Adding upstream version 1.34.4.

Signed-off-by: Daniel Baumann <daniel@debian.org>

migrations/registry.go

@@ -0,0 +1,48 @@
+package migrations
+
+import (
+	"errors"
+	"fmt"
+
+	"github.com/influxdata/toml/ast"
+)
+
+var ErrNotApplicable = errors.New("no migration applied")
+
+type PluginMigrationFunc func(*ast.Table) ([]byte, string, error)
+
+var PluginMigrations = make(map[string]PluginMigrationFunc)
+
+func AddPluginMigration(name string, f PluginMigrationFunc) {
+	if _, found := PluginMigrations[name]; found {
+		panic(fmt.Errorf("plugin migration function already registered for %q", name))
+	}
+	PluginMigrations[name] = f
+}
+
+type PluginOptionMigrationFunc PluginMigrationFunc
+
+var PluginOptionMigrations = make(map[string]PluginOptionMigrationFunc)
+
+func AddPluginOptionMigration(name string, f PluginOptionMigrationFunc) {
+	if _, found := PluginOptionMigrations[name]; found {
+		panic(fmt.Errorf("plugin option migration function already registered for %q", name))
+	}
+	PluginOptionMigrations[name] = f
+}
+
+type GeneralMigrationFunc func(string, string, *ast.Table) ([]byte, string, error)
+
+var GeneralMigrations []GeneralMigrationFunc
+
+func AddGeneralMigration(f GeneralMigrationFunc) {
+	GeneralMigrations = append(GeneralMigrations, f)
+}
+
+type GlobalMigrationFunc func(string, *ast.Table) ([]byte, string, error)
+
+var GlobalMigrations []GlobalMigrationFunc
+
+func AddGlobalMigration(f GlobalMigrationFunc) {
+	GlobalMigrations = append(GlobalMigrations, f)
+}