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commands.go
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commands.go
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package main
import (
"log"
"os"
"os/signal"
"github.com/hashicorp/terraform/command"
pluginDiscovery "github.com/hashicorp/terraform/plugin/discovery"
"github.com/hashicorp/terraform/svchost"
"github.com/hashicorp/terraform/svchost/auth"
"github.com/hashicorp/terraform/svchost/disco"
"github.com/mitchellh/cli"
)
// runningInAutomationEnvName gives the name of an environment variable that
// can be set to any non-empty value in order to suppress certain messages
// that assume that Terraform is being run from a command prompt.
const runningInAutomationEnvName = "TF_IN_AUTOMATION"
// Commands is the mapping of all the available Terraform commands.
var Commands map[string]cli.CommandFactory
var PlumbingCommands map[string]struct{}
// Ui is the cli.Ui used for communicating to the outside world.
var Ui cli.Ui
const (
ErrorPrefix = "e:"
OutputPrefix = "o:"
)
func initCommands(config *Config) {
var inAutomation bool
if v := os.Getenv(runningInAutomationEnvName); v != "" {
inAutomation = true
}
credsSrc := credentialsSource(config)
services := disco.NewDisco()
services.SetCredentialsSource(credsSrc)
for userHost, hostConfig := range config.Hosts {
host, err := svchost.ForComparison(userHost)
if err != nil {
// We expect the config was already validated by the time we get
// here, so we'll just ignore invalid hostnames.
continue
}
services.ForceHostServices(host, hostConfig.Services)
}
dataDir := os.Getenv("TF_DATA_DIR")
meta := command.Meta{
Color: true,
GlobalPluginDirs: globalPluginDirs(),
PluginOverrides: &PluginOverrides,
Ui: Ui,
Services: services,
Credentials: credsSrc,
RunningInAutomation: inAutomation,
PluginCacheDir: config.PluginCacheDir,
OverrideDataDir: dataDir,
ShutdownCh: makeShutdownCh(),
}
// The command list is included in the terraform -help
// output, which is in turn included in the docs at
// website/source/docs/commands/index.html.markdown; if you
// add, remove or reclassify commands then consider updating
// that to match.
PlumbingCommands = map[string]struct{}{
"state": struct{}{}, // includes all subcommands
"debug": struct{}{}, // includes all subcommands
"force-unlock": struct{}{},
}
Commands = map[string]cli.CommandFactory{
"apply": func() (cli.Command, error) {
return &command.ApplyCommand{
Meta: meta,
}, nil
},
"console": func() (cli.Command, error) {
return &command.ConsoleCommand{
Meta: meta,
}, nil
},
"destroy": func() (cli.Command, error) {
return &command.ApplyCommand{
Meta: meta,
Destroy: true,
}, nil
},
"env": func() (cli.Command, error) {
return &command.WorkspaceCommand{
Meta: meta,
LegacyName: true,
}, nil
},
"env list": func() (cli.Command, error) {
return &command.WorkspaceListCommand{
Meta: meta,
LegacyName: true,
}, nil
},
"env select": func() (cli.Command, error) {
return &command.WorkspaceSelectCommand{
Meta: meta,
LegacyName: true,
}, nil
},
"env new": func() (cli.Command, error) {
return &command.WorkspaceNewCommand{
Meta: meta,
LegacyName: true,
}, nil
},
"env delete": func() (cli.Command, error) {
return &command.WorkspaceDeleteCommand{
Meta: meta,
LegacyName: true,
}, nil
},
"fmt": func() (cli.Command, error) {
return &command.FmtCommand{
Meta: meta,
}, nil
},
"get": func() (cli.Command, error) {
return &command.GetCommand{
Meta: meta,
}, nil
},
"graph": func() (cli.Command, error) {
return &command.GraphCommand{
Meta: meta,
}, nil
},
"import": func() (cli.Command, error) {
return &command.ImportCommand{
Meta: meta,
}, nil
},
"init": func() (cli.Command, error) {
return &command.InitCommand{
Meta: meta,
}, nil
},
"internal-plugin": func() (cli.Command, error) {
return &command.InternalPluginCommand{
Meta: meta,
}, nil
},
"output": func() (cli.Command, error) {
return &command.OutputCommand{
Meta: meta,
}, nil
},
"plan": func() (cli.Command, error) {
return &command.PlanCommand{
Meta: meta,
}, nil
},
"providers": func() (cli.Command, error) {
return &command.ProvidersCommand{
Meta: meta,
}, nil
},
"push": func() (cli.Command, error) {
return &command.PushCommand{
Meta: meta,
}, nil
},
