/
phase.go
92 lines (82 loc) · 2.14 KB
/
phase.go
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// Copyright © 2019 Banzai Cloud
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package phases
import (
"io"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
)
// Runnable interface for making phased commands.
type Runnable interface {
Use() string
Short() string
RegisterFlags(flags *pflag.FlagSet)
Validate(cmd *cobra.Command) error
Run(out io.Writer) error
}
// NewCommand create new command.
func NewCommand(out io.Writer, r Runnable) *cobra.Command {
cmd := &cobra.Command{
Use: r.Use(),
Short: r.Short(),
RunE: func(cmd *cobra.Command, args []string) error {
if err := r.Validate(cmd); err != nil {
return err
}
return r.Run(out)
},
}
r.RegisterFlags(cmd.Flags())
return cmd
}
// RunEAllSubcommands runs all sub-commands for a given phase.
func RunEAllSubcommands(cmd *cobra.Command, args []string) error {
for _, c := range cmd.Commands() {
if c.HasParent() {
p := c.Parent()
c.Flags().VisitAll(func(flag *pflag.Flag) {
if f := p.Flag(flag.Name); f != nil {
*flag = *f
}
})
}
err := c.RunE(c, args)
if err != nil {
return err
}
}
return nil
}
// MakeRunnable makes command phase runnable.
func MakeRunnable(cmd *cobra.Command) {
visitedFlags := make(map[string]bool)
for _, c := range cmd.Commands() {
// local flags
c.Flags().VisitAll(func(flag *pflag.Flag) {
if visitedFlags[flag.Name] {
return
}
cmd.Flags().AddFlag(flag)
visitedFlags[flag.Name] = true
})
// persistent flags
c.PersistentFlags().VisitAll(func(flag *pflag.Flag) {
if visitedFlags[flag.Name] {
return
}
cmd.PersistentFlags().AddFlag(flag)
visitedFlags[flag.Name] = true
})
}
}