doc/README: changelog for v0.5.0

.gitignore

@@ -1,4 +1,8 @@
 testdata/
-liblcl*
+liblcl-*.zip
+liblcl.so
+liblcl.dll
 yvbolt
 yvbolt.exe
+yvbolt.linux64.tar.xz
+yvbolt.win64.zip

Makefile

@@ -0,0 +1,44 @@
+SHELL:=/bin/bash
+
+SOURCES=$(find . -name '*.go' -type f)
+
+liblcl-2.2.3.zip:
+	wget 'https://github.com/ying32/govcl/releases/download/v2.2.3/liblcl-2.2.3.zip'
+	
+liblcl.so: liblcl-2.2.3.zip
+	echo "154b4e4a1d5137a2ffe51cb4d0bf152dd997c12616ae30862775c0e4f0928e88 liblcl-2.2.3.zip" | sha256sum -c
+	unzip -j liblcl-2.2.3.zip linux64-gtk2/liblcl.so -d .
+	touch liblcl.so
+
+liblcl.dll: liblcl-2.2.3.zip
+	echo "154b4e4a1d5137a2ffe51cb4d0bf152dd997c12616ae30862775c0e4f0928e88 liblcl-2.2.3.zip" | sha256sum -c
+	unzip -j liblcl-2.2.3.zip win64/liblcl.dll -d .
+	touch liblcl.dll
+
+yvbolt: $(SOURCES)
+	GOOS=linux GOARCH=amd64 CGO_ENABLED=1 go build -trimpath -ldflags '-s -w'
+	chmod 755 yvbolt
+	upx --best yvbolt
+
+yvbolt.exe: $(SOURCES)
+	GOOS=windows GOARCH=amd64 CGO_ENABLED=1 CC=x86_64-w64-mingw32-gcc-win32 go build -trimpath -ldflags '-s -w'
+	upx --best yvbolt.exe
+
+yvbolt.linux64.tar.xz: yvbolt liblcl.so
+	rm -f yvbolt.linux64.tar.xz
+	XZ_OPT='--best' tar caf yvbolt.linux64.tar.xz --owner=0 --group=0 yvbolt liblcl.so
+	
+yvbolt.win64.zip: yvbolt.exe liblcl.dll
+	rm -f yvbolt.win64.zip
+	zip -9 yvbolt.win64.zip yvbolt.exe liblcl.dll
+
+.PHONY: dist
+dist: yvbolt.linux64.tar.xz yvbolt.win64.zip
+
+.PHONY: clean
+clean:
+	rm -f yvbolt.exe yvbolt yvbolt.linux64.tar.xz yvbolt.win64.zip
+
+.PHONY: clean-all
+clean-all: clean
+	rm -f liblcl-2.2.3.zip liblcl.so liblcl.dll

README.md

@@ -9,15 +9,19 @@ This is an experimental application and you should generally prefer to use [qbol
 - Native desktop application, running on Linux, Windows, and macOS
 - Connect to multiple databases
 - Browse table/bucket content
+  - Use context menu to perform special table/bucket actions
 - Run custom SQL queries
+  - Select text to run partial query
 - Safe handling for non-UTF8 key and data fields
 - Supported databases:
-  - Bolt
-    - Full compatibility via the upstream [etcd-io/bbolt](https://github.com/etcd-io/bbolt) library
-    - Recursive bucket support
-  - SQLite
-    - Uses CGo if available or modernc.org if not
   - Badger v4
+  - Bolt
+    - Recursive bucket support
+    - Option to open as readonly
+  - Pebble
+  - Redis
+  - SQLite
+    - Drivers: mattn (CGo), modernc.org (no cgo), experimental command-line driver
 
 ## License
 
@@ -25,6 +29,8 @@ The code in this project is licensed under the ISC license (see `LICENSE` file f
 
 This project redistributes images from the famfamfam/silk icon set under the [CC-BY 2.5 license](http://creativecommons.org/licenses/by/2.5/).
 
+This project includes trademarked logo images for each supported database type.
+
 ## Usage
 
 1. `CGO_ENABLED=1 go build`
@@ -34,20 +40,45 @@ This project redistributes images from the famfamfam/silk icon set under the [CC
 
 ## Changelog
 
+2024-06-29 v0.5.0
+
+- Pebble: Add as supported database
+- Bolt: Support opening as readonly
+- Bolt: Support creating new databases
+- Bolt: Support adding/removing recursive child buckets
+- SQLite: Support custom CLI driver that parses `/usr/bin/sqlite3 -json` output (experimental)
+- Redis: Improve query parser to support quoted strings
+- App: Support refreshing elements in nav tree
+- App: Help menu option to show driver versions
+- App: Add image icons for refresh and close context menu actions
+- Build: Add makefile for cross-compiling release binaries
+
+2024-06-23 v0.4.0
+
+- Redis: Add as supported database
+- Badger: Allow creating in-memory databases
+- App: Allow selecting partial query text to execute
+- App: Allow closing database connections from context menu
+- App: Allow scrolling large content on Properties pane
+- App: Preload recursive navigation
+- App: Automatically switch to selected database when new connection is created
+- App: Add help website link
+- App: Add database logo images
+
 2024-06-25 v0.3.0
 
-- Add support for running custom queries
+- Badger: Add BadgerDB v4 as supported database
-- Add BadgerDB v4 as supported database
+- SQLite: Add support for CGo-free SQLite driver under cross-compilation
-- Add support for CGo-free SQLite driver under cross-compilation
+- Bolt: Update Bolt to v1.4.0-alpha.1
-- Add status bar showing currently selected DB
+- App: Add support for running custom queries
-- Update Bolt to v1.4.0-alpha.1
+- App: Add status bar showing currently selected DB
-- Fix missing icons in nav when selecting items 
+- App: Fix missing icons in nav when selecting items 
-- Fix extra quotemarks when browsing string content of database
+- App: Fix extra quotemarks when browsing string content of database
 
 2024-06-08 v0.2.0
 
-- Add SQLite support (now requires CGo)
+- SQLite: Add SQLite support (now requires CGo)
-- Add images for menu and navigation items
+- App: Add images for menu and navigation items
 
 2024-06-03 v0.1.0
 

TODO

@@ -3,21 +3,32 @@
 - Delete row(s)
 - Binary data viewer
 	- Detect jpg/png and show as image
-- Warning if data table is filtered to 1000 rows, or add pagination
 - More DB types
 	- MySQL
 	- Postgres
-	- Redis
+		- CLI using psql
 	- MSSQL (recursive navigation for instances)
+	- Other K/V stores from https://github.com/smallnest/kvbench 
 - SSH tunnels
-- Special actions
+- Badger encryption key dialog
-	- Refresh tables
+- Pebble: connection options dialog
-	- Per-db actions e.g. compact, export backup
+- SQLite: DB compact action
-	- Per-table actions e.g. drop table
+- SQLite: DB export backup action
-- Sqlite cli driver for ssh tunnel
+- SQLite: drop table action
+- SQLite: show views, triggers, indexes in nav
+- SQLite CLI driver:
+	- Basic error handling
+	- Better lexing
+	- Attach to SSH tunnel
+	- Configure binary path
 	- https://ricardoanderegg.com/posts/sqlite-remote-explorer-gui/
 	- https://github.com/litements/litexplore
-- Badger encryption key dialog
+- Build
-- Badger in-memory
+	- Makefile to cross-compile release binaries in docker
-- Makefile to cross-compile release binaries in docker
+	- Build own liblcl binaries in docker
-- Win32 icon resource
+	- Win32 icon resource
+- Performance
+	- Warning if data table is filtered to 1000 rows, or add pagination
+	- Context/interrupt slow queries
+	- Faster virtual rendering
+		- https://github.com/ying32/govcl/blob/master/samples/listviewvirtualdata/main.go

db_badger.go

@@ -12,7 +12,6 @@ import (
 
 type badgerLoadedDatabase struct {
 	displayName string
-	path        string
 	db          *badger.DB
 	nav         *vcl.TTreeNode
 
@@ -104,26 +103,47 @@ func (ld *badgerLoadedDatabase) NavChildren(ndata *navData) ([]string, error) {
 	}
 }
 
+func (ld *badgerLoadedDatabase) NavContext(ndata *navData) ([]contextAction, error) {
+	return nil, nil // No special actions are supported
+}
+
 func (ld *badgerLoadedDatabase) ExecQuery(query string, resultArea *vcl.TListView) {
 	vcl.ShowMessage("Badger doesn't support querying")
 }
 
+func (ld *badgerLoadedDatabase) Close() {
+	_ = ld.db.Close()
+	ld.arena = nil
+}
+
 var _ loadedDatabase = &badgerLoadedDatabase{} // interface assertion
 
 //
 
+func (f *TMainForm) badgerAddDatabaseFromMemory() {
+	f.badgerAddDatabaseFrom(badger.DefaultOptions("").WithInMemory(true))
+}
+
 func (f *TMainForm) badgerAddDatabaseFromDirectory(path string) {
+	f.badgerAddDatabaseFrom(badger.DefaultOptions(path))
+}
+
+func (f *TMainForm) badgerAddDatabaseFrom(opts badger.Options) {
 	// TODO load in background thread to stop blocking the UI
-	db, err := badger.Open(badger.DefaultOptions(path))
+	db, err := badger.Open(opts)
 	if err != nil {
-		vcl.ShowMessage(fmt.Sprintf("Failed to load database '%s': %s", path, err.Error()))
+		vcl.ShowMessage(fmt.Sprintf("Failed to load database: %s", err.Error()))
 		return
 	}
 
 	ld := &badgerLoadedDatabase{
-		path:        path,
+		db: db,
-		displayName: filepath.Base(path),
+	}
-		db:          db,
+
+	if opts.Dir == "" {
+		ld.displayName = ":memory:" // SQLite-style naming
+	} else {
+		ld.displayName = filepath.Base(opts.Dir)
 	}
 
 	ld.nav = f.Buckets.Items().Add(nil, ld.displayName)
@@ -138,6 +158,7 @@ func (f *TMainForm) badgerAddDatabaseFromDirectory(path string) {
 	ld.nav.SetData(unsafe.Pointer(navData))
 
 	f.dbs = append(f.dbs, ld)
+	f.Buckets.SetSelected(ld.nav) // Select new element
 
 	ld.Keepalive(navData)
 }

db_bolt.go

@@ -94,17 +94,76 @@ func (ld *boltLoadedDatabase) NavChildren(ndata *navData) ([]string, error) {
 	return boltChildBucketNames(ld.db, ndata.bucketPath)
 }
 
