Fork imapsql-ctl utility from go-imap-sql repo

1. There is only one version for maddy and imapsql-ctl utility.
This prevents confusion about compatibility.

2. Modified imapsql-ctl understands maddy config format, this allows
it to read needed values from it without the need for lengthy commmand
line arguments.

Closes #148.

.gitignore

@@ -22,6 +22,7 @@ _testmain.go
 
 # Compiled binaries
 cmd/maddy/maddy
+cmd/imapsql-ctl/imapsql-ctl
 cmd/maddy-*-helper/maddy-*-helper
 
 # Config files

README.md

@@ -149,7 +149,7 @@ You need to change the following directives to your values:
 
 With that configuration you will get the following:
 - SQLite-based storage for messages
-- Authentication using SQLite-based virtual users DB (use [imapsql-ctl]( https://github.com/foxcpp/go-imap-sql/tree/master/cmd/imapsql-ctl) to create user accounts)
+- Authentication using SQLite-based virtual users DB (see [imapsql-ctl utility](#imapsql-ctl-utility))
 - SMTP endpoint for incoming messages on 25 port.
 - SMTP Submission endpoint for messages from your users, on both 587 (STARTTLS) 
 and 465 (TLS) ports.
@@ -177,27 +177,35 @@ below.
 
 Note that it will require users to specify full address as username when logging in.
 
-## SQL-based database
+## imapsql-ctl utility
 
 Currently, the only supported storage and authentication DB implementation
 is SQL-based go-imap-sql library.
 
-Use the following commands to install the `imapsql-ctl` utility:
+To manage virtual users, mailboxes and messages in them imapsql-ctl utility
+should be used. It can be installed using the following command:
 ```
-export GO111MODULE=on
-go get github.com/foxcpp/go-imap-sql/cmd/imapsql-ctl@dev
+go get github.com/foxcpp/maddy/cmd/imapsql-ctl@master
+```
+**Note:** Use the same version as maddy, e.g. if you installed maddy X.Y.Z, 
+then use the following command:
+```
+go get github.com/foxcpp/maddy/cmd/imapsql-ctl@vX.Y.Z
 ```
 
-It can be used to create/delete virtual users as well as mailboxes
-and messages in them.
+As with any other `go get` command, binary will be placed in `$GOPATH/bin`
+($HOME/go/bin by default).
 
-Here is the command to use to create a new virtual user `NAME`:
+
+Here is the command to create virtual user account:
 ```
-imapsql-ctl --driver DRIVER --dsn DSN --fsstore FSSTORE_PATH users create NAME
+imapsql-ctl users create foxcpp
 ```
 
-Replace DRIVER and DSN with your values from maddy config.
-For default configuration it is `--driver sqlite3 --dsn /var/lib/maddy/all.db --fsstore /var/lib/maddy/sql-local_mailboxes-fsstore`.
+It assumes you use default locations for state directory and config file.
+If that's not the case, provide `-config` and/or `-state` arguments that
+specify used values.
+
 
 ### PostgreSQL instead of SQLite
 

cmd/imapsql-ctl/README.md

@@ -0,0 +1,17 @@
+imapsql-ctl utility
+-------------------
+
+Maddy fork of utility from go-imap-sql repo, extended with functionality to
+parse maddy configuration files.
+
+#### --unsafe option
+
+Per RFC 3501, server must send notifications to clients about any mailboxes
+change. Since imapsql-ctl is a low-level tool it doesn't implements any way to
+tell server to send such notifications. Most popular SQL RDBMSs don't provide
+any means to detect database change and we currently have no plans on
+implementing anything for that on go-imap-sql level.
+
+Therefore, you generally should avoid writting to mailboxes if client who owns
+this mailbox is connected to the server. Failure to send required notifications
+may result in data damage depending on client implementation.

cmd/imapsql-ctl/appendlimit.go

@@ -0,0 +1,35 @@
+package main
+
+import appendlimit "github.com/emersion/go-imap-appendlimit"
+
+// Copied from go-imap-backend-tests.
+
+// AppendLimitBackend is extension for main backend interface (backend.Backend) which
+// allows to set append limit value for testing and administration purposes.
+type AppendLimitBackend interface {
+	appendlimit.Backend
+
+	// SetMessageLimit sets new value for limit.
+	// nil pointer means no limit.
+	SetMessageLimit(val *uint32) error
+}
+
+// AppendLimitUser is extension for backend.User interface which allows to
+// set append limit value for testing and administration purposes.
+type AppendLimitUser interface {
+	appendlimit.User
+
+	// SetMessageLimit sets new value for limit.
+	// nil pointer means no limit.
+	SetMessageLimit(val *uint32) error
+}
+
+// AppendLimitMbox is extension for backend.Mailbox interface which allows to
+// set append limit value for testing and administration purposes.
+type AppendLimitMbox interface {
+	CreateMessageLimit() *uint32
+
+	// SetMessageLimit sets new value for limit.
+	// nil pointer means no limit.
+	SetMessageLimit(val *uint32) error
+}

cmd/imapsql-ctl/config.go

@@ -0,0 +1,65 @@
+package main
+
+import (
+	"errors"
+	"os"
+
+	imapsql "github.com/foxcpp/go-imap-sql"
+	"github.com/foxcpp/maddy/config"
+	"github.com/foxcpp/maddy/config/parser"
+	"github.com/foxcpp/maddy/storage/sql"
+)
+
+func backendFromCfg(path, cfgBlock string) (*imapsql.Backend, error) {
+	f, err := os.Open(path)
+	nodes, err := parser.Read(f, path)
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	// Global variables relevant for sql module.
+	globals := config.NewMap(nil, &config.Node{Children: nodes})
+	globals.Bool("auth_perdomain", false, false, nil)
+	globals.StringList("auth_domains", false, false, nil, nil)
+	globals.AllowUnknown()
+	_, err = globals.Process()
+	if err != nil {
+		return nil, err
+	}
+
+	for _, node := range nodes {
+		if node.Name != "sql" {
+			continue
+		}
+
+		if len(node.Args) == 0 && cfgBlock == "sql" {
+			return backendFromNode(globals.Values, node)
+		}
+
+		for _, arg := range node.Args {
+			if arg == cfgBlock {
+				return backendFromNode(globals.Values, node)
+			}
+		}
+	}
+
+	return nil, errors.New("no requested block found in configuration")
+}
+
+func backendFromNode(globals map[string]interface{}, node config.Node) (*imapsql.Backend, error) {
+	instName := "sql"
+	if len(node.Args) >= 1 {
+		instName = node.Args[0]
+	}
+
+	mod, err := sql.New("sql", instName, nil, nil)
+	if err != nil {
+		return nil, err
+	}
+	if err := mod.Init(config.NewMap(globals, &node)); err != nil {
+		return nil, err
+	}
+
+	return mod.(*sql.Storage).Back, nil
+}

