more doc, fix format str

- add ANYDB_PASSWORD env var
- add config file support, including buckets dict
- finalized custom bucket support
- fine tuned info support

Makefile

@@ -66,11 +66,11 @@ clean:
 	rm -rf $(tool) releases coverage.out
 
 test:
-	go test -v ./...
+	ANYDB_PASSWORD=test go test -v ./...
 
 singletest:
 	@echo "Call like this: ''make singletest TEST=TestPrepareColumns MOD=lib"
-	go test -run $(TEST) github.com/tlinden/anydb/$(MOD)
+	ANYDB_PASSWORD=test go test -run $(TEST) github.com/tlinden/anydb/$(MOD)
 
 cover-report:
 	go test ./... -cover -coverprofile=coverage.out

README.md

@@ -95,9 +95,29 @@ anydb import -r backup.json
 
 # you can encrypt entries. anydb asks for a passphrase
 # and will do the same when you retrieve the key using the
-# get command.
+# get command. anydb will ask you interactively for a password
 anydb set mypassword -e
 
+# but you can provide it via an environment variable too
+ANYDB_PASSWORD=foo anydb set -e secretkey blahblah
+
+# too tiresome to add -e every time you add an entry?
+# use a per bucket config
+cat ~/.config/anydb/anydb.toml
+[buckets.data]
+encrypt = true
+anydb set foo bar # will be encrypted
+
+# speaking of buckets, you can use different buckets
+anydb -b test set foo bar
+
+# and speaking of configs, you can place a config file at these places:
+# ~/.config/anydb/anydb.toml
+# ~/.anydb.toml
+# anydb.toml (current directory)
+# or specify one using -c <filename>
+# look at example.toml
+
 # using template output mode you can freely design how to print stuff
 # here, we print the values in CSV format ONLY if they have some tag
 anydb ls -m template -T "{{ if .Tags }}{{ .Key }},{{ .Value }},{{ .Created}}{{ end }}"
@@ -125,6 +145,10 @@ curl localhost:8787/anydb/v1/foo
 # list keys
 curl localhost:8787/anydb/v1/
 
