help and docs

Makefile

@@ -44,7 +44,10 @@ docreflect_test.go: $(sources)
 	mkdir -p .build
 
 .build/wand: $(sources) iniparser.gen.go docreflect.gen.go .build
-	go build -o .build/wand -ldflags "-X main.version=$(shell date +%Y-%m-%d)-$(shell git rev-parse --short HEAD)" ./cmd/wand
+	go build \
+		-o .build/wand \
+		-ldflags "-X main.version=$(git show -s --format=%cs HEAD)-$(shell git rev-parse --short HEAD)" \
+		./cmd/wand
 
 install: .build/wand
 	cp .build/wand ~/bin

apply.go

@@ -18,11 +18,7 @@ func bindKeyVals(receiver reflect.Value, keyVals map[string][]string) bool {
 }
 
 func bindOptions(receiver reflect.Value, shortForms []string, o []option) bool {
-	ms := make(map[string]string)
+	ms := shortFormsToLong(shortForms)
-	for i := 0; i < len(shortForms); i += 2 {
-		ms[shortForms[i]] = shortForms[i+1]
-	}
-
 	v := make(map[string][]any)
 	for _, oi := range o {
 		n := oi.name

command.go

@@ -225,8 +225,9 @@ func validateShortFormsTree(cmd Cmd) (map[string]string, map[string]string, erro
 
 	mf := mapFields(cmd.impl)
 	_, helpDefined := mf["help"]
-	for i := 0; i < len(cmd.shortForms); i += 2 {
+	l2s := longFormsToShort(cmd.shortForms)
-		s, l := cmd.shortForms[i], cmd.shortForms[i+1]
+	for l, ss := range l2s {
+		for _, s := range ss {
 			if s == "h" && l == "help" && !helpDefined {
 				continue
 			}
@@ -262,6 +263,7 @@ func validateShortFormsTree(cmd Cmd) (map[string]string, map[string]string, erro
 			delete(unmapped, s)
 			mapped[s] = l
 		}
+	}
 
 	return mapped, unmapped, nil
 }
@@ -317,27 +319,10 @@ func boolOptions(cmd Cmd) []string {
 		n = append(n, "help")
 	}
 
-	sfm := make(map[string][]string)
-	for i := 0; i < len(cmd.shortForms); i += 2 {
-		s, l := cmd.shortForms[i], cmd.shortForms[i+1]
-		sfm[l] = append(sfm[l], s)
-	}
-
 	var sf []string
+	l2s := longFormsToShort(cmd.shortForms)
 	for _, ni := range n {
-		sf = append(sf, sfm[ni]...)
+		sf = append(sf, l2s[ni]...)
-	}
-
-	var hasHelpShortForm bool
-	for i := 0; i < len(cmd.shortForms); i += 2 {
-		if cmd.shortForms[i] == "h" {
-			hasHelpShortForm = true
-			break
-		}
-	}
-
-	if !hasHelp && !hasHelpShortForm {
-		sf = append(sf, "h")
 	}
 
 	return append(n, sf...)

command_test.go

@@ -238,6 +238,33 @@ func TestCommand(t *testing.T) {
 			testExec(testCase{impl: cmd, command: "foo"}, "same short form for different options", ""),
 		)
 
+		f3 := func(o struct{ Foo map[string]string }) string { return o.Foo["bar"] }
+		cmd = Command("foo", f3)
+		t.Run(
+			"free form",
+			testExec(testCase{impl: cmd, command: "foo --foo-bar baz"}, "option not supported"),
+		)
+
+		cmd = ShortForm(Command("foo", f3), "b", "foo-bar")
+		t.Run(
+			"short form for free form",
+			testExec(testCase{impl: cmd, command: "foo -b baz"}, "unmapped short form"),
+		)
+
+		f4 := func(o map[string]string) string { return o["foo"] }
+		cmd = ShortForm(Command("foo", f4), "f", "foo")
+		t.Run(
+			"short form for free form root",
+			testExec(testCase{impl: cmd, command: "foo -f baz"}, "unmapped short form"),
+		)
+
+		f5 := func(o struct{ Foo struct{ Bar string } }) string { return o.Foo.Bar }
+		cmd = ShortForm(Command("foo", f5), "b", "foo-bar")
+		t.Run(
+			"short form for child field",
+			testExec(testCase{impl: cmd, command: "foo -b baz"}, "", "baz"),
+		)
+
 		cmd = Command(
 			"foo",
 			f0,

commandline.go

@@ -273,17 +273,34 @@ func readArgs(boolOptions, args []string) commandLine {
 	return c
 }
 
+func shortFormsToLong(sf []string) map[string]string {
+	s2l := make(map[string]string)
+	for i := 0; i < len(sf); i += 2 {
+		s2l[sf[i]] = sf[i+1]
+	}
+
+	return s2l
+}
+
+func longFormsToShort(sf []string) map[string][]string {
+	l2s := make(map[string][]string)
+	for i := 0; i < len(sf); i += 2 {
+		l2s[sf[i+1]] = append(
+			l2s[sf[i+1]],
+			sf[i],
+		)
+	}
+
+	return l2s
+}
+
 func hasHelpOption(cmd Cmd, o []option) bool {
 	var mf map[string][]bind.Field
 	if cmd.impl != nil {
 		mf = mapFields(cmd.impl)
 	}
 