cmd/imapsql-ctl/flags.go

@@ -0,0 +1,65 @@
+package main
+
+import (
+	"errors"
+
+	"github.com/emersion/go-imap"
+	"github.com/urfave/cli"
+)
+
+func msgsFlags(ctx *cli.Context) error {
+	if err := connectToDB(ctx); err != nil {
+		return err
+	}
+
+	if !ctx.GlobalBool("unsafe") {
+		return errors.New("Error: Refusing to edit mailboxes without --unsafe")
+	}
+
+	username := ctx.Args().First()
+	if username == "" {
+		return errors.New("Error: USERNAME is required")
+	}
+	name := ctx.Args().Get(1)
+	if name == "" {
+		return errors.New("Error: MAILBOX is required")
+	}
+	seqStr := ctx.Args().Get(2)
+	if seqStr == "" {
+		return errors.New("Error: SEQ is required")
+	}
+
+	seq, err := imap.ParseSeqSet(seqStr)
+	if err != nil {
+		return err
+	}
+
+	u, err := backend.GetUser(username)
+	if err != nil {
+		return err
+	}
+
+	mbox, err := u.GetMailbox(name)
+	if err != nil {
+		return err
+	}
+
+	flags := ctx.Args()[3:]
+	if len(flags) == 0 {
+		return errors.New("Error: at least once FLAG is required")
+	}
+
+	var op imap.FlagsOp
+	switch ctx.Command.Name {
+	case "add-flags":
+		op = imap.AddFlags
+	case "rem-flags":
+		op = imap.RemoveFlags
+	case "set-flags":
+		op = imap.SetFlags
+	default:
+		panic("unknown command: " + ctx.Command.Name)
+	}
+
+	return mbox.UpdateMessagesFlags(ctx.IsSet("uid"), seq, op, flags)
+}

