func main() {
app := cli.NewApp()
app.Name = "helm"
app.Usage = `The Kubernetes package manager
To begin working with Helm, run the 'helm update' command:
$ helm update
This will download all of the necessary data. Common actions from this point
include:
- helm help COMMAND: see help for a specific command
- helm search: search for charts
- helm fetch: make a local working copy of a chart
- helm install: upload the chart to Kubernetes
For more information on Helm, go to http://helm.sh.
ENVIRONMENT:
$HELM_HOME: Set an alternative location for Helm files. By default, these
are stored in ~/.helm
`
app.Version = version
app.EnableBashCompletion = true
app.Flags = []cli.Flag{
cli.StringFlag{
Name: "home",
Value: "$HOME/.helm",
Usage: "The location of your Helm files",
EnvVar: "HELM_HOME",
},
cli.BoolFlag{
Name: "debug",
Usage: "Enable verbose debugging output",
},
}
app.CommandNotFound = func(c *cli.Context, command string) {
if action.HasPlugin(command) {
action.Plugin(home(c), command, c.Args())
return
}
log.Err("No matching command '%s'", command)
cli.ShowAppHelp(c)
log.Die("")
}
app.Commands = []cli.Command{
{
Name: "update",
Aliases: []string{"up"},
Usage: "Get the latest version of all Charts from GitHub.",
Description: `This will synchronize the local repository with the upstream GitHub project.
The local cached copy is stored in '~/.helm/cache' or (if specified)
'$HELM_HOME/cache'.
The first time 'helm update' is run, the necessary directory structures are
created and then the Git repository is pulled in full.
Subsequent calls to 'helm update' will simply synchronize the local cache
with the remote.`,
ArgsUsage: "",
Action: func(c *cli.Context) {
if !c.Bool("no-version-check") {
action.CheckLatest(version)
}
action.Update(home(c))
},
Flags: []cli.Flag{
cli.BoolFlag{
Name: "no-version-check",
Usage: "Disable Helm's automatic check for newer versions of itself.",
},
},
},
{
Name: "fetch",
Usage: "Fetch a Chart to your working directory.",
Description: `Copy a chart from the Chart repository to a local workspace.
From this point, the copied chart may be safely modified to your needs.
If an optional 'chart-name' is specified, the chart will be copied to a directory
of that name. For example, 'helm fetch nginx www' will copy the the contents of
the 'nginx' chart into a directory named 'www' in your workspace.
`,
ArgsUsage: "[chart] [chart-name]",
Action: fetch,
Flags: []cli.Flag{
cli.StringFlag{
Name: "namespace, n",
Value: "default",
Usage: "The Kubernetes destination namespace.",
},
},
},
{
Name: "remove",
Aliases: []string{"rm"},
Usage: "Remove one or more Charts from your working directory.",
ArgsUsage: "[chart-name] [...]",
Action: remove,
Flags: []cli.Flag{
cli.BoolFlag{
Name: "force",
Usage: "Remove Chart from working directory and leave packages installed.",
},
},
},
{
Name: "install",
Usage: "Install a named package into Kubernetes.",
Description: `If the given 'chart-name' is present in your workspace, it
will be uploaded into Kubernetes. If no chart named 'chart-name' is found in
your workspace, Helm will look for a chart with that name, install it into the
workspace, and then immediately upload it to Kubernetes.
When multiple charts are specified, Helm will attempt to install all of them,
following the resolution process described above.
As a special case, if the flag --chart-path is specified, Helm will look for a
Chart.yaml file and manifests/ directory at that path, and will install that
chart if found. In this case, you may not specify multiple charts at once.
`,
ArgsUsage: "[chart-name...]",
Action: install,
Flags: []cli.Flag{
cli.StringFlag{
Name: "namespace, n",
Value: "",
Usage: "The Kubernetes destination namespace.",
},
cli.BoolFlag{
Name: "force, aye-aye",
Usage: "Perform install even if dependencies are unsatisfied.",
},
cli.BoolFlag{
Name: "dry-run",
Usage: "Fetch the chart, but only display the underlying kubectl commands.",
},
},
},
{
Name: "uninstall",
Usage: "Uninstall a named package from Kubernetes.",
Description: `For each supplied 'chart-name', this will connect to Kubernetes
and remove all of the manifests specified.
This will not alter the charts in your workspace.
