	}
	return err
}

func (c *HelpToolCommand) Run(ctx *cmd.Context) error {
	var hookctx dummyHookContext
	if c.tool == "" {
		// Ripped from SuperCommand. We could Run() a SuperCommand
		// with "help commands", but then the implicit "help" command
		// shows up.
		names := jujuc.CommandNames()
		cmds := make([]cmd.Command, 0, len(names))
		longest := 0
		for _, name := range names {
			if c, err := jujuc.NewCommand(hookctx, name); err == nil {
				if len(name) > longest {
					longest = len(name)
				}
				cmds = append(cmds, c)
			}
		}
		for _, c := range cmds {
			info := c.Info()
			fmt.Fprintf(ctx.Stdout, "%-*s  %s\n", longest, info.Name, info.Purpose)
		}
	} else {
		c, err := jujuc.NewCommand(hookctx, c.tool)
		if err != nil {
			return err
		}
		info := c.Info()
		f := gnuflag.NewFlagSet(info.Name, gnuflag.ContinueOnError)
		c.SetFlags(f)
		ctx.Stdout.Write(info.Help(f))
	}
	return nil
}

1528.3.1 by Andrew Wilkins cmd/jujud: add help-tool subcommand	1	// Copyright 2013 Canonical Ltd.
	2	// Licensed under the AGPLv3, see LICENCE file for details.
	3
	4	package main
	5
	6	import (
	7	"fmt"
	8
	9	"launchpad.net/gnuflag"
	10
	11	"launchpad.net/juju-core/charm"
	12	"launchpad.net/juju-core/cmd"
	13	"launchpad.net/juju-core/worker/uniter/jujuc"
	14	)
	15
	16	// dummyHookContext implements jujuc.Context,
	17	// as expected by jujuc.NewCommand.
	18	type dummyHookContext struct{}
	19
1528.3.2 by Andrew Wilkins Move help-tool command to cmd/juju	20	func (dummyHookContext) UnitName() string {
1528.3.1 by Andrew Wilkins cmd/jujud: add help-tool subcommand	21	return ""
	22	}
1528.3.2 by Andrew Wilkins Move help-tool command to cmd/juju	23	func (dummyHookContext) PublicAddress() (string, bool) {
	24	return "", false
	25	}
	26	func (dummyHookContext) PrivateAddress() (string, bool) {
	27	return "", false
	28	}
	29	func (dummyHookContext) OpenPort(protocol string, port int) error {
	30	return nil
	31	}
	32	func (dummyHookContext) ClosePort(protocol string, port int) error {
	33	return nil
	34	}
	35	func (dummyHookContext) ConfigSettings() (charm.Settings, error) {
1528.3.1 by Andrew Wilkins cmd/jujud: add help-tool subcommand	36	return charm.NewConfig().DefaultSettings(), nil
	37	}
1528.3.2 by Andrew Wilkins Move help-tool command to cmd/juju	38	func (dummyHookContext) HookRelation() (jujuc.ContextRelation, bool) {
1528.3.1 by Andrew Wilkins cmd/jujud: add help-tool subcommand	39	return nil, false
	40	}
1528.3.2 by Andrew Wilkins Move help-tool command to cmd/juju	41	func (dummyHookContext) RemoteUnitName() (string, bool) {
1528.3.1 by Andrew Wilkins cmd/jujud: add help-tool subcommand	42	return "", false
	43	}
1528.3.2 by Andrew Wilkins Move help-tool command to cmd/juju	44	func (dummyHookContext) Relation(id int) (jujuc.ContextRelation, bool) {
1528.3.1 by Andrew Wilkins cmd/jujud: add help-tool subcommand	45	return nil, false
	46	}
1528.3.2 by Andrew Wilkins Move help-tool command to cmd/juju	47	func (dummyHookContext) RelationIds() []int {
1528.3.1 by Andrew Wilkins cmd/jujud: add help-tool subcommand	48	return []int{}
	49	}
	50
1914.2.12 by Matthew Williams the interface has changed, this didn't get picked up in the tests	51	func (dummyHookContext) OwnerTag() string {
	52	return ""
1914.2.3 by Matthew Williams get-owner takes a tag parameter and started work of getting data from the right place	53	}
	54
1528.3.1 by Andrew Wilkins cmd/jujud: add help-tool subcommand	55	type HelpToolCommand struct {
	56	cmd.CommandBase
	57	tool string
	58	}
	59
	60	func (t HelpToolCommand) Info() cmd.Info {
	61	return &cmd.Info{
	62	Name: "help-tool",
	63	Args: "[tool]",
	64	Purpose: "show help on a juju charm tool",
	65	}
	66	}
	67
	68	func (t *HelpToolCommand) Init(args []string) error {
	69	tool, err := cmd.ZeroOrOneArgs(args)
	70	if err == nil {
	71	t.tool = tool
	72	}
	73	return err
	74	}
	75
	76	func (c HelpToolCommand) Run(ctx cmd.Context) error {
	77	var hookctx dummyHookContext
	78	if c.tool == "" {
	79	// Ripped from SuperCommand. We could Run() a SuperCommand
	80	// with "help commands", but then the implicit "help" command
	81	// shows up.
	82	names := jujuc.CommandNames()
1528.3.2 by Andrew Wilkins Move help-tool command to cmd/juju	83	cmds := make([]cmd.Command, 0, len(names))
1528.3.1 by Andrew Wilkins cmd/jujud: add help-tool subcommand	84	longest := 0
1528.3.2 by Andrew Wilkins Move help-tool command to cmd/juju	85	for _, name := range names {
1528.3.1 by Andrew Wilkins cmd/jujud: add help-tool subcommand	86	if c, err := jujuc.NewCommand(hookctx, name); err == nil {
	87	if len(name) > longest {
	88	longest = len(name)
	89	}
1528.3.2 by Andrew Wilkins Move help-tool command to cmd/juju	90	cmds = append(cmds, c)
1528.3.1 by Andrew Wilkins cmd/jujud: add help-tool subcommand	91	}
	92	}
1528.3.2 by Andrew Wilkins Move help-tool command to cmd/juju	93	for _, c := range cmds {
	94	info := c.Info()
	95	fmt.Fprintf(ctx.Stdout, "%-*s %s\n", longest, info.Name, info.Purpose)
1528.3.1 by Andrew Wilkins cmd/jujud: add help-tool subcommand	96	}
	97	} else {
	98	c, err := jujuc.NewCommand(hookctx, c.tool)
	99	if err != nil {
	100	return err
	101	}
	102	info := c.Info()
	103	f := gnuflag.NewFlagSet(info.Name, gnuflag.ContinueOnError)
	104	c.SetFlags(f)
	105	ctx.Stdout.Write(info.Help(f))
	106	}
	107	return nil
	108	}