(#49) Handle introspect correctly when top has required flags or args

.github/workflows/test.yaml

@@ -5,7 +5,7 @@ jobs:
   test:
     strategy:
       matrix:
-        go: ["1.19", "1.20"]
+        go: ["1.20", "1.21"]
 
     runs-on: ubuntu-latest
     steps:

app.go

@@ -44,6 +44,7 @@ type Application struct {
 	noInterspersed     bool             // can flags be interspersed with args (or must they come first)
 	defaultEnvars      bool
 	completion         bool
+	introspect         bool
 	cheats             map[string]string
 	cheatTags          []string
 	helpFlagIsSet      bool
@@ -89,7 +90,7 @@ func New(name, help string) *Application {
 	a.Flag("completion-bash", "Output possible completions for the given args.").Hidden().UnNegatableBoolVar(&a.completion)
 	a.Flag("completion-script-bash", "Generate completion script for bash.").Hidden().PreAction(a.generateBashCompletionScript).UnNegatableBool()
 	a.Flag("completion-script-zsh", "Generate completion script for ZSH.").Hidden().PreAction(a.generateZSHCompletionScript).UnNegatableBool()
-	a.Flag("fisk-introspect", "Introspect the application model").Hidden().Action(a.introspectAction).UnNegatableBool()
+	a.Flag("fisk-introspect", "Introspect the application model").Hidden().Action(a.introspectAction).UnNegatableBoolVar(&a.introspect)
 
 	return a
 }
@@ -255,6 +256,9 @@ func (a *Application) Parse(args []string) (command string, err error) {
 	if a.completion {
 		a.generateBashCompletion(context)
 		a.terminate(0)
+	} else if a.introspect {
+		a.introspectAction(context)
+		a.terminate(0)
 	} else {
 		if parseErr != nil {
 			return "", parseErr

app_test.go

@@ -584,9 +584,21 @@ var docFS embed.FS
 
 func TestCheatFile(t *testing.T) {
 	c := newTestApp().CheatFile(docFS, "", "doc.go")
+
 	c.Command("x", "x").CheatFile(docFS, "y", "doc.go")
 	assert.Contains(t, c.cheats["test"], "Package fisk provides")
 	assert.Contains(t, c.cheats["y"], "Package fisk provides")
+
+}
+
+func TestFiskIntrospect(t *testing.T) {
+	var buf bytes.Buffer
+	c := newTestApp()
+	c.usageWriter = &buf
+	c.errorWriter = &buf
+	c.Flag("required", "required").Required().String()
+	c.MustParseWithUsage([]string{"--fisk-introspect"})
+	assert.NotContains(t, buf.String(), "required flag --required not provided")
 }
 
 func TestParseWithUsage(t *testing.T) {

go.mod

@@ -1,10 +1,10 @@
 module github.com/choria-io/fisk
 
-go 1.19
+go 1.20
 
 require (
 	github.com/stretchr/testify v1.8.4
-	golang.org/x/text v0.13.0
+	golang.org/x/text v0.14.0
 )
 
 require (

go.sum

@@ -4,8 +4,8 @@ github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZb
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
-golang.org/x/text v0.13.0 h1:ablQoSUd0tRdKxZewP80B+BaqeKJuVhuRxj/dkrun3k=
-golang.org/x/text v0.13.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
+golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
+golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=

usage.go

@@ -5,6 +5,7 @@ import (
 	"bytes"
 	"fmt"
 	"go/doc"
+	"go/doc/comment"
 	"io"
 	"strings"
 	"text/template"
@@ -33,7 +34,14 @@ func formatTwoColumns(w io.Writer, indent, padding, width int, rows [][2]string)
 
 	for _, row := range rows {
 		buf := bytes.NewBuffer(nil)
-		doc.ToText(buf, row[1], "", preIndent, width-s-padding-indent)
+		d := new(doc.Package).Parser().Parse(row[1])
+		pr := &comment.Printer{
+			TextPrefix:     "",
+			TextCodePrefix: preIndent,
+			TextWidth:      width - s - padding - indent,
+		}
+		buf.Write(pr.Text(d))
+
 		lines := strings.Split(strings.TrimRight(buf.String(), "\n"), "\n")
 		fmt.Fprintf(w, "%s%-*s%*s", indentStr, s, row[0], padding, "")
 		if len(row[0]) >= max {
@@ -134,7 +142,15 @@ func (a *Application) UsageForContextWithTemplate(context *ParseContext, indent
 		"Wrap": func(indent int, s string) string {
 			buf := bytes.NewBuffer(nil)
 			indentText := strings.Repeat(" ", indent)
-			doc.ToText(buf, s, indentText, "  "+indentText, width-indent)
+
+			d := new(doc.Package).Parser().Parse(s)
+			pr := &comment.Printer{
+				TextPrefix:     indentText,
+				TextCodePrefix: "  " + indentText,
+				TextWidth:      width - indent,
+			}
+			buf.Write(pr.Text(d))
+
 			return buf.String()
 		},
 		"FormatFlag": formatFlag,