238 lines
8.3 KiB
Go
238 lines
8.3 KiB
Go
package helm
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import (
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"fmt"
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"github.com/urfave/cli/v2"
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"io"
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"os"
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"regexp"
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"strings"
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)
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var (
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justNumbers = regexp.MustCompile(`^\d+$`)
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deprecatedVars = []string{"PURGE", "RECREATE_PODS", "TILLER_NS", "UPGRADE", "CANARY_IMAGE", "CLIENT_ONLY", "STABLE_REPO_URL"}
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)
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// The Config struct captures the `settings` and `environment` blocks in the application's drone
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// config. Configuration in drone's `settings` block arrives as uppercase env vars matching the
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// config key, prefixed with `PLUGIN_`. Config from the `environment` block is uppercased, but does
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// not have the `PLUGIN_` prefix.
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type Config struct {
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// Configuration for drone-helm itself
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Command string // Helm command to run
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DroneEvent string // Drone event that invoked this plugin.
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UpdateDependencies bool // Call `helm dependency update` before the main command
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AddRepos []string // Call `helm repo add` before the main command
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Debug bool // Generate debug output and pass --debug to all helm commands
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Values string // Argument to pass to --set in applicable helm commands
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StringValues string // Argument to pass to --set-string in applicable helm commands
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ValuesFiles []string // Arguments to pass to --values in applicable helm commands
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Namespace string // Kubernetes namespace for all helm commands
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KubeToken string // Kubernetes authentication token to put in .kube/config
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SkipTLSVerify bool // Put insecure-skip-tls-verify in .kube/config
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Certificate string // The Kubernetes cluster CA's self-signed certificate (must be base64-encoded)
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APIServer string // The Kubernetes cluster's API endpoint
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ServiceAccount string // Account to use for connecting to the Kubernetes cluster
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ChartVersion string // Specific chart version to use in `helm upgrade`
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DryRun bool // Pass --dry-run to applicable helm commands
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Wait bool // Pass --wait to applicable helm commands
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ReuseValues bool // Pass --reuse-values to `helm upgrade`
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KeepHistory bool // Pass --keep-history to `helm uninstall`
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Timeout string // Argument to pass to --timeout in applicable helm commands
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Chart string // Chart argument to use in applicable helm commands
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Release string // Release argument to use in applicable helm commands
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Force bool // Pass --force to applicable helm commands
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AtomicUpgrade bool // Pass --atomic to `helm upgrade`
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CleanupOnFail bool // Pass --cleanup-on-fail to `helm upgrade`
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LintStrictly bool // Pass --strict to `helm lint`
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Stdout io.Writer
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Stderr io.Writer
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}
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// NewConfig creates a Config and reads environment variables into it, accounting for several possible formats.
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func NewConfig(stdout, stderr io.Writer, argv ...string) (*Config, error) {
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cfg := Config{
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Stdout: stdout,
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Stderr: stderr,
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}
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// cli doesn't support Destination for string slices, so we'll use bare
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// strings as an intermediate value and split them on commas ourselves.
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var addRepos, valuesFiles string
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app := &cli.App{
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Name: "drone-helm3",
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Action: func(*cli.Context) error { return nil },
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Flags: []cli.Flag{
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&cli.StringFlag{
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Name: "mode",
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Destination: &cfg.Command,
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EnvVars: []string{"MODE", "PLUGIN_MODE", "HELM_COMMAND", "PLUGIN_HELM_COMMAND"},
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},
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&cli.StringFlag{
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Name: "drone-event",
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Destination: &cfg.DroneEvent,
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EnvVars: []string{"DRONE_BUILD_EVENT"},
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},
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&cli.BoolFlag{
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Name: "update-dependencies",
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Destination: &cfg.UpdateDependencies,
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EnvVars: []string{"UPDATE_DEPENDENCIES", "PLUGIN_UPDATE_DEPENDENCIES"},
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},
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&cli.StringFlag{
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Name: "add-repos",
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Destination: &addRepos,
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EnvVars: []string{"ADD_REPOS", "PLUGIN_ADD_REPOS", "HELM_REPOS", "PLUGIN_HELM_REPOS"},
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},
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&cli.BoolFlag{
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Name: "debug",
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Destination: &cfg.Debug,
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EnvVars: []string{"DEBUG", "PLUGIN_DEBUG"},
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},
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&cli.StringFlag{
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Name: "values",
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Destination: &cfg.Values,
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EnvVars: []string{"VALUES", "PLUGIN_VALUES"},
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},
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&cli.StringFlag{
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Name: "string-values",
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Destination: &cfg.StringValues,
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EnvVars: []string{"STRING_VALUES", "PLUGIN_STRING_VALUES"},
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},
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&cli.StringFlag{
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Name: "values-files",
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Destination: &valuesFiles,
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EnvVars: []string{"VALUES_FILES", "PLUGIN_VALUES_FILES"},
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},
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&cli.StringFlag{
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Name: "namespace",
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Destination: &cfg.Namespace,
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EnvVars: []string{"NAMESPACE", "PLUGIN_NAMESPACE"},
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},