+# sometimes you need to know some details about the current database
+# add -d for more details
+anydb info
+
 # it comes with a manpage builtin
 anydb man
 ```

TODO.md

@@ -1,4 +1,3 @@
 - repl
 - mime-type => exec app + value
-- custom buckets (like skate: key@bucket or key+bucket)
-- encryption per bucket, one key for all entries (in that bucket)
+- [edit command](https://github.com/TLINDEN/rpnc/blob/master/command.go#L249)

anydb.1

@@ -1,4 +1,4 @@
-.\" Automatically generated by Pod::Man 4.14 (Pod::Simple 3.40)
+.\" Automatically generated by Pod::Man 4.14 (Pod::Simple 3.42)
 .\"
 .\" Standard preamble:
 .\" ========================================================================
@@ -133,7 +133,7 @@
 .\" ========================================================================
 .\"
 .IX Title "ANYDB 1"
-.TH ANYDB 1 "2024-12-18" "1" "User Commands"
+.TH ANYDB 1 "2024-12-22" "1" "User Commands"
 .\" For nroff, turn off justification.  Always turn off hyphenation; it makes
 .\" way too many mistakes in technical documents.
 .if n .ad l

app/db.go

@@ -34,6 +34,7 @@ const MaxValueWidth int = 60
 type DB struct {
 	Debug  bool
 	Dbfile string
+	Bucket string
 	DB     *bolt.DB
 }
 
@@ -48,6 +49,19 @@ type DbEntry struct {
 	Size      int
 }
 
+type BucketInfo struct {
+	Name     string
+	Keys     int
+	Size     int
+	Sequence uint64
+	Stats    bolt.BucketStats
+}
+
+type DbInfo struct {
+	Buckets []BucketInfo
+	Path    string
+}
+
 // Post process an entry for list output.
 // Do NOT call it during write processing!
 func (entry *DbEntry) Normalize() {
@@ -75,8 +89,8 @@ type DbTag struct {
 
 const BucketData string = "data"
 
-func New(file string, debug bool) (*DB, error) {
-	return &DB{Debug: debug, Dbfile: file}, nil
+func New(file string, bucket string, debug bool) (*DB, error) {
+	return &DB{Debug: debug, Dbfile: file, Bucket: bucket}, nil
 }
 
 func (db *DB) Open() error {
@@ -114,7 +128,7 @@ func (db *DB) List(attr *DbAttr) (DbEntries, error) {
 
 	err := db.DB.View(func(tx *bolt.Tx) error {
 
-		bucket := tx.Bucket([]byte(BucketData))
+		bucket := tx.Bucket([]byte(db.Bucket))
 		if bucket == nil {
 			return nil
 		}
@@ -182,7 +196,7 @@ func (db *DB) Set(attr *DbAttr) error {
 	// any  tags. if so,  we initialize  our update struct  with these
 	// tags unless it has new tags configured.
 	err := db.DB.View(func(tx *bolt.Tx) error {
-		bucket := tx.Bucket([]byte(BucketData))
+		bucket := tx.Bucket([]byte(db.Bucket))
 		if bucket == nil {
 			return nil
 		}
@@ -211,7 +225,7 @@ func (db *DB) Set(attr *DbAttr) error {
 
 	err = db.DB.Update(func(tx *bolt.Tx) error {
 		// insert data
-		bucket, err := tx.CreateBucketIfNotExists([]byte(BucketData))
+		bucket, err := tx.CreateBucketIfNotExists([]byte(db.Bucket))
 		if err != nil {
 			return fmt.Errorf("failed to create DB bucket: %w", err)
 		}
@@ -245,13 +259,14 @@ func (db *DB) Get(attr *DbAttr) (*DbEntry, error) {
 	entry := DbEntry{}
 
 	err := db.DB.View(func(tx *bolt.Tx) error {
-		bucket := tx.Bucket([]byte(BucketData))
+		bucket := tx.Bucket([]byte(db.Bucket))
 		if bucket == nil {
 			return nil
 		}
 
 		jsonentry := bucket.Get([]byte(attr.Key))
 		if jsonentry == nil {
+			// FIXME: shall we return a key not found error?
 			return nil
 		}
 
@@ -277,7 +292,7 @@ func (db *DB) Del(attr *DbAttr) error {