+func (ld *boltLoadedDatabase) NavContext(ndata *navData) (ret []contextAction, err error) {
+	ret = append(ret, contextAction{"Add bucket...", ld.AddChildBucket})
+
+	if len(ndata.bucketPath) > 0 {
+		ret = append(ret, contextAction{"Delete bucket", ld.DeleteBucket})
+	}
+	return
+}
+
+func (ld *boltLoadedDatabase) AddChildBucket(ndata *navData) {
+	bucketName := ""
+	if !vcl.InputQuery(APPNAME, "Enter a name for the new bucket:", &bucketName) {
+		return // cancel
+	}
+
+	err := ld.db.Update(func(tx *bbolt.Tx) error {
+		parent := boltTargetBucket(tx, ndata.bucketPath)
+		if parent != nil {
+			_, err := parent.CreateBucket([]byte(bucketName))
+			return err
+		}
+
+		// Top-level
+		_, err := tx.CreateBucket([]byte(bucketName))
+		return err
+	})
+	if err != nil {
+		vcl.ShowMessageFmt("Error adding bucket: %v", err)
+	}
+}
+
+func (ld *boltLoadedDatabase) DeleteBucket(ndata *navData) {
+	err := ld.db.Update(func(tx *bbolt.Tx) error {
+		// Find parent of this bucket.
+		if len(ndata.bucketPath) >= 2 {
+			// child bucket
+			parent := boltTargetBucket(tx, ndata.bucketPath[0:len(ndata.bucketPath)-1])
+			return parent.DeleteBucket([]byte(ndata.bucketPath[len(ndata.bucketPath)-1]))
+		} else {
+			// top-level bucket
+			return tx.DeleteBucket([]byte(ndata.bucketPath[0]))
+		}
+	})
+	if err != nil {
+		vcl.ShowMessageFmt("Error deleting bucket %q: %v", strings.Join(ndata.bucketPath, `/`), err)
+	}
+}
+
 func (ld *boltLoadedDatabase) ExecQuery(query string, resultArea *vcl.TListView) {
 	vcl.ShowMessage("Bolt doesn't support querying")
 }
 
+func (ld *boltLoadedDatabase) Close() {
+	_ = ld.db.Close()
+	ld.arena = nil
+}
+
 var _ loadedDatabase = &boltLoadedDatabase{} // interface assertion
 
 //
 
-func (f *TMainForm) boltAddDatabaseFromFile(path string) {
+func (f *TMainForm) boltAddDatabaseFromFile(path string, readonly bool) {
 	// TODO load in background thread to stop blocking the UI
-	db, err := bbolt.Open(path, 0644, &bbolt.Options{Timeout: 1 * time.Second})
+
+	opts := bbolt.Options{
+		Timeout:  1 * time.Second,
+		ReadOnly: readonly,
+	}
+
+	db, err := bbolt.Open(path, 0644, &opts)
 	if err != nil {
 		vcl.ShowMessage(fmt.Sprintf("Failed to load database '%s': %s", path, err.Error()))
 		return
@@ -115,6 +174,9 @@ func (f *TMainForm) boltAddDatabaseFromFile(path string) {
 		displayName: filepath.Base(path),
 		db:          db,
 	}
+	if readonly {
+		ld.displayName += " (read-only)"
+	}
 
 	ld.nav = f.Buckets.Items().Add(nil, ld.displayName)
 	ld.nav.SetHasChildren(true) // dynamically populate in OnNavExpanding
@@ -128,6 +190,7 @@ func (f *TMainForm) boltAddDatabaseFromFile(path string) {
 	ld.nav.SetData(unsafe.Pointer(navData))
 
 	f.dbs = append(f.dbs, ld)
+	f.Buckets.SetSelected(ld.nav) // Select new element
 
 	ld.Keepalive(navData)
 }
@@ -163,13 +226,13 @@ func boltChildBucketNames(db *bbolt.DB, path []string) ([]string, error) {
 		if len(path) > 0 {
 			b := tx.Bucket([]byte(path[0]))
 			if b == nil {
-				return fmt.Errorf("Unexpected missing root bucket %q", path[0])
+				return fmt.Errorf("Root bucket %q: %w", path[0], ErrNavNotExist)
 			}
 
 			for i := 1; i < len(path); i += 1 {
 				b = b.Bucket([]byte(path[i]))
 				if b == nil {
-					return fmt.Errorf("Unexpected missing bucket %q", strings.Join(path[0:i], `/`))
+					return fmt.Errorf("Bucket %q: %w", strings.Join(path[0:i], `/`), ErrNavNotExist)
 				}
 			}
 

db_none.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"github.com/ying32/govcl/vcl"
+)
+
+type noLoadedDatabase struct{}
+
+func (n *noLoadedDatabase) DisplayName() string {
+	return APPNAME
+}
+
+func (n *noLoadedDatabase) DriverName() string {
+	return "No database selected"
+}
+
+func (n *noLoadedDatabase) RootElement() *vcl.TTreeNode {
+	return nil
+}
+
+func (n *noLoadedDatabase) RenderForNav(f *TMainForm, ndata *navData) {
+	f.propertiesBox.SetText("Open a database to get started...")
+	f.contentBox.SetEnabled(false)
+	f.contentBox.Clear()
+}
+
+func (n *noLoadedDatabase) ExecQuery(query string, resultArea *vcl.TListView) {
+}
+
+func (n *noLoadedDatabase) NavChildren(ndata *navData) ([]string, error) {
+	return []string{}, nil
+}
+
+func (ld *noLoadedDatabase) NavContext(ndata *navData) ([]contextAction, error) {
+	return nil, nil // No special actions are supported
+}
+
+func (n *noLoadedDatabase) Keepalive(ndata *navData) {
+}
+
+func (n *noLoadedDatabase) Close() {}

db_pebble.go

@@ -0,0 +1,144 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"path/filepath"
+	"unsafe"
+
+	"github.com/cockroachdb/pebble"
+	"github.com/cockroachdb/pebble/vfs"
+	"github.com/ying32/govcl/vcl"
+	"github.com/ying32/govcl/vcl/types"
+)
+
+type pebbleLoadedDatabase struct {
+	displayName string
+	db          *pebble.DB
+	nav         *vcl.TTreeNode
+
+	arena []*navData // keepalive
+}
+
+func (ld *pebbleLoadedDatabase) DisplayName() string {
+	return ld.displayName
+}
+
+func (ld *pebbleLoadedDatabase) DriverName() string {
+	return "Pebble " + version_Pebble // Parsed from embedded go.mod copy
+}
+
+func (ld *pebbleLoadedDatabase) RootElement() *vcl.TTreeNode {
+	return ld.nav
+}
+
+func (ld *pebbleLoadedDatabase) Keepalive(ndata *navData) {
+	ld.arena = append(ld.arena, ndata)
+}
+
+func (ld *pebbleLoadedDatabase) RenderForNav(f *TMainForm, ndata *navData) {
+
+	ctx := context.Background()
+
+	// Load properties
+
+	content := fmt.Sprintf("Pebble metrics: %#v", ld.db.Metrics())
+	f.propertiesBox.SetText(content)
+
+	// Load data
+
+	f.contentBox.SetEnabled(false)
+	f.contentBox.Clear()
+
+	// pebble always uses Key + Value as the columns
+
+	f.contentBox.Columns().Clear()
+	colKey := f.contentBox.Columns().Add()
+	colKey.SetCaption("Key")
+	colKey.SetWidth(MY_WIDTH)
+	colKey.SetAlignment(types.TaLeftJustify)
+	colVal := f.contentBox.Columns().Add()
+	colVal.SetCaption("Value")
+
+	itr := ld.db.NewIterWithContext(ctx, nil)
+	defer itr.Close()
+
+	for itr.First(); itr.Valid(); itr.Next() {
+		k := itr.Key()
+		v, err := itr.ValueAndErr()
+		if err != nil {
+			vcl.ShowMessage(fmt.Sprintf("Failed to load data for key %q: %s", formatAny(k), err.Error()))
+			return
+		}
+
+		dataEntry := f.contentBox.Items().Add()
+		dataEntry.SetCaption(formatUtf8(k))
+		dataEntry.SubItems().Add(formatUtf8(v))
+	}
+
+	// Valid
+	f.contentBox.SetEnabled(true)
+}
+
+func (ld *pebbleLoadedDatabase) NavChildren(ndata *navData) ([]string, error) {
+	// In the pebble implementation, there is only one child: "Data"
+	if len(ndata.bucketPath) == 0 {
+		return []string{"Data"}, nil
+
+	} else {
+		// No children deeper than that
+		return []string{}, nil
+	}
+}
+
+func (ld *pebbleLoadedDatabase) NavContext(ndata *navData) ([]contextAction, error) {
+	return nil, nil // No special actions are supported
+}
+
+func (ld *pebbleLoadedDatabase) ExecQuery(query string, resultArea *vcl.TListView) {
+	vcl.ShowMessage("pebble doesn't support querying")
+}
+
+func (ld *pebbleLoadedDatabase) Close() {
+	_ = ld.db.Close()
+	ld.arena = nil
+}
+
+var _ loadedDatabase = &pebbleLoadedDatabase{} // interface assertion
+
+//
+
+func (f *TMainForm) pebbleAddDatabaseFromMemory() {
+	f.pebbleAddDatabaseFrom("", &pebble.Options{FS: vfs.NewMem()})
+}
+
+func (f *TMainForm) pebbleAddDatabaseFrom(dirname string, opts *pebble.Options) {
+	// TODO load in background thread to stop blocking the UI
+
+	db, err := pebble.Open(dirname, opts)
+	if err != nil {
+		vcl.ShowMessage(fmt.Sprintf("Failed to load database: %s", err.Error()))
+		return
+	}
+
+	ld := &pebbleLoadedDatabase{
+		db:          db,
+		displayName: filepath.Base(dirname),
+	}
+
+	ld.nav = f.Buckets.Items().Add(nil, ld.displayName)
+	ld.nav.SetHasChildren(true) // dynamically populate in OnNavExpanding
+	ld.nav.SetImageIndex(imgDatabase)
+	ld.nav.SetSelectedIndex(imgDatabase)
+	navData := &navData{
+		ld:             ld,
+		childrenLoaded: false,      // will be loaded dynamically
+		bucketPath:     []string{}, // empty = root
+	}
+	ld.nav.SetData(unsafe.Pointer(navData))
+
+	f.dbs = append(f.dbs, ld)
+	f.Buckets.SetSelected(ld.nav) // Select new element
+
+	ld.Keepalive(navData)
+}