cmd/imapsql-ctl/main.go

@@ -0,0 +1,428 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"path/filepath"
+
+	imapsql "github.com/foxcpp/go-imap-sql"
+	"github.com/foxcpp/maddy/config"
+	"github.com/urfave/cli"
+	"golang.org/x/crypto/bcrypt"
+)
+
+var backend *imapsql.Backend
+var stdinScnr *bufio.Scanner
+
+func connectToDB(ctx *cli.Context) error {
+	if ctx.GlobalIsSet("unsafe") && !ctx.GlobalIsSet("quiet") {
+		fmt.Fprintln(os.Stderr, "WARNING: Using --unsafe with running server may lead to accidential damage to data due to desynchronization with connected clients.")
+	}
+
+	driver := ctx.GlobalString("driver")
+	if driver != "" {
+		// Construct artificial config file tree from command line arguments
+		// and pass to initialization logic.
+		cfg := config.Node{
+			Name: "sql",
+			Children: []config.Node{
+				{
+					Name: "driver",
+					Args: []string{ctx.GlobalString("driver")},
+				},
+				{
+					Name: "dsn",
+					Args: []string{ctx.GlobalString("dsn")},
+				},
+				{
+					Name: "fsstore",
+					Args: []string{ctx.GlobalString("fsstore")},
+				},
+			},
+		}
+		var err error
+		backend, err = backendFromNode(make(map[string]interface{}), cfg)
+		if err != nil {
+			return err
+		}
+	} else {
+		cfg := ctx.GlobalString("config")
+
+		cfgAbs, err := filepath.Abs(cfg)
+		if err != nil {
+			return err
+		}
+
+		cfgBlock := ctx.GlobalString("cfg-block")
+		if err := os.Chdir(ctx.GlobalString("state")); err != nil {
+			return err
+		}
+
+		backend, err = backendFromCfg(cfgAbs, cfgBlock)
+		if err != nil {
+			return err
+		}
+	}
+
+	backend.EnableSpecialUseExt()
+
+	return nil
+}
+
+func closeBackend(ctx *cli.Context) (err error) {
+	if backend != nil {
+		return backend.Close()
+	}
+	return nil
+}
+
+func main() {
+	stdinScnr = bufio.NewScanner(os.Stdin)
+
+	app := cli.NewApp()
+	app.Name = "imapsql-ctl"
+	app.Copyright = "(c) 2019 Max Mazurov <fox.cpp@disroot.org>\n   Published under the terms of the MIT license (https://opensource.org/licenses/MIT)"
+	app.Usage = "SQL database management utility for maddy"
+	app.Version = buildInfo()
+	app.After = closeBackend
+
+	app.Flags = []cli.Flag{
+		cli.StringFlag{
+			Name:   "config",
+			Usage:  "Configuration file to use",
+			EnvVar: "MADDY_CONFIG",
+			Value:  "/etc/maddy/maddy.conf",
+		},
+		cli.StringFlag{
+			Name:   "state",
+			Usage:  "State directory to use",
+			EnvVar: "MADDY_STATE",
+			Value:  "/var/lib/maddy",
+		},
+		cli.StringFlag{
+			Name:   "cfg-block",
+			Usage:  "SQL module configuration to use",
+			EnvVar: "MADDY_CFGBLOCK",
+			Value:  "local_mailboxes",
+		},
+		cli.StringFlag{
+			Name:   "driver",
+			Usage:  "Directly specify driver value instead of reading it from config",
+			EnvVar: "MADDY_SQL_DRIVER",
+			Value:  "",
+		},
+		cli.StringFlag{
+			Name:   "dsn",
+			Usage:  "Directly specify dsn value instead of reading it from config",
+			EnvVar: "MADDY_SQL_DSN",
+			Value:  "",
+		},
+		cli.StringFlag{
+			Name:   "fsstore",
+			Usage:  "Directly specify fsstore value instead of reading it from config",
+			EnvVar: "MADDY_SQL_FSSTORE",
+			Value:  "",
+		},
+		cli.BoolFlag{
+			Name:  "quiet,q",
+			Usage: "Don't print user-friendly messages to stderr",
+		},
+		cli.BoolFlag{
+			Name:  "unsafe",
+			Usage: "Allow to perform actions that can be safely done only without running server",
+		},
+	}
+
+	app.Commands = []cli.Command{
+		{
+			Name:  "mboxes",
+			Usage: "Mailboxes (folders) management",
+			Subcommands: []cli.Command{
+				{
+					Name:      "list",
+					Usage:     "Show mailboxes of user",
+					ArgsUsage: "USERNAME",
+					Flags: []cli.Flag{
+						cli.BoolFlag{
+							Name:  "subscribed,s",
+							Usage: "List only subscribed mailboxes",
+						},
+					},
+					Action: mboxesList,
+				},
+				{
+					Name:      "create",
+					Usage:     "Create mailbox",
+					ArgsUsage: "USERNAME NAME",
+					Action:    mboxesCreate,
+					Flags: []cli.Flag{
+						cli.StringFlag{
+							Name:  "special",
+							Usage: "Set SPECIAL-USE attribute on mailbox; valid values: archive, drafts, junk, sent, trash",
+						},
+					},
+				},
+				{
+					Name:        "remove",
+					Usage:       "Remove mailbox (requires --unsafe)",
+					Description: "WARNING: All contents of mailbox will be irrecoverably lost.",
+					ArgsUsage:   "USERNAME MAILBOX",
+					Flags: []cli.Flag{
+						cli.BoolFlag{
+							Name:  "yes,y",
+							Usage: "Don't ask for confirmation",
+						},
+					},
+					Action: mboxesRemove,
+				},
+				{
+					Name:        "rename",
+					Usage:       "Rename mailbox (requires --unsafe)",
+					Description: "Rename may cause unexpected failures on client-side so be careful.",
+					ArgsUsage:   "USERNAME OLDNAME NEWNAME",
+					Action:      mboxesRename,
+				},
+				{
+					Name:      "appendlimit",
+					Usage:     "Query or set user's APPENDLIMIT value",
+					ArgsUsage: "USERNAME",
+					Flags: []cli.Flag{
+						cli.IntFlag{
+							Name:  "value,v",
+							Usage: "Set APPENDLIMIT to specified value (in bytes). Pass -1 to disable limit.",
+						},
+					},
+					Action: mboxesAppendLimit,
+				},
+			},
+		},
+		{
+			Name:  "msgs",
+			Usage: "Messages management",
+			Subcommands: []cli.Command{
+				{
+					Name:        "add",
+					Usage:       "Add message to mailbox (requires --unsafe)",
+					ArgsUsage:   "USERNAME MAILBOX",
+					Description: "Reads message body (with headers) from stdin. Prints UID of created message on success.",
+					Flags: []cli.Flag{
+						cli.StringSliceFlag{
+							Name:  "flag,f",
+							Usage: "Add flag to message. Can be specified multiple times",
+						},
+						cli.Int64Flag{
+							Name:  "date,d",
+							Usage: "Set internal date value to specified UNIX timestamp",
+						},
+					},
+					Action: msgsAdd,
+				},
+				{
+					Name:        "add-flags",
+					Usage:       "Add flags to messages (requires --unsafe)",
+					ArgsUsage:   "USERNAME MAILBOX SEQ FLAGS...",
+					Description: "Add flags to all messages matched by SEQ.",
+					Flags: []cli.Flag{
+						cli.BoolFlag{
+							Name:  "uid,u",
+							Usage: "Use UIDs for SEQSET instead of sequence numbers",
+						},
+					},
+					Action: msgsFlags,
+				},
+				{
+					Name:        "rem-flags",
+					Usage:       "Remove flags from messages (requires --unsafe)",
+					ArgsUsage:   "USERNAME MAILBOX SEQ FLAGS...",
+					Description: "Remove flags from all messages matched by SEQ.",
+					Flags: []cli.Flag{
+						cli.BoolFlag{
+							Name:  "uid,u",
+							Usage: "Use UIDs for SEQSET instead of sequence numbers",
+						},
+					},
+					Action: msgsFlags,
+				},
+				{
+					Name:        "set-flags",
+					Usage:       "Set flags on messages (requires --unsafe)",
+					ArgsUsage:   "USERNAME MAILBOX SEQ FLAGS...",
+					Description: "Set flags on all messages matched by SEQ.",
+					Flags: []cli.Flag{
+						cli.BoolFlag{
+							Name:  "uid,u",
+							Usage: "Use UIDs for SEQSET instead of sequence numbers",
+						},
+					},
+					Action: msgsFlags,
+				},
+				{
+					Name:      "remove",
+					Usage:     "Remove messages from mailbox (requires --unsafe)",
+					ArgsUsage: "USERNAME MAILBOX SEQSET",
+					Flags: []cli.Flag{
+						cli.BoolFlag{
+							Name:  "uid,u",
+							Usage: "Use UIDs for SEQSET instead of sequence numbers",
+						},
+						cli.BoolFlag{
+							Name:  "yes,y",
+							Usage: "Don't ask for confirmation",
+						},
+					},
+					Action: msgsRemove,
+				},
+				{
+					Name:        "copy",
+					Usage:       "Copy messages between mailboxes (requires --unsafe)",
+					Description: "Note: You can't copy between mailboxes of different users. APPENDLIMIT of target mailbox is not enforced.",
+					ArgsUsage:   "USERNAME SRCMAILBOX SEQSET TGTMAILBOX",
+					Flags: []cli.Flag{
+						cli.BoolFlag{
+							Name:  "uid,u",
+							Usage: "Use UIDs for SEQSET instead of sequence numbers",
+						},
+					},
+					Action: msgsCopy,
+				},
+				{
+					Name:        "move",
+					Usage:       "Move messages between mailboxes (requires --unsafe)",
+					Description: "Note: You can't move between mailboxes of different users. APPENDLIMIT of target mailbox is not enforced.",
+					ArgsUsage:   "USERNAME SRCMAILBOX SEQSET TGTMAILBOX",
+					Flags: []cli.Flag{
+						cli.BoolFlag{
+							Name:  "uid,u",
+							Usage: "Use UIDs for SEQSET instead of sequence numbers",
+						},
+					},
+					Action: msgsMove,
+				},
+				{
+					Name:        "list",
+					Usage:       "List messages in mailbox",
+					Description: "If SEQSET is specified - only show messages that match it.",
+					ArgsUsage:   "USERNAME MAILBOX [SEQSET]",
+					Flags: []cli.Flag{
+						cli.BoolFlag{
+							Name:  "uid,u",
+							Usage: "Use UIDs for SEQSET instead of sequence numbers",
+						},
+						cli.BoolFlag{
+							Name:  "full,f",
+							Usage: "Show entire envelope and all server meta-data",
+						},
+					},
+					Action: msgsList,
+				},
+				{
+					Name:        "dump",
+					Usage:       "Dump message body",
+					Description: "If passed SEQ matches multiple messages - they will be joined.",
+					ArgsUsage:   "USERNAME MAILBOX SEQ",
+					Flags: []cli.Flag{
+						cli.BoolFlag{
+							Name:  "uid,u",
+							Usage: "Use UIDs for SEQ instead of sequence numbers",
+						},
+					},
+					Action: msgsDump,
+				},
+			},
+		},
+		{
+			Name:  "users",
+			Usage: "User accounts management",
+			Subcommands: []cli.Command{
+				{
+					Name:   "list",
+					Usage:  "List created user accounts",
+					Action: usersList,
+				},
+				{
+					Name:        "create",
+					Usage:       "Create user account",
+					Description: "Reads password from stdin",
+					ArgsUsage:   "USERNAME",
+					Flags: []cli.Flag{
+						cli.StringFlag{
+							Name:  "password,p",
+							Usage: "Use `PASSWORD instead of reading password from stdin.\n\t\tWARNING: Provided only for debugging convenience. Don't leave your passwords in shell history!",
+						},
+						cli.BoolFlag{
+							Name:  "null,n",
+							Usage: "Create account with null password",
+						},
+						cli.StringFlag{
+							Name:  "hash",
+							Usage: "Use specified hash algorithm. Valid values: sha3-512, bcrypt",
+							Value: "bcrypt",
+						},
+						cli.IntFlag{
+							Name:  "bcrypt-cost",
+							Usage: "Specify bcrypt cost value",
+							Value: bcrypt.DefaultCost,
+						},
+					},
+					Action: usersCreate,
+				},
+				{
+					Name:      "remove",
+					Usage:     "Delete user account (requires --unsafe)",
+					ArgsUsage: "USERNAME",
+					Flags: []cli.Flag{
+						cli.BoolFlag{
+							Name:  "yes,y",
+							Usage: "Don't ask for confirmation",
+						},
+					},
+					Action: usersRemove,
+				},
+				{
+					Name:        "password",
+					Usage:       "Change account password",
+					Description: "Reads password from stdin",
+					ArgsUsage:   "USERNAME",
+					Flags: []cli.Flag{
+						cli.StringFlag{
+							Name:  "password,p",
+							Usage: "Use `PASSWORD` instead of reading password from stdin.\n\t\tWARNING: Provided only for debugging convenience. Don't leave your passwords in shell history!",
+						},
+						cli.BoolFlag{
+							Name:  "null,n",
+							Usage: "Set password to null",
+						},
+						cli.StringFlag{
+							Name:  "hash",
+							Usage: "Use specified hash algorithm. Valid values: sha3-512, bcrypt",
+							Value: "sha3-512",
+						},
+						cli.IntFlag{
+							Name:  "bcrypt-cost",
+							Usage: "Specify bcrypt cost value",
+							Value: bcrypt.DefaultCost,
+						},
+					},
+					Action: usersPassword,
+				},
+				{
+					Name:      "appendlimit",
+					Usage:     "Query or set user's APPENDLIMIT value",
+					ArgsUsage: "USERNAME",
+					Flags: []cli.Flag{
+						cli.IntFlag{
+							Name:  "value,v",
+							Usage: "Set APPENDLIMIT to specified value (in bytes)",
+						},
+					},
+					Action: usersAppendLimit,
+				},
+			},
+		},
+	}
+
+	if err := app.Run(os.Args); err != nil {
+		fmt.Fprintln(os.Stderr, err)
+	}
+}

