tests for migration path ordering and errors

cmd/coldImport.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

cmd/compose.go

@@ -153,9 +153,9 @@ func prepConfig() {
 		if !mrOK || mr == "" {
 			log.Fatal(name, "transformer config is missing `rank` value")
 		}
-		rank, err := strconv.Atoi(mr)
+		rank, err := strconv.ParseUint(mr, 10, 64)
 		if err != nil {
-			log.Fatal(name, "migration `rank` can't be converted to an integer")
+			log.Fatal(name, "migration `rank` can't be converted to an unsigned integer")
 		}
 		t, tOK := transformer["type"]
 		if !tOK {

cmd/lightSync.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

cmd/omniWatcher.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

cmd/root.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

cmd/sync.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

integration_test/block_rewards_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

integration_test/contract_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

integration_test/geth_blockchain_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

integration_test/integration_test_suite_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/chunker/chunker_suite_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/chunker/log_chunker.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/chunker/log_chunker_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/constants/checked_headers.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/constants/data.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/factories/converter.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/factories/factories_suite_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/factories/log_note_converter.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/factories/log_note_transformer.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/factories/log_note_transformer_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/factories/repository.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/factories/storage/storage_suite_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/factories/storage/transformer.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/factories/storage/transformer_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/factories/transformer.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/factories/transformer_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/fetcher/fetcher_suite_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/fetcher/log_fetcher.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/fetcher/log_fetcher_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/mocks/converter.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/mocks/log_note_converter.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/mocks/mappings.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/mocks/mock_watcher_repository.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/mocks/repository.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/mocks/storage_queue.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/mocks/storage_repository.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/mocks/storage_transformer.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/mocks/transformer.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/repository/repository.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/repository/repository_suite_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/repository/repository_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/repository/storage_repository.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/storage/mappings.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/storage/storage_queue.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/storage/storage_suite_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/storage/utils/decoder.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/storage/utils/decoder_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/storage/utils/errors.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/storage/utils/row.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/storage/utils/row_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/storage/utils/utils_suite_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/storage/utils/value.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/test_data/generic.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/transformer/event_transformer.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/transformer/storage_transformer.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/watcher/event_watcher.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/watcher/event_watcher_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/watcher/storage_watcher.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/watcher/storage_watcher_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

libraries/shared/watcher/watcher_suite_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/config/client.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/config/config.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/config/config_suite_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/config/config_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/config/database.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/config/plugin.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by
@@ -37,7 +37,7 @@ type Transformer struct {
 	Path           string
 	Type           TransformerType
 	MigrationPath  string
-	MigrationRank  int
+	MigrationRank  uint64
 	RepositoryPath string
 }
 
@@ -56,7 +56,8 @@ func (c *Plugin) GetPluginPaths() (string, string, error) {
 
 // Removes duplicate migration paths and returns them in ranked order
 func (c *Plugin) GetMigrationsPaths() ([]string, error) {
-	paths := make(map[int]string)
+	paths := make(map[uint64]string)
+	highestRank := -1
 	for name, transformer := range c.Transformers {
 		repo := transformer.RepositoryPath
 		mig := transformer.MigrationPath
@@ -74,6 +75,16 @@ func (c *Plugin) GetMigrationsPaths() ([]string, error) {
 			}
 		}
 		paths[transformer.MigrationRank] = cleanPath
+		if int(transformer.MigrationRank) >= highestRank {
+			highestRank = int(transformer.MigrationRank)
+		}
+	}
+	// Check for gaps and duplicates
+	if len(paths) != (highestRank + 1) {
+		return []string{}, errors.New("number of distinct ranks does not match number of distinct migration paths")
+	}
+	if anyDupes(paths) {
+		return []string{}, errors.New("duplicate paths with different ranks present")
 	}
 
 	sortedPaths := make([]string, len(paths))
@@ -130,3 +141,24 @@ func GetTransformerType(str string) TransformerType {
 
 	return UnknownTransformerType
 }
+
+func anyDupes(list map[uint64]string) bool {
+	seen := make([]string, 0, len(list))
+	for _, str := range list {
+		dupe := inList(str, seen)
+		if dupe {
+			return true
+		}
+		seen = append(seen, str)
+	}
+	return false
+}
+
+func inList(str string, list []string) bool {
+	for _, element := range list {
+		if str == element {
+			return true
+		}
+	}
+	return false
+}