`,
ArgsUsage: "[chart-name...]",
Action: func(c *cli.Context) {
minArgs(c, 1, "uninstall")
for _, chart := range c.Args() {
action.Uninstall(chart, home(c), c.String("namespace"), c.Bool("force"))
}
},
Flags: []cli.Flag{
cli.StringFlag{
Name: "namespace, n",
Value: "",
Usage: "The Kubernetes destination namespace.",
},
cli.BoolFlag{
Name: "force, aye-aye, y",
Usage: "Do not ask for confirmation.",
},
},
},
{
Name: "create",
Usage: "Create a chart in the local workspace.",
Description: `This will scaffold a new chart named 'chart-name' in your
local workdir. To edit the resulting chart, you may edit the files directly or
use the 'helm edit' command.
`,
ArgsUsage: "[chart-name]",
Action: func(c *cli.Context) {
minArgs(c, 1, "create")
action.Create(c.Args()[0], home(c))
},
},
{
Name: "edit",
Usage: "Edit a named chart in the local workspace.",
Description: `Existing charts in the workspace can be edited using this command.
'helm edit' will open all of the chart files in a single editor (as specified
by the $EDITOR environment variable).
`,
ArgsUsage: "[chart-name]",
Action: func(c *cli.Context) {
minArgs(c, 1, "edit")
action.Edit(c.Args()[0], home(c))
},
},
{
Name: "publish",
Usage: "Publish a named chart to the git checkout.",
Description: `This copies a chart from the workdir into the cache. Doing so
is the first stage of contributing a chart upstream.
`,
ArgsUsage: "[chart-name]",
Action: func(c *cli.Context) {
minArgs(c, 1, "publish")
action.Publish(c.Args()[0], home(c), c.Bool("force"))
},
Flags: []cli.Flag{
cli.BoolFlag{
Name: "force, f",
Usage: "Force publish over an existing chart.",
},
},
},
{
Name: "list",
Usage: "List all fetched packages.",
Description: `This prints all of the packages that are currently installed in
the workspace. Packages are printed by the local name.
`,
ArgsUsage: "",
Action: func(c *cli.Context) {
action.List(home(c))
},
},
{
Name: "search",
Usage: "Search for a package.",
Description: `This provides a simple interface for searching the chart cache
for charts matching a given pattern.
If no string is provided, or if the special string '*' is provided, this will
list all available charts.
`,
ArgsUsage: "[string]",
Action: search,
},
{
Name: "info",
Usage: "Print information about a Chart.",
ArgsUsage: "[string]",
Flags: []cli.Flag{
cli.StringFlag{
Name: "format",
Usage: "Print using a Go template",
},
},
Action: func(c *cli.Context) {
minArgs(c, 1, "info")
action.Info(c.Args()[0], home(c), c.String("format"))
},
},
{
Name: "target",
Usage: "Displays information about cluster.",
ArgsUsage: "",
Action: func(c *cli.Context) {
action.Target()
},
},
{
Name: "home",
Usage: "Displays the location of the Helm home.",
ArgsUsage: "",
Action: func(c *cli.Context) {
log.Msg(home(c))
},
},
{
Name: "repo",
Aliases: []string{"repository"},
Usage: "Work with other Chart repositories.",
Subcommands: []cli.Command{
{
Name: "add",
Usage: "Add a remote chart repository.",
ArgsUsage: "[name] [git url]",
Action: func(c *cli.Context) {
minArgs(c, 2, "add")
a := c.Args()
action.AddRepo(home(c), a[0], a[1])
},
},
{
Name: "list",
Usage: "List all remote chart repositories.",
Action: func(c *cli.Context) {
action.ListRepos(home(c))
},
},
{
Name: "remove",
Aliases: []string{"rm"},
Usage: "Remove a remote chart repository.",
ArgsUsage: "[name] [git url]",
Action: func(c *cli.Context) {
minArgs(c, 1, "remove")
action.DeleteRepo(home(c), c.Args()[0])
},
},
},
},
}
app.Before = func(c *cli.Context) error {
log.IsDebugging = c.Bool("debug")
return nil
}
app.Run(os.Args)
}
// promptConfirm prompts a user to confirm (or deny) something.
//
// True is returned iff the prompt is confirmed.
// Errors are reported to the log, and return false.