 	defer db.Close()
 
 	err := db.DB.Update(func(tx *bolt.Tx) error {
-		bucket := tx.Bucket([]byte(BucketData))
+		bucket := tx.Bucket([]byte(db.Bucket))
 
 		if bucket == nil {
 			return nil
@@ -289,14 +304,14 @@ func (db *DB) Del(attr *DbAttr) error {
 	return err
 }
 
-func (db *DB) Import(attr *DbAttr) error {
+func (db *DB) Import(attr *DbAttr) (string, error) {
 	// open json file into attr.Val
 	if err := attr.GetFileValue(); err != nil {
-		return err
+		return "", err
 	}
 
 	if attr.Val == "" {
-		return errors.New("empty json file")
+		return "", errors.New("empty json file")
 	}
 
 	var entries DbEntries
@@ -304,27 +319,27 @@ func (db *DB) Import(attr *DbAttr) error {
 	newfile := db.Dbfile + now.Format("-02.01.2006T03:04.05")
 
 	if err := json.Unmarshal([]byte(attr.Val), &entries); err != nil {
-		return cleanError(newfile, fmt.Errorf("failed to unmarshal json: %w", err))
+		return "", cleanError(newfile, fmt.Errorf("failed to unmarshal json: %w", err))
 	}
 
 	if fileExists(db.Dbfile) {
 		// backup the old file
 		err := os.Rename(db.Dbfile, newfile)
 		if err != nil {
-			return fmt.Errorf("failed to rename file %s to %s: %w", db.Dbfile, newfile, err)
+			return "", fmt.Errorf("failed to rename file %s to %s: %w", db.Dbfile, newfile, err)
 		}
 
 	}
 
 	// should now be a new db file
 	if err := db.Open(); err != nil {
-		return cleanError(newfile, err)
+		return "", cleanError(newfile, err)
 	}
 	defer db.Close()
 
 	err := db.DB.Update(func(tx *bolt.Tx) error {
 		// insert data
-		bucket, err := tx.CreateBucketIfNotExists([]byte(BucketData))
+		bucket, err := tx.CreateBucketIfNotExists([]byte(db.Bucket))
 		if err != nil {
 			return fmt.Errorf("failed to create bucket: %w", err)
 		}
@@ -345,28 +360,53 @@ func (db *DB) Import(attr *DbAttr) error {
 	})
 
 	if err != nil {
-		return cleanError(newfile, err)
+		return "", cleanError(newfile, err)
 	}
 
-	fmt.Printf("backed up database file to %s\n", newfile)
-	fmt.Printf("imported %d database entries\n", len(entries))
+	return fmt.Sprintf("backed up database file to %s\nimported %d database entries\n",
+		newfile, len(entries)), nil
+}
+
+func (db *DB) Info() (*DbInfo, error) {
+	if err := db.Open(); err != nil {
+		return nil, err
+	}
+	defer db.Close()
+
+	info := &DbInfo{Path: db.Dbfile}
+
+	err := db.DB.View(func(tx *bolt.Tx) error {
+		err := tx.ForEach(func(name []byte, bucket *bolt.Bucket) error {
+			stats := bucket.Stats()
+
+			binfo := BucketInfo{
+				Name:     string(name),
+				Sequence: bucket.Sequence(),
+				Keys:     stats.KeyN,
+				Stats:    bucket.Stats(),
+			}
+
+			err := bucket.ForEach(func(key, entry []byte) error {
+				binfo.Size += len(entry) + len(key)
 
 				return nil
+			})
+			if err != nil {
+				return fmt.Errorf("failed to read keys: %w", err)
 			}
 
-func cleanError(file string, err error) error {
-	// remove given [backup] file and forward the given error
-	os.Remove(file)
-	return err
-}
+			info.Buckets = append(info.Buckets, binfo)
+			return nil
 
-func fileExists(filename string) bool {
-	info, err := os.Stat(filename)
+		})
 
 		if err != nil {
-		// return false on any error
-		return false
+			return fmt.Errorf("failed to read from DB: %w", err)
 		}
 
-	return !info.IsDir()
+		return nil
+
+	})
+
+	return info, err
 }

app/io.go

