wip

new/go.mod

@@ -6,6 +6,7 @@ require (
 	github.com/charmbracelet/bubbles v0.16.1
 	github.com/charmbracelet/bubbletea v0.24.2
 	github.com/charmbracelet/lipgloss v0.7.1
+	github.com/mattn/go-runewidth v0.0.14
 	github.com/mazznoer/colorgrad v0.9.1
 )
 
@@ -15,7 +16,6 @@ require (
 	github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
 	github.com/mattn/go-isatty v0.0.18 // indirect
 	github.com/mattn/go-localereader v0.0.1 // indirect
-	github.com/mattn/go-runewidth v0.0.14 // indirect
 	github.com/mazznoer/csscolorparser v0.1.2 // indirect
 	github.com/muesli/ansi v0.0.0-20211018074035-2e021307bc4b // indirect
 	github.com/muesli/cancelreader v0.2.2 // indirect

new/help.go

@@ -0,0 +1,70 @@
+package main
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+
+	"github.com/charmbracelet/bubbles/key"
+	"github.com/charmbracelet/lipgloss"
+)
+
+func usage(keyMap KeyMap) string {
+	title := lipgloss.NewStyle().Bold(true)
+	pad := lipgloss.NewStyle().PaddingLeft(4)
+	return fmt.Sprintf(`
+  %v
+    Terminal JSON viewer
+
+  %v
+    fx data.json
+    fx data.json .field
+    curl ... | fx
+
+  %v
+    -h, --help          print help
+    -v, --version       print version
+
+  %v
+%v
+
+  %v
+    [https://fx.wtf]
+`,
+		title.Render("fx "+version),
+		title.Render("Usage"),
+		title.Render("Flags"),
+		title.Render("Key Bindings"),
+		strings.Join(keyMapInfo(keyMap, pad), "\n"),
+		title.Render("More info"),
+	)
+}
+
+func keyMapInfo(keyMap KeyMap, style lipgloss.Style) []string {
+	v := reflect.ValueOf(keyMap)
+	fields := reflect.VisibleFields(v.Type())
+
+	keys := make([]string, 0)
+	for i := range fields {
+		k := v.Field(i).Interface().(key.Binding)
+		str := k.Help().Key
+		if len(str) == 0 {
+			str = strings.Join(k.Keys(), ", ")
+		}
+		keys = append(keys, fmt.Sprintf("%v    ", str))
+	}
+
+	desc := make([]string, 0)
+	for i := range fields {
+		k := v.Field(i).Interface().(key.Binding)
+		desc = append(desc, fmt.Sprintf("%v", k.Help().Desc))
+	}
+
+	content := lipgloss.JoinHorizontal(
+		lipgloss.Top,
+		strings.Join(keys, "\n"),
+		strings.Join(desc, "\n"),
+	)
+
+	return strings.Split(style.Render(content), "\n")
+}

new/main.go

@@ -12,6 +12,11 @@ import (
 	tea "github.com/charmbracelet/bubbletea"
 )
 
+var (
+	flagHelp    bool
+	flagVersion bool
+)
+
 func main() {
 	if _, ok := os.LookupEnv("FX_PPROF"); ok {
 		f, err := os.Create("cpu.prof")
@@ -30,6 +35,27 @@ func main() {
 		defer pprof.WriteHeapProfile(memProf)
 	}
 
+	var args []string
+	for _, arg := range os.Args[1:] {
+		switch arg {
+		case "-h", "--help":
+			flagHelp = true
+		case "-v", "-V", "--version":
+			flagVersion = true
+		default:
+			args = append(args, arg)
+		}
+
+	}
+	if flagHelp {
+		fmt.Println(usage(keyMap))
+		return
+	}
+	if flagVersion {
+		fmt.Println(version)
+		return
+	}
+
 	data, err := io.ReadAll(os.Stdin)
 	if err != nil {
 		panic(err)

new/version.go

@@ -0,0 +1,3 @@
+package main
+
+const version = "30"