99 lines
2.6 KiB
Go
99 lines
2.6 KiB
Go
/*
|
|
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
|
|
|
|
https://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 main
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
"io/ioutil"
|
|
"os"
|
|
"os/exec"
|
|
"path/filepath"
|
|
"strings"
|
|
|
|
"sigs.k8s.io/kustomize/kyaml/fn/framework"
|
|
"sigs.k8s.io/kustomize/kyaml/fn/framework/command"
|
|
"sigs.k8s.io/kustomize/kyaml/kio"
|
|
"sigs.k8s.io/kustomize/kyaml/yaml"
|
|
)
|
|
|
|
const (
|
|
clusterctl = "clusterctl"
|
|
clusterAPIConfig = "clusterctl.yaml"
|
|
|
|
dirPerm = 0755
|
|
filePerm = 0644
|
|
)
|
|
|
|
// ClusterctlOptions holds all necessary data to run clusterctl inside of KRM
|
|
type ClusterctlOptions struct {
|
|
CmdOptions []string `json:"cmd-options,omitempty"`
|
|
Config []byte `json:"config,omitempty"`
|
|
Components map[string][]byte `json:"components,omitempty"`
|
|
}
|
|
|
|
// Run prepares config, repo tree and executes clusterctl with appropriate options
|
|
func (c *ClusterctlOptions) Run([]*yaml.RNode) ([]*yaml.RNode, error) {
|
|
if err := c.buildRepoTree(); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if err := ioutil.WriteFile(clusterAPIConfig, c.Config, filePerm); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return nil, runCmd(clusterctl, c.CmdOptions)
|
|
}
|
|
|
|
func (c *ClusterctlOptions) buildRepoTree() error {
|
|
for f, component := range c.Components {
|
|
componentDir := filepath.Dir(f)
|
|
if _, err := os.Stat(componentDir); os.IsNotExist(err) {
|
|
if err := os.MkdirAll(componentDir, dirPerm); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
if err := ioutil.WriteFile(f, component, filePerm); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func runCmd(cmd string, opts []string) error {
|
|
printMsg("#%s %s\n", cmd, strings.Join(opts, " "))
|
|
c := exec.Command(cmd, opts...)
|
|
// allows to observe realtime output from script
|
|
w := io.Writer(os.Stderr)
|
|
c.Stdout = w
|
|
c.Stderr = w
|
|
return c.Run()
|
|
}
|
|
|
|
// printMsg is a convenient function to print output to stderr
|
|
func printMsg(format string, a ...interface{}) {
|
|
if _, err := fmt.Fprintf(os.Stderr, format, a...); err != nil {
|
|
}
|
|
}
|
|
|
|
func main() {
|
|
cfg := &ClusterctlOptions{}
|
|
if err := command.Build(framework.SimpleProcessor{Filter: kio.FilterFunc(cfg.Run), Config: cfg},
|
|
command.StandaloneDisabled, false).Execute(); err != nil {
|
|
printMsg("\n")
|
|
os.Exit(1)
|
|
}
|
|
}
|