141 lines
3.5 KiB
Go
141 lines
3.5 KiB
Go
package google
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import (
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"fmt"
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"log"
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"strconv"
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"strings"
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"github.com/hashicorp/terraform/helper/hashcode"
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"github.com/hashicorp/terraform/terraform"
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)
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func resourceComputeInstanceMigrateState(
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v int, is *terraform.InstanceState, meta interface{}) (*terraform.InstanceState, error) {
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if is.Empty() {
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log.Println("[DEBUG] Empty InstanceState; nothing to migrate.")
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return is, nil
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}
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switch v {
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case 0:
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log.Println("[INFO] Found Compute Instance State v0; migrating to v1")
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is, err := migrateStateV0toV1(is)
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if err != nil {
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return is, err
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}
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fallthrough
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case 1:
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log.Println("[INFO] Found Compute Instance State v1; migrating to v2")
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is, err := migrateStateV1toV2(is)
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if err != nil {
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return is, err
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}
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return is, nil
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default:
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return is, fmt.Errorf("Unexpected schema version: %d", v)
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}
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}
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func migrateStateV0toV1(is *terraform.InstanceState) (*terraform.InstanceState, error) {
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log.Printf("[DEBUG] Attributes before migration: %#v", is.Attributes)
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// Delete old count
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delete(is.Attributes, "metadata.#")
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newMetadata := make(map[string]string)
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for k, v := range is.Attributes {
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if !strings.HasPrefix(k, "metadata.") {
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continue
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}
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// We have a key that looks like "metadata.*" and we know it's not
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// metadata.# because we deleted it above, so it must be metadata.<N>.<key>
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// from the List of Maps. Just need to convert it to a single Map by
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// ditching the '<N>' field.
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kParts := strings.SplitN(k, ".", 3)
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// Sanity check: all three parts should be there and <N> should be a number
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badFormat := false
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if len(kParts) != 3 {
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badFormat = true
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} else if _, err := strconv.Atoi(kParts[1]); err != nil {
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badFormat = true
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}
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if badFormat {
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return is, fmt.Errorf(
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"migration error: found metadata key in unexpected format: %s", k)
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}
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// Rejoin as "metadata.<key>"
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newK := strings.Join([]string{kParts[0], kParts[2]}, ".")
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newMetadata[newK] = v
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delete(is.Attributes, k)
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}
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for k, v := range newMetadata {
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is.Attributes[k] = v
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}
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log.Printf("[DEBUG] Attributes after migration: %#v", is.Attributes)
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return is, nil
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}
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func migrateStateV1toV2(is *terraform.InstanceState) (*terraform.InstanceState, error) {
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log.Printf("[DEBUG] Attributes before migration: %#v", is.Attributes)
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// Maps service account index to list of scopes for that sccount
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newScopesMap := make(map[string][]string)
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for k, v := range is.Attributes {
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if !strings.HasPrefix(k, "service_account.") {
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continue
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}
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if k == "service_account.#" {
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continue
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}
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if strings.HasSuffix(k, ".scopes.#") {
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continue
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}
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if strings.HasSuffix(k, ".email") {
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continue
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}
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// Key is now of the form service_account.%d.scopes.%d
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kParts := strings.Split(k, ".")
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// Sanity check: all three parts should be there and <N> should be a number
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badFormat := false
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if len(kParts) != 4 {
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badFormat = true
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} else if _, err := strconv.Atoi(kParts[1]); err != nil {
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badFormat = true
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}
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if badFormat {
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return is, fmt.Errorf(
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"migration error: found scope key in unexpected format: %s", k)
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}
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newScopesMap[kParts[1]] = append(newScopesMap[kParts[1]], v)
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delete(is.Attributes, k)
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}
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for service_acct_index, newScopes := range newScopesMap {
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for _, newScope := range newScopes {
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hash := hashcode.String(canonicalizeServiceScope(newScope))
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newKey := fmt.Sprintf("service_account.%s.scopes.%d", service_acct_index, hash)
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is.Attributes[newKey] = newScope
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}
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}
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log.Printf("[DEBUG] Attributes after migration: %#v", is.Attributes)
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return is, nil
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}
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