/
apply.go
121 lines (92 loc) · 2.38 KB
/
apply.go
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package k8s
import (
"bytes"
"fmt"
"os/exec"
"strings"
"github.com/pkg/errors"
yaml "gopkg.in/yaml.v2"
)
func (p *Provider) Apply(namespace, name, version string, data []byte, labels string, timeout int32) error {
ldata, err := ApplyLabels(data, labels)
if err != nil {
return errors.WithStack(err)
}
return p.Atom.Apply(namespace, name, version, ldata, timeout)
}
func Apply(data []byte, args ...string) error {
ka := append([]string{"apply", "-f", "-"}, args...)
cmd := exec.Command("kubectl", ka...)
cmd.Stdin = bytes.NewReader(data)
out, err := cmd.CombinedOutput()
if err != nil {
return errors.WithStack(errors.New(strings.TrimSpace(string(out))))
}
return nil
}
func Delete(data []byte, args ...string) error {
ka := append([]string{"delete", "-f", "-"}, args...)
cmd := exec.Command("kubectl", ka...)
cmd.Stdin = bytes.NewReader(data)
_, err := cmd.CombinedOutput()
if err != nil {
return errors.WithStack(err)
}
return nil
}
func ApplyLabels(data []byte, labels string) ([]byte, error) {
ls := parseLabels(labels)
parts := bytes.Split(data, []byte("---\n"))
for i := range parts {
dp, err := applyLabels(parts[i], ls)
if err != nil {
return nil, errors.WithStack(err)
}
parts[i] = dp
}
return bytes.Join(parts, []byte("---\n")), nil
}
func applyLabels(data []byte, labels map[string]string) ([]byte, error) {
var v map[string]interface{}
if err := yaml.Unmarshal(data, &v); err != nil {
return nil, errors.WithStack(err)
}
if len(v) == 0 {
return data, nil
}
switch t := v["metadata"].(type) {
case nil:
v["metadata"] = map[string]interface{}{"labels": labels}
case map[interface{}]interface{}:
switch u := t["labels"].(type) {
case nil:
t["labels"] = labels
v["metadata"] = t
case map[interface{}]interface{}:
for k, v := range labels {
u[k] = v
}
t["labels"] = u
v["metadata"] = t
default:
return nil, errors.WithStack(fmt.Errorf("unknown labels type: %T", u))
}
default:
return nil, errors.WithStack(fmt.Errorf("unknown metadata type: %T", t))
}
pd, err := yaml.Marshal(v)
if err != nil {
return nil, errors.WithStack(err)
}
return pd, nil
}
func parseLabels(labels string) map[string]string {
ls := map[string]string{}
for _, part := range strings.Split(labels, ",") {
ps := strings.SplitN(strings.TrimSpace(part), "=", 2)
if len(ps) == 2 {
ls[ps[0]] = ps[1]
}
}
return ls
}