chore: safe type assersions

docs-v2/content/en/docs/references/api-v2/grpc.md

@@ -1229,6 +1229,7 @@ For Cancelled Error code, use range 800 to 850.<br>
 | CONFIG_UNKNOWN_TRANSFORMER | 1215 | The transformer is not allowed in skaffold-managed mode. |
 | CONFIG_MISSING_MANIFEST_FILE_ERR | 1216 | Manifest file not found |
 | CONFIG_REMOTE_REPO_CACHE_NOT_FOUND_ERR | 1217 | Remote config repository cache not found and sync disabled |
+| CONFIG_UPGRADE_ERR | 1218 | Skaffold config version mismatch |
 | INSPECT_UNKNOWN_ERR | 1301 | Catch-all `skaffold inspect` command error |
 | INSPECT_BUILD_ENV_ALREADY_EXISTS_ERR | 1302 | Trying to add new build environment that already exists |
 | INSPECT_BUILD_ENV_INCORRECT_TYPE_ERR | 1303 | Trying to modify build environment that doesn't exist |
@@ -1307,6 +1308,7 @@ Enum for Suggestion codes
 | CONFIG_ALLOWLIST_transformers | 709 | Only the allow listed transformers are acceptable in skaffold-managed mode. |
 | CONFIG_FIX_MISSING_MANIFEST_FILE | 710 | Check mising manifest file section of config and fix as needed. |
 | CONFIG_ENABLE_REMOTE_REPO_SYNC | 711 | Enable remote repo sync, or clone manually |
+| CONFIG_FIX_SKAFFOLD_CONFIG_VERSION | 712 | Upgrade skaffold config version to latest |
 | INSPECT_USE_MODIFY_OR_NEW_PROFILE | 800 | Create new build env in a profile instead, or use the 'modify' command |
 | INSPECT_USE_ADD_BUILD_ENV | 801 | Check profile selection, or use the 'add' command instead |
 | INSPECT_CHECK_INPUT_PROFILE | 802 | Check profile flag value |

docs-v2/content/en/docs/references/api/grpc.md

@@ -1084,6 +1084,7 @@ For Cancelled Error code, use range 800 to 850.<br>
 | CONFIG_UNKNOWN_TRANSFORMER | 1215 | The transformer is not allowed in skaffold-managed mode. |
 | CONFIG_MISSING_MANIFEST_FILE_ERR | 1216 | Manifest file not found |
 | CONFIG_REMOTE_REPO_CACHE_NOT_FOUND_ERR | 1217 | Remote config repository cache not found and sync disabled |
+| CONFIG_UPGRADE_ERR | 1218 | Skaffold config version mismatch |
 | INSPECT_UNKNOWN_ERR | 1301 | Catch-all `skaffold inspect` command error |
 | INSPECT_BUILD_ENV_ALREADY_EXISTS_ERR | 1302 | Trying to add new build environment that already exists |
 | INSPECT_BUILD_ENV_INCORRECT_TYPE_ERR | 1303 | Trying to modify build environment that doesn't exist |
@@ -1162,6 +1163,7 @@ Enum for Suggestion codes
 | CONFIG_ALLOWLIST_transformers | 709 | Only the allow listed transformers are acceptable in skaffold-managed mode. |
 | CONFIG_FIX_MISSING_MANIFEST_FILE | 710 | Check mising manifest file section of config and fix as needed. |
 | CONFIG_ENABLE_REMOTE_REPO_SYNC | 711 | Enable remote repo sync, or clone manually |
+| CONFIG_FIX_SKAFFOLD_CONFIG_VERSION | 712 | Upgrade skaffold config version to latest |
 | INSPECT_USE_MODIFY_OR_NEW_PROFILE | 800 | Create new build env in a profile instead, or use the 'modify' command |
 | INSPECT_USE_ADD_BUILD_ENV | 801 | Check profile selection, or use the 'add' command instead |
 | INSPECT_CHECK_INPUT_PROFILE | 802 | Check profile flag value |

docs/content/en/docs/references/api-v2/grpc.md

@@ -1229,6 +1229,7 @@ For Cancelled Error code, use range 800 to 850.<br>
 | CONFIG_UNKNOWN_TRANSFORMER | 1215 | The transformer is not allowed in skaffold-managed mode. |
 | CONFIG_MISSING_MANIFEST_FILE_ERR | 1216 | Manifest file not found |
 | CONFIG_REMOTE_REPO_CACHE_NOT_FOUND_ERR | 1217 | Remote config repository cache not found and sync disabled |
+| CONFIG_UPGRADE_ERR | 1218 | Skaffold config version mismatch |
 | INSPECT_UNKNOWN_ERR | 1301 | Catch-all `skaffold inspect` command error |
 | INSPECT_BUILD_ENV_ALREADY_EXISTS_ERR | 1302 | Trying to add new build environment that already exists |
 | INSPECT_BUILD_ENV_INCORRECT_TYPE_ERR | 1303 | Trying to modify build environment that doesn't exist |
@@ -1307,6 +1308,7 @@ Enum for Suggestion codes
 | CONFIG_ALLOWLIST_transformers | 709 | Only the allow listed transformers are acceptable in skaffold-managed mode. |
 | CONFIG_FIX_MISSING_MANIFEST_FILE | 710 | Check mising manifest file section of config and fix as needed. |
 | CONFIG_ENABLE_REMOTE_REPO_SYNC | 711 | Enable remote repo sync, or clone manually |
+| CONFIG_FIX_SKAFFOLD_CONFIG_VERSION | 712 | Upgrade skaffold config version to latest |
 | INSPECT_USE_MODIFY_OR_NEW_PROFILE | 800 | Create new build env in a profile instead, or use the 'modify' command |
 | INSPECT_USE_ADD_BUILD_ENV | 801 | Check profile selection, or use the 'add' command instead |
 | INSPECT_CHECK_INPUT_PROFILE | 802 | Check profile flag value |

