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show.go
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show.go
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// Copyright 2017 The kubecfg authors
//
//
// 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 clicmd
import (
"github.com/ksonnet/ksonnet/pkg/actions"
"github.com/pkg/errors"
"github.com/spf13/cobra"
"github.com/spf13/viper"
)
const (
flagFormat = "format"
showShortDesc = "Show expanded manifests for a specific environment."
)
const (
vShowComponent = "show-components"
vShowFormat = "show-format"
)
func init() {
RootCmd.AddCommand(showCmd)
bindJsonnetFlags(showCmd, "show")
showCmd.Flags().StringSliceP(flagComponent, shortComponent, nil, "Name of a specific component (multiple -c flags accepted, allows YAML, JSON, and Jsonnet)")
viper.BindPFlag(vShowComponent, showCmd.Flags().Lookup(flagComponent))
showCmd.Flags().StringP(flagFormat, shortFormat, "yaml", "Output format. Supported values are: json, yaml")
viper.BindPFlag(vShowFormat, showCmd.Flags().Lookup(flagFormat))
}
var showCmd = &cobra.Command{
Use: "show <env> [-c <component-filename>]",
Short: showShortDesc,
Long: `
Show expanded manifests (resource definitions) for a specific environment.
Jsonnet manifests, each defining a ksonnet component, are expanded into their
JSON or YAML equivalents (YAML is the default). Any parameters in these Jsonnet
manifests are resolved based on environment-specific values.
When NO component is specified (no ` + "`-c`" + ` flag), this command expands all of
the files in the ` + "`components/`" + ` directory into a list of resource definitions.
This is the YAML version of what gets deployed to your cluster with
` + "`ks apply <env-name>`" + `.
When a component IS specified via the ` + "`-c`" + ` flag, this command only expands the
manifest for that particular component.
### Related Commands
* ` + "`ks validate` " + `— ` + valShortDesc + `
* ` + "`ks apply` " + `— ` + applyShortDesc + `
### Syntax
`,
Example: `
# Show all of the components for the 'dev' environment, in YAML
# (In other words, expands all manifests in the components/ directory)
ks show dev
# Show a single component from the 'prod' environment, in JSON
ks show prod -c redis -o json
# Show multiple components from the 'dev' environment, in YAML
ks show dev -c redis -c nginx-server
`,
RunE: func(cmd *cobra.Command, args []string) error {
var envName string
if len(args) == 1 {
envName = args[0]
}
m := map[string]interface{}{
actions.OptionApp: ka,
actions.OptionComponentNames: viper.GetStringSlice(vShowComponent),
actions.OptionEnvName: envName,
actions.OptionFormat: viper.GetString(vShowFormat),
}
if err := extractJsonnetFlags("show"); err != nil {
return errors.Wrap(err, "handle jsonnet flags")
}
return runAction(actionShow, m)
},
}