//
// Valid confirmations:
// y, yes, true, t, aye-aye
//
// Valid denials:
// n, no, f, false
//
// Any other prompt response will return false, and issue a warning to the
// user.
func promptConfirm(msg string) bool {
oldState, err := terminal.MakeRaw(0)
if err != nil {
log.Err("Could not get terminal: %s", err)
return false
}
defer terminal.Restore(0, oldState)
f := readerWriter(log.Stdin, log.Stdout)
t := terminal.NewTerminal(f, msg+" (y/N) ")
res, err := t.ReadLine()
if err != nil {
log.Err("Could not read line: %s", err)
return false
}
res = strings.ToLower(res)
switch res {
case "yes", "y", "true", "t", "aye-aye":
return true
case "no", "n", "false", "f":
return false
}
log.Warn("Did not understand answer %q, assuming No", res)
return false
}
// Remove removes a chart from the workdir.
//
// - chart is the source
// - homedir is the home directory for the user
// - force will remove installed charts from workspace
func Remove(chart, homedir string, force bool) {
chartPath := filepath.Join(homedir, WorkspaceChartPath, chart)
if _, err := os.Stat(chartPath); err != nil {
log.Die("Chart not found. %s", err)
}
var connectionFailure bool
// check if any chart manifests are installed
installed, err := checkManifests(chartPath)
if err != nil {
if strings.Contains(err.Error(), "unable to connect") {
connectionFailure = true
} else {
log.Die(err.Error())
}
}
if !force && connectionFailure {
log.Err("Could not determine if %s is installed. To remove the chart --force flag must be set.", chart)
} else if !force && len(installed) > 0 {
log.Err("Found %d installed manifests for %s. To remove a chart that has been installed the --force flag must be set.", len(installed), chart)
} else {
// remove local chart files
if err := os.RemoveAll(chartPath); err != nil {
log.Die("Could not remove chart. %s", err)
}
log.Info("All clear! You have successfully removed %s from your workspace.", chart)
}
}
// RepoName gets the name of the Git repo, or an empty string if none is found.
func RepoName(chartpath string) string {
wd, err := os.Getwd()
if err != nil {
log.Err("Could not get working directory: %s", err)
return ""
}
defer func() {
if err := os.Chdir(wd); err != nil {
log.Die("Unrecoverable error: %s", err)
}
}()
if err := os.Chdir(chartpath); err != nil {
log.Err("Could not find chartpath %s: %s", chartpath, err)
return ""
}
out, err := exec.Command("git", "config", "--get", "remote.origin.url").CombinedOutput()
if err != nil {
log.Err("Git failed to get the origin name: %s %s", err, string(out))
return ""
}
return strings.TrimSpace(string(out))
}
// Publish a chart from the workspace to the cache directory
//
// - chartName being published
// - homeDir is the helm home directory for the user
// - force publishing even if the chart directory already exists
func Publish(chartName, homeDir, repo string, force bool) {
if repo == "" {
repo = "charts"
}
if !mustConfig(homeDir).Repos.Exists(repo) {
log.Err("Repo %s does not exist", repo)
log.Info("Available repositories")
ListRepos(homeDir)
return
}
src := helm.WorkspaceChartDirectory(homeDir, chartName)
dst := helm.CacheDirectory(homeDir, repo, chartName)
if _, err := os.Stat(dst); err == nil {
if force != true {
log.Info("chart already exists, use -f to force")
return
}
}
if err := helm.CopyDir(src, dst); err != nil {
log.Die("failed to publish directory: %v", err)
}
}
// Valid returns true if every validation passes.
func (cv *ChartValidation) Valid() bool {
var valid bool = true
fmt.Printf("\nVerifying %s chart is a valid chart...\n", cv.ChartName())
cv.walk(func(v *Validation) bool {
v.path = cv.Path
vv := v.valid()
if !vv {
switch v.level {
case 2:
cv.ErrorCount = cv.ErrorCount + 1
msg := v.Message + " : " + strconv.FormatBool(vv)
log.Err(msg)
case 1:
cv.WarningCount = cv.WarningCount + 1
msg := v.Message + " : " + strconv.FormatBool(vv)
log.Warn(msg)
}
} else {
msg := v.Message + " : " + strconv.FormatBool(vv)
log.Info(msg)
}
valid = valid && vv
return valid
})
return valid
}
// Target displays information about the cluster
func Target(client kubectl.Runner) {
out, err := client.ClusterInfo()
if err != nil {
log.Err(err.Error())
}
log.Msg(string(out))
}
// NewIndex creats a new Index.
//
// NewIndex indexes all of the chart tables configured in the config.yaml file.