-	sf := make(map[string]string)
+	sf := shortFormsToLong(cmd.shortForms)
-	for i := 0; i < len(cmd.shortForms); i += 2 {
-		sf[cmd.shortForms[i]] = cmd.shortForms[i+1]
-	}
-
 	for _, oi := range o {
 		if !oi.value.isBool {
 			continue

config.go

@@ -2,6 +2,7 @@ package wand
 
 import (
 	"bytes"
+	"code.squareroundforest.org/arpio/textedit"
 	"errors"
 	"fmt"
 	"github.com/iancoleman/strcase"
@@ -62,27 +63,33 @@ func (f *file) Close() error {
 }
 
 func unescapeConfig(s string) string {
-	var (
+	var b bytes.Buffer
-		u       []rune
+	w := textedit.New(
-		escaped bool
+		&b,
+		textedit.Func(
+			func(r rune, escaped bool) ([]rune, bool) {
+				if escaped {
+					return []rune{r}, false
+				}
+
+				if r == '\\' {
+					return nil, true
+				}
+
+				return []rune{r}, false
+			},
+			func(escaped bool) []rune {
+				if escaped {
+					return []rune{'\\'}
+				}
+
+				return nil
+			},
+		),
 	)
 
-	r := []rune(s)
+	w.Write([]byte(s))
-	for _, ri := range r {
+	return b.String()
-		if escaped {
-			u = append(u, ri)
-			continue
-		}
-
-		if ri == '\\' {
-			escaped = true
-			continue
-		}
-
-		u = append(u, ri)
-	}
-
-	return string(u)
 }
 
 func unquoteConfig(s string) string {

debug.go

@@ -1,23 +0,0 @@
-package wand
-
-import (
-	"code.squareroundforest.org/arpio/notation"
-	"os"
-	"testing"
-)
-
-func debug(a ...any) {
-	if !testing.Testing() {
-		return
-	}
-
-	notation.Fprintln(os.Stderr, a...)
-}
-
-func debugw(a ...any) {
-	if !testing.Testing() {
-		return
-	}
-
-	notation.Fprintlnw(os.Stderr, a...)
-}

doclets.go

@@ -2,26 +2,44 @@ package wand
 
 const envDocs = `Every command line option's value can also be provided as an environment variable. Environment variable
 names need to use snake casing like myapp_foo_bar_baz or MYAPP_FOO_BAR_BAZ, or other casing that doesn't include the '-' dash
-character, and they need to be prefixed with the name of the application, as in the base name of the command. When both the
+character, and they need to be prefixed with the name of the application, as in the base name of the command.
-environment variable and the command line option is defined, the command line option overrides the environment variable. 
+
-Multiple values for the same environment variable can be defined by concatenating the values with the ':' separator
+When both the environment variable and the command line option is defined, the command line option overrides the environment
+variable. Multiple values for the same environment variable can be defined by concatenating the values with the ':' separator
 character. When overriding multiple values with command line options, all the environment values of the same field are
 dropped.`
 
 const configOptionDocs = `the config option allows to define zero or more configuration files at arbitrary path`
 
-const configDocs = `Every command line option's value can also be provided as an entry in a configuration file. Configuration
+const configDocs = `Every command line option's value can also be provided as an entry in a configuration file.
-file entries can use keys with different casings, e.g. snake case foo_bar_baz, or kebab case foo-bar-baz. The keys of the
+
-entries can use a limited set of characters: [a-zA-Z0-9_-], and the first character needs to be one of [a-zA-Z_]. Entry
+Configuration file entries can use keys with different casings, e.g. snake case foo_bar_baz, or kebab case foo-bar-baz. The
-values can consist of any characters, except for newline, control characters, " (quote) and \ (backslash), or the values can
+keys of the entries can use a limited set of characters: [a-zA-Z0-9_-], and the first character needs to be one of [a-zA-Z_].
-be quoted, in which case they can consist of any characters, spanning multiple lines, and only the " (quote) and \ (backslash)
+Entry values can consist of any characters, except for newline, control characters, " (quote) and \ (backslash), or the values
-characters need to be escaped by the \ (backslash) character. Configuration files allow multiple entries with the same key,
+can be quoted, in which case they can consist of any characters, spanning multiple lines, and only the " (quote) and \
-when if the associated command line option also allows multiple instances (marked with [*]). When an entry is defined
+(backslash) characters need to be escaped by the \ (backslash) character.
-multiple configuration files, the effective value is overridden in the order of the definition of the possible config files
+
-(see the listing order below). To discard values defined in the overridden config files without defining new ones, we can
+Configuration files allow multiple entries with the same key, when if the associated command line option also allows multiple
-set entries with only the key, omitting the = key/value separator. Entries in the config files are overridden by the
+instances (marked with [*]). When an entry is defined multiple configuration files, the effective value is overridden in the
-environment variables, when defined, and by the command line options when defined. Config files marked as optional don't
+order of the definition of the possible config files (see the listing order below). To discard values defined in the overridden
-need to be present in the file system, but if they exist, then they must contain valid configuration syntax which is wand's
+config files without defining new ones, we can set entries with only the key, omitting the = key/value separator. Entries in
-flavor of .ini files (https://code.squareroundforest.org/arpio/ini.treerack).`
+the config files are overridden by the environment variables, when defined, and by the command line options when defined.
+
+Config files marked as optional don't need to be present in the file system, but if they exist, then they must contain valid
+configuration syntax which is wand's flavor of .ini files
+(https://code.squareroundforest.org/arpio/wand/src/branch/main/ini.treerack).`
 
 const versionDocs = `Print the version of the current binary release.`
+
+const (
+	docListOptions  = `Options marked with [*] accept any number of instances.`
+	docBoolOptions  = `Bool options can be used with implicit true values.`
+	docOptionValues = `Option values can be set both via = or just separated by space.`
+)
+
+const docOptionGrouping = `The short form of bool options can be combined. ` +
+	`The last short form does not need to be a bool option. E.g. -abc=42.`
+
+const docSubcommandHelpFmt = `Show help for each subcommand by calling %s <subcommand> help or %s <subcommand> --help.`
+
+const docSubcommandHint = `Show help for each subcommand by calling