terraform/command/state_meta.go

142 lines
3.8 KiB
Go

package command
import (
"fmt"
"sort"
"time"
"github.com/hashicorp/terraform/addrs"
backendlocal "github.com/hashicorp/terraform/backend/local"
"github.com/hashicorp/terraform/state"
"github.com/hashicorp/terraform/states"
"github.com/hashicorp/terraform/states/statemgr"
)
// StateMeta is the meta struct that should be embedded in state subcommands.
type StateMeta struct {
Meta
}
// State returns the state for this meta. This gets the appropriate state from
// the backend, but changes the way that backups are done. This configures
// backups to be timestamped rather than just the original state path plus a
// backup path.
func (c *StateMeta) State() (state.State, error) {
var realState state.State
backupPath := c.backupPath
stateOutPath := c.statePath
// use the specified state
if c.statePath != "" {
realState = statemgr.NewFilesystem(c.statePath)
} else {
// Load the backend
b, backendDiags := c.Backend(nil)
if backendDiags.HasErrors() {
return nil, backendDiags.Err()
}
workspace := c.Workspace()
// Get the state
s, err := b.StateMgr(workspace)
if err != nil {
return nil, err
}
// Get a local backend
localRaw, backendDiags := c.Backend(&BackendOpts{ForceLocal: true})
if backendDiags.HasErrors() {
// This should never fail
panic(backendDiags.Err())
}
localB := localRaw.(*backendlocal.Local)
_, stateOutPath, _ = localB.StatePaths(workspace)
if err != nil {
return nil, err
}
realState = s
}
// We always backup state commands, so set the back if none was specified
// (the default is "-", but some tests bypass the flag parsing).
if backupPath == "-" || backupPath == "" {
// Determine the backup path. stateOutPath is set to the resulting
// file where state is written (cached in the case of remote state)
backupPath = fmt.Sprintf(
"%s.%d%s",
stateOutPath,
time.Now().UTC().Unix(),
DefaultBackupExtension)
}
// If the backend is local (which it should always be, given our asserting
// of it above) we can now enable backups for it.
if lb, ok := realState.(*statemgr.Filesystem); ok {
lb.SetBackupPath(backupPath)
}
return realState, nil
}
func (c *StateMeta) filter(state *states.State, args []string) ([]*states.FilterResult, error) {
var results []*states.FilterResult
filter := &states.Filter{State: state}
for _, arg := range args {
filtered, err := filter.Filter(arg)
if err != nil {
return nil, err
}
filtered:
for _, result := range filtered {
switch result.Address.(type) {
case addrs.ModuleInstance:
for _, result := range filtered {
if _, ok := result.Address.(addrs.ModuleInstance); ok {
results = append(results, result)
}
}
break filtered
case addrs.AbsResource:
for _, result := range filtered {
if _, ok := result.Address.(addrs.AbsResource); ok {
results = append(results, result)
}
}
break filtered
case addrs.AbsResourceInstance:
results = append(results, result)
}
}
}
// Sort the results
sort.Slice(results, func(i, j int) bool {
a, b := results[i], results[j]
// If the length is different, sort on the length so that the
// best match is the first result.
if len(a.Address.String()) != len(b.Address.String()) {
return len(a.Address.String()) < len(b.Address.String())
}
// If the addresses are different it is just lexographic sorting
if a.Address.String() != b.Address.String() {
return a.Address.String() < b.Address.String()
}
// Addresses are the same, which means it matters on the type
return a.SortedType() < b.SortedType()
})
return results, nil
}
const errStateMultiple = `Multiple instances found for the given pattern!
This command requires that the pattern match exactly one instance
of a resource. To view the matched instances, use "terraform state list".
Please modify the pattern to match only a single instance.`