db_redis.go

@@ -0,0 +1,290 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"strconv"
+	"unsafe"
+
+	"yvbolt/lexer"
+
+	"github.com/redis/go-redis/v9"
+	"github.com/ying32/govcl/vcl"
+	"github.com/ying32/govcl/vcl/types"
+)
+
+type redisLoadedDatabase struct {
+	displayName string
+	db          *redis.Client
+	nav         *vcl.TTreeNode
+
+	currentDb     int
+	maxDb         int
+	serverVersion string // populated at connection-time from INFO command
+
+	arena []*navData // keepalive
+}
+
+func (ld *redisLoadedDatabase) DisplayName() string {
+	return ld.displayName
+}
+
+func (ld *redisLoadedDatabase) DriverName() string {
+	return "Redis " + ld.serverVersion
+}
+
+func (ld *redisLoadedDatabase) RootElement() *vcl.TTreeNode {
+	return ld.nav
+}
+
+func (ld *redisLoadedDatabase) Keepalive(ndata *navData) {
+	ld.arena = append(ld.arena, ndata)
+}
+
+func (ld *redisLoadedDatabase) RenderForNav(f *TMainForm, ndata *navData) {
+	ctx := context.Background()
+
+	if len(ndata.bucketPath) == 0 {
+		// Top-level: Show info() on main Properties tab
+		infostr, err := ld.db.Info(ctx).Result()
+		if err != nil {
+			vcl.ShowMessage(fmt.Sprintf("Retreiving database info: %v", err))
+			return
+		}
+
+		f.propertiesBox.SetText(infostr)
+
+		// Disable data tab
+		f.contentBox.SetEnabled(false)
+		f.contentBox.Clear()
+
+	} else if len(ndata.bucketPath) == 1 {
+		// One selected database
+		// Figure out its content
+		err := ld.db.Do(ctx, "SELECT", ndata.bucketPath[0]).Err()
+		if err != nil {
+			vcl.ShowMessage(fmt.Sprintf("Switching to database %q: %v", ndata.bucketPath[0], err))
+			return
+		}
+
+		allKeys, err := ld.db.Keys(ctx, "*").Result()
+		if err != nil {
+			vcl.ShowMessage(fmt.Sprintf("Listing keys in database %q: %v", ndata.bucketPath[0], err))
+			return
+		}
+
+		f.propertiesBox.SetText(fmt.Sprintf("Database %s\nTotal keys: %d\n", ndata.bucketPath[0], len(allKeys)))
+
+		// Redis always uses Key + Value as the columns
+
+		f.contentBox.SetEnabled(false)
+		f.contentBox.Clear()
+
+		f.contentBox.Columns().Clear()
+		colKey := f.contentBox.Columns().Add()
+		colKey.SetCaption("Key")
+		colKey.SetWidth(MY_WIDTH)
+		colKey.SetAlignment(types.TaLeftJustify)
+		colType := f.contentBox.Columns().Add()
+		colType.SetCaption("Type")
+		colVal := f.contentBox.Columns().Add()
+		colVal.SetCaption("Value")
+
+		for _, key := range allKeys {
+			typeName, err := ld.db.Type(ctx, key).Result()
+			if err != nil {
+				vcl.ShowMessage(fmt.Sprintf("Loading %q/%q: %v", ndata.bucketPath[0], key, err))
+				return
+			}
+
+			dataEntry := f.contentBox.Items().Add()
+			dataEntry.SetCaption(key) // formatUtf8
+			dataEntry.SubItems().Add(typeName)
+
+			switch typeName {
+			case "string":
+				val, err := ld.db.Get(ctx, key).Result()
+				if err != nil {
+					vcl.ShowMessage(fmt.Sprintf("Loading %q/%q: %v", ndata.bucketPath[0], key, err))
+					return
+				}
+				dataEntry.SubItems().Add(val)
+
+			case "hash":
+				val, err := ld.db.HGetAll(ctx, key).Result()
+				if err != nil {
+					vcl.ShowMessage(fmt.Sprintf("Loading %q/%q: %v", ndata.bucketPath[0], key, err))
+					return
+				}
+				// It's a map[string]string
+				dataEntry.SubItems().Add(formatAny(val))
+
+			case "lists":
+				fallthrough
+			case "sets":
+				fallthrough
+			case "sorted sets":
+				fallthrough
+			case "stream":
+				fallthrough
+
+			default:
+				dataEntry.SubItems().Add("<<<other object type>>>")
+			}
+
+		}
+
+		// Valid
+		f.contentBox.SetEnabled(true)
+
+	} else {
+		vcl.ShowMessage(fmt.Sprintf("Unexpected nav position %q", ndata.bucketPath))
+		return
+
+	}
+}
+
+func (ld *redisLoadedDatabase) NavChildren(ndata *navData) ([]string, error) {
+	// ctx := context.Background()
+
+	if len(ndata.bucketPath) == 0 {
+		// Top-level: list of all child databases (usually 16x)
+		ret := make([]string, 0, ld.maxDb)
+		for i := 0; i < ld.maxDb; i++ {
+			ret = append(ret, fmt.Sprintf("%d", i))
+		}
+		return ret, nil
+
+	} else if len(ndata.bucketPath) == 1 {
+		// One selected database
+		// No child keys underneath it
+		return []string{}, nil
+
+	} else {
+		return nil, fmt.Errorf("Unexpected nav position %q", ndata.bucketPath)
+
+	}
+}
+
+func (ld *redisLoadedDatabase) NavContext(ndata *navData) ([]contextAction, error) {
+	return nil, nil // No special actions are supported
+}
+
+func (ld *redisLoadedDatabase) ExecQuery(query string, resultArea *vcl.TListView) {
+	ctx := context.Background()
+
+	// Need to parse the query into separate string+args fields for the protocol
+	fields, err := lexer.Fields(query)
+	if err != nil {
+		vcl.ShowMessage(fmt.Sprintf("Parsing the query: %v", err))
+		return
+	}
+
+	fields_boxed := box_interface(fields)
+
+	ret, err := ld.db.Do(ctx, fields_boxed...).Result()
+	if err != nil {
+		vcl.ShowMessage(fmt.Sprintf("The redis query returned an error: %v", err))
+		return
+	}
+
+	resultArea.SetEnabled(false)
+	resultArea.Clear()
+
+	resultArea.Columns().Clear()
+	colVal := resultArea.Columns().Add()
+	colVal.SetCaption("Result")
+
+	// The result is probably a single value or a string slice
+	switch ret := ret.(type) {
+	case []string:
+		// Multiple values
+		for _, single := range ret {
+			cell := resultArea.Items().Add()
+			cell.SetCaption(single) // formatUtf8
+		}
+
+	default:
+		// Single value
+		dataEntry := resultArea.Items().Add()
+		dataEntry.SetCaption(formatAny(ret)) // formatUtf8
+
+	}
+
+	resultArea.SetEnabled(true)
+}
+
+func (ld *redisLoadedDatabase) Close() {
+	_ = ld.db.Close()
+	ld.arena = nil
+}
+
+var _ loadedDatabase = &redisLoadedDatabase{} // interface assertion
+
+//
+
+func (f *TMainForm) redisConnect(opts *redis.Options) {
+	// TODO load in background thread to stop blocking the UI
+	ctx := context.Background()
+
+	ld := &redisLoadedDatabase{
+		displayName:   opts.Addr,
+		currentDb:     0,
+		maxDb:         1,
+		serverVersion: "<unknown>",
+	}
+
+	// Patch in a hook to remember current DB after keepalive reconnection
+	opts.DB = 0 // Default
+	opts.OnConnect = func(ctx context.Context, cn *redis.Conn) error {
+		return cn.Select(ctx, ld.currentDb).Err()
+	}
+
+	// NewClient doesn't necessarily connect, so it can't throw an err
+	ld.db = redis.NewClient(opts)
+
+	// Make an INFO request (mandatory)
+	info, err := ld.db.InfoMap(ctx).Result()
+	if err != nil {
+		vcl.ShowMessage(fmt.Sprintf("Failed to connect to Redis server: During INFO: %v", err))
+		return
+	}
+
+	if serverInfo, ok := info["Server"]; ok {
+		if v, ok := serverInfo["redis_version"]; ok {
+			ld.serverVersion = v
+		}
+	}
+
+	// List available databases (usually 1..16) with "0" as default
+	// If this fails, probably the target redis does not support multiple databases
+	// (e.g. Redis Cluster). Assume max=0.
+	if maxDatabases, err := ld.db.ConfigGet(ctx, "databases").Result(); err == nil {
+		// Got a result. Must parse it
+		m, err := strconv.ParseInt(maxDatabases["databases"], 10, 64)
+		if err != nil {
+			vcl.ShowMessage(fmt.Sprintf("Failed to connect to Redis server: During CONFIG GET databases: %v", err))
+			return
+		}
+
+		ld.maxDb = int(m)
+	}
+
+	// Done with setup
+
+	ld.nav = f.Buckets.Items().Add(nil, ld.displayName)
+	ld.nav.SetHasChildren(true) // dynamically populate in OnNavExpanding
+	ld.nav.SetImageIndex(imgDatabase)
+	ld.nav.SetSelectedIndex(imgDatabase)
+	navData := &navData{
+		ld:             ld,
+		childrenLoaded: false,      // will be loaded dynamically
+		bucketPath:     []string{}, // empty = root
+	}
+	ld.nav.SetData(unsafe.Pointer(navData))
+
+	f.dbs = append(f.dbs, ld)
+	f.Buckets.SetSelected(ld.nav) // Select new element
+
+	ld.Keepalive(navData)
+}

db_sqlite.go

@@ -6,6 +6,8 @@ import (
 	"path/filepath"
 	"unsafe"
 
+	_ "yvbolt/sqliteclidriver"
+
 	"github.com/ying32/govcl/vcl"
 	"github.com/ying32/govcl/vcl/types"
 )
@@ -102,7 +104,7 @@ func (ld *sqliteLoadedDatabase) RenderForNav(f *TMainForm, ndata *navData) {
 }
 
 func (ld *sqliteLoadedDatabase) sqliteGetColumnNamesForTable(tableName string) ([]string, error) {
-	colr, err := ld.db.Query(`SELECT name FROM pragma_table_info(?)`, tableName)
+	colr, err := ld.db.Query(`SELECT name FROM pragma_table_info( ? )`, tableName)
 	if err != nil {
 		return nil, fmt.Errorf("Query: %w", err)
 	}
@@ -230,14 +232,28 @@ func (ld *sqliteLoadedDatabase) NavChildren(ndata *navData) ([]string, error) {
 	return nil, fmt.Errorf("unknown nav path %#v", ndata.bucketPath)
 }
 
+func (ld *sqliteLoadedDatabase) NavContext(ndata *navData) ([]contextAction, error) {
+	return nil, nil // No special actions are supported
+}
+
+func (ld *sqliteLoadedDatabase) Close() {
+	_ = ld.db.Close()
+	ld.arena = nil
+}
+
 var _ loadedDatabase = &sqliteLoadedDatabase{} // interface assertion
 
 //
 
-func (f *TMainForm) sqliteAddDatabaseFromFile(path string) {
+func (f *TMainForm) sqliteAddDatabaseFromFile(path string, cliDriver bool) {
+
+	driver := "sqlite3"
+	if cliDriver {
+		driver = "sqliteclidriver"
+	}
 