cmd/imapsql-ctl/mboxes.go

@@ -0,0 +1,210 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"strings"
+
+	eimap "github.com/emersion/go-imap"
+	imapsql "github.com/foxcpp/go-imap-sql"
+	"github.com/urfave/cli"
+)
+
+func mboxesList(ctx *cli.Context) error {
+	if err := connectToDB(ctx); err != nil {
+		return err
+	}
+
+	username := ctx.Args().First()
+	if username == "" {
+		return errors.New("Error: USERNAME is required")
+	}
+
+	u, err := backend.GetUser(username)
+	if err != nil {
+		return err
+	}
+
+	mboxes, err := u.ListMailboxes(ctx.Bool("subscribed,s"))
+	if err != nil {
+		return err
+	}
+
+	if len(mboxes) == 0 && !ctx.GlobalBool("quiet") {
+		fmt.Fprintln(os.Stderr, "No mailboxes.")
+	}
+
+	for _, mbox := range mboxes {
+		info, err := mbox.Info()
+		if err != nil {
+			return err
+		}
+
+		if len(info.Attributes) != 0 {
+			fmt.Print(info.Name, "\t", info.Attributes, "\n")
+		} else {
+			fmt.Println(info.Name)
+		}
+	}
+
+	return nil
+}
+
+func mboxesCreate(ctx *cli.Context) error {
+	if err := connectToDB(ctx); err != nil {
+		return err
+	}
+
+	username := ctx.Args().First()
+	if username == "" {
+		return errors.New("Error: USERNAME is required")
+	}
+	name := ctx.Args().Get(1)
+	if name == "" {
+		return errors.New("Error: NAME is required")
+	}
+
+	u, err := backend.GetUser(username)
+	if err != nil {
+		return err
+	}
+
+	if ctx.IsSet("special") {
+		attr := "\\" + strings.Title(ctx.String("special"))
+		return u.(*imapsql.User).CreateMailboxSpecial(name, attr)
+	}
+
+	return u.CreateMailbox(name)
+}
+
+func mboxesRemove(ctx *cli.Context) error {
+	if err := connectToDB(ctx); err != nil {
+		return err
+	}
+
+	if !ctx.GlobalBool("unsafe") {
+		return errors.New("Error: Refusing to edit mailboxes without --unsafe")
+	}
+
+	username := ctx.Args().First()
+	if username == "" {
+		return errors.New("Error: USERNAME is required")
+	}
+	name := ctx.Args().Get(1)
+	if name == "" {
+		return errors.New("Error: NAME is required")
+	}
+
+	u, err := backend.GetUser(username)
+	if err != nil {
+		return err
+	}
+
+	mbox, err := u.GetMailbox(name)
+	if err != nil {
+		return err
+	}
+
+	if !ctx.Bool("yes,y") {
+		status, err := mbox.Status([]eimap.StatusItem{eimap.StatusMessages})
+		if err != nil {
+			return err
+		}
+
+		if status.Messages != 0 {
+			fmt.Fprintf(os.Stderr, "Mailbox %s contains %d messages.\n", name, status.Messages)
+		}
+
+		if !Confirmation("Are you sure you want to delete that mailbox?", false) {
+			return errors.New("Cancelled")
+		}
+	}
+
+	if err := u.DeleteMailbox(name); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func mboxesRename(ctx *cli.Context) error {
+	if err := connectToDB(ctx); err != nil {
+		return err
+	}
+
+	if !ctx.GlobalBool("unsafe") {
+		return errors.New("Error: Refusing to edit mailboxes without --unsafe")
+	}
+
+	username := ctx.Args().First()
+	if username == "" {
+		return errors.New("Error: USERNAME is required")
+	}
+	oldName := ctx.Args().Get(1)
+	if oldName == "" {
+		return errors.New("Error: OLDNAME is required")
+	}
+	newName := ctx.Args().Get(2)
+	if newName == "" {
+		return errors.New("Error: NEWNAME is required")
+	}
+
+	u, err := backend.GetUser(username)
+	if err != nil {
+		return err
+	}
+
+	return u.RenameMailbox(oldName, newName)
+}
+
+func mboxesAppendLimit(ctx *cli.Context) error {
+	if err := connectToDB(ctx); err != nil {
+		return err
+	}
+
+	username := ctx.Args().First()
+	if username == "" {
+		return errors.New("Error: USERNAME is required")
+	}
+	name := ctx.Args().Get(1)
+	if name == "" {
+		return errors.New("Error: MAILBOX is required")
+	}
+
+	u, err := backend.GetUser(username)
+	if err != nil {
+		return err
+	}
+
+	mbox, err := u.GetMailbox(name)
+	if err != nil {
+		return err
+	}
+
+	mboxAL := mbox.(AppendLimitMbox)
+
+	if ctx.IsSet("value,v") {
+		val := ctx.Int("value,v")
+
+		var err error
+		if val == -1 {
+			err = mboxAL.SetMessageLimit(nil)
+		} else {
+			val32 := uint32(val)
+			err = mboxAL.SetMessageLimit(&val32)
+		}
+		if err != nil {
+			return err
+		}
+	} else {
+		lim := mboxAL.CreateMessageLimit()
+		if lim == nil {
+			fmt.Println("No limit")
+		} else {
+			fmt.Println(*lim)
+		}
+	}
+
+	return nil
+}

