145 lines
3.9 KiB
Go
145 lines
3.9 KiB
Go
// VulcanizeDB
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// Copyright © 2019 Vulcanize
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package manager
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import (
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"errors"
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"fmt"
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"github.com/vulcanize/vulcanizedb/pkg/config"
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"github.com/vulcanize/vulcanizedb/pkg/plugin/helpers"
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"io/ioutil"
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"os"
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"os/exec"
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"path/filepath"
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)
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// Interface for managing the db migrations for plugin transformers
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type MigrationManager interface {
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RunMigrations() error
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}
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type manager struct {
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GenConfig config.Plugin
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DBConfig config.Database
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tmpMigDir string
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}
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// Manager requires both filled in generator and database configs
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func NewMigrationManager(gc config.Plugin, dbc config.Database) *manager {
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return &manager{
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GenConfig: gc,
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DBConfig: dbc,
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}
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}
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func (m *manager) RunMigrations() error {
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// Get paths to db migrations from the plugin config
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paths, err := m.GenConfig.GetMigrationsPaths()
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if err != nil {
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return err
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}
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if len(paths) < 1 {
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return nil
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}
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// Init directory for temporary copies of migrations
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err = m.setupMigrationEnv()
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if err != nil {
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return err
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}
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defer m.cleanUp()
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// Creates copies of migrations for all the plugin's transformers in a tmp dir
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err = m.createMigrationCopies(paths)
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if err != nil {
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return err
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}
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return nil
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}
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// Setup a temporary directory to hold transformer db migrations
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func (m *manager) setupMigrationEnv() error {
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var err error
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m.tmpMigDir, err = helpers.CleanPath(filepath.Join("$GOPATH/src", m.GenConfig.Home+".plugin_migrations"))
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if err != nil {
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return err
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}
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err = os.RemoveAll(m.tmpMigDir)
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if err != nil {
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return errors.New(fmt.Sprintf("unable to remove file found at %s where tmp directory needs to be written", m.tmpMigDir))
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}
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err = os.Mkdir(m.tmpMigDir, os.FileMode(os.ModePerm))
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if err != nil {
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return errors.New(fmt.Sprintf("unable to create temporary migration directory %s", m.tmpMigDir))
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}
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return nil
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}
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// Create copies of db migrations from vendored libs
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func (m *manager) createMigrationCopies(paths []string) error {
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// Iterate through migration paths to find migration directory
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for _, path := range paths {
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dir, err := ioutil.ReadDir(path)
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if err != nil {
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return err
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}
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// For each file in the directory check if it is a migration
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for _, file := range dir {
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if file.IsDir() || filepath.Ext(file.Name()) != ".sql" {
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continue
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}
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src := filepath.Join(path, file.Name())
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dst := filepath.Join(m.tmpMigDir, file.Name())
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// and if it is make a copy of it to our tmp migration directory
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err = helpers.CopyFile(src, dst)
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if err != nil {
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return err
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}
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}
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err = m.fixAndRun(path)
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if err != nil {
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return err
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}
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}
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return nil
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}
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func (m *manager) fixAndRun(path string) error {
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// Fix the migrations
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cmd := exec.Command("goose", "fix")
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cmd.Dir = m.tmpMigDir
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err := cmd.Run()
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if err != nil {
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return errors.New(fmt.Sprintf("version fixing for plugin migrations at %s failed: %s", path, err.Error()))
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}
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// Run the copied migrations with goose
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pgStr := fmt.Sprintf("postgres://%s:%d/%s?sslmode=disable", m.DBConfig.Hostname, m.DBConfig.Port, m.DBConfig.Name)
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cmd = exec.Command("goose", "postgres", pgStr, "up")
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cmd.Dir = m.tmpMigDir
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err = cmd.Run()
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if err != nil {
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return errors.New(fmt.Sprintf("db migrations for plugin transformers at %s failed: %s", path, err.Error()))
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}
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return nil
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}
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func (m *manager) cleanUp() error {
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return os.RemoveAll(m.tmpMigDir)
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}
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