 	// TODO load in background thread to stop blocking the UI
-	db, err := sql.Open("sqlite3", path)
+	db, err := sql.Open(driver, path)
 	if err != nil {
 		vcl.ShowMessage(fmt.Sprintf("Failed to load database '%s': %s", path, err.Error()))
 		return
@@ -261,6 +277,7 @@ func (f *TMainForm) sqliteAddDatabaseFromFile(path string) {
 	ld.nav.SetData(unsafe.Pointer(navData))
 
 	f.dbs = append(f.dbs, ld)
+	f.Buckets.SetSelected(ld.nav) // Select new element
 
 	ld.Keepalive(navData)
 }

go.mod

@@ -3,36 +3,59 @@ module yvbolt
 go 1.19
 
 require (
+	github.com/cockroachdb/pebble v1.0.0
 	github.com/dgraph-io/badger/v4 v4.2.0
 	github.com/mattn/go-sqlite3 v1.14.22
+	github.com/pkg/browser v0.0.0-20240102092130-5ac0b6a4141c
+	github.com/redis/go-redis/v9 v9.5.3
+	github.com/stretchr/testify v1.9.0
 	github.com/ying32/govcl v2.2.3+incompatible
 	go.etcd.io/bbolt v1.4.0-alpha.1
 	modernc.org/sqlite v1.24.0
 )
 
 require (
+	github.com/DataDog/zstd v1.4.5 // indirect
+	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cespare/xxhash/v2 v2.2.0 // indirect
+	github.com/cockroachdb/errors v1.11.3 // indirect
+	github.com/cockroachdb/logtags v0.0.0-20230118201751-21c54148d20b // indirect
+	github.com/cockroachdb/redact v1.1.5 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/dgraph-io/ristretto v0.1.1 // indirect
+	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
+	github.com/getsentry/sentry-go v0.27.0 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/golang/glog v1.0.0 // indirect
-	github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6 // indirect
+	github.com/golang/groupcache v0.0.0-20200121045136-8c9f03a8e57e // indirect
-	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/golang/protobuf v1.5.3 // indirect
-	github.com/golang/snappy v0.0.3 // indirect
+	github.com/golang/snappy v0.0.4 // indirect
 	github.com/google/flatbuffers v1.12.1 // indirect
 	github.com/google/uuid v1.3.0 // indirect
 	github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51 // indirect
-	github.com/klauspost/compress v1.12.3 // indirect
+	github.com/klauspost/compress v1.16.0 // indirect
-	github.com/mattn/go-isatty v0.0.16 // indirect
+	github.com/kr/pretty v0.3.1 // indirect
+	github.com/kr/text v0.2.0 // indirect
+	github.com/mattn/go-isatty v0.0.17 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.2-0.20181231171920-c182affec369 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/prometheus/client_golang v1.12.0 // indirect
+	github.com/prometheus/client_model v0.2.1-0.20210607210712-147c58e9608a // indirect
+	github.com/prometheus/common v0.32.1 // indirect
+	github.com/prometheus/procfs v0.7.3 // indirect
 	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
+	github.com/rogpeppe/go-internal v1.9.0 // indirect
 	go.opencensus.io v0.22.5 // indirect
-	golang.org/x/mod v0.3.0 // indirect
+	golang.org/x/exp v0.0.0-20230626212559-97b1e661b5df // indirect
-	golang.org/x/net v0.7.0 // indirect
+	golang.org/x/mod v0.18.0 // indirect
+	golang.org/x/net v0.23.0 // indirect
 	golang.org/x/sys v0.19.0 // indirect
-	golang.org/x/tools v0.0.0-20210106214847-113979e3529a // indirect
+	golang.org/x/text v0.14.0 // indirect
-	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
+	golang.org/x/tools v0.13.0 // indirect
-	google.golang.org/protobuf v1.28.1 // indirect
+	google.golang.org/protobuf v1.33.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 	lukechampine.com/uint128 v1.2.0 // indirect
 	modernc.org/cc/v3 v3.40.0 // indirect
 	modernc.org/ccgo/v3 v3.16.13 // indirect

go.sum

@@ -1,9 +1,71 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
+cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
+cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
+cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
+cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
+cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
+cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
+cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
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+gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
+gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
+honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
+honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
 lukechampine.com/uint128 v1.2.0 h1:mBi/5l91vocEN8otkC5bDLhi2KdCticRiwbdB0O+rjI=
 lukechampine.com/uint128 v1.2.0/go.mod h1:c4eWIwlEGaxC/+H1VguhU4PHXNWDCDMUlWdIWl2j1gk=
 modernc.org/cc/v3 v3.40.0 h1:P3g79IUS/93SYhtoeaHW+kRCIrYaxJ27MFPv+7kaTOw=
@@ -157,3 +585,6 @@ modernc.org/tcl v1.15.2 h1:C4ybAYCGJw968e+Me18oW55kD/FexcHbqH2xak1ROSY=
 modernc.org/token v1.0.1 h1:A3qvTqOwexpfZZeyI0FeGPDlSWX5pjZu9hF4lU+EKWg=
 modernc.org/token v1.0.1/go.mod h1:UGzOrNV1mAFSEB63lOFHIpNRUVMvYTc6yu1SMY/XTDM=
 modernc.org/z v1.7.3 h1:zDJf6iHjrnB+WRD88stbXokugjyc0/pB91ri1gO6LZY=
+rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
+rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
+rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=

images.go

@@ -10,7 +10,8 @@ import (
 var assetsFs embed.FS
 
 const (
-	imgChartBar int32 = iota
+	imgArrowRefresh int32 = iota
+	imgChartBar
 	imgDatabase
 	imgDatabaseAdd
 	imgDatabaseDelete
@@ -21,6 +22,12 @@ const (
 	imgTableAdd
 	imgTableDelete
 	imgTableSave
+	imgVendorCockroach
+	imgVendorDgraph
+	imgVendorGithub
+	imgVendorMySQL
+	imgVendorRedis
+	imgVendorSqlite
 )
 
 func loadImages(owner vcl.IComponent) *vcl.TImageList {
@@ -40,6 +47,7 @@ func loadImages(owner vcl.IComponent) *vcl.TImageList {
 	}
 
 	ilist := vcl.NewImageList(owner)
+	ilist.Add(mustLoad("assets/arrow_refresh.png"), nil)
 	ilist.Add(mustLoad("assets/chart_bar.png"), nil)
 	ilist.Add(mustLoad("assets/database.png"), nil)
 	ilist.Add(mustLoad("assets/database_add.png"), nil)
@@ -51,6 +59,12 @@ func loadImages(owner vcl.IComponent) *vcl.TImageList {
 	ilist.Add(mustLoad("assets/table_add.png"), nil)
 	ilist.Add(mustLoad("assets/table_delete.png"), nil)
 	ilist.Add(mustLoad("assets/table_save.png"), nil)
+	ilist.Add(mustLoad("assets/vendor_cockroach.png"), nil)
+	ilist.Add(mustLoad("assets/vendor_dgraph.png"), nil)
+	ilist.Add(mustLoad("assets/vendor_github.png"), nil)
+	ilist.Add(mustLoad("assets/vendor_mysql.png"), nil)
+	ilist.Add(mustLoad("assets/vendor_redis.png"), nil)
+	ilist.Add(mustLoad("assets/vendor_sqlite.png"), nil)
 	return ilist
 
 }

lexer/lexer.go

@@ -0,0 +1,146 @@
+package lexer
+
+import (
+	"fmt"
+	"strings"
+)
+
+func isWhitespace(r byte) bool {
+	return (r == ' ' || r == '\t' || r == '\r' || r == '\n')
+}
+
+func Quote(input string) string {
+	return `"` + strings.ReplaceAll(strings.ReplaceAll(input, `\`, `\\`), `"`, `\"`) + `"`
+}
+
+// Fields splits a string into separate tokens using something kind of vaguely
+// like how SQL would do it.
+// The result still includes the quote and backslash characters.
+func Fields(input string) ([]string, error) {
+
+	const (
+		StateToplevel           = 0
+		StateWhitespace         = 1
+		StateInDoubleQuote      = 2
+		StateInDoubleQuoteSlash = 3
+		StateInSingleQuote      = 4
+		StateInSingleQuoteSlash = 5
+	)
+
+	var (
+		ret   []string
+		state int = StateToplevel
+		wip   string
+	)
+
+	for pos := 0; pos < len(input); pos++ {
+		c := input[pos]
+
+		switch state {
+
+		case StateToplevel:
+			if isWhitespace(c) {
+				state = StateWhitespace
+				if len(wip) != 0 {
+					ret = append(ret, wip)
+					wip = ""
+				}
+
+			} else if c == '"' {
+				if len(wip) != 0 {
+					return nil, fmt.Errorf(`Unexpected " at char %d`, pos)
+				}
+
+				wip += string(c)
+				state = StateInDoubleQuote
+
+			} else if c == '\'' {
+				if len(wip) != 0 {
+					return nil, fmt.Errorf(`Unexpected ' at char %d`, pos)
+				}
+
+				wip += string(c)
+				state = StateInSingleQuote
+
+			} else if c == '\\' {
+				return nil, fmt.Errorf(`Unexpected \ at char %d`, pos)
+
+			} else {
+				wip += string(c)
+			}
+
+		case StateWhitespace:
+			if isWhitespace(c) {
+				// continue
+			} else {
+				state = StateToplevel
+				pos-- // reparse
+			}
+
+		case StateInDoubleQuote:
+			if c == '"' {
+				wip += string(c)
+				ret = append(ret, wip)
+				wip = ""
+				state = StateToplevel
+
+			} else if c == '\\' {
+				wip += string(c)
+				state = StateInDoubleQuoteSlash
+
+			} else {
+				wip += string(c)
+			}
+
+		case StateInDoubleQuoteSlash:
+			if isWhitespace(c) {
+				return nil, fmt.Errorf(`Unexpected whitespace after \ at char %d`, pos)
+
+			} else {
+				wip += string(c)
+				state = StateInDoubleQuote
+			}
+
+		case StateInSingleQuote:
+			if c == '\'' {
+				wip += string(c)
+				ret = append(ret, wip)
+				wip = ""
+				state = StateToplevel
+
+			} else if c == '\\' {
+				wip += string(c)
+				state = StateInSingleQuoteSlash
+
+			} else {
+				wip += string(c)
+			}
+
+		case StateInSingleQuoteSlash:
+			if isWhitespace(c) {
+				return nil, fmt.Errorf(`Unexpected whitespace after \ at char %d`, pos)
+
+			} else {
+				wip += string(c)
+				state = StateInSingleQuote
+			}
+		}
+
+	}
+
+	// Reached the end of input stream
+	switch state {
+	case StateToplevel:
+		if len(wip) > 0 {
+			ret = append(ret, wip)
+			wip = ""
+		}
+		return ret, nil
+
+	case StateWhitespace:
+		return ret, nil
+
+	default:
+		return nil, fmt.Errorf(`Unexpected end of quoted input`)
+	}
+}