cmd/imapsql-ctl/msgs.go

@@ -0,0 +1,344 @@
+package main
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"io"
+	"os"
+	"time"
+
+	eimap "github.com/emersion/go-imap"
+	imapsql "github.com/foxcpp/go-imap-sql"
+	"github.com/urfave/cli"
+)
+
+func msgsAdd(ctx *cli.Context) error {
+	if err := connectToDB(ctx); err != nil {
+		return err
+	}
+
+	if !ctx.GlobalBool("unsafe") {
+		return errors.New("Error: Refusing to edit mailboxes without --unsafe")
+	}
+
+	username := ctx.Args().First()
+	if username == "" {
+		return errors.New("Error: USERNAME is required")
+	}
+	name := ctx.Args().Get(1)
+	if name == "" {
+		return errors.New("Error: MAILBOX is required")
+	}
+
+	u, err := backend.GetUser(username)
+	if err != nil {
+		return err
+	}
+
+	mbox, err := u.GetMailbox(name)
+	if err != nil {
+		return err
+	}
+
+	flags := ctx.StringSlice("flag")
+	if flags == nil {
+		flags = []string{}
+	}
+
+	date := time.Now()
+	if ctx.IsSet("date") {
+		date = time.Unix(ctx.Int64("date"), 0)
+	}
+
+	buf := bytes.Buffer{}
+	if _, err := io.Copy(&buf, os.Stdin); err != nil {
+		return err
+	}
+
+	if buf.Len() == 0 {
+		return errors.New("Error: Empty message, refusing to continue")
+	}
+
+	status, err := mbox.Status([]eimap.StatusItem{eimap.StatusUidNext})
+	if err != nil {
+		return err
+	}
+
+	if err := mbox.CreateMessage(flags, date, &buf); err != nil {
+		return err
+	}
+
+	fmt.Println(status.UidNext)
+
+	return nil
+}
+
+func msgsRemove(ctx *cli.Context) error {
+	if err := connectToDB(ctx); err != nil {
+		return err
+	}
+
+	if !ctx.GlobalBool("unsafe") {
+		return errors.New("Error: Refusing to edit mailboxes without --unsafe")
+	}
+
+	username := ctx.Args().First()
+	if username == "" {
+		return errors.New("Error: USERNAME is required")
+	}
+	name := ctx.Args().Get(1)
+	if name == "" {
+		return errors.New("Error: MAILBOX is required")
+	}
+	seqset := ctx.Args().Get(2)
+	if seqset == "" {
+		return errors.New("Error: SEQSET is required")
+	}
+
+	seq, err := eimap.ParseSeqSet(seqset)
+	if err != nil {
+		return err
+	}
+
+	u, err := backend.GetUser(username)
+	if err != nil {
+		return err
+	}
+
+	mbox, err := u.GetMailbox(name)
+	if err != nil {
+		return err
+	}
+
+	if !ctx.Bool("yes") {
+		if !Confirmation("Are you sure you want to delete these messages?", false) {
+			return errors.New("Cancelled")
+		}
+	}
+
+	mboxB := mbox.(*imapsql.Mailbox)
+	if err := mboxB.DelMessages(ctx.Bool("uid"), seq); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func msgsCopy(ctx *cli.Context) error {
+	if err := connectToDB(ctx); err != nil {
+		return err
+	}
+
+	if !ctx.GlobalBool("unsafe") {
+		return errors.New("Error: Refusing to edit mailboxes without --unsafe")
+	}
+
+	username := ctx.Args().First()
+	if username == "" {
+		return errors.New("Error: USERNAME is required")
+	}
+	srcName := ctx.Args().Get(1)
+	if srcName == "" {
+		return errors.New("Error: SRCMAILBOX is required")
+	}
+	seqset := ctx.Args().Get(2)
+	if seqset == "" {
+		return errors.New("Error: SEQSET is required")
+	}
+	tgtName := ctx.Args().Get(3)
+	if tgtName == "" {
+		return errors.New("Error: TGTMAILBOX is required")
+	}
+
+	seq, err := eimap.ParseSeqSet(seqset)
+	if err != nil {
+		return err
+	}
+
+	u, err := backend.GetUser(username)
+	if err != nil {
+		return err
+	}
+
+	srcMbox, err := u.GetMailbox(srcName)
+	if err != nil {
+		return err
+	}
+
+	return srcMbox.CopyMessages(ctx.Bool("uid"), seq, tgtName)
+}
+
+func msgsMove(ctx *cli.Context) error {
+	if err := connectToDB(ctx); err != nil {
+		return err
+	}
+
+	if !ctx.GlobalBool("unsafe") {
+		return errors.New("Error: Refusing to edit mailboxes without --unsafe")
+	}
+
+	username := ctx.Args().First()
+	if username == "" {
+		return errors.New("Error: USERNAME is required")
+	}
+	srcName := ctx.Args().Get(1)
+	if srcName == "" {
+		return errors.New("Error: SRCMAILBOX is required")
+	}
+	seqset := ctx.Args().Get(2)
+	if seqset == "" {
+		return errors.New("Error: SEQSET is required")
+	}
+	tgtName := ctx.Args().Get(3)
+	if tgtName == "" {
+		return errors.New("Error: TGTMAILBOX is required")
+	}
+
+	seq, err := eimap.ParseSeqSet(seqset)
+	if err != nil {
+		return err
+	}
+
+	u, err := backend.GetUser(username)
+	if err != nil {
+		return err
+	}
+
+	srcMbox, err := u.GetMailbox(srcName)
+	if err != nil {
+		return err
+	}
+
+	moveMbox := srcMbox.(*imapsql.Mailbox)
+
+	return moveMbox.MoveMessages(ctx.Bool("uid"), seq, tgtName)
+}
+
+func msgsList(ctx *cli.Context) error {
+	if err := connectToDB(ctx); err != nil {
+		return err
+	}
+
+	username := ctx.Args().First()
+	if username == "" {
+		return errors.New("Error: USERNAME is required")
+	}
+	mboxName := ctx.Args().Get(1)
+	if mboxName == "" {
+		return errors.New("Error: MAILBOX is required")
+	}
+	seqset := ctx.Args().Get(2)
+	if seqset == "" {
+		seqset = "*"
+	}
+
+	seq, err := eimap.ParseSeqSet(seqset)
+	if err != nil {
+		return err
+	}
+
+	u, err := backend.GetUser(username)
+	if err != nil {
+		return err
+	}
+
+	mbox, err := u.GetMailbox(mboxName)
+	if err != nil {
+		return err
+	}
+
+	ch := make(chan *eimap.Message, 10)
+	go func() {
+		err = mbox.ListMessages(ctx.Bool("uid"), seq, []eimap.FetchItem{eimap.FetchEnvelope, eimap.FetchInternalDate, eimap.FetchRFC822Size, eimap.FetchFlags, eimap.FetchUid}, ch)
+	}()
+
+	for msg := range ch {
+		if !ctx.Bool("full") {
+			fmt.Printf("UID %d: %s - %s\n  %v, %v\n\n", msg.Uid, FormatAddressList(msg.Envelope.From), msg.Envelope.Subject, msg.Flags, msg.Envelope.Date)
+			continue
+		}
+
+		fmt.Println("- Server meta-data:")
+		fmt.Println("UID:", msg.Uid)
+		fmt.Println("Sequence number:", msg.SeqNum)
+		fmt.Println("Flags:", msg.Flags)
+		fmt.Println("Body size:", msg.Size)
+		fmt.Println("Internal date:", msg.InternalDate.Unix(), msg.InternalDate)
+		fmt.Println("- Envelope:")
+		if len(msg.Envelope.From) != 0 {
+			fmt.Println("From:", FormatAddressList(msg.Envelope.From))
+		}
+		if len(msg.Envelope.To) != 0 {
+			fmt.Println("To:", FormatAddressList(msg.Envelope.To))
+		}
+		if len(msg.Envelope.Cc) != 0 {
+			fmt.Println("CC:", FormatAddressList(msg.Envelope.Cc))
+		}
+		if len(msg.Envelope.Bcc) != 0 {
+			fmt.Println("BCC:", FormatAddressList(msg.Envelope.Bcc))
+		}
+		if msg.Envelope.InReplyTo != "" {
+			fmt.Println("In-Reply-To:", msg.Envelope.InReplyTo)
+		}
+		if msg.Envelope.MessageId != "" {
+			fmt.Println("Message-Id:", msg.Envelope.MessageId)
+		}
+		if !msg.Envelope.Date.IsZero() {
+			fmt.Println("Date:", msg.Envelope.Date.Unix(), msg.Envelope.Date)
+		}
+		if msg.Envelope.Subject != "" {
+			fmt.Println("Subject:", msg.Envelope.Subject)
+		}
+		fmt.Println()
+	}
+	return err
+}
+
+func msgsDump(ctx *cli.Context) error {
+	if err := connectToDB(ctx); err != nil {
+		return err
+	}
+
+	username := ctx.Args().First()
+	if username == "" {
+		return errors.New("Error: USERNAME is required")
+	}
+	mboxName := ctx.Args().Get(1)
+	if mboxName == "" {
+		return errors.New("Error: MAILBOX is required")
+	}
+	seqset := ctx.Args().Get(2)
+	if seqset == "" {
+		seqset = "*"
+	}
+
+	seq, err := eimap.ParseSeqSet(seqset)
+	if err != nil {
+		return err
+	}
+
+	u, err := backend.GetUser(username)
+	if err != nil {
+		return err
+	}
+
+	mbox, err := u.GetMailbox(mboxName)
+	if err != nil {
+		return err
+	}
+
+	ch := make(chan *eimap.Message, 10)
+	go func() {
+		err = mbox.ListMessages(ctx.Bool("uid"), seq, []eimap.FetchItem{eimap.FetchRFC822}, ch)
+	}()
+
+	for msg := range ch {
+		for _, v := range msg.Body {
+			if _, err := io.Copy(os.Stdout, v); err != nil {
+				return err
+			}
+		}
+	}
+	return err
+}

