221 lines
6.5 KiB
Go
221 lines
6.5 KiB
Go
package command
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import (
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"flag"
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"os"
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"strings"
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"github.com/hashicorp/nomad/api"
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"github.com/mitchellh/cli"
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"github.com/mitchellh/colorstring"
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"github.com/posener/complete"
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"golang.org/x/crypto/ssh/terminal"
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)
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const (
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// Constants for CLI identifier length
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shortId = 8
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fullId = 36
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)
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// FlagSetFlags is an enum to define what flags are present in the
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// default FlagSet returned by Meta.FlagSet.
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type FlagSetFlags uint
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const (
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FlagSetNone FlagSetFlags = 0
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FlagSetClient FlagSetFlags = 1 << iota
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FlagSetDefault = FlagSetClient
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)
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// Meta contains the meta-options and functionality that nearly every
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// Nomad command inherits.
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type Meta struct {
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Ui cli.Ui
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// These are set by the command line flags.
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flagAddress string
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// Whether to not-colorize output
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noColor bool
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// The region to send API requests
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region string
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// namespace to send API requests
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namespace string
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// token is used for ACLs to access privileged information
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token string
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caCert string
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caPath string
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clientCert string
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clientKey string
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tlsServerName string
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insecure bool
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}
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// FlagSet returns a FlagSet with the common flags that every
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// command implements. The exact behavior of FlagSet can be configured
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// using the flags as the second parameter, for example to disable
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// server settings on the commands that don't talk to a server.
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func (m *Meta) FlagSet(n string, fs FlagSetFlags) *flag.FlagSet {
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f := flag.NewFlagSet(n, flag.ContinueOnError)
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// FlagSetClient is used to enable the settings for specifying
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// client connectivity options.
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if fs&FlagSetClient != 0 {
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f.StringVar(&m.flagAddress, "address", "", "")
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f.StringVar(&m.region, "region", "", "")
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f.StringVar(&m.namespace, "namespace", "", "")
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f.BoolVar(&m.noColor, "no-color", false, "")
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f.StringVar(&m.caCert, "ca-cert", "", "")
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f.StringVar(&m.caPath, "ca-path", "", "")
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f.StringVar(&m.clientCert, "client-cert", "", "")
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f.StringVar(&m.clientKey, "client-key", "", "")
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f.BoolVar(&m.insecure, "insecure", false, "")
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f.StringVar(&m.tlsServerName, "tls-server-name", "", "")
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f.BoolVar(&m.insecure, "tls-skip-verify", false, "")
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f.StringVar(&m.token, "token", "", "")
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}
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f.SetOutput(&uiErrorWriter{ui: m.Ui})
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return f
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}
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// AutocompleteFlags returns a set of flag completions for the given flag set.
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func (m *Meta) AutocompleteFlags(fs FlagSetFlags) complete.Flags {
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if fs&FlagSetClient == 0 {
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return nil
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}
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return complete.Flags{
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"-address": complete.PredictAnything,
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"-region": complete.PredictAnything,
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"-namespace": NamespacePredictor(m.Client, nil),
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"-no-color": complete.PredictNothing,
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"-ca-cert": complete.PredictFiles("*"),
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"-ca-path": complete.PredictDirs("*"),
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"-client-cert": complete.PredictFiles("*"),
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"-client-key": complete.PredictFiles("*"),
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"-insecure": complete.PredictNothing,
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"-tls-server-name": complete.PredictNothing,
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"-tls-skip-verify": complete.PredictNothing,
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"-token": complete.PredictAnything,
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}
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}
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// ApiClientFactory is the signature of a API client factory
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type ApiClientFactory func() (*api.Client, error)
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// Client is used to initialize and return a new API client using
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// the default command line arguments and env vars.
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func (m *Meta) Client() (*api.Client, error) {
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config := api.DefaultConfig()
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if m.flagAddress != "" {
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config.Address = m.flagAddress
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}
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if m.region != "" {
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config.Region = m.region
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}
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if m.namespace != "" {
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config.Namespace = m.namespace
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}
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// If we need custom TLS configuration, then set it
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if m.caCert != "" || m.caPath != "" || m.clientCert != "" || m.clientKey != "" || m.tlsServerName != "" || m.insecure {
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t := &api.TLSConfig{
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CACert: m.caCert,
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CAPath: m.caPath,
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ClientCert: m.clientCert,
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ClientKey: m.clientKey,
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TLSServerName: m.tlsServerName,
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Insecure: m.insecure,
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}
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config.TLSConfig = t
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}
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if m.token != "" {
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config.SecretID = m.token
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}
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return api.NewClient(config)
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}
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func (m *Meta) Colorize() *colorstring.Colorize {
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return &colorstring.Colorize{
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Colors: colorstring.DefaultColors,
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Disable: m.noColor || !terminal.IsTerminal(int(os.Stdout.Fd())),
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Reset: true,
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}
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}
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// generalOptionsUsage returns the help string for the global options.
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func generalOptionsUsage() string {
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helpText := `
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-address=<addr>
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The address of the Nomad server.
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Overrides the NOMAD_ADDR environment variable if set.
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Default = http://127.0.0.1:4646
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-region=<region>
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The region of the Nomad servers to forward commands to.
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Overrides the NOMAD_REGION environment variable if set.
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Defaults to the Agent's local region.
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-namespace=<namespace>
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The target namespace for queries and actions bound to a namespace.
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Overrides the NOMAD_NAMESPACE environment variable if set.
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Defaults to the "default" namespace.
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-no-color
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Disables colored command output. Alternatively, NOMAD_CLI_NO_COLOR may be
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set.
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-ca-cert=<path>
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Path to a PEM encoded CA cert file to use to verify the
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Nomad server SSL certificate. Overrides the NOMAD_CACERT
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environment variable if set.
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-ca-path=<path>
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Path to a directory of PEM encoded CA cert files to verify
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the Nomad server SSL certificate. If both -ca-cert and
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-ca-path are specified, -ca-cert is used. Overrides the
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NOMAD_CAPATH environment variable if set.
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-client-cert=<path>
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Path to a PEM encoded client certificate for TLS authentication
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to the Nomad server. Must also specify -client-key. Overrides
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the NOMAD_CLIENT_CERT environment variable if set.
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-client-key=<path>
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Path to an unencrypted PEM encoded private key matching the
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client certificate from -client-cert. Overrides the
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NOMAD_CLIENT_KEY environment variable if set.
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-tls-server-name=<value>
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The server name to use as the SNI host when connecting via
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TLS. Overrides the NOMAD_TLS_SERVER_NAME environment variable if set.
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-tls-skip-verify
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Do not verify TLS certificate. This is highly not recommended. Verification
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will also be skipped if NOMAD_SKIP_VERIFY is set.
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-token
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The SecretID of an ACL token to use to authenticate API requests with.
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Overrides the NOMAD_TOKEN environment variable if set.
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`
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return strings.TrimSpace(helpText)
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}
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// funcVar is a type of flag that accepts a function that is the string given
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// by the user.
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type funcVar func(s string) error
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func (f funcVar) Set(s string) error { return f(s) }
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func (f funcVar) String() string { return "" }
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func (f funcVar) IsBoolFlag() bool { return false }
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