lexer/lexer_test.go

@@ -0,0 +1,107 @@
+package lexer
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestLexer(t *testing.T) {
+	type testCase struct {
+		input     string
+		expect    []string
+		expectErr bool
+	}
+
+	cases := []testCase{
+
+		testCase{
+			input:     "foo bar baz",
+			expect:    []string{"foo", "bar", "baz"},
+			expectErr: false,
+		},
+
+		// Quotes
+
+		testCase{
+			input:     `foo "bar" baz`,
+			expect:    []string{"foo", `"bar"`, "baz"},
+			expectErr: false,
+		},
+		testCase{
+			input:     `foo "bar baz" quux`,
+			expect:    []string{"foo", `"bar baz"`, "quux"},
+			expectErr: false,
+		},
+		testCase{
+			input:     `foo 'bar baz' quux`,
+			expect:    []string{"foo", `'bar baz'`, "quux"},
+			expectErr: false,
+		},
+
+		// Escape characters
+
+		testCase{
+			input:     `foo 'bar \n baz' quux`,
+			expect:    []string{"foo", `'bar \n baz'`, "quux"},
+			expectErr: false,
+		},
+		testCase{
+			input:     `foo "bar\"" baz`,
+			expect:    []string{"foo", `"bar\""`, "baz"},
+			expectErr: false,
+		},
+
+		// Collapsing whitespace
+
+		testCase{
+			input:     "   foo    bar   \r\t\n baz\n",
+			expect:    []string{"foo", "bar", "baz"},
+			expectErr: false,
+		},
+
+		// Errors
+
+		testCase{
+			input:     `foo "bar`,
+			expect:    nil,
+			expectErr: true, // mismatched quotes
+		},
+		testCase{
+			input:     `foo 'bar`,
+			expect:    nil,
+			expectErr: true, // mismatched quotes
+		},
+		testCase{
+			input:     `foo \"bar"`,
+			expect:    nil,
+			expectErr: true, // invalid top-level escape
+		},
+		testCase{
+			input:     `foo "bar\ "`,
+			expect:    nil,
+			expectErr: true, // escaping nothing
+		},
+	}
+
+	for _, tc := range cases {
+		out, err := Fields(tc.input)
+
+		if err != nil {
+			if !tc.expectErr {
+				t.Errorf("Test %q got error %v, expected nil", tc.input, err)
+			}
+
+		} else {
+
+			if tc.expectErr {
+				t.Errorf("Test %q got error <nil>, expected error", tc.input)
+				continue
+			}
+
+			if !reflect.DeepEqual(out, tc.expect) {
+				t.Errorf("Test %q got %v, expected %v", tc.input, out, tc.expect)
+			}
+		}
+
+	}
+}

loadedDatabase.go

@@ -1,9 +1,18 @@
 package main
 
 import (
+	"errors"
+
 	"github.com/ying32/govcl/vcl"
 )
 
+var ErrNavNotExist error = errors.New("The selected item no longer exists")
+
+type contextAction struct {
+	Name     string
+	Callback func(ndata *navData)
+}
+
 // loadedDatabase is a DB-agnostic interface for each loaded database.
 type loadedDatabase interface {
 	DisplayName() string
@@ -12,7 +21,9 @@ type loadedDatabase interface {
 	RenderForNav(f *TMainForm, ndata *navData)
 	ExecQuery(query string, resultArea *vcl.TListView)
 	NavChildren(ndata *navData) ([]string, error)
+	NavContext(ndata *navData) ([]contextAction, error)
 	Keepalive(ndata *navData)
+	Close()
 }
 
 // navData is the .Data() pointer for each TTreeNode in the left-hand tree.

main.go

@@ -1,26 +1,31 @@
 package main
 
 import (
+	"errors"
 	"fmt"
+	"runtime/debug"
 	"strings"
 	"unsafe"
 
-	_ "github.com/ying32/govcl/pkgs/winappres" // Extra _syso files for Windows
+	"github.com/pkg/browser"
 	"github.com/ying32/govcl/vcl"
 	"github.com/ying32/govcl/vcl/types"
+	"github.com/ying32/govcl/vcl/types/colors"
 )
 
 const (
-	MY_SPACING = 6
+	APPNAME      = "yvbolt"
-	MY_HEIGHT  = 90
+	HOMEPAGE_URL = "https://code.ivysaur.me/yvbolt"
-	MY_WIDTH   = 180
 )
 
 type TMainForm struct {
 	*vcl.TForm
 
-	ImageList     *vcl.TImageList
+	ImageList *vcl.TImageList
-	Menu          *vcl.TMainMenu
+	Menu      *vcl.TMainMenu
+
+	SQLiteUseCliDriver *vcl.TMenuItem
+
 	StatusBar     *vcl.TStatusBar
 	Buckets       *vcl.TTreeView
 	Tabs          *vcl.TPageControl
@@ -29,7 +34,8 @@ type TMainForm struct {
 	queryInput    *vcl.TMemo
 	queryResult   *vcl.TListView
 
-	dbs []loadedDatabase
+	none *noLoadedDatabase
+	dbs  []loadedDatabase
 }
 
 var (
@@ -43,40 +49,70 @@ func main() {
 func (f *TMainForm) OnFormCreate(sender vcl.IObject) {
 	f.ImageList = loadImages(f)
 
-	f.SetCaption("yvbolt")
+	f.SetCaption(APPNAME)
+	f.ScreenCenter()
 	f.ImageList.GetIcon(imgDatabaseLightning, f.Icon())
 
 	mnuFile := vcl.NewMenuItem(f)
 	mnuFile.SetCaption("File")
 
-	mnuFileOpen := vcl.NewMenuItem(mnuFile)
+	//
-	mnuFileOpen.SetCaption("Open Bolt database...")
-	mnuFileOpen.SetImageIndex(imgDatabaseAdd)
-	mnuFileOpen.SetShortCutFromString("Ctrl+O")
-	mnuFileOpen.SetOnClick(f.OnMnuFileOpenClick)
-	mnuFile.Add(mnuFileOpen)
 
-	mnuFileSqliteOpen := vcl.NewMenuItem(mnuFile)
+	mnuFileBadger := vcl.NewMenuItem(mnuFile)
-	mnuFileSqliteOpen.SetCaption("Open SQLite database...")
+	mnuFileBadger.SetCaption("Badger")
-	mnuFileSqliteOpen.SetImageIndex(imgDatabaseAdd)
+	mnuFileBadger.SetImageIndex(imgVendorDgraph)
-	mnuFileSqliteOpen.SetOnClick(f.OnMnuFileSqliteOpenClick)
+	mnuFile.Add(mnuFileBadger)
-	mnuFile.Add(mnuFileSqliteOpen)
 
-	mnuFileBadgerOpen := vcl.NewMenuItem(mnuFile)
+	vcl_menuitem(mnuFileBadger, "Open database...", imgDatabaseAdd, f.OnMnuFileBadgerOpenClick)
-	mnuFileBadgerOpen.SetCaption("Open Badger v4 database...")
+	vcl_menuitem(mnuFileBadger, "New in-memory database", imgDatabaseAdd, f.OnMnuFileBadgerMemoryClick)
-	mnuFileBadgerOpen.SetImageIndex(imgDatabaseAdd)
-	mnuFileBadgerOpen.SetOnClick(f.OnMnuFileBadgerOpenClick)
-	mnuFile.Add(mnuFileBadgerOpen)
 
-	mnuFileSqliteMemory := vcl.NewMenuItem(mnuFile)
+	//
-	mnuFileSqliteMemory.SetCaption("New SQLite in-memory database")
-	mnuFileSqliteMemory.SetImageIndex(imgDatabaseAdd)
-	mnuFileSqliteMemory.SetOnClick(f.OnMnuFileSqliteMemoryClick)
-	mnuFile.Add(mnuFileSqliteMemory)
 
-	mnuSep := vcl.NewMenuItem(mnuFile)
+	mnuFileBolt := vcl.NewMenuItem(mnuFile)
-	mnuSep.SetCaption("-") // Creates separator
+	mnuFileBolt.SetCaption("Bolt")
-	mnuFile.Add(mnuSep)
+	mnuFileBolt.SetImageIndex(imgVendorGithub)
+	mnuFile.Add(mnuFileBolt)
+
+	vcl_menuitem(mnuFileBolt, "New database...", imgDatabaseAdd, f.OnMnuFileBoltNewClick)
+	vcl_menuitem(mnuFileBolt, "Open database...", imgDatabaseAdd, f.OnMnuFileBoltOpenClick)
+	vcl_menuitem(mnuFileBolt, "Open database (read-only)...", imgDatabaseAdd, f.OnMnuFileBoltOpenReadonlyClick)
+
+	//
+
+	mnuFilePebble := vcl.NewMenuItem(mnuFile)
+	mnuFilePebble.SetCaption("Pebble")
+	mnuFilePebble.SetImageIndex(imgVendorCockroach)
+	mnuFile.Add(mnuFilePebble)
+
+	vcl_menuitem(mnuFilePebble, "Open database...", imgDatabaseAdd, f.OnMnuFilePebbleOpenClick)
+	vcl_menuitem(mnuFilePebble, "New in-memory database", imgDatabaseAdd, f.OnMnuFilePebbleMemoryClick)
+
+	//
+
+	mnuFileRedis := vcl.NewMenuItem(mnuFile)
+	mnuFileRedis.SetCaption("Redis")
+	mnuFileRedis.SetImageIndex(imgVendorRedis)
+	mnuFile.Add(mnuFileRedis)
+
+	vcl_menuitem(mnuFileRedis, "Connect...", imgDatabaseAdd, f.OnMnuFileRedisConnectClick)
+
+	//
+
+	mnuFileSqlite := vcl.NewMenuItem(mnuFile)
+	mnuFileSqlite.SetCaption("SQLite")
+	mnuFileSqlite.SetImageIndex(imgVendorSqlite)
+	mnuFile.Add(mnuFileSqlite)
+
+	vcl_menuitem(mnuFileSqlite, "Open database...", imgDatabaseAdd, f.OnMnuFileSqliteOpenClick)
+	vcl_menuitem(mnuFileSqlite, "New in-memory database", imgDatabaseAdd, f.OnMnuFileSqliteMemoryClick)
+
+	vcl_menuseparator(mnuFileSqlite)
+	f.SQLiteUseCliDriver = vcl_menuitem(mnuFileSqlite, "Connect using CLI driver (experimental)", -1, nil)
+	f.SQLiteUseCliDriver.SetAutoCheck(true)
+
+	//
+
+	vcl_menuseparator(mnuFile)
 
 	mnuFileExit := vcl.NewMenuItem(mnuFile)
 	mnuFileExit.SetCaption("Exit")
@@ -93,10 +129,25 @@ func (f *TMainForm) OnFormCreate(sender vcl.IObject) {
 	mnuQueryExecute.SetImageIndex(imgLightning)
 	mnuQuery.Add(mnuQueryExecute)
 