cmd/imapsql-ctl/mysql.go

@@ -0,0 +1,3 @@
+package main
+
+import _ "github.com/go-sql-driver/mysql"

cmd/imapsql-ctl/postgresql.go

@@ -0,0 +1,3 @@
+package main
+
+import _ "github.com/lib/pq"

cmd/imapsql-ctl/sqlite3.go

@@ -0,0 +1,5 @@
+// +build cgo
+
+package main
+
+import _ "github.com/mattn/go-sqlite3"

cmd/imapsql-ctl/termios.go

@@ -0,0 +1,63 @@
+//+build linux
+
+package main
+
+// Copied from github.com/foxcpp/ttyprompt
+// Commit 087a574, terminal/termios.go
+
+import (
+	"errors"
+	"os"
+	"syscall"
+	"unsafe"
+)
+
+type Termios struct {
+	Iflag  uint32
+	Oflag  uint32
+	Cflag  uint32
+	Lflag  uint32
+	Cc     [20]byte
+	Ispeed uint32
+	Ospeed uint32
+}
+
+/*
+TurnOnRawIO sets flags suitable for raw I/O (no echo, per-character input, etc)
+and returns original flags.
+*/
+func TurnOnRawIO(tty *os.File) (orig Termios, err error) {
+	termios, err := TcGetAttr(tty.Fd())
+	if err != nil {
+		return Termios{}, errors.New("TurnOnRawIO: failed to get flags: " + err.Error())
+	}
+	termiosOrig := *termios
+
+	termios.Lflag &^= syscall.ECHO
+	termios.Lflag &^= syscall.ICANON
+	termios.Iflag &^= syscall.IXON
+	termios.Lflag &^= syscall.ISIG
+	termios.Iflag |= syscall.IUTF8
+	err = TcSetAttr(tty.Fd(), termios)
+	if err != nil {
+		return Termios{}, errors.New("TurnOnRawIO: flags to set flags: " + err.Error())
+	}
+	return termiosOrig, nil
+}
+
+func TcSetAttr(fd uintptr, termios *Termios) error {
+	_, _, err := syscall.Syscall(syscall.SYS_IOCTL, fd, syscall.TCSETS, uintptr(unsafe.Pointer(termios)))
+	if err != 0 {
+		return err
+	}
+	return nil
+}
+
+func TcGetAttr(fd uintptr) (*Termios, error) {
+	termios := &Termios{}
+	_, _, err := syscall.Syscall(syscall.SYS_IOCTL, fd, syscall.TCGETS, uintptr(unsafe.Pointer(termios)))
+	if err != 0 {
+		return nil, err
+	}
+	return termios, nil
+}