pkg/config/plugin_test.go

@@ -0,0 +1,241 @@
+// VulcanizeDB
+// Copyright © 2019 Vulcanize
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package config_test
+
+import (
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+	"github.com/vulcanize/vulcanizedb/pkg/config"
+	"os"
+	"path/filepath"
+)
+
+var allDifferentPathsConfig = config.Plugin{
+	Transformers: map[string]config.Transformer{
+		"transformer1": {
+			Path:           "test/init/path",
+			Type:           config.EthEvent,
+			MigrationPath:  "test/migration/path1",
+			MigrationRank:  0,
+			RepositoryPath: "test/repo/path",
+		},
+		"transformer2": {
+			Path:           "test/init/path",
+			Type:           config.EthEvent,
+			MigrationPath:  "test/migration/path2",
+			MigrationRank:  2,
+			RepositoryPath: "test/repo/path",
+		},
+		"transformer3": {
+			Path:           "test/init/path2",
+			Type:           config.EthEvent,
+			MigrationPath:  "test/migration/path3",
+			MigrationRank:  1,
+			RepositoryPath: "test/repo/path",
+		},
+	},
+}
+
+var overlappingPathsConfig = config.Plugin{
+	Transformers: map[string]config.Transformer{
+		"transformer1": {
+			Path:           "test/init/path",
+			Type:           config.EthEvent,
+			MigrationPath:  "test/migration/path1",
+			MigrationRank:  0,
+			RepositoryPath: "test/repo/path",
+		},
+		"transformer2": {
+			Path:           "test/init/path",
+			Type:           config.EthEvent,
+			MigrationPath:  "test/migration/path1",
+			MigrationRank:  0,
+			RepositoryPath: "test/repo/path",
+		},
+		"transformer3": {
+			Path:           "test/init/path2",
+			Type:           config.EthEvent,
+			MigrationPath:  "test/migration/path3",
+			MigrationRank:  1,
+			RepositoryPath: "test/repo/path",
+		},
+	},
+}
+
+var conflictErrorConfig = config.Plugin{
+	Transformers: map[string]config.Transformer{
+		"transformer1": {
+			Path:           "test/init/path",
+			Type:           config.EthEvent,
+			MigrationPath:  "test/migration/path1",
+			MigrationRank:  0,
+			RepositoryPath: "test/repo/path",
+		},
+		"transformer2": {
+			Path:           "test/init/path",
+			Type:           config.EthEvent,
+			MigrationPath:  "test/migration/path2",
+			MigrationRank:  0,
+			RepositoryPath: "test/repo/path",
+		},
+		"transformer3": {
+			Path:           "test/init/path2",
+			Type:           config.EthEvent,
+			MigrationPath:  "test/migration/path3",
+			MigrationRank:  1,
+			RepositoryPath: "test/repo/path",
+		},
+	},
+}
+
+var gapErrorConfig = config.Plugin{
+	Transformers: map[string]config.Transformer{
+		"transformer1": {
+			Path:           "test/init/path",
+			Type:           config.EthEvent,
+			MigrationPath:  "test/migration/path1",
+			MigrationRank:  0,
+			RepositoryPath: "test/repo/path",
+		},
+		"transformer2": {
+			Path:           "test/init/path",
+			Type:           config.EthEvent,
+			MigrationPath:  "test/migration/path2",
+			MigrationRank:  3,
+			RepositoryPath: "test/repo/path",
+		},
+		"transformer3": {
+			Path:           "test/init/path2",
+			Type:           config.EthEvent,
+			MigrationPath:  "test/migration/path3",
+			MigrationRank:  1,
+			RepositoryPath: "test/repo/path",
+		},
+	},
+}
+
+var missingRankErrorConfig = config.Plugin{
+	Transformers: map[string]config.Transformer{
+		"transformer1": {
+			Path:           "test/init/path",
+			Type:           config.EthEvent,
+			MigrationPath:  "test/migration/path1",
+			MigrationRank:  0,
+			RepositoryPath: "test/repo/path",
+		},
+		"transformer2": {
+			Path:           "test/init/path",
+			Type:           config.EthEvent,
+			MigrationPath:  "test/migration/path2",
+			RepositoryPath: "test/repo/path",
+		},
+		"transformer3": {
+			Path:           "test/init/path2",
+			Type:           config.EthEvent,
+			MigrationPath:  "test/migration/path3",
+			MigrationRank:  1,
+			RepositoryPath: "test/repo/path",
+		},
+	},
+}
+
+var duplicateErrorConfig = config.Plugin{
+	Transformers: map[string]config.Transformer{
+		"transformer1": {
+			Path:           "test/init/path",
+			Type:           config.EthEvent,
+			MigrationPath:  "test/migration/path1",
+			MigrationRank:  0,
+			RepositoryPath: "test/repo/path",
+		},
+		"transformer2": {
+			Path:           "test/init/path",
+			Type:           config.EthEvent,
+			MigrationPath:  "test/migration/path1",
+			RepositoryPath: "test/repo/path",
+			MigrationRank:  2,
+		},
+		"transformer3": {
+			Path:           "test/init/path2",
+			Type:           config.EthEvent,
+			MigrationPath:  "test/migration/path3",
+			MigrationRank:  1,
+			RepositoryPath: "test/repo/path",
+		},
+	},
+}
+
+var _ = Describe("GetMigrationsPaths", func() {
+	It("Sorts migration paths by rank", func() {
+		plugin := allDifferentPathsConfig
+		migrationPaths, err := plugin.GetMigrationsPaths()
+		Expect(err).ToNot(HaveOccurred())
+		Expect(len(migrationPaths)).To(Equal(3))
+
+		env := os.Getenv("GOPATH")
+		path1 := filepath.Join(env, "src/vendor/test/repo/path/test/migration/path1")
+		path2 := filepath.Join(env, "src/vendor/test/repo/path/test/migration/path3")
+		path3 := filepath.Join(env, "src/vendor/test/repo/path/test/migration/path2")
+		expectedMigrationPaths := []string{path1, path2, path3}
+		Expect(migrationPaths).To(Equal(expectedMigrationPaths))
+	})
+
+	It("Expects identical migration paths to have the same rank", func() {
+		plugin := overlappingPathsConfig
+		migrationPaths, err := plugin.GetMigrationsPaths()
+		Expect(err).ToNot(HaveOccurred())
+		Expect(len(migrationPaths)).To(Equal(2))
+
+		env := os.Getenv("GOPATH")
+		path1 := filepath.Join(env, "src/vendor/test/repo/path/test/migration/path1")
+		path2 := filepath.Join(env, "src/vendor/test/repo/path/test/migration/path3")
+		expectedMigrationPaths := []string{path1, path2}
+		Expect(migrationPaths).To(Equal(expectedMigrationPaths))
+	})
+
+	It("Fails if two different migration paths have the same rank", func() {
+		plugin := conflictErrorConfig
+		migrationPaths, err := plugin.GetMigrationsPaths()
+		Expect(err).To(HaveOccurred())
+		Expect(len(migrationPaths)).To(Equal(0))
+		Expect(err.Error()).To(ContainSubstring("has the same migration rank"))
+	})
+
+	It("Fails if there is a gap in the ranks of the migration paths", func() {
+		plugin := gapErrorConfig
+		migrationPaths, err := plugin.GetMigrationsPaths()
+		Expect(err).To(HaveOccurred())
+		Expect(len(migrationPaths)).To(Equal(0))
+		Expect(err.Error()).To(ContainSubstring("number of distinct ranks does not match number of distinct migration paths"))
+	})
+
+	It("Fails if a transformer is missing its rank", func() {
+		plugin := missingRankErrorConfig
+		migrationPaths, err := plugin.GetMigrationsPaths()
+		Expect(err).To(HaveOccurred())
+		Expect(len(migrationPaths)).To(Equal(0))
+		Expect(err.Error()).To(ContainSubstring("has the same migration rank"))
+	})
+
+	It("Fails if the same migration path has more than one rank", func() {
+		plugin := duplicateErrorConfig
+		migrationPaths, err := plugin.GetMigrationsPaths()
+		Expect(err).To(HaveOccurred())
+		Expect(len(migrationPaths)).To(Equal(0))
+		Expect(err.Error()).To(ContainSubstring("duplicate paths with different ranks present"))
+	})
+})