+	mnuHelp := vcl.NewMenuItem(f)
+	mnuHelp.SetCaption("Help")
+
+	mnuHelpVersion := vcl.NewMenuItem(mnuHelp)
+	mnuHelpVersion.SetCaption("Driver versions...")
+	mnuHelpVersion.SetOnClick(f.OnMenuHelpVersion)
+	mnuHelp.Add(mnuHelpVersion)
+
+	mnuHelpHomepage := vcl.NewMenuItem(mnuHelp)
+	mnuHelpHomepage.SetCaption("About " + APPNAME)
+	mnuHelpHomepage.SetShortCutFromString("F1")
+	mnuHelpHomepage.SetOnClick(f.OnMnuHelpHomepage)
+	mnuHelp.Add(mnuHelpHomepage)
+
 	f.Menu = vcl.NewMainMenu(f)
 	f.Menu.SetImages(f.ImageList)
 	f.Menu.Items().Add(mnuFile)
 	f.Menu.Items().Add(mnuQuery)
+	f.Menu.Items().Add(mnuHelp)
 
 	//
 
@@ -114,6 +165,7 @@ func (f *TMainForm) OnFormCreate(sender vcl.IObject) {
 	f.Buckets.SetReadOnly(true) // prevent click to rename on nodes
 	f.Buckets.SetOnExpanding(f.OnNavExpanding)
 	f.Buckets.SetOnChange(f.OnNavChange)
+	f.Buckets.SetOnContextPopup(f.OnNavContextPopup)
 
 	hsplit := vcl.NewSplitter(f)
 	hsplit.SetParent(f)
@@ -135,9 +187,11 @@ func (f *TMainForm) OnFormCreate(sender vcl.IObject) {
 	f.propertiesBox.BorderSpacing().SetAround(MY_SPACING)
 	f.propertiesBox.SetAlign(types.AlClient) // fill remaining space
 	f.propertiesBox.SetReadOnly(true)
-	f.propertiesBox.SetEnabled(false)
+	f.propertiesBox.SetEnabled(true)        // Need to leave it enabled so scrolling works
+	f.propertiesBox.SetColor(colors.ClForm) // 0x00f0f0f0
+
 	f.propertiesBox.SetBorderStyle(types.BsNone)
-	f.propertiesBox.SetText("Open a database to get started...")
+	f.propertiesBox.SetScrollBars(types.SsAutoVertical)
 
 	dataTab := vcl.NewTabSheet(f.Tabs)
 	dataTab.SetParent(f.Tabs)
@@ -199,25 +253,50 @@ func (f *TMainForm) OnFormCreate(sender vcl.IObject) {
 	f.queryResult.BorderSpacing().SetLeft(MY_SPACING)
 	f.queryResult.BorderSpacing().SetRight(MY_SPACING)
 	f.queryResult.BorderSpacing().SetBottom(MY_SPACING)
+
+	f.none = &noLoadedDatabase{}
+	f.OnNavChange(f, nil) // calls f.none.RenderForNav and sets up status bar content
 }
 
-func (f *TMainForm) OnMnuFileOpenClick(sender vcl.IObject) {
+func (f *TMainForm) OnMnuFileBoltNewClick(sender vcl.IObject) {
+	dlg := vcl.NewSaveDialog(f)
+	dlg.SetTitle("Save database as...")
+	dlg.SetFilter("Bolt database|*.db|All files|*.*")
+	ret := dlg.Execute() // Fake blocking
+	if ret {
+		f.boltAddDatabaseFromFile(dlg.FileName(), false)
+	}
+}
+
+func (f *TMainForm) OnMnuFileBoltOpenClick(sender vcl.IObject) {
 	dlg := vcl.NewOpenDialog(f)
 	dlg.SetTitle("Select a database file...")
 	dlg.SetFilter("Bolt database|*.db|All files|*.*")
 	ret := dlg.Execute() // Fake blocking
 	if ret {
-		f.boltAddDatabaseFromFile(dlg.FileName())
+		f.boltAddDatabaseFromFile(dlg.FileName(), false)
+	}
+}
+
+func (f *TMainForm) OnMnuFileBoltOpenReadonlyClick(sender vcl.IObject) {
+	dlg := vcl.NewOpenDialog(f)
+	dlg.SetTitle("Select a database file...")
+	dlg.SetFilter("Bolt database|*.db|All files|*.*")
+	ret := dlg.Execute() // Fake blocking
+	if ret {
+		f.boltAddDatabaseFromFile(dlg.FileName(), true)
 	}
 }
 
 func (f *TMainForm) OnMnuFileSqliteOpenClick(sender vcl.IObject) {
+	cliDriver := f.SQLiteUseCliDriver.Checked()
+
 	dlg := vcl.NewOpenDialog(f)
 	dlg.SetTitle("Select a database file...")
 	dlg.SetFilter("SQLite database|*.db;*.db3;*.sqlite;*.sqlite3|All files|*.*")
 	ret := dlg.Execute() // Fake blocking
 	if ret {
-		f.sqliteAddDatabaseFromFile(dlg.FileName())
+		f.sqliteAddDatabaseFromFile(dlg.FileName(), cliDriver)
 	}
 }
 
@@ -230,14 +309,177 @@ func (f *TMainForm) OnMnuFileBadgerOpenClick(sender vcl.IObject) {
 	}
 }
 
+func (f *TMainForm) OnMnuFileBadgerMemoryClick(sender vcl.IObject) {
+	f.badgerAddDatabaseFromMemory()
+}
+
+func (f *TMainForm) OnMnuFilePebbleOpenClick(sender vcl.IObject) {
+	dlg := vcl.NewSelectDirectoryDialog(f)
+	dlg.SetTitle("Select a database directory...")
+	ret := dlg.Execute() // Fake blocking
+	if ret {
+		f.pebbleAddDatabaseFrom(dlg.FileName(), nil)
+	}
+}
+
+func (f *TMainForm) OnMnuFilePebbleMemoryClick(sender vcl.IObject) {
+	f.pebbleAddDatabaseFromMemory()
+}
+
 func (f *TMainForm) OnMnuFileSqliteMemoryClick(sender vcl.IObject) {
-	f.sqliteAddDatabaseFromFile(`:memory:`)
+	cliDriver := f.SQLiteUseCliDriver.Checked()
+
+	f.sqliteAddDatabaseFromFile(`:memory:`, cliDriver)
+}
+
+func (f *TMainForm) OnMnuFileRedisConnectClick(sender vcl.IObject) {
+
+	var child *TRedisConnectionDialog
+	vcl.Application.CreateForm(&child)
+	defer child.Free()
+
+	var ret TRedisConnectionDialogResult
+	child.CustomReturn = &ret
+
+	mr := child.ShowModal() // Fake blocking
+	if mr != types.MrOk || ret == nil {
+		return // Cancelled
+	}
+
+	// Connect
+	f.redisConnect(ret)
 }
 
 func (f *TMainForm) OnMnuFileExitClick(sender vcl.IObject) {
 	f.Close()
 }
 
+func (f *TMainForm) OnMnuHelpHomepage(sender vcl.IObject) {
+	err := browser.OpenURL(HOMEPAGE_URL)
+	if err != nil {
+		vcl.ShowMessage("Opening browser: " + err.Error())
+	}
+}
+
+func (f *TMainForm) OnMenuHelpVersion(sender vcl.IObject) {
+
+	bi, ok := debug.ReadBuildInfo()
+	if !ok {
+		return
+	}
+
+	info := "This version of " + APPNAME + " was compiled with:\n"
+	for _, dep := range bi.Deps {
+
+		// Filter to only interesting things
+		switch dep.Path {
+		case `github.com/cockroachdb/pebble`,
+			`github.com/dgraph-io/badger/v4`,
+			`github.com/mattn/go-sqlite3`,
+			`github.com/redis/go-redis/v9`,
+			`go.etcd.io/bbolt`,
+			`modernc.org/sqlite`:
+			info += fmt.Sprintf("- %s %s\n", dep.Path, dep.Version)
+		}
+	}
+
+	vcl.ShowMessage(info)
+}
+
+func (f *TMainForm) OnNavContextPopup(sender vcl.IObject, mousePos types.TPoint, handled *bool) {
+	*handled = true
+
+	curItem := f.Buckets.Selected()
+	if curItem == nil {
+		// Nothing is selected at all
+		return
+	}
+
+	ndata := (*navData)(curItem.Data())
+
+	mnu := vcl.NewPopupMenu(f.Buckets)
+	mnu.SetImages(f.ImageList)
+
+	mnuRefresh := vcl.NewMenuItem(mnu)
+	mnuRefresh.SetCaption("Refresh")
+	mnuRefresh.SetImageIndex(imgArrowRefresh)
+	mnuRefresh.SetOnClick(func(sender vcl.IObject) { f.OnNavContextRefresh(curItem, ndata) })
+	mnu.Items().Add(mnuRefresh)
+
+	// Check what custom actions the ndata->db itself wants to add
+	actions, err := ndata.ld.NavContext(ndata)
+	if err != nil {
+		vcl.ShowMessage(err.Error())
+		return
+	}
+
+	if len(actions) > 0 {
+		mnuSep := vcl.NewMenuItem(mnu)
+		mnuSep.SetCaption("-")
+		mnu.Items().Add(mnuSep)
+
+		for _, action := range actions {
+			mnuAction := vcl.NewMenuItem(mnu)
+			mnuAction.SetCaption(action.Name)
+			cb := action.Callback // Copy to avoid reuse of loop variable
+			mnuAction.SetOnClick(func(sender vcl.IObject) {
+				cb(ndata)
+				f.OnNavContextRefresh(curItem, ndata)
+			})
+			mnu.Items().Add(mnuAction)
+		}
+	}
+
+	if curItem.Parent() == nil {
+		// Top-level item (database connection). Allow closing by right-click.
+		mnuSep := vcl.NewMenuItem(mnu)
+		mnuSep.SetCaption("-")
+		mnu.Items().Add(mnuSep)
+
+		mnuClose := vcl.NewMenuItem(mnu)
+		mnuClose.SetCaption("Close")
+		mnuClose.SetOnClick(f.OnNavContextClose)
+		mnuClose.SetImageIndex(imgDatabaseDelete)
+		mnu.Items().Add(mnuClose)
+	}
+
+	// Show popup
+	mnu.Popup2()
+}
+
+func (f *TMainForm) OnNavContextRefresh(item *vcl.TTreeNode, ndata *navData) {
+	isExpanded := item.Expanded()
+
+	// Reset nav node to 'unloaded' state
+	item.Collapse(true)
+	item.DeleteChildren()
+	item.SetHasChildren(true)
+	ndata.childrenLoaded = false
+
+	// Trigger a virtual reload
+	item.Expand(false) // Calls OnNavExpanding to dynamically detect children
+
+	// Restore previous gui state
+	item.SetExpanded(isExpanded)
+}
+
+func (f *TMainForm) OnNavContextClose(sender vcl.IObject) {
+	curItem := f.Buckets.Selected()
+	if curItem == nil {
+		return // Nothing selected (shouldn't happen)
+	}
+	if curItem.Parent() != nil {
+		return // Selection is not top-level DB connection (shouldn't happen)
+	}
+
+	ndata := (*navData)(curItem.Data())
+
+	ndata.ld.Close()
+	curItem.Delete()
+
+	// n.b. This triggers OnNavChange, which will then re-render from noLoadedDatabase{}
+}
+
 func (f *TMainForm) OnQueryExecute(sender vcl.IObject) {
 	// If query tab is not selected, switch to it, but do not exec
 	if f.Tabs.ActivePageIndex() != 2 {
@@ -245,6 +487,11 @@ func (f *TMainForm) OnQueryExecute(sender vcl.IObject) {
 		return
 	}
 