"refresh": func() (cli.Command, error) {
return &command.RefreshCommand{
Meta: meta,
}, nil
},
"show": func() (cli.Command, error) {
return &command.ShowCommand{
Meta: meta,
}, nil
},
"taint": func() (cli.Command, error) {
return &command.TaintCommand{
Meta: meta,
}, nil
},
"validate": func() (cli.Command, error) {
return &command.ValidateCommand{
Meta: meta,
}, nil
},
"version": func() (cli.Command, error) {
return &command.VersionCommand{
Meta: meta,
Revision: GitCommit,
Version: Version,
VersionPrerelease: VersionPrerelease,
CheckFunc: commandVersionCheck,
}, nil
},
"untaint": func() (cli.Command, error) {
return &command.UntaintCommand{
Meta: meta,
}, nil
},
"workspace": func() (cli.Command, error) {
return &command.WorkspaceCommand{
Meta: meta,
}, nil
},
"workspace list": func() (cli.Command, error) {
return &command.WorkspaceListCommand{
Meta: meta,
}, nil
},
"workspace select": func() (cli.Command, error) {
return &command.WorkspaceSelectCommand{
Meta: meta,
}, nil
},
"workspace show": func() (cli.Command, error) {
return &command.WorkspaceShowCommand{
Meta: meta,
}, nil
},
"workspace new": func() (cli.Command, error) {
return &command.WorkspaceNewCommand{
Meta: meta,
}, nil
},
"workspace delete": func() (cli.Command, error) {
return &command.WorkspaceDeleteCommand{
Meta: meta,
}, nil
},
//-----------------------------------------------------------
// Plumbing
//-----------------------------------------------------------
"debug": func() (cli.Command, error) {
return &command.DebugCommand{
Meta: meta,
}, nil
},
"debug json2dot": func() (cli.Command, error) {
return &command.DebugJSON2DotCommand{
Meta: meta,
}, nil
},
"force-unlock": func() (cli.Command, error) {
return &command.UnlockCommand{
Meta: meta,
}, nil
},
"state": func() (cli.Command, error) {
return &command.StateCommand{}, nil
},
"state list": func() (cli.Command, error) {
return &command.StateListCommand{
Meta: meta,
}, nil
},
"state rm": func() (cli.Command, error) {
return &command.StateRmCommand{
StateMeta: command.StateMeta{
Meta: meta,
},
}, nil
},
"state mv": func() (cli.Command, error) {
return &command.StateMvCommand{
StateMeta: command.StateMeta{
Meta: meta,
},
}, nil
},
"state pull": func() (cli.Command, error) {
return &command.StatePullCommand{
Meta: meta,
}, nil
},
"state push": func() (cli.Command, error) {
return &command.StatePushCommand{
Meta: meta,
}, nil
},
"state show": func() (cli.Command, error) {
return &command.StateShowCommand{
Meta: meta,
}, nil
},
}
}
// makeShutdownCh creates an interrupt listener and returns a channel.
// A message will be sent on the channel for every interrupt received.
func makeShutdownCh() <-chan struct{} {
resultCh := make(chan struct{})
signalCh := make(chan os.Signal, 4)
signal.Notify(signalCh, ignoreSignals...)
signal.Notify(signalCh, forwardSignals...)
go func() {
for {
<-signalCh
resultCh <- struct{}{}
}
}()
return resultCh
}
func credentialsSource(config *Config) auth.CredentialsSource {
creds := auth.NoCredentials
if len(config.Credentials) > 0 {
staticTable := map[svchost.Hostname]map[string]interface{}{}
for userHost, creds := range config.Credentials {
host, err := svchost.ForComparison(userHost)
if err != nil {
// We expect the config was already validated by the time we get
// here, so we'll just ignore invalid hostnames.
continue
}
staticTable[host] = creds
}
creds = auth.StaticCredentialsSource(staticTable)
}
for helperType, helperConfig := range config.CredentialsHelpers {
log.Printf("[DEBUG] Searching for credentials helper named %q", helperType)
available := pluginDiscovery.FindPlugins("credentials", globalPluginDirs())
available = available.WithName(helperType)
if available.Count() == 0 {
log.Printf("[ERROR] Unable to find credentials helper %q; ignoring", helperType)
break
}
selected := available.Newest()
helperSource := auth.HelperProgramCredentialsSource(selected.Path, helperConfig.Args...)
creds = auth.Credentials{
creds,
auth.CachingCredentialsSource(helperSource), // cached because external operation may be slow/expensive
}
// There should only be zero or one "credentials_helper" blocks. We
// assume that the config was validated earlier and so we don't check
// for extras here.
break
}
return creds
}