Add refresh command. Add long help messages for each command.

command/init.go

@@ -1,7 +1,6 @@
 package command
 
 import (
-	"fmt"
 	"github.com/limoli/dbshift/lib"
 	"github.com/limoli/dbshift/util"
 )
@@ -36,7 +35,7 @@ func Init(db lib.IDb) {
 
 	importedMigrations, err := db.ImportMigrations(iMigrations)
 	if err != nil {
-		fmt.Println(err)
+		util.Exit(lib.NewError(err.Error()))
 	} else {
 		lib.Success("%d migrations have been imported", importedMigrations/2)
 	}

command/refresh.go

@@ -0,0 +1,28 @@
+package command
+
+import (
+	"github.com/limoli/dbshift/lib"
+	"github.com/limoli/dbshift/util"
+)
+
+// Refresh is the command to discover and import new migrations
+func Refresh(db lib.IDb) {
+	migrations, err := lib.ReadMigrationsFromLockFile()
+	if err != nil {
+		util.Exit(err)
+	}
+
+	lib.Success("%d migrations have been detected in lock file", len(migrations)/2)
+
+	iMigrations := make([]lib.IMigration, 0)
+	for k := range migrations {
+		iMigrations = append(iMigrations, &migrations[k])
+	}
+
+	importedMigrations, err := db.ImportMigrations(iMigrations)
+	if err != nil {
+		util.Exit(lib.NewError(err.Error()))
+	} else {
+		lib.Success("%d migrations have been imported", importedMigrations/2)
+	}
+}

main.go

@@ -33,7 +33,10 @@ func main() {
 	}
 
 	if len(os.Args) > 1 {
-		shell.Process(os.Args[1:]...)
+		err = shell.Process(os.Args[1:]...)
+		if err != nil {
+			util.Exit(err)
+		}
 	} else {
 		shell.Run()
 	}
@@ -57,29 +60,41 @@ func getDatabase(dbType lib.DatabaseType) (lib.IDb, error) {
 func getShellCommands(db lib.IDb) []*ishell.Cmd {
 	return []*ishell.Cmd{
 		{
-			Name: "init",
-			Help: "init",
+			Name:     "init",
+			Help:     "init",
+			LongHelp: "Install dbshift using your database.",
 			Func: func(c *ishell.Context) {
 				util.ExitIfInitialised(db)
 				command.Init(db)
 			},
 		}, {
-			Name: "info",
-			Help: "info",
+			Name:     "refresh",
+			Help:     "refresh",
+			LongHelp: "It discovers and imports new migrations.",
+			Func: func(c *ishell.Context) {
+				util.ExitIfNotInitialised(db)
+				command.Refresh(db)
+			},
+		}, {
+			Name:     "info",
+			Help:     "info",
+			LongHelp: "It returns information about dbshift.",
 			Func: func(c *ishell.Context) {
 				util.ExitIfNotInitialised(db)
 				command.Info()
 			},
 		}, {
-			Name: "status",
-			Help: "status",
+			Name:     "status",
+			Help:     "status",
+			LongHelp: "It returns the current status of database along migrations.",
 			Func: func(c *ishell.Context) {
 				util.ExitIfNotInitialised(db)
 				command.Status(db)
 			},
 		}, {
-			Name: "create",
-			Help: "create <description>",
+			Name:     "create",
+			Help:     "create <description>",
+			LongHelp: "It creates a migration with description.",
 			Func: func(c *ishell.Context) {
 				util.ExitIfNotInitialised(db)
 				if len(c.Args) != 1 {
@@ -89,29 +104,33 @@ func getShellCommands(db lib.IDb) []*ishell.Cmd {
 				command.Create(db, description)
 			},
 		}, {
-			Name: "migrations-upgrade",
-			Help: "migrations-upgrade",
+			Name:     "migrations-upgrade",
+			Help:     "migrations-upgrade",
+			LongHelp: "It returns the list of migrations eligible to upgrade.",
 			Func: func(c *ishell.Context) {
 				util.ExitIfNotInitialised(db)
 				command.Migrations(db, lib.Upgrade)
 			},
 		}, {
-			Name: "migrations-downgrade",
-			Help: "migrations-downgrade",
+			Name:     "migrations-downgrade",
+			Help:     "migrations-downgrade",
+			LongHelp: "It returns the list of migrations eligible to downgrade.",
 			Func: func(c *ishell.Context) {
 				util.ExitIfNotInitialised(db)
 				command.Migrations(db, lib.Downgrade)
 			},
 		}, {
-			Name: "upgrade",
-			Help: "upgrade",
+			Name:     "upgrade",
+			Help:     "upgrade",
+			LongHelp: "It upgrades all the migrations eligible to upgrade.",
 			Func: func(c *ishell.Context) {
 				util.ExitIfNotInitialised(db)
 				command.Execute(db, lib.Upgrade)
 			},
 		}, {
-			Name: "downgrade",
-			Help: "downgrade",
+			Name:     "downgrade",
+			Help:     "downgrade",
+			LongHelp: "It downgrades all the migrations eligible to downgrade.",
 			Func: func(c *ishell.Context) {
 				util.ExitIfNotInitialised(db)
 				command.Execute(db, lib.Downgrade)