+	queryString := f.queryInput.Text()
+	if f.queryInput.SelLength() > 0 {
+		queryString = f.queryInput.SelText() // Just the selected text
+	}
+
 	// Execute
 	node := f.Buckets.Selected()
 	if node == nil {
@@ -253,22 +500,23 @@ func (f *TMainForm) OnQueryExecute(sender vcl.IObject) {
 	}
 
 	ndata := (*navData)(node.Data())
-	ndata.ld.ExecQuery(f.queryInput.Text(), f.queryResult)
+	ndata.ld.ExecQuery(queryString, f.queryResult)
 }
 
 func (f *TMainForm) OnNavChange(sender vcl.IObject, node *vcl.TTreeNode) {
 
-	if node.Data() == nil {
+	var ld loadedDatabase = f.none
-		vcl.ShowMessage("unexpected nil data")
+	var ndata *navData = nil
-		return
+
+	if node != nil && node.Data() != nil {
+		ndata = (*navData)(node.Data())
+		ld = ndata.ld
 	}
 
-	ndata := (*navData)(node.Data())
+	ld.RenderForNav(f, ndata) // Handover to the database type's own renderer function
-
-	ndata.ld.RenderForNav(f, ndata) // Handover to the database type's own renderer function
 
 	// We're in charge of common status bar text updates
-	f.StatusBar.SetSimpleText(ndata.ld.DisplayName() + " | " + ndata.ld.DriverName())
+	f.StatusBar.SetSimpleText(ld.DisplayName() + " | " + ld.DriverName())
 }
 
 func (f *TMainForm) OnNavExpanding(sender vcl.IObject, node *vcl.TTreeNode, allowExpansion *bool) {
@@ -281,25 +529,67 @@ func (f *TMainForm) OnNavExpanding(sender vcl.IObject, node *vcl.TTreeNode, allo
 
 	ndata := (*navData)(node.Data())
 
-	if ndata.childrenLoaded {
+	err := f.NavLoadChildren(node, ndata)
+	if err != nil {
+
+		if errors.Is(err, ErrNavNotExist) {
+			// The nav entry has been deleted.
+			// This is a normal thing to happen when e.g. deleting a table
+			// f.StatusBar.SetSimpleText(err.Error()) // Just gets overridden when the selection changes
+			node.Delete()
+			return
+		}
+
+		vcl.ShowMessage(err.Error())
+		*allowExpansion = false // Permanently block
 		return
 	}
 
+	*allowExpansion = node.HasChildren()
+
+	// While we're here - preload one single level deep (not any deeper)
+
+	if node.HasChildren() {
+
+		// This node has children that we haven't processed. Process them now
+		cc := node.GetFirstChild()
+
+		for {
+			ndataChild := (*navData)(cc.Data())
+			if ndataChild.childrenLoaded {
+				break // We always do them together, so if one's done, no need to keep looking
+			}
+
+			f.NavLoadChildren(cc, ndataChild)
+
+			cc = cc.GetNextSibling()
+			if cc == nil {
+				break
+			}
+		}
+
+	}
+}
+
+func (f *TMainForm) NavLoadChildren(node *vcl.TTreeNode, ndata *navData) error {
+
+	if ndata.childrenLoaded {
+		return nil // Nothing to do
+	}
+
 	// Find the child buckets from this point under the element
 	nextBucketNames, err := ndata.ld.NavChildren(ndata)
 	if err != nil {
-		vcl.ShowMessage(fmt.Sprintf("Failed to find child buckets under %q: %s", strings.Join(ndata.bucketPath, `/`), err.Error()))
+		return fmt.Errorf("Failed to find child buckets under %q: %w", strings.Join(ndata.bucketPath, `/`), err)
-		*allowExpansion = false
-		return
 	}
 
 	ndata.childrenLoaded = true // don't repeat this work
 
 	if len(nextBucketNames) == 0 {
 		node.SetHasChildren(false)
-		*allowExpansion = false
 
 	} else {
+		node.SetHasChildren(true)
 
 		// Populate LCL child nodes
 		for _, bucketName := range nextBucketNames {
@@ -319,7 +609,7 @@ func (f *TMainForm) OnNavExpanding(sender vcl.IObject, node *vcl.TTreeNode, allo
 
 			ndata.ld.Keepalive(navData)
 		}
-
-		*allowExpansion = true
 	}
+
+	return nil
 }

platform_windows.go

@@ -0,0 +1,5 @@
+package main
+
+import (
+	_ "github.com/ying32/govcl/pkgs/winappres" // Extra _syso files for Windows
+)

redisConnectionDialog.go

@@ -0,0 +1,130 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/redis/go-redis/v9"
+	"github.com/ying32/govcl/vcl"
+	"github.com/ying32/govcl/vcl/types"
+)
+
+type TRedisConnectionDialogResult = *redis.Options
+
+type TRedisConnectionDialog struct {
+	*vcl.TForm
+
+	Address         *vcl.TEdit
+	Port            *vcl.TSpinEdit
+	Password        *vcl.TEdit
+	IsResp3Protocol *vcl.TCheckBox
+	ConnectBtn      *vcl.TButton
+
+	// CustomReturn must be set by the caller to a *redis.Options variable.
+	CustomReturn *TRedisConnectionDialogResult // nil = no CustomReturn/cancelled dialog
+}
+
+func (f *TRedisConnectionDialog) OnFormCreate(sender vcl.IObject) {
+
+	f.SetCaption("Connect to Redis...")
+	f.ScreenCenter()
+	f.SetWidth(320)
+	f.SetHeight(160)
+
+	// row 1
+
+	row1 := vcl_row(f, 1)
+
+	lblAddress := vcl.NewLabel(row1)
+	lblAddress.SetParent(row1)
+	lblAddress.SetCaption("Address:")
+	lblAddress.SetAlign(types.AlLeft)
+	lblAddress.SetLayout(types.TlCenter)
+	lblAddress.SetLeft(1)
+	lblAddress.BorderSpacing().SetAround(MY_SPACING)
+
+	f.Address = vcl.NewEdit(row1)
+	f.Address.SetParent(row1)
+	f.Address.SetAlign(types.AlClient) // grow AlLeft)
+	f.Address.SetWidth(MY_WIDTH)
+	f.Address.SetLeft(2)
+	f.Address.SetText("127.0.0.1")
+	f.Address.BorderSpacing().SetAround(MY_SPACING)
+
+	lblPort := vcl.NewLabel(row1)
+	lblPort.SetParent(row1)
+	lblPort.SetCaption(":")
+	lblPort.SetAlign(types.AlRight)
+	lblPort.SetLayout(types.TlCenter)
+	lblPort.SetLeft(0)
+	lblPort.SetAutoSize(true)
+	lblPort.BorderSpacing().SetAround(MY_SPACING)
+
+	f.Port = vcl.NewSpinEdit(row1)
+	f.Port.SetParent(row1)
+	f.Port.SetMinValue(1)
+	f.Port.SetMaxValue(65535)
+	f.Port.SetValue(6379) // Redis default port
+	f.Port.SetAlign(types.AlRight)
+	f.Port.SetLeft(1000)
+	f.Port.BorderSpacing().SetAround(MY_SPACING)
+
+	// row 2
+
+	row2 := vcl_row(f, 2)
+
+	lblPassword := vcl.NewLabel(row2)
+	lblPassword.SetParent(row2)
+	lblPassword.SetCaption("Password:")
+	lblPassword.SetAlign(types.AlLeft)
+	lblPassword.SetLayout(types.TlCenter)
+	lblPassword.SetLeft(1)
+	lblPassword.BorderSpacing().SetAround(MY_SPACING)
+
+	f.Password = vcl.NewEdit(row2)
+	f.Password.SetParent(row2)
+	f.Password.SetAlign(types.AlClient) // grow
+	f.Password.SetLeft(2)
+	f.Password.SetWidth(MY_WIDTH)
+	f.Password.SetPasswordChar(uint16('*'))
+	f.Password.BorderSpacing().SetAround(MY_SPACING)
+
+	// row 3
+
+	f.IsResp3Protocol = vcl.NewCheckBox(f)
+	f.IsResp3Protocol.SetParent(f)
+	f.IsResp3Protocol.SetCaption("Use RESP v3 protocol")
+	f.IsResp3Protocol.SetChecked(true)
+	f.IsResp3Protocol.SetAlign(types.AlTop)
+	f.IsResp3Protocol.SetTop(3)
+	f.IsResp3Protocol.BorderSpacing().SetAround(MY_SPACING)
+
+	// buttons
+
+	row4 := vcl_row(f, 4)
+	row4.SetAlign(types.AlBottom)
+
+	f.ConnectBtn = vcl.NewButton(row4)
+	f.ConnectBtn.SetParent(row4)
+	f.ConnectBtn.SetAlign(types.AlRight)
+	f.ConnectBtn.SetCaption("Connect")
+	f.ConnectBtn.SetOnClick(f.OnConnectBtnClick)
+}
+
+func (f *TRedisConnectionDialog) OnConnectBtnClick(sender vcl.IObject) {
+
+	ret := &redis.Options{
+		Addr:     fmt.Sprintf("%s:%d", f.Address.Text(), f.Port.Value()),
+		Password: f.Password.Text(),
+		DB:       0, // Start off with default DB, but, we will browse them ourselves
+		Protocol: 2, // RESP2
+	}
+
+	if f.IsResp3Protocol.Checked() {
+		ret.Protocol = 3 // RESP3
+	}
+
+	// Success.
+	// Fill in target pointer and close dialog with "MrOk" sentinel
+	*f.CustomReturn = ret
+	f.SetModalResult(types.MrOk)
+}

