[MM-31085] Create a db init command to initialize the database (#16489)

Automatic Merge

cmd/mattermost/commands/db.go

@@ -0,0 +1,72 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package commands
+
+import (
+	"fmt"
+
+	"github.com/mattermost/mattermost-server/v5/config"
+	"github.com/mattermost/mattermost-server/v5/store/sqlstore"
+
+	"github.com/pkg/errors"
+	"github.com/spf13/cobra"
+)
+
+var DbCmd = &cobra.Command{
+	Use:   "db",
+	Short: "Commands related to the database",
+}
+
+var InitDbCmd = &cobra.Command{
+	Use:   "init",
+	Short: "Initialize the database",
+	Long: `Initialize the database for a given DSN, executing the migrations and loading the custom defaults if any.
+
+This command should be run using a database configuration DSN.`,
+	Example: `  # you can use the config flag to pass the DSN
+  $ mattermost db init --config postgres://localhost/mattermost
+
+  # or you can use the MM_CONFIG environment variable
+  $ MM_CONFIG=postgres://localhost/mattermost mattermost db init
+
+  # and you can set a custom defaults file to be loaded into the database
+  $ MM_CUSTOM_DEFAULTS_PATH=custom.json MM_CONFIG=postgres://localhost/mattermost mattermost db init`,
+	Args: cobra.NoArgs,
+	RunE: initDbCmdF,
+}
+
+func init() {
+	DbCmd.AddCommand(
+		InitDbCmd,
+	)
+
+	RootCmd.AddCommand(
+		DbCmd,
+	)
+}
+
+func initDbCmdF(command *cobra.Command, _ []string) error {
+	dsn := getConfigDSN(command, config.GetEnvironment())
+	if !config.IsDatabaseDSN(dsn) {
+		return errors.New("this command should be run using a database configuration DSN")
+	}
+
+	customDefaults, err := loadCustomDefaults()
+	if err != nil {
+		return errors.Wrap(err, "error loading custom configuration defaults")
+	}
+
+	configStore, err := config.NewStore(getConfigDSN(command, config.GetEnvironment()), false, customDefaults)
+	if err != nil {
+		return errors.Wrap(err, "failed to load configuration")
+	}
+	defer configStore.Close()
+
+	sqlStore := sqlstore.New(configStore.Get().SqlSettings, nil)
+	defer sqlStore.Close()
+
+	fmt.Println("Database store correctly initialised")
+
+	return nil
+}

cmd/mattermost/commands/server.go

@@ -4,7 +4,6 @@
 package commands
 
 import (
-	"encoding/json"
 	"net"
 	"os"
 	"os/signal"
@@ -16,7 +15,6 @@ import (
 	"github.com/mattermost/mattermost-server/v5/config"
 	"github.com/mattermost/mattermost-server/v5/manualtesting"
 	"github.com/mattermost/mattermost-server/v5/mlog"
-	"github.com/mattermost/mattermost-server/v5/model"
 	"github.com/mattermost/mattermost-server/v5/utils"
 	"github.com/mattermost/mattermost-server/v5/web"
 	"github.com/mattermost/mattermost-server/v5/wsapi"
@@ -24,8 +22,6 @@ import (
 	"github.com/spf13/cobra"
 )
 
-const CUSTOM_DEFAULTS_ENV_VAR = "MM_CUSTOM_DEFAULTS_PATH"
-
 var serverCmd = &cobra.Command{
 	Use:          "server",
 	Short:        "Run the Mattermost server",
@@ -38,27 +34,6 @@ func init() {
 	RootCmd.RunE = serverCmdF
 }
 
-func loadCustomDefaults() (*model.Config, error) {
-	customDefaultsPath := os.Getenv(CUSTOM_DEFAULTS_ENV_VAR)
-	if customDefaultsPath == "" {
-		return nil, nil
-	}
-
-	file, err := os.Open(customDefaultsPath)
-	if err != nil {
-		return nil, errors.Wrapf(err, "unable to open custom defaults file at %q", customDefaultsPath)
-	}
-	defer file.Close()
-
-	var customDefaults *model.Config
-	err = json.NewDecoder(file).Decode(&customDefaults)
-	if err != nil {
-		return nil, errors.Wrap(err, "unable to decode custom defaults configuration")
-	}
-
-	return customDefaults, nil
-}
-
 func serverCmdF(command *cobra.Command, args []string) error {
 	disableConfigWatch, _ := command.Flags().GetBool("disableconfigwatch")
 	usedPlatform, _ := command.Flags().GetBool("platform")

cmd/mattermost/commands/utils.go

@@ -5,15 +5,20 @@ package commands
 
 import (
 	"bytes"
+	"encoding/json"
 	"fmt"
+	"os"
 	"reflect"
 	"sort"
 	"strings"
 
 	"github.com/mattermost/mattermost-server/v5/mlog"
+	"github.com/mattermost/mattermost-server/v5/model"
 	"github.com/spf13/cobra"
 )
 
+const CUSTOM_DEFAULTS_ENV_VAR = "MM_CUSTOM_DEFAULTS_PATH"
+
 // prettyPrintStruct will return a prettyPrint version of a given struct
 func prettyPrintStruct(t interface{}) string {
 	return prettyPrintMap(structToMap(t))
@@ -116,3 +121,24 @@ func getConfigDSN(command *cobra.Command, env map[string]string) string {
 
 	return configDSN
 }
+
+func loadCustomDefaults() (*model.Config, error) {
+	customDefaultsPath := os.Getenv(CUSTOM_DEFAULTS_ENV_VAR)
+	if customDefaultsPath == "" {
+		return nil, nil
+	}
+
+	file, err := os.Open(customDefaultsPath)
+	if err != nil {
+		return nil, fmt.Errorf("unable to open custom defaults file at %q: %w", customDefaultsPath, err)
+	}
+	defer file.Close()
+
+	var customDefaults *model.Config
+	err = json.NewDecoder(file).Decode(&customDefaults)
+	if err != nil {
+		return nil, fmt.Errorf("unable to decode custom defaults configuration: %w", err)
+	}
+
+	return customDefaults, nil
+}