initial helmfile impl

helmexec/exec.go

@@ -0,0 +1,79 @@
+package helmexec
+
+import (
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"strings"
+)
+
+const (
+	command = "helm"
+)
+
+type execer struct {
+	writer io.Writer
+	extra  []string
+}
+
+func NewHelmExec(writer io.Writer) Interface {
+	return &execer{writer: writer}
+}
+
+func (helm *execer) SetExtraArgs(args ...string) {
+	helm.extra = args
+}
+
+func (helm *execer) AddRepo(name, repository string) error {
+	out, err := helm.exec("repo", "add", name, repository)
+	if helm.writer != nil {
+		helm.writer.Write(out)
+	}
+	return err
+}
+
+func (helm *execer) UpdateRepo() error {
+	out, err := helm.exec("repo", "update")
+	if helm.writer != nil {
+		helm.writer.Write(out)
+	}
+	return err
+}
+
+func (helm *execer) SyncChart(name, chart string, flags ...string) error {
+	out, err := helm.exec(append([]string{"upgrade", "--install", name, chart}, flags...)...)
+	if helm.writer != nil {
+		helm.writer.Write(out)
+	}
+	return err
+}
+
+func (helm *execer) DeleteChart(name string) error {
+	out, err := helm.exec("delete", name)
+	if helm.writer != nil {
+		helm.writer.Write(out)
+	}
+	return err
+}
+
+func (helm *execer) exec(args ...string) ([]byte, error) {
+	dir, err := ioutil.TempDir("", "helmfile-exec")
+	if err != nil {
+		return nil, err
+	}
+	defer os.RemoveAll(dir)
+
+	cmdargs := args
+	if len(helm.extra) > 0 {
+		cmdargs = append(cmdargs, helm.extra...)
+	}
+	if helm.writer != nil {
+		helm.writer.Write([]byte(fmt.Sprintf("exec: helm %s\n", strings.Join(cmdargs, " "))))
+	}
+
+	cmd := exec.Command(command, args...)
+	cmd.Dir = dir
+	return cmd.CombinedOutput()
+}

helmexec/helmexec.go

@@ -0,0 +1,11 @@
+package helmexec
+
+type Interface interface {
+	SetExtraArgs(args ...string)
+
+	AddRepo(name, repository string) error
+	UpdateRepo() error
+
+	SyncChart(name, chart string, flags ...string) error
+	DeleteChart(name string) error
+}