docs/content/en/docs/references/api/grpc.md

@@ -1084,6 +1084,7 @@ For Cancelled Error code, use range 800 to 850.<br>
 | CONFIG_UNKNOWN_TRANSFORMER | 1215 | The transformer is not allowed in skaffold-managed mode. |
 | CONFIG_MISSING_MANIFEST_FILE_ERR | 1216 | Manifest file not found |
 | CONFIG_REMOTE_REPO_CACHE_NOT_FOUND_ERR | 1217 | Remote config repository cache not found and sync disabled |
+| CONFIG_UPGRADE_ERR | 1218 | Skaffold config version mismatch |
 | INSPECT_UNKNOWN_ERR | 1301 | Catch-all `skaffold inspect` command error |
 | INSPECT_BUILD_ENV_ALREADY_EXISTS_ERR | 1302 | Trying to add new build environment that already exists |
 | INSPECT_BUILD_ENV_INCORRECT_TYPE_ERR | 1303 | Trying to modify build environment that doesn't exist |
@@ -1162,6 +1163,7 @@ Enum for Suggestion codes
 | CONFIG_ALLOWLIST_transformers | 709 | Only the allow listed transformers are acceptable in skaffold-managed mode. |
 | CONFIG_FIX_MISSING_MANIFEST_FILE | 710 | Check mising manifest file section of config and fix as needed. |
 | CONFIG_ENABLE_REMOTE_REPO_SYNC | 711 | Enable remote repo sync, or clone manually |
+| CONFIG_FIX_SKAFFOLD_CONFIG_VERSION | 712 | Upgrade skaffold config version to latest |
 | INSPECT_USE_MODIFY_OR_NEW_PROFILE | 800 | Create new build env in a profile instead, or use the 'modify' command |
 | INSPECT_USE_ADD_BUILD_ENV | 801 | Check profile selection, or use the 'add' command instead |
 | INSPECT_CHECK_INPUT_PROFILE | 802 | Check profile flag value |

pkg/skaffold/parser/config.go

@@ -134,7 +134,11 @@ func getConfigs(ctx context.Context, cfgOpts configOpts, opts config.SkaffoldOpt
 	// add profiles to record and validate that config names are unique if specified
 	seen := make(map[string]bool)
 	for _, cfg := range parsed {
-		config := cfg.(*latest.SkaffoldConfig)
+		config, ok := cfg.(*latest.SkaffoldConfig)
+		if !ok {
+			return nil, nil, sErrors.SkaffoldConfigUpgradeErr(cfg.GetVersion(), latest.Version)
+		}
+
 		for _, profile := range config.Profiles {
 			if !stringslice.Contains(r.allProfiles, profile.Name) {
 				r.allProfiles = append(r.allProfiles, profile.Name)
@@ -153,7 +157,11 @@ func getConfigs(ctx context.Context, cfgOpts configOpts, opts config.SkaffoldOpt
 
 	var configs SkaffoldConfigSet
 	for i, cfg := range parsed {
-		config := cfg.(*latest.SkaffoldConfig)
+		config, ok := cfg.(*latest.SkaffoldConfig)
+		if !ok {
+			return nil, nil, sErrors.SkaffoldConfigUpgradeErr(cfg.GetVersion(), latest.Version)
+		}
+
 		processed, err := processEachConfig(ctx, config, cfgOpts, opts, r, i, fieldsOverrodeByProfile)
 		if err != nil {
 			return nil, nil, err

pkg/skaffold/schema/errors/errors.go

@@ -200,3 +200,19 @@ func ConfigUnknownAPIVersionErr(version string) error {
 			},
 		})
 }
+
+// SkaffoldConfigUpgradeErr specifies that skaffold config needs to be upgraded to the latest version.
+func SkaffoldConfigUpgradeErr(currentVersion, targetVersion string) error {
+	msg := fmt.Sprintf("skaffold cannot auto-upgrade the config from version %s to version %s", currentVersion, targetVersion)
+	return sErrors.NewError(fmt.Errorf(msg),
+		&proto.ActionableErr{
+			Message: msg,
+			ErrCode: proto.StatusCode_CONFIG_UPGRADE_ERR,
+			Suggestions: []*proto.Suggestion{
+				{
+					SuggestionCode: proto.SuggestionCode_CONFIG_FIX_SKAFFOLD_CONFIG_VERSION,
+					Action:         fmt.Sprintf("Upgrade skaffold config version to %s manually", targetVersion),
+				},
+			},
+		})
+}