// For that reason, it may cause substantial overhead on a large set of repos.
func NewIndex(cfg *config.Configfile, cachedir string) *Index {
lines := map[string]string{}
charts := map[string]*chart.Chartfile{}
for _, table := range cfg.Repos.Tables {
def := cfg.Repos.Default == table.Name
base := filepath.Join(cachedir, table.Name, "*/")
dirs, err := filepath.Glob(base)
if err != nil {
log.Err("Failed to read table %s: %s", table.Name, err)
}
for _, dir := range dirs {
bname := filepath.Base(dir)
c, err := chart.LoadChartfile(filepath.Join(dir, "Chart.yaml"))
if err != nil {
// This is not a chart. Skip it.
continue
}
name := table.Name + "/" + c.Name
if def {
name = c.Name
}
line := c.Name + sep + table.Name + "/" + bname + sep + c.Description + sep + c.Details
lines[name] = strings.ToLower(line)
charts[name] = c
}
}
return &Index{lines: lines, charts: charts}
}
// Template renders a template to an output file.
func Template(out, in, data string) {
var dest io.Writer
if out != "" {
f, err := os.Create(out)
if err != nil {
log.Die("Failed to open %s: %s", out, err)
}
defer func() {
if err := f.Close(); err != nil {
log.Err("Error closing file: %s", err)
}
}()
dest = f
} else {
dest = log.Stdout
}
var vals interface{}
if data != "" {
var err error
vals, err = openValues(data)
if err != nil {
log.Die("Error opening value file: %s", err)
}
}
tpl, err := ioutil.ReadFile(in)
if err != nil {
log.Die("Failed to read template file: %s", err)
}
if err := renderTemplate(dest, string(tpl), vals); err != nil {
log.Die("Failed: %s", err)
}
}
func optRepoMatch(from, req *chart.Dependency) bool {
// If no repo is set, this is treated as a match.
if req.Repo == "" {
return true
}
// Some day we might want to do some git-fu to match different forms of the
// same Git repo.
a, err := canonicalRepo(req.Repo)
if err != nil {
log.Err("Could not parse %s: %s", req.Repo, err)
return false
}
b, err := canonicalRepo(from.Repo)
if err != nil {
log.Err("Could not parse %s: %s", from.Repo, err)
return false
}
return a == b
}
// minArgs checks to see if the right number of args are passed.
//
// If not, it prints an error and quits.
func minArgs(c *cli.Context, i int, name string) {
if len(c.Args()) < i {
m := "arguments"
if i == 1 {
m = "argument"
}
log.Err("Expected %d %s", i, m)
cli.ShowCommandHelp(c, name)
log.Die("")
}
}
// Search looks for packages with 'term' in their name.
func Search(term, homedir string, regexp bool) {
cfg := mustConfig(homedir)
cdir := helm.CacheDirectory(homedir)
i := search.NewIndex(cfg, cdir)
res, err := i.Search(term, 5, regexp)
if err != nil {
log.Die("Failed to search: %s", err)
}
if len(res) == 0 {
log.Err("No results found. Try using '--regexp'.")
return
}
search.SortScore(res)
for _, r := range res {
c, _ := i.Chart(r.Name)
log.Msg("%s - %s", r.Name, c.Description)
}
}
// Cli is the main entrypoint for the Helm CLI.
func Cli() *cli.App {
app := cli.NewApp()
app.Name = "helm"
app.Usage = globalUsage
app.Version = version
app.EnableBashCompletion = true
app.After = func(c *cli.Context) error {
if log.ErrorState {
return errors.New("Exiting with errors")
}
return nil
}
app.Flags = []cli.Flag{
cli.StringFlag{
Name: "home",
Value: "$HOME/.helm",
Usage: "The location of your Helm files",
EnvVar: "HELM_HOME",
},
cli.BoolFlag{
Name: "debug",
Usage: "Enable verbose debugging output",
},
}
app.Commands = []cli.Command{
createCmd,
doctorCmd,
editCmd,
fetchCmd,
homeCmd,
infoCmd,
installCmd,
lintCmd,
listCmd,
publishCmd,
removeCmd,
repositoryCmd,
searchCmd,
targetCmd,
uninstallCmd,
updateCmd,
generateCmd,
tplCmd,
}
app.CommandNotFound = func(c *cli.Context, command string) {
if action.HasPlugin(command) {
action.Plugin(home(c), command, c.Args())
return
}
log.Err("No matching command '%s'", command)
cli.ShowAppHelp(c)
log.Die("")
}
app.Before = func(c *cli.Context) error {
log.IsDebugging = c.Bool("debug")
return nil
}
return app
}
// Lint validates that a chart is well-formed
//
// - chartPath path to chart directory
func Lint(chartPath string) {
cv := new(validation.ChartValidation)
chartPresenceValidation := cv.AddError("Chart found at "+chartPath, func(path string, v *validation.Validation) bool {