cmd/imapsql-ctl/termios_stub.go

@@ -0,0 +1,30 @@
+//+build !linux
+
+package main
+
+import (
+	"errors"
+	"os"
+)
+
+type Termios struct {
+	Iflag  uint32
+	Oflag  uint32
+	Cflag  uint32
+	Lflag  uint32
+	Cc     [20]byte
+	Ispeed uint32
+	Ospeed uint32
+}
+
+func TurnOnRawIO(tty *os.File) (orig Termios, err error) {
+	return Termios{}, errors.New("not implemented")
+}
+
+func TcSetAttr(fd uintptr, termios *Termios) error {
+	return errors.New("not implemented")
+}
+
+func TcGetAttr(fd uintptr) (*Termios, error) {
+	return nil, errors.New("not implemented")
+}

cmd/imapsql-ctl/users.go

@@ -0,0 +1,189 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+	"os"
+
+	"github.com/urfave/cli"
+	"golang.org/x/crypto/bcrypt"
+)
+
+func usersList(ctx *cli.Context) error {
+	if err := connectToDB(ctx); err != nil {
+		return err
+	}
+
+	list, err := backend.ListUsers()
+	if err != nil {
+		return err
+	}
+
+	if len(list) == 0 && !ctx.GlobalBool("quiet") {
+		fmt.Fprintln(os.Stderr, "No users.")
+	}
+
+	for _, user := range list {
+		fmt.Println(user)
+	}
+	return nil
+}
+
+func usersCreate(ctx *cli.Context) error {
+	if err := connectToDB(ctx); err != nil {
+		return err
+	}
+
+	username := ctx.Args().First()
+	if username == "" {
+		return errors.New("Error: USERNAME is required")
+	}
+
+	_, err := backend.GetUser(username)
+	if err == nil {
+		return errors.New("Error: User already exists")
+	}
+
+	if ctx.IsSet("null") {
+		return backend.CreateUserNoPass(username)
+	}
+
+	if ctx.IsSet("hash") {
+		backend.Opts.DefaultHashAlgo = ctx.String("hash")
+	}
+	if ctx.IsSet("bcrypt-cost") {
+		if ctx.Int("bcrypt-cost") > bcrypt.MaxCost {
+			return errors.New("Error: too big bcrypt cost")
+		}
+		if ctx.Int("bcrypt-cost") < bcrypt.MinCost {
+			return errors.New("Error: too small bcrypt cost")
+		}
+		backend.Opts.BcryptCost = ctx.Int("bcrypt-cost")
+	}
+
+	var pass string
+	if ctx.IsSet("password") {
+		pass = ctx.String("password,p")
+	} else {
+		pass, err = ReadPassword("Enter password for new user")
+		if err != nil {
+			return err
+		}
+	}
+
+	return backend.CreateUser(username, pass)
+}
+
+func usersRemove(ctx *cli.Context) error {
+	if err := connectToDB(ctx); err != nil {
+		return err
+	}
+
+	if !ctx.GlobalBool("unsafe") {
+		return errors.New("Error: Refusing to edit mailboxes without --unsafe")
+	}
+
+	username := ctx.Args().First()
+	if username == "" {
+		return errors.New("Error: USERNAME is required")
+	}
+
+	_, err := backend.GetUser(username)
+	if err != nil {
+		return errors.New("Error: User doesn't exists")
+	}
+
+	if !ctx.Bool("yes") {
+		if !Confirmation("Are you sure you want to delete this user account?", false) {
+			return errors.New("Cancelled")
+		}
+	}
+
+	return backend.DeleteUser(username)
+}
+
+func usersPassword(ctx *cli.Context) error {
+	if err := connectToDB(ctx); err != nil {
+		return err
+	}
+
+	username := ctx.Args().First()
+	if username == "" {
+		return errors.New("Error: USERNAME is required")
+	}
+
+	_, err := backend.GetUser(username)
+	if err != nil {
+		return errors.New("Error: User doesn't exists")
+	}
+
+	if ctx.IsSet("null") {
+		return backend.ResetPassword(username)
+	}
+
+	if ctx.IsSet("hash") {
+		backend.Opts.DefaultHashAlgo = ctx.String("hash")
+	}
+	if ctx.IsSet("bcrypt-cost") {
+		if ctx.Int("bcrypt-cost") > bcrypt.MaxCost {
+			return errors.New("Error: too big bcrypt cost")
+		}
+		if ctx.Int("bcrypt-cost") < bcrypt.MinCost {
+			return errors.New("Error: too small bcrypt cost")
+		}
+		backend.Opts.BcryptCost = ctx.Int("bcrypt-cost")
+	}
+
+	var pass string
+	if ctx.IsSet("password") {
+		pass = ctx.String("password")
+	} else {
+		pass, err = ReadPassword("Enter new password")
+		if err != nil {
+			return err
+		}
+	}
+
+	return backend.SetUserPassword(username, pass)
+}
+
+func usersAppendLimit(ctx *cli.Context) error {
+	if err := connectToDB(ctx); err != nil {
+		return err
+	}
+
+	username := ctx.Args().First()
+	if username == "" {
+		return errors.New("Error: USERNAME is required")
+	}
+
+	u, err := backend.GetUser(username)
+	if err != nil {
+		return err
+	}
+	userAL := u.(AppendLimitUser)
+
+	if ctx.IsSet("value") {
+		val := ctx.Int("value")
+
+		var err error
+		if val == -1 {
+			err = userAL.SetMessageLimit(nil)
+		} else {
+			val32 := uint32(val)
+			err = userAL.SetMessageLimit(&val32)
+		}
+		if err != nil {
+			return err
+		}
+	} else {
+		lim := userAL.CreateMessageLimit()
+		if lim == nil {
+			fmt.Println("No limit")
+		} else {
+			fmt.Println(*lim)
+		}
+	}
+
+	return nil
+}