@@ -0,0 +1,36 @@
+/*
+Copyright © 2024 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+package app
+
+import "os"
+
+func cleanError(file string, err error) error {
+	// remove given [backup] file and forward the given error
+	os.Remove(file)
+	return err
+}
+
+func fileExists(filename string) bool {
+	info, err := os.Stat(filename)
+
+	if err != nil {
+		// return false on any error
+		return false
+	}
+
+	return !info.IsDir()
+}

cfg/config.go

@@ -1,19 +1,114 @@
+/*
+Copyright © 2024 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
 package cfg
 
-import "github.com/tlinden/anydb/app"
+import (
+	"fmt"
+	"io"
+	"os"
 
-var Version string = "v0.0.4"
+	"github.com/pelletier/go-toml"
+	"github.com/tlinden/anydb/app"
+	"github.com/tlinden/anydb/common"
+)
+
+var Version string = "v0.0.5"
+
+type BucketConfig struct {
+	Encrypt bool
+}
 
 type Config struct {
 	Debug      bool
 	Dbfile     string
+	Dbbucket   string
 	Template   string
 	Mode       string // wide, table, yaml, json
 	NoHeaders  bool
 	NoHumanize bool
-	Encrypt    bool
-	DB         *app.DB
-	File       string
-	Tags       []string
+	Encrypt    bool // one entry
 	Listen     string
+	Buckets    map[string]BucketConfig // config file only
+
+	Tags []string // internal
+	DB   *app.DB  // internal
+	File string   // internal
+}
+
+func (conf *Config) GetConfig(files []string) error {
+	for _, file := range files {
+		if err := conf.ParseConfigFile(file); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (conf *Config) ParseConfigFile(file string) error {
+	if !common.FileExists(file) {
+		return nil
+	}
+
+	fd, err := os.OpenFile(file, os.O_RDONLY, 0600)
+	if err != nil {
+		return fmt.Errorf("failed to open config file %s: %w", file, err)
+	}
+
+	data, err := io.ReadAll(fd)
+	if err != nil {
+		return fmt.Errorf("failed to read from config file: %w", err)
+	}
+
+	add := Config{}
+	err = toml.Unmarshal(data, &add)
+	if err != nil {
+		return fmt.Errorf("failed to unmarshall toml: %w", err)
+	}
+
+	// merge new values into existing config
+	switch {
+	case add.Debug != conf.Debug:
+		conf.Debug = add.Debug
+	case add.Dbfile != "":
+		conf.Dbfile = add.Dbfile
+	case add.Dbbucket != "":
+		conf.Dbbucket = add.Dbbucket
+	case add.Template != "":
+		conf.Template = add.Template
+	case add.NoHeaders != conf.NoHeaders:
+		conf.NoHeaders = add.NoHeaders
+	case add.NoHumanize != conf.NoHumanize:
+		conf.NoHumanize = add.NoHumanize
+	case add.Encrypt != conf.Encrypt:
+		conf.Encrypt = add.Encrypt
+	case add.Listen != "":
+		conf.Listen = add.Listen
+	}
+
+	// only supported in config files
+	conf.Buckets = add.Buckets
+
+	// determine bucket encryption mode
+	for name, bucket := range conf.Buckets {
+		if name == conf.Dbbucket {
+			conf.Encrypt = bucket.Encrypt
+		}
+	}
+
+	return nil
 }

cmd/crud.go

@@ -65,7 +65,7 @@ func Set(conf *cfg.Config) *cobra.Command {
 
 			// encrypt?
 			if conf.Encrypt {
-				pass, err := app.AskForPassword()
+				pass, err := getPassword()
 				if err != nil {
 					return err
 				}
@@ -118,7 +118,7 @@ func Get(conf *cfg.Config) *cobra.Command {
 			}
 
 			if entry.Encrypted {
-				pass, err := app.AskForPassword()
+				pass, err := getPassword()
 				if err != nil {
 					return err
 				}
@@ -279,7 +279,13 @@ func Import(conf *cfg.Config) *cobra.Command {
