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package eclier
import (
"context"
"flag"
"os"
"github.com/olekukonko/tablewriter"
)
// Constants for built-in commands.
const (
BuiltinScriptPath = "<built-in>"
BuiltinAuthor = "<built-in>"
BuiltinVersion = "<built-in>"
)
type pluginCommand struct {
r *Router
fs *flag.FlagSet
dontShowBuiltin *bool
}
// Close is a no-op.
func (p *pluginCommand) Close() error { return nil }
// Init sets up the flags for this command.
func (p *pluginCommand) Init() {
p.fs = flag.NewFlagSet(p.Verb(), flag.ExitOnError)
p.dontShowBuiltin = p.fs.Bool("no-builtin", false, "if set, don't show built-in commands")
}
// ScriptPath returns the built-in script path.
func (p *pluginCommand) ScriptPath() string { return BuiltinScriptPath }
// Verb returns the command verb.
func (p *pluginCommand) Verb() string { return "plugins" }
// Help returns the command help
func (p *pluginCommand) Help() string {
return `plugin lists all of the loaded commands and their script paths.`
}
func (p *pluginCommand) Usage() string {
return ` -no-builtin
if set, don't show built-in commands`
}
func (p *pluginCommand) Author() string { return BuiltinAuthor }
func (p *pluginCommand) Version() string { return BuiltinVersion }
// Run executes the command.
func (p *pluginCommand) Run(ctx context.Context, arg []string) error {
p.fs.Parse(arg)
table := tablewriter.NewWriter(os.Stdout)
table.SetHeader([]string{"Verb", "Path"})
for _, c := range p.r.cmds {
if c.ScriptPath() == BuiltinScriptPath && *p.dontShowBuiltin {
continue
}
table.Append([]string{c.Verb(), c.ScriptPath()})
}
table.Render()
return nil
}
// NewBuiltinCommand makes it easier to write core commands for eclier.
func NewBuiltinCommand(verb, help, usage string, doer func(context.Context, []string) error) Command {
return &commandFunc{
verb: verb,
help: help,
usage: usage,
doer: doer,
}
}
// commandFunc is a simple alias for creating builtin commands.
type commandFunc struct {
verb string
help string
usage string
doer func(context.Context, []string) error
}
// Close deallocates resources set up by the initialization of the command.
func (c *commandFunc) Close() error { return nil }
// Init is a no-op.
func (c *commandFunc) Init() {}
// ScriptPath returns the built-in script path.
func (c *commandFunc) ScriptPath() string { return BuiltinScriptPath }
// Verb returns the command verb.
func (c *commandFunc) Verb() string { return c.verb }
// Help returns the command help.
func (c *commandFunc) Help() string { return c.help }
// Usage returns the command usage.
func (c *commandFunc) Usage() string { return c.usage }
// Author returns the built-in author.
func (c *commandFunc) Author() string { return BuiltinAuthor }
// Version returns the built-in version.
func (c *commandFunc) Version() string { return BuiltinVersion }
// Run runs the command handler.
func (c *commandFunc) Run(ctx context.Context, arg []string) error {
return c.doer(ctx, arg)
}
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