sqliteclidriver/sqliteclidriver.go

@@ -0,0 +1,314 @@
+// sqliteclidriver is a database/sql driver for SQLite implemented on top of
+// the sqlite3 command-line tool. This allows it to be used over remote SSH
+// connections.
+//
+// Functionality is limited.
+//
+// Known caveats:
+// - Lexer only understands ? if it's separated by spaces
+// - Bad error handling
+// - Few supported types
+// - Has to escape parameters for CLI instead of preparing them, so not safe for untrusted usage
+// - No context handling
+// - No way to configure sqlite3 command line path
+package sqliteclidriver
+
+import (
+	"bytes"
+	"context"
+	"database/sql"
+	"database/sql/driver"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"os/exec"
+	"yvbolt/lexer"
+)
+
+var ErrNotSupported = errors.New("Not supported")
+
+//
+
+type SCDriver struct{}
+
+func (d *SCDriver) Open(connectionString string) (driver.Conn, error) {
+	// TODO support custom binpath from our connection string
+
+	cmd := exec.Command(`/usr/bin/sqlite3`, `-noheader`, `-json`, connectionString) // n.b. doesn't support `--`
+
+	pw, err := cmd.StdinPipe()
+	if err != nil {
+		return nil, err
+	}
+
+	pr, err := cmd.StdoutPipe()
+	if err != nil {
+		return nil, err
+	}
+
+	pe, err := cmd.StderrPipe()
+	if err != nil {
+		return nil, err
+	}
+
+	err = cmd.Start()
+	if err != nil {
+		return nil, err
+	}
+
+	return &SCConn{
+		stdout: pr,
+		stderr: pe,
+		w:      pw,
+	}, nil
+}
+
+var _ driver.Driver = &SCDriver{} // interface assertion
+
+func init() {
+	sql.Register("sqliteclidriver", &SCDriver{})
+}
+
+//
+
+type SCConnector struct {
+	connectionString string
+	driver           *SCDriver
+}
+
+func (c *SCConnector) Connect(context.Context) (driver.Conn, error) {
+	return c.driver.Open(c.connectionString)
+}
+
+func (c *SCConnector) Driver() driver.Driver {
+	return c.driver
+}
+
+var _ driver.Connector = &SCConnector{} // interface assertion
+
+//
+
+type SCConn struct {
+	stdout io.Reader
+	stderr io.Reader
+	w      io.WriteCloser
+}
+
+func (c *SCConn) Prepare(query string) (driver.Stmt, error) {
+	f, err := lexer.Fields(query) // Rely on the query's escaping still being present
+	if err != nil {
+		return nil, err
+	}
+
+	if len(f) == 0 {
+		return nil, errors.New("Empty query")
+	}
+
+	return &SCStmt{
+		conn:  c,
+		query: f,
+	}, nil
+}
+
+func (c *SCConn) Close() error {
+	return c.w.Close()
+}
+
+func (c *SCConn) Begin() (driver.Tx, error) {
+	return nil, ErrNotSupported
+}
+
+var _ driver.Conn = &SCConn{} // interface assertion
+
+//
+
+type SCStmt struct {
+	conn  *SCConn
+	query []string
+}
+
+func (s *SCStmt) Close() error {
+	return nil
+}
+
+func (s *SCStmt) NumInput() int {
+	var ct int = 0
+	for _, token := range s.query {
+		if token == `?` {
+			ct++
+		}
+	}
+
+	return ct
+}
+
+func (s *SCStmt) buildQuery(args []driver.Value) ([]byte, error) {
+
+	// Embed query params
+	// WARNING: Not secure against injection? That's not a security boundary
+	// for the purposes of yvbolt, but maybe for other package users
+
+	var querybuilder bytes.Buffer
+
+	for _, token := range s.query {
+		if token == `?` {
+			if len(args) == 0 {
+				return nil, errors.New("Not enough arguments")
+			}
+
+			arg := args[0]
+			args = args[1:]
+
+			// Format the argument
+			if szarg, ok := arg.(string); ok {
+				querybuilder.WriteString(lexer.Quote(szarg))
+
+			} else if intarg, ok := arg.(int64); ok {
+				querybuilder.WriteString(fmt.Sprintf("%d", intarg))
+
+			} else if flarg, ok := arg.(float64); ok {
+				querybuilder.WriteString(fmt.Sprintf("%f", flarg))
+
+			} else {
+				return nil, fmt.Errorf("Parameter %v has unsupported type", arg)
+			}
+
+		} else {
+			// Normal token
+			querybuilder.WriteString(token)
+		}
+
+		// Whitespace
+		querybuilder.WriteByte(' ')
+	}
+
+	if len(args) != 0 {
+		return nil, errors.New("Too many arguments")
+	}
+
+	// Swap final whitespace for a \n
+	submit := querybuilder.Bytes()
+	submit[len(submit)-1] = '\n'
+
+	return submit, nil
+}
+
+func (s *SCStmt) Exec(args []driver.Value) (driver.Result, error) {
+
+	submit, err := s.buildQuery(args)
+	if err != nil {
+		return nil, err
+	}
+
+	_, err = io.CopyN(s.conn.w, bytes.NewReader(submit), int64(len(submit)))
+	if err != nil {
+		return nil, fmt.Errorf("Write: %w", err)
+	}
+
+	// Drain stdout
+	// TODO
+
+	// Drain stderr
+	// TODO
+
+	return &SCResult{}, nil
+}
+
+func (s *SCStmt) Query(args []driver.Value) (driver.Rows, error) {
+
+	submit, err := s.buildQuery(args)
+	if err != nil {
+		return nil, err
+	}
+
+	_, err = io.CopyN(s.conn.w, bytes.NewReader(submit), int64(len(submit)))
+	if err != nil {
+		return nil, fmt.Errorf("Write: %w", err)
+	}
+
+	// We expect some kind of thing on stdout
+	ret := []map[string]any{}
+	err = json.NewDecoder(s.conn.stdout).Decode(&ret)
+	if err != nil {
+		return nil, err
+	}
+
+	// Drain stderr
+	// TODO
+
+	// Come up with a canonical ordering for the columns after json.NewDecoder
+	// wiped it out for us
+	// FIXME use a different json parsing library
+
+	var columnNames []string
+	if len(ret) > 0 {
+		for k, _ := range ret[0] {
+			columnNames = append(columnNames, k)
+		}
+	}
+
+	//
+
+	return &SCRows{
+		idx:     0,
+		columns: columnNames,
+		data:    ret,
+	}, nil
+}
+
+var _ driver.Stmt = &SCStmt{} // interface assertion
+
+//
+
+type SCResult struct{}
+
+func (r *SCResult) LastInsertId() (int64, error) {
+	return 0, ErrNotSupported
+}
+
+func (r *SCResult) RowsAffected() (int64, error) {
+	return 0, ErrNotSupported
+}
+
+var _ driver.Result = &SCResult{} // interface assertion
+
+//
+
+type SCRows struct {
+	idx     int
+	columns []string
+	data    []map[string]any
+}
+
+func (r *SCRows) Columns() []string {
+	return r.columns
+}
+
+func (r *SCRows) Close() error {
+	r.idx = 0
+	r.data = nil
+	return nil
+}
+
+func (r *SCRows) Next(dest []driver.Value) error {
+	if r.idx >= len(r.data) {
+		return io.EOF
+	}
+
+	if len(dest) != len(r.data[r.idx]) {
+		return errors.New("Wrong number of arguments to Next()")
+	}
+
+	for i := 0; i < len(dest); i++ {
+		cell, ok := r.data[r.idx][r.columns[i]]
+		if !ok {
+			return fmt.Errorf("Result row %d is missing column #%d %q, unexpected", r.idx, i, r.columns[i])
+		}
+
+		dest[i] = cell
+	}
+
+	r.idx++
+	return nil
+}

sqliteclidriver/sqliteclidriver_test.go

@@ -0,0 +1,57 @@
+package sqliteclidriver
+
+import (
+	"database/sql"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestSqliteCliDriver(t *testing.T) {
+	db, err := sql.Open("sqliteclidriver", ":memory:")
+	require.NoError(t, err)
+
+	_, err = db.Exec(`CREATE TABLE my_test_table ( id INTEGER PRIMARY KEY, extra TEXT NOT NULL );`)
+	require.NoError(t, err)
+
+	_, err = db.Exec(`INSERT INTO my_test_table (id, extra) VALUES ( ? , ? ), ( ? , ? );`, 1337, "abcdef", 9001, "whoop")
+	require.NoError(t, err)
+
+	// Repeat this part to ensure we can make followup queries on the same connection
+	for i := 0; i < 3; i++ {
+
+		res, err := db.Query(`SELECT * FROM my_test_table ORDER BY id ASC;`)
+		require.NoError(t, err)
+
+		cols, err := res.Columns()
+		require.NoError(t, err)
+		require.EqualValues(t, cols, []string{"id", "extra"})
+
+		var rowCount int = 0
+
+		for res.Next() {
+			rowCount++
+
+			var idVal int
+			var extraVal string
+			err = res.Scan(&idVal, &extraVal)
+			if err != nil {
+				t.Fatal(err)
+			}
+
+			switch rowCount {
+			case 1:
+				require.EqualValues(t, 1337, idVal)
+				require.EqualValues(t, "abcdef", extraVal)
+
+			case 2:
+				require.EqualValues(t, 9001, idVal)
+				require.EqualValues(t, "whoop", extraVal)
+
+			}
+		}
+
+		require.Equal(t, rowCount, 2)
+
+	}
+}

util_types.go

@@ -0,0 +1,11 @@
+package main
+
+// box_interface creates a slice where all elements of the input slice are boxed
+// in an interface{} type.
+func box_interface[T any](input []T) []interface{} {
+	ret := make([]interface{}, 0, len(input))
+	for _, v := range input {
+		ret = append(ret, v)
+	}
+	return ret
+}

util_vcl.go

@@ -0,0 +1,51 @@
+package main
+
+import (
+	"github.com/ying32/govcl/vcl"
+	"github.com/ying32/govcl/vcl/types"
+)
+
+const (
+	MY_SPACING = 6
+	MY_HEIGHT  = 90
+	MY_WIDTH   = 180
+)
+
+// vcl_row makes a TPanel row inside the target component.
+func vcl_row(owner vcl.IWinControl, top int32) *vcl.TPanel {
+
+	r := vcl.NewPanel(owner)
+	r.SetParent(owner)
+	r.SetBorderStyle(types.BsNone)
+	r.SetBevelInner(types.BvNone)
+	r.SetBevelOuter(types.BvNone)
+	r.SetAlign(types.AlTop)
+	r.SetTop(top)
+	r.SetAutoSize(true)
+
+	return r
+}
+
+// vcl_menuitem makes a child TMenuItem inside the parent menu.
+func vcl_menuitem(parent *vcl.TMenuItem, caption string, imageIndex int32, onClick vcl.TNotifyEvent) *vcl.TMenuItem {
+	m := vcl.NewMenuItem(parent)
+	m.SetCaption(caption)
+	if imageIndex != -1 {
+		m.SetImageIndex(imageIndex)
+	}
+	if onClick != nil {
+		m.SetOnClick(onClick)
+	}
+	parent.Add(m)
+
+	return m
+}
+
+// vcl_menuseparator adds a separator to the parent TMenuItem.
+func vcl_menuseparator(parent *vcl.TMenuItem) *vcl.TMenuItem {
+	s := vcl.NewMenuItem(parent)
+	s.SetCaption("-") // Creates separator
+	parent.Add(s)
+
+	return s
+}

versions.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+	"runtime/debug"
+)
+
+var (
+	version_Pebble string
+)
+
+func init() {
+
+	// ReadBuildInfo still works even with `-ldflags '-s -w'`.
+	mm, ok := debug.ReadBuildInfo()
+	if !ok {
+		panic("Missing build info")
+	}
+
+	for _, dep := range mm.Deps {
+		switch dep.Path {
+		case "github.com/cockroachdb/pebble":
+			version_Pebble = dep.Version
+		}
+	}
+}