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main.go
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main.go
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package main
import (
"fmt"
"io"
"log"
"os"
"os/signal"
"strings"
"syscall"
"github.com/roboll/helmfile/helmexec"
"github.com/roboll/helmfile/state"
"github.com/urfave/cli"
)
const (
DefaultHelmfile = "helmfile.yaml"
DeprecatedHelmfile = "charts.yaml"
)
var Version string
func main() {
app := cli.NewApp()
app.Name = "helmfile"
app.Usage = ""
app.Version = Version
app.Flags = []cli.Flag{
cli.StringFlag{
Name: "file, f",
Value: DefaultHelmfile,
Usage: "load config from `FILE`",
},
cli.BoolFlag{
Name: "quiet, q",
Usage: "silence output",
},
cli.StringFlag{
Name: "kube-context",
Usage: "Set kubectl context. Uses current context by default",
},
cli.StringFlag{
Name: "namespace, n",
Usage: "Set namespace. Uses the namespace set in the context by default",
},
cli.StringSliceFlag{
Name: "selector, l",
Usage: `Only run using the releases that match labels. Labels can take the form of foo=bar or foo!=bar.
A release must match all labels in a group in order to be used. Multiple groups can be specified at once.
--selector tier=frontend,tier!=proxy --selector tier=backend. Will match all frontend, non-proxy releases AND all backend releases.
The name of a release can be used as a label. --selector name=myrelease`,
},
}
app.Commands = []cli.Command{
{
Name: "repos",
Usage: "sync repositories from state file (helm repo add && helm repo update)",
Flags: []cli.Flag{
cli.StringFlag{
Name: "args",
Value: "",
Usage: "pass args to helm exec",
},
},
Action: func(c *cli.Context) error {
state, helm, err := before(c)
if err != nil {
return err
}
args := c.String("args")
if len(args) > 0 {
helm.SetExtraArgs(strings.Split(args, " ")...)
}
errs := state.SyncRepos(helm)
return clean(state, errs)
},
},
{
Name: "charts",
Usage: "sync charts from state file (helm upgrade --install)",
Flags: []cli.Flag{
cli.StringFlag{
Name: "args",
Value: "",
Usage: "pass args to helm exec",
},
cli.StringSliceFlag{
Name: "values",
Usage: "additional value files to be merged into the command",
},
cli.IntFlag{
Name: "concurrency",
Value: 0,
Usage: "maximum number of concurrent helm processes to run, 0 is unlimited",
},
},
Action: func(c *cli.Context) error {
state, helm, err := before(c)
if err != nil {
return err
}
args := c.String("args")
if len(args) > 0 {
helm.SetExtraArgs(strings.Split(args, " ")...)
}
values := c.StringSlice("values")
workers := c.Int("concurrency")
errs := state.SyncReleases(helm, values, workers)
return clean(state, errs)
},
},
{
Name: "diff",
Usage: "diff charts from state file against env (helm diff)",
Flags: []cli.Flag{
cli.StringFlag{
Name: "args",
Value: "",
Usage: "pass args to helm exec",
},
cli.StringSliceFlag{
Name: "values",
Usage: "additional value files to be merged into the command",
},
cli.BoolFlag{
Name: "sync-repos",
Usage: "enable a repo sync prior to diffing",
},
},
Action: func(c *cli.Context) error {
state, helm, err := before(c)
if err != nil {
return err
}
args := c.String("args")
if len(args) > 0 {
helm.SetExtraArgs(strings.Split(args, " ")...)
}
if c.Bool("sync-repos") {
if errs := state.SyncRepos(helm); errs != nil && len(errs) > 0 {
for _, err := range errs {
fmt.Printf("err: %s\n", err.Error())
}
os.Exit(1)
}
}
values := c.StringSlice("values")
errs := state.DiffReleases(helm, values)
return clean(state, errs)
},
},
{
Name: "sync",
Usage: "sync all resources from state file (repos, charts and local chart deps)",
Flags: []cli.Flag{
cli.StringSliceFlag{
Name: "values",
Usage: "additional value files to be merged into the command",
},
cli.IntFlag{
Name: "concurrency",
Value: 0,
Usage: "maximum number of concurrent helm processes to run, 0 is unlimited",
},
cli.StringFlag{
Name: "args",
Value: "",
Usage: "pass args to helm exec",
},
},
Action: func(c *cli.Context) error {
state, helm, err := before(c)
if err != nil {
return err
}
if errs := state.SyncRepos(helm); errs != nil && len(errs) > 0 {
for _, err := range errs {
fmt.Printf("err: %s\n", err.Error())
}
os.Exit(1)
}
if errs := state.UpdateDeps(helm); errs != nil && len(errs) > 0 {
for _, err := range errs {
fmt.Printf("err: %s\n", err.Error())
}
os.Exit(1)
}
args := c.String("args")
if len(args) > 0 {
helm.SetExtraArgs(strings.Split(args, " ")...)
}
values := c.StringSlice("values")
workers := c.Int("concurrency")
errs := state.SyncReleases(helm, values, workers)
return clean(state, errs)
},
},
{
Name: "delete",
Usage: "delete charts from state file (helm delete)",
Action: func(c *cli.Context) error {
state, helm, err := before(c)
if err != nil {
return err
}
errs := state.DeleteReleases(helm)
return clean(state, errs)
},
},
}
err := app.Run(os.Args)
if err != nil {
log.Printf("err: %s", err.Error())
os.Exit(1)
}
}
func before(c *cli.Context) (*state.HelmState, helmexec.Interface, error) {
file := c.GlobalString("file")
quiet := c.GlobalBool("quiet")
kubeContext := c.GlobalString("kube-context")
namespace := c.GlobalString("namespace")
labels := c.GlobalStringSlice("selector")
st, err := state.ReadFromFile(file)
if err != nil {
if strings.Contains(err.Error(), fmt.Sprintf("open %s:", DefaultHelmfile)) {
var fallbackErr error
st, fallbackErr = state.ReadFromFile(DeprecatedHelmfile)
if fallbackErr != nil {
return nil, nil, fmt.Errorf("failed to read %s and %s: %v", file, DeprecatedHelmfile, err)
}
log.Printf("warn: charts.yaml is loaded: charts.yaml is deprecated in favor of helmfile.yaml. See https://github.com/roboll/helmfile/issues/25 for more information")
} else {
return nil, nil, fmt.Errorf("failed to read %s: %v", file, err)
}
}
if st.Context != "" {
if kubeContext != "" {
log.Printf("err: Cannot use option --kube-context and set attribute context.")
os.Exit(1)
}
kubeContext = st.Context
}
if namespace != "" {
if st.Namespace != "" {
log.Printf("err: Cannot use option --namespace and set attribute namespace.")
os.Exit(1)
}
st.Namespace = namespace
}
if len(labels) > 0 {
err = st.FilterReleases(labels)
if err != nil {
log.Print(err)
os.Exit(1)
}
}
var writer io.Writer
if !quiet {
writer = os.Stdout
}
sigs := make(chan os.Signal, 1)
signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
go func() {
sig := <-sigs
errs := []error{fmt.Errorf("Received [%s] to shutdown ", sig)}
clean(st, errs)
}()
return st, helmexec.New(writer, kubeContext), nil
}
func clean(state *state.HelmState, errs []error) error {
if errs == nil {
errs = []error{}
}
cleanErrs := state.Clean()
if cleanErrs != nil {
errs = append(errs, cleanErrs...)
}
if errs != nil && len(errs) > 0 {
for _, err := range errs {
fmt.Printf("err: %s\n", err.Error())
}
os.Exit(1)
}
return nil
}