cmd/imapsql-ctl/utils.go

@@ -0,0 +1,111 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/emersion/go-imap"
+	eimap "github.com/emersion/go-imap"
+)
+
+func FormatAddress(addr *eimap.Address) string {
+	return fmt.Sprintf("%s <%s@%s>", addr.PersonalName, addr.MailboxName, addr.HostName)
+}
+
+func FormatAddressList(addrs []*imap.Address) string {
+	res := make([]string, 0, len(addrs))
+	for _, addr := range addrs {
+		res = append(res, FormatAddress(addr))
+	}
+	return strings.Join(res, ", ")
+}
+
+func Confirmation(prompt string, def bool) bool {
+	selection := "y/N"
+	if def {
+		selection = "Y/n"
+	}
+
+	fmt.Fprintf(os.Stderr, "%s [%s]: ", prompt, selection)
+	if !stdinScnr.Scan() {
+		fmt.Fprintln(os.Stderr, stdinScnr.Err())
+		return false
+	}
+
+	switch stdinScnr.Text() {
+	case "Y", "y":
+		return true
+	case "N", "n":
+		return false
+	default:
+		return def
+	}
+}
+
+func readPass(tty *os.File, output []byte) ([]byte, error) {
+	cursor := output[0:1]
+	readen := 0
+	for {
+		n, err := tty.Read(cursor)
+		if n != 1 {
+			return nil, errors.New("ReadPassword: invalid read size when not in canonical mode")
+		}
+		if err != nil {
+			return nil, errors.New("ReadPassword: " + err.Error())
+		}
+		if cursor[0] == '\n' {
+			break
+		}
+		// Esc or Ctrl+D or Ctrl+C.
+		if cursor[0] == '\x1b' || cursor[0] == '\x04' || cursor[0] == '\x03' {
+			return nil, errors.New("ReadPassword: prompt rejected")
+		}
+		if cursor[0] == '\x7F' /* DEL */ {
+			if readen != 0 {
+				readen--
+				cursor = output[readen : readen+1]
+			}
+			continue
+		}
+
+		if readen == cap(output) {
+			return nil, errors.New("ReadPassword: too long password")
+		}
+
+		readen++
+		cursor = output[readen : readen+1]
+	}
+
+	return output[0:readen], nil
+}
+
+func ReadPassword(prompt string) (string, error) {
+	termios, err := TurnOnRawIO(os.Stdin)
+	hiddenPass := true
+	if err != nil {
+		hiddenPass = false
+		fmt.Fprintln(os.Stderr, "Failed to disable terminal output:", err)
+	}
+	defer TcSetAttr(os.Stdin.Fd(), &termios)
+
+	fmt.Fprintf(os.Stderr, "%s: ", prompt)
+
+	if hiddenPass {
+		buf := make([]byte, 512)
+		buf, err = readPass(os.Stdin, buf)
+		if err != nil {
+			return "", err
+		}
+		fmt.Println()
+
+		return string(buf), nil
+	} else {
+		if !stdinScnr.Scan() {
+			return "", stdinScnr.Err()
+		}
+
+		return stdinScnr.Text(), nil
+	}
+}

cmd/imapsql-ctl/version.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+	"fmt"
+	"runtime/debug"
+)
+
+const Version = "unknown (built from source tree)"
+
+func buildInfo() string {
+	if info, ok := debug.ReadBuildInfo(); ok {
+		imapsqlVer := "unknown"
+		for _, dep := range info.Deps {
+			if dep.Path == "github.com/foxcpp/go-imap-sql" {
+				imapsqlVer = dep.Version
+			}
+		}
+
+		if info.Main.Version == "(devel)" {
+			return fmt.Sprintf("%s for maddy %s", imapsqlVer, Version)
+		}
+		return fmt.Sprintf("%s for maddy %s %s", imapsqlVer, info.Main.Version, info.Main.Sum)
+	}
+	return fmt.Sprintf("unknown for maddy %s (GOPATH build)", Version)
+}

go.mod

@@ -21,7 +21,8 @@ require (
 	github.com/lib/pq v1.2.0
 	github.com/mattn/go-sqlite3 v1.11.0
 	github.com/stretchr/testify v1.4.0 // indirect
-	golang.org/x/crypto v0.0.0-20190911031432-227b76d455e7 // indirect
+	github.com/urfave/cli v1.20.0
+	golang.org/x/crypto v0.0.0-20190911031432-227b76d455e7
 	golang.org/x/sys v0.0.0-20190919044723-0c1ff786ef13 // indirect
 	google.golang.org/appengine v1.6.2 // indirect
 	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect

storage/sql/bench_test.go

@@ -36,8 +36,7 @@ func createTestDB(tb testing.TB, compAlgo string) *Storage {
 		tb.Fatal(err)
 	}
 	return &Storage{
-		back:     db,
-		hostname: "test.example.org",
+		Back: db,
 	}
 }
 

storage/sql/sql.go

@@ -36,7 +36,7 @@ import (
 )
 
 type Storage struct {
-	back     *imapsql.Backend
+	Back     *imapsql.Backend
 	instName string
 	Log      log.Logger
 
@@ -44,7 +44,6 @@ type Storage struct {
 	authPerDomain    bool
 	authDomains      []string
 	junkMbox         string
-	hostname         string
 
 	resolver dns.Resolver
 }
@@ -127,7 +126,7 @@ func (store *Storage) Start(msgMeta *module.MsgMetadata, mailFrom string) (modul
 		store:      store,
 		msgMeta:    msgMeta,
 		mailFrom:   mailFrom,
-		d:          store.back.NewDelivery(),
+		d:          store.Back.NewDelivery(),
 		addedRcpts: map[string]struct{}{},
 	}, nil
 }
@@ -192,7 +191,6 @@ func (store *Storage) Init(cfg *config.Map) error {
 	cfg.Int("sqlite3_busy_timeout", false, false, 0, &opts.BusyTimeout)
 	cfg.Bool("sqlite3_exclusive_lock", false, false, &opts.ExclusiveLock)
 	cfg.String("junk_mailbox", false, false, "Junk", &store.junkMbox)
-	cfg.String("hostname", true, true, "", &store.hostname)
 
 	if _, err := cfg.Process(); err != nil {
 		return err
@@ -253,7 +251,7 @@ func (store *Storage) Init(cfg *config.Map) error {
 		}
 	}
 
-	store.back, err = imapsql.New(driver, dsnStr, extStore, opts)
+	store.Back, err = imapsql.New(driver, dsnStr, extStore, opts)
 	if err != nil {
 		return fmt.Errorf("sql: %s", err)
 	}
@@ -268,11 +266,11 @@ func (store *Storage) IMAPExtensions() []string {
 }
 
 func (store *Storage) Updates() <-chan backend.Update {
-	return store.back.Updates()
+	return store.Back.Updates()
 }
 
 func (store *Storage) EnableChildrenExt() bool {
-	return store.back.EnableChildrenExt()
+	return store.Back.EnableChildrenExt()
 }
 
 func (store *Storage) CheckPlain(username, password string) bool {
@@ -281,7 +279,7 @@ func (store *Storage) CheckPlain(username, password string) bool {
 		return false
 	}
 
-	return store.back.CheckPlain(accountName, password)
+	return store.Back.CheckPlain(accountName, password)
 }
 
 func (store *Storage) GetOrCreateUser(username string) (backend.User, error) {
@@ -296,7 +294,7 @@ func (store *Storage) GetOrCreateUser(username string) (backend.User, error) {
 		accountName = parts[0]
 	}
 
-	return store.back.GetOrCreateUser(accountName)
+	return store.Back.GetOrCreateUser(accountName)
 }
 
 func init() {