// laodState is used to load the Terraform state. We give precedence
// to a remote state if enabled, and then check the normal state path.
func (m *Meta) loadState() (*terraform.State, error) {
// Check if we remote state is enabled
localCache, _, err := remote.ReadLocalState()
if err != nil {
return nil, fmt.Errorf("Error loading state: %s", err)
}
// Set the state if enabled
var state *terraform.State
if localCache != nil {
// Refresh the state
log.Printf("[INFO] Refreshing local state...")
changes, err := remote.RefreshState(localCache.Remote)
if err != nil {
return nil, fmt.Errorf("Failed to refresh state: %v", err)
}
switch changes {
case remote.StateChangeNoop:
case remote.StateChangeInit:
case remote.StateChangeLocalNewer:
case remote.StateChangeUpdateLocal:
// Reload the state since we've udpated
localCache, _, err = remote.ReadLocalState()
if err != nil {
return nil, fmt.Errorf("Error loading state: %s", err)
}
default:
return nil, fmt.Errorf("%s", changes)
}
state = localCache
m.useRemoteState = true
}
// Load up the state
if m.statePath != "" {
f, err := os.Open(m.statePath)
if err != nil && os.IsNotExist(err) {
// If the state file doesn't exist, it is okay, since it
// is probably a new infrastructure.
err = nil
} else if m.useRemoteState && err == nil {
err = fmt.Errorf("Remote state enabled, but state file '%s' also present.", m.statePath)
f.Close()
} else if err == nil {
state, err = terraform.ReadState(f)
f.Close()
}
if err != nil {
return nil, fmt.Errorf("Error loading state: %s", err)
}
}
return state, nil
}
func (c *PullCommand) Run(args []string) int {
args = c.Meta.process(args, false)
cmdFlags := flag.NewFlagSet("pull", flag.ContinueOnError)
cmdFlags.Usage = func() { c.Ui.Error(c.Help()) }
if err := cmdFlags.Parse(args); err != nil {
return 1
}
// Recover the local state if any
local, _, err := remote.ReadLocalState()
if err != nil {
c.Ui.Error(fmt.Sprintf("%s", err))
return 1
}
if local == nil || local.Remote == nil {
c.Ui.Error("Remote state not enabled!")
return 1
}
// Attempt the state refresh
change, err := remote.RefreshState(local.Remote)
if err != nil {
c.Ui.Error(fmt.Sprintf(
"Failed to refresh from remote state: %v", err))
return 1
}
// Use an error exit code if the update was not a success
if !change.SuccessfulPull() {
c.Ui.Error(fmt.Sprintf("%s", change))
return 1
} else {
c.Ui.Output(fmt.Sprintf("%s", change))
}
return 0
}
// disableRemoteState is used to disable remote state management,
// and move the state file into place.
func (c *RemoteCommand) disableRemoteState() int {
// Get the local state
local, _, err := remote.ReadLocalState()
if err != nil {
c.Ui.Error(fmt.Sprintf("Failed to read local state: %v", err))
return 1
}
// Ensure we have the latest state before disabling
if c.conf.pullOnDisable {
log.Printf("[INFO] Refreshing local state from remote server")
change, err := remote.RefreshState(local.Remote)
if err != nil {
c.Ui.Error(fmt.Sprintf(
"Failed to refresh from remote state: %v", err))
return 1
}
// Exit if we were unable to update
if !change.SuccessfulPull() {
c.Ui.Error(fmt.Sprintf("%s", change))
return 1
} else {
log.Printf("[INFO] %s", change)
}
// Reload the local state after the refresh
local, _, err = remote.ReadLocalState()
if err != nil {
c.Ui.Error(fmt.Sprintf("Failed to read local state: %v", err))
return 1
}
}
// Clear the remote management, and copy into place
local.Remote = nil
fh, err := os.Create(c.conf.statePath)
if err != nil {
c.Ui.Error(fmt.Sprintf("Failed to create state file '%s': %v",
c.conf.statePath, err))
return 1
}
defer fh.Close()
if err := terraform.WriteState(local, fh); err != nil {
c.Ui.Error(fmt.Sprintf("Failed to encode state file '%s': %v",
c.conf.statePath, err))
return 1
}
// Remove the old state file
path, err := remote.HiddenStatePath()
if err != nil {
c.Ui.Error(fmt.Sprintf("Failed to get local state path: %v", err))
return 1
}
if err := os.Remove(path); err != nil {
c.Ui.Error(fmt.Sprintf("Failed to remove the local state file: %v", err))
return 1
}
return 0
}