pkg/core/block.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/core/blockchain.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/core/contract.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/core/eth_client.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/core/header.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/core/log.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/core/node_info.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/core/receipts.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/core/rpc_client.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/core/topics.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/core/transaction.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/core/watched_event_log.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/crypto/crypto_suite_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/crypto/parser.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/crypto/parser_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/datastore/ethereum/config.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/datastore/ethereum/database.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/datastore/ethereum/level/database.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/datastore/ethereum/level/database_reader.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/datastore/ethereum/level/database_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/datastore/ethereum/level/level_suite_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/datastore/postgres/postgres.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/datastore/postgres/postgres_suite_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/datastore/postgres/postgres_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/datastore/postgres/repositories/block_repository.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/datastore/postgres/repositories/block_repository_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/datastore/postgres/repositories/contract_repository.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/datastore/postgres/repositories/contract_repository_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/datastore/postgres/repositories/header_repository.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/datastore/postgres/repositories/header_repository_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/datastore/postgres/repositories/log_filter_repository.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/datastore/postgres/repositories/log_filter_repository_test.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by

pkg/datastore/postgres/repositories/logs_repository.go

@@ -1,5 +1,5 @@
 // VulcanizeDB
-// Copyright © 2018 Vulcanize
+// Copyright © 2019 Vulcanize
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published by