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&cli.StringFlag{
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Name: "kube-token",
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Destination: &cfg.KubeToken,
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EnvVars: []string{"KUBE_TOKEN", "PLUGIN_KUBE_TOKEN", "KUBERNETES_TOKEN", "PLUGIN_KUBERNETES_TOKEN"},
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},
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&cli.BoolFlag{
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Name: "skip-tls-verify",
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Destination: &cfg.SkipTLSVerify,
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EnvVars: []string{"SKIP_TLS_VERIFY", "PLUGIN_SKIP_TLS_VERIFY"},
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},
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&cli.StringFlag{
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Name: "kube-certificate",
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Destination: &cfg.Certificate,
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EnvVars: []string{"KUBE_CERTIFICATE", "PLUGIN_KUBE_CERTIFICATE", "KUBERNETES_CERTIFICATE", "PLUGIN_KUBERNETES_CERTIFICATE"},
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},
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&cli.StringFlag{
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Name: "kube-api-server",
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Destination: &cfg.APIServer,
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EnvVars: []string{"KUBE_API_SERVER", "PLUGIN_KUBE_API_SERVER", "API_SERVER", "PLUGIN_API_SERVER"},
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},
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&cli.StringFlag{
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Name: "service-account",
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Destination: &cfg.ServiceAccount,
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EnvVars: []string{"KUBE_SERVICE_ACCOUNT", "PLUGIN_KUBE_SERVICE_ACCOUNT", "SERVICE_ACCOUNT", "PLUGIN_SERVICE_ACCOUNT"},
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},
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&cli.StringFlag{
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Name: "chart-version",
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Destination: &cfg.ChartVersion,
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EnvVars: []string{"CHART_VERSION", "PLUGIN_CHART_VERSION"},
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},
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&cli.BoolFlag{
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Name: "dry-run",
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Destination: &cfg.DryRun,
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EnvVars: []string{"DRY_RUN", "PLUGIN_DRY_RUN"},
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},
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&cli.BoolFlag{
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Name: "wait-for-upgrade",
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Destination: &cfg.Wait,
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EnvVars: []string{"WAIT_FOR_UPGRADE", "PLUGIN_WAIT_FOR_UPGRADE", "WAIT", "PLUGIN_WAIT"},
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},
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&cli.BoolFlag{
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Name: "reuse-values",
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Destination: &cfg.ReuseValues,
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EnvVars: []string{"REUSE_VALUES", "PLUGIN_REUSE_VALUES"},
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},
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&cli.BoolFlag{
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Name: "keep-history",
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Destination: &cfg.KeepHistory,
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EnvVars: []string{"KEEP_HISTORY", "PLUGIN_KEEP_HISTORY"},
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},
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&cli.StringFlag{
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Name: "timeout",
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Destination: &cfg.Timeout,
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EnvVars: []string{"TIMEOUT", "PLUGIN_TIMEOUT"},
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},
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&cli.StringFlag{
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Name: "chart",
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Destination: &cfg.Chart,
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EnvVars: []string{"CHART", "PLUGIN_CHART"},
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},
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&cli.StringFlag{
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Name: "release",
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Destination: &cfg.Release,
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EnvVars: []string{"RELEASE", "PLUGIN_RELEASE"},
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},
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&cli.BoolFlag{
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Name: "force-upgrade",
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Destination: &cfg.Force,
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EnvVars: []string{"FORCE_UPGRADE", "PLUGIN_FORCE_UPGRADE", "FORCE", "PLUGIN_FORCE"},
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},
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&cli.BoolFlag{
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Name: "atomic-upgrade",
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Destination: &cfg.AtomicUpgrade,
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EnvVars: []string{"ATOMIC_UPGRADE", "PLUGIN_ATOMIC_UPGRADE"},
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},
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&cli.BoolFlag{
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Name: "cleanup-failed-upgrade",
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Destination: &cfg.CleanupOnFail,
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EnvVars: []string{"CLEANUP_FAILED_UPGRADE", "PLUGIN_CLEANUP_FAILED_UPGRADE"},
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},
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&cli.BoolFlag{
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Name: "lint-strictly",
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Destination: &cfg.LintStrictly,
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EnvVars: []string{"LINT_STRICTLY", "PLUGIN_LINT_STRICTLY"},
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},
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},
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}
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if err := app.Run(argv); err != nil {
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return nil, err
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}
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if addRepos != "" {
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cfg.AddRepos = strings.Split(addRepos, ",")
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}
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if valuesFiles != "" {
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cfg.ValuesFiles = strings.Split(valuesFiles, ",")
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}
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if justNumbers.MatchString(cfg.Timeout) {
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cfg.Timeout = fmt.Sprintf("%ss", cfg.Timeout)
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}
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if cfg.Debug && cfg.Stderr != nil {
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cfg.logDebug()
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}
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cfg.deprecationWarn()
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return &cfg, nil
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}
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func (cfg Config) logDebug() {
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if cfg.KubeToken != "" {
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cfg.KubeToken = "(redacted)"
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}
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fmt.Fprintf(cfg.Stderr, "Generated config: %+v\n", cfg)
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}
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func (cfg *Config) deprecationWarn() {
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for _, varname := range deprecatedVars {
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_, barePresent := os.LookupEnv(varname)
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_, prefixedPresent := os.LookupEnv("PLUGIN_" + varname)
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if barePresent || prefixedPresent {
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fmt.Fprintf(cfg.Stderr, "Warning: ignoring deprecated '%s' setting\n", strings.ToLower(varname))
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}
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}
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}
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