stat, err := os.Stat(chartPath)
cv.Path = chartPath
return err == nil && stat.Mode().IsDir()
})
chartYamlPresenceValidation := chartPresenceValidation.AddError("Chart.yaml is present", func(path string, v *validation.Validation) bool {
stat, err := os.Stat(v.ChartYamlPath())
return err == nil && stat.Mode().IsRegular()
})
chartYamlValidation := chartYamlPresenceValidation.AddError("Chart.yaml is valid yaml", func(path string, v *validation.Validation) bool {
chartfile, err := v.Chartfile()
if err == nil {
cv.Chartfile = chartfile
}
return err == nil
})
chartYamlNameValidation := chartYamlValidation.AddError("Chart.yaml has a name field", func(path string, v *validation.Validation) bool {
return cv.Chartfile.Name != ""
})
chartYamlNameValidation.AddError("Name declared in Chart.yaml is the same as directory name.", func(path string, v *validation.Validation) bool {
return cv.Chartfile.Name == cv.ChartName()
})
chartYamlValidation.AddError("Chart.yaml has a version field", func(path string, v *validation.Validation) bool {
return cv.Chartfile.Version != ""
})
chartYamlValidation.AddWarning("Chart.yaml has a description field", func(path string, v *validation.Validation) bool {
return cv.Chartfile.Description != ""
})
chartYamlValidation.AddWarning("Chart.yaml has a maintainers field", func(path string, v *validation.Validation) bool {
return cv.Chartfile.Maintainers != nil
})
chartPresenceValidation.AddWarning("README.md is present and not empty", func(path string, v *validation.Validation) bool {
readmePath := filepath.Join(path, "README.md")
stat, err := os.Stat(readmePath)
return err == nil && stat.Mode().IsRegular() && stat.Size() > 0
})
manifestsValidation := chartPresenceValidation.AddError("Manifests directory is present", func(path string, v *validation.Validation) bool {
stat, err := os.Stat(v.ChartManifestsPath())
return err == nil && stat.Mode().IsDir()
})
manifestsParsingValidation := manifestsValidation.AddError("Manifests are valid yaml", func(path string, v *validation.Validation) bool {
manifests, err := manifest.ParseDir(cv.Path)
if err == nil {
cv.Manifests = manifests
}
return err == nil && cv.Manifests != nil
})
manifestsParsingValidation.AddWarning("Manifests have correct and valid metadata", func(path string, v *validation.Validation) bool {
success := true
validKinds := InstallOrder
for _, m := range cv.Manifests {
meta, _ := m.VersionedObject.Meta()
if meta.Name == "" || len(meta.Name) > MaxMetadataNameLength {
success = false
}
if match, _ := regexp.MatchString(`[a-z]([-a-z0-9]*[a-z0-9])?`, meta.Name); !match {
success = false
}
val, ok := meta.Labels["heritage"]
if !ok || (val != "helm") {
success = false
}
kind := meta.Kind
validManifestKind := false
for _, validKind := range validKinds {
if kind == validKind {
validManifestKind = true
}
}
if validManifestKind == false {
success = false
}
}
return success
})
if cv.Valid() {
log.Info("Chart [%s] has passed all necessary checks", cv.ChartName())
} else {
if cv.ErrorCount > 0 {
log.Err("Chart [%s] has failed some necessary checks. Check out the error and warning messages listed.", cv.ChartName())
} else {
log.Warn("Chart [%s] has passed all necessary checks but failed some checks as well. Proceed with caution. Check out the warnings listed.", cv.ChartName())
}
}
}
"strings"
"github.com/helm/helm/log"
"github.com/helm/helm/manifest"
)
// kubeGetter wraps the kubectl command, override in tests
type kubeGetter func(string) string
var kubeGet kubeGetter = func(m string) string {
log.Debug("Getting manifests from %s", m)
a := []string{"get", "-f", m}
out, err := exec.Command("kubectl", a...).CombinedOutput()
if err != nil {
log.Err("Could not get manifest. %s", err)
}
return string(out)
}
// Remove removes a chart from the workdir.
//
// - chart is the source
// - homedir is the home directory for the user
// - force will remove installed charts from workspace
func Remove(chart, homedir string, force bool) {
chartPath := filepath.Join(homedir, WorkspaceChartPath, chart)
if _, err := os.Stat(chartPath); err != nil {
log.Die("Chart not found. %s", err)
}