Add more 'man page' like functionality

cfg/common_settings.go

@@ -51,15 +51,15 @@ type Sigils struct {
 type Common struct {
 	Colors
 	Module
-	Position
+	Position `help:"Defines where in the grid this module’s widget will be displayed."`
 	Sigils
 
-	Enabled         bool
-	RefreshInterval int
+	Enabled         bool `help:"Determines whether or not this module is executed and if its data displayed onscreen." values:"true, false"`
+	RefreshInterval int  `help:"How often, in seconds, this module will update its data." values:"A positive integer, 0..n." optional:"true"`
 	Title           string
 	Config          *config.Config
 
-	focusChar int
+	focusChar int `help:"Define one of the number keys as a short cut key to access the widget." optional:"true"`
 }
 
 func NewCommonSettingsFromModule(name, defaultTitle string, moduleConfig *config.Config, globalSettings *config.Config) *Common {

help/help.go

@@ -3,9 +3,9 @@ package help
 import (
 	"fmt"
 
-	//"github.com/wtfutil/wtf/cfg"
 	"github.com/olebedev/config"
 	"github.com/wtfutil/wtf/maker"
+	"github.com/wtfutil/wtf/utils"
 )
 
 func Display(moduleName string, config *config.Config) {
@@ -18,5 +18,8 @@ func Display(moduleName string, config *config.Config) {
 
 func helpFor(moduleName string, config *config.Config) string {
 	widget := maker.MakeWidget(nil, nil, moduleName, moduleName, config, config)
-	return widget.HelpText()
+	result := ""
+	result += utils.StripColorTags(widget.HelpText())
+	result += widget.ConfigText()
+	return result
 }

modules/git/settings.go

@@ -3,6 +3,7 @@ package git
 import (
 	"github.com/olebedev/config"
 	"github.com/wtfutil/wtf/cfg"
+	"github.com/wtfutil/wtf/utils"
 )
 
 const defaultTitle = "Git"
@@ -10,10 +11,10 @@ const defaultTitle = "Git"
 type Settings struct {
 	common *cfg.Common
 
-	commitCount  int
-	commitFormat string
-	dateFormat   string
-	repositories []interface{}
+	commitCount  int           `help:"The number of past commits to display." values:"A positive integer, 0..n."`
+	commitFormat string        `help:"The string format for the commit message." optional:"true"`
+	dateFormat   string        `help:"The string format for the date/time in the commit message." optional:"true"`
+	repositories []interface{} `help:"Defines which git repositories to watch." values:"A list of zero or more local file paths pointing to valid git repositories."`
 }
 
 func NewSettingsFromYAML(name string, ymlConfig *config.Config, globalConfig *config.Config) *Settings {
@@ -29,3 +30,11 @@ func NewSettingsFromYAML(name string, ymlConfig *config.Config, globalConfig *co
 
 	return &settings
 }
+
+func (widget *Widget) ConfigText() string {
+	return utils.HelpFromInterface(Settings{})
+}
+
+func (widget *Widget) HelpText() string {
+	return widget.KeyboardWidget.HelpText()
+}

modules/git/widget.go

@@ -85,10 +85,6 @@ func (widget *Widget) Refresh() {
 	widget.display()
 }
 
-func (widget *Widget) HelpText() string {
-	return widget.KeyboardWidget.HelpText()
-}
-
 /* -------------------- Unexported Functions -------------------- */
 
 func (widget *Widget) addCheckoutButton(form *tview.Form, fctn func()) {

utils/help_parser.go

@@ -0,0 +1,77 @@
+package utils
+
+import (
+	"reflect"
+	"regexp"
+	"strconv"
+	"unicode"
+	"unicode/utf8"
+
+	"github.com/wtfutil/wtf/cfg"
+)
+
+func lowercaseTitle(title string) string {
+	if title == "" {
+		return ""
+	}
+	r, n := utf8.DecodeRuneInString(title)
+	return string(unicode.ToLower(r)) + title[n:]
+}
+
+var (
+	openColorRegex = regexp.MustCompile(`\[.*?\]`)
+)
+
+func StripColorTags(input string) string {
+	return openColorRegex.ReplaceAllString(input, "")
+}
+
+func helpFromValue(field reflect.StructField) string {
+	result := ""
+	var help string = field.Tag.Get("help")
+	optional, err := strconv.ParseBool(field.Tag.Get("optional"))
+	if err != nil {
+		optional = false
+	}
+	var values string = field.Tag.Get("values")
+	if optional {
+		help = "Optional " + help
+	}
+	if help != "" {
+		result += "\n\n" + lowercaseTitle(field.Name)
+		result += "\n" + help
+		if values != "" {
+			result += "\nValues: " + values
+		}
+	}
+
+	return result
+}
+
+func HelpFromInterface(item interface{}) string {
+
+	result := ""
+	t := reflect.TypeOf(item)
+
+	for i := 0; i < t.NumField(); i++ {
+		field := t.Field(i)
+
+		kind := field.Type.Kind()
+		if field.Type.Kind() == reflect.Ptr {
+			kind = field.Type.Elem().Kind()
+		}
+
+		if field.Name == "common" {
+			result += HelpFromInterface(cfg.Common{})
+		}
+
+		switch kind {
+		case reflect.Interface:
+			result += HelpFromInterface(field.Type.Elem())
+		default:
+			result += helpFromValue(field)
+		}
+	}
+
+	return result
+}

wtf/bargraph.go

@@ -116,6 +116,10 @@ func (widget *BarGraph) HelpText() string {
 	return "No help available for this widget"
 }
 
+func (widget *BarGraph) ConfigText() string {
+	return ""
+}
+
 /* -------------------- Unexported Functions -------------------- */
 
 func (widget *BarGraph) addView() *tview.TextView {

wtf/text_widget.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/rivo/tview"
 	"github.com/wtfutil/wtf/cfg"
+	"github.com/wtfutil/wtf/utils"
 )
 
 type TextWidget struct {
@@ -123,6 +124,10 @@ func (widget *TextWidget) HelpText() string {
 	return fmt.Sprintf("\n  There is no help available for widget %s", widget.CommonSettings.Module.Type)
 }
 
+func (widget *TextWidget) ConfigText() string {
+	return utils.HelpFromInterface(cfg.Common{})
+}
+
 /* -------------------- Unexported Functions -------------------- */
 
 func (widget *TextWidget) addView() *tview.TextView {

wtf/wtfable.go

@@ -15,6 +15,7 @@ type Wtfable interface {
 	SetFocusChar(string)
 	TextView() *tview.TextView
 	HelpText() string
+	ConfigText() string
 
 	Height() int
 	Left() int