 			// errors at this stage do not cause the usage to be shown
 			cmd.SilenceUsage = true
 
-			return conf.DB.Import(&attr)
+			out, err := conf.DB.Import(&attr)
+			if err != nil {
+				return err
+			}
+
+			fmt.Print(out)
+			return nil
 		},
 	}
 
@@ -346,3 +352,45 @@ func Serve(conf *cfg.Config) *cobra.Command {
 
 	return cmd
 }
+
+func Info(conf *cfg.Config) *cobra.Command {
+	var cmd = &cobra.Command{
+		Use:   "info",
+		Short: "info",
+		Long:  `show info about database`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			// errors at this stage do not cause the usage to be shown
+			cmd.SilenceUsage = true
+
+			info, err := conf.DB.Info()
+			if err != nil {
+				return err
+			}
+
+			return output.Info(os.Stdout, conf, info)
+		},
+	}
+
+	cmd.PersistentFlags().BoolVarP(&conf.NoHumanize, "no-human", "N", false, "do not translate to human readable values")
+
+	return cmd
+}
+
+func getPassword() ([]byte, error) {
+	var pass []byte
+
+	envpass := os.Getenv("ANYDB_PASSWORD")
+
+	if envpass == "" {
+		readpass, err := app.AskForPassword()
+		if err != nil {
+			return nil, err
+		}
+
+		pass = readpass
+	} else {
+		pass = []byte(envpass)
+	}
+
+	return pass, nil
+}

cmd/root.go

@@ -22,6 +22,7 @@ import (
 	"os"
 	"path/filepath"
 
+	"github.com/alecthomas/repr"
 	"github.com/spf13/cobra"
 	"github.com/tlinden/anydb/app"
 	"github.com/tlinden/anydb/cfg"
@@ -45,22 +46,49 @@ func completion(cmd *cobra.Command, mode string) error {
 func Execute() {
 	var (
 		conf           cfg.Config
+		configfile     string
 		ShowVersion    bool
 		ShowCompletion string
 	)
 
+	home, err := os.UserHomeDir()
+	if err != nil {
+		panic(err)
+	}
+
+	SearchConfigs := []string{
+		filepath.Join(home, ".config", "anydb", "anydb.toml"),
+		filepath.Join(home, ".anydb.toml"),
+		"anydb.toml",
+	}
+
 	var rootCmd = &cobra.Command{
 		Use:   "anydb <command> [options]",
 		Short: "anydb",
 		Long:  `A personal key value store`,
 		PersistentPreRunE: func(cmd *cobra.Command, args []string) error {
-			db, err := app.New(conf.Dbfile, conf.Debug)
+			db, err := app.New(conf.Dbfile, conf.Dbbucket, conf.Debug)
 			if err != nil {
 				return err
 			}
 
 			conf.DB = db
 
+			var configs []string
+			if configfile != "" {
+				configs = []string{configfile}
+			} else {
+				configs = SearchConfigs
+			}
+
+			if err := conf.GetConfig(configs); err != nil {
+				return err
+			}
+
+			if conf.Debug {
+				repr.Println(conf)
+			}
+
 			return nil
 		},
 
@@ -82,16 +110,14 @@ func Execute() {
 		},
 	}
 
-	home, err := os.UserHomeDir()
-	if err != nil {
-		panic(err)
-	}
-
 	// options
 	rootCmd.PersistentFlags().BoolVarP(&ShowVersion, "version", "v", false, "Print program version")
 	rootCmd.PersistentFlags().BoolVarP(&conf.Debug, "debug", "d", false, "Enable debugging")
 	rootCmd.PersistentFlags().StringVarP(&conf.Dbfile, "dbfile", "f",
 		filepath.Join(home, ".config", "anydb", "default.db"), "DB file to use")
+	rootCmd.PersistentFlags().StringVarP(&conf.Dbbucket, "bucket", "b",
+		app.BucketData, "use other bucket (default: "+app.BucketData+")")
+	rootCmd.PersistentFlags().StringVarP(&configfile, "config", "c", "", "toml config file")
 
 	rootCmd.AddCommand(Set(&conf))
 	rootCmd.AddCommand(List(&conf))
@@ -101,6 +127,7 @@ func Execute() {
 	rootCmd.AddCommand(Import(&conf))
 	rootCmd.AddCommand(Serve(&conf))
 	rootCmd.AddCommand(Man(&conf))
+	rootCmd.AddCommand(Info(&conf))
 
 	err = rootCmd.Execute()
 	if err != nil {

common/io.go

@@ -0,0 +1,36 @@
+/*
+Copyright © 2024 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+package common
+
+import "os"
+
+func CleanError(file string, err error) error {
+	// remove given [backup] file and forward the given error
+	os.Remove(file)
+	return err
+}
+
+func FileExists(filename string) bool {
+	info, err := os.Stat(filename)
+
+	if err != nil {
+		// return false on any error
+		return false
+	}
+
+	return !info.IsDir()
+}

example.toml

@@ -0,0 +1,14 @@
+# defaults
+dbfile     = "~/.config/anydb/default.db"
+dbbucket   = "data"
+noheaders  = false
+nohumanize = false
+encrypt    = false
+listen     = "localhost:8787"
+
+# different setups for different buckets
+[buckets.data]
+encrypt = true
+
+[buckets.test]
+encrypt = false

go.mod

@@ -16,6 +16,7 @@ require (
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/mattn/go-runewidth v0.0.15 // indirect
 	github.com/olekukonko/tablewriter v0.0.5 // indirect
+	github.com/pelletier/go-toml v1.9.5 // indirect
 	github.com/rivo/uniseg v0.2.0 // indirect
 	github.com/rogpeppe/go-internal v1.13.1 // indirect
 	github.com/spf13/cobra v1.8.1 // indirect

go.sum

@@ -45,6 +45,8 @@ github.com/mattn/go-runewidth v0.0.15 h1:UNAjwbU9l54TA3KzvqLGxwWjHmMgBUVhBiTjelZ
 github.com/mattn/go-runewidth v0.0.15/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
 github.com/olekukonko/tablewriter v0.0.5 h1:P2Ga83D34wi1o9J6Wh1mRuqd4mF/x/lgBS7N7AbDhec=
 github.com/olekukonko/tablewriter v0.0.5/go.mod h1:hPp6KlRPjbx+hW8ykQs1w3UBbZlj6HuIJcUGPhkA7kY=
+github.com/pelletier/go-toml v1.9.5 h1:4yBQzkHv+7BHq2PQUZF3Mx0IYxG7LsP222s7Agd3ve8=
+github.com/pelletier/go-toml v1.9.5/go.mod h1:u1nR/EPcESfeI/szUZKdtJ0xRNbUoANCkoOuaOx1Y+c=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/rivo/uniseg v0.2.0 h1:S1pD9weZBuJdFmowNwbpi7BJ8TNftyUImj/0WQi72jY=
 github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=

output/single.go

@@ -21,11 +21,14 @@ import (
 	"fmt"
 	"io"
 	"os"
+	"reflect"
 	"strings"
 
+	"github.com/dustin/go-humanize"
 	"github.com/tlinden/anydb/app"
 	"github.com/tlinden/anydb/cfg"
 	"golang.org/x/term"
+	//"github.com/alecthomas/repr"
 )
 
 func Print(writer io.Writer, conf *cfg.Config, attr *app.DbAttr, entry *app.DbEntry) error {
@@ -93,3 +96,36 @@ func WriteFile(writer io.Writer, conf *cfg.Config, attr *app.DbAttr, entry *app.
 
 	return nil
 }
+
+func Info(writer io.Writer, conf *cfg.Config, info *app.DbInfo) error {
+	fmt.Fprintf(writer, "Database: %s\n", info.Path)
+
+	for _, bucket := range info.Buckets {
+		if conf.NoHumanize {
+			fmt.Fprintf(
+				writer,
+				"%19s: %s\n%19s: %d\n%19s: %d\n%19s: %t\n",
+				"Bucket", bucket.Name,
+				"Size", bucket.Size,
+				"Keys", bucket.Keys,
+				"Encrypted", conf.Encrypt)
+		} else {
+			fmt.Fprintf(
+				writer,
+				"%19s: %s\n%19s: %s\n%19s: %d\n",
+				"Bucket", bucket.Name,
+				"Size", humanize.Bytes(uint64(bucket.Size)),
+				"Keys", bucket.Keys)
+		}
+
+		if conf.Debug {
+			val := reflect.ValueOf(&bucket.Stats).Elem()
+			for i := 0; i < val.NumField(); i++ {
+				fmt.Fprintf(writer, "%19s: %v\n", val.Type().Field(i).Name, val.Field(i))
+			}
+		}
+
+		fmt.Fprintln(writer)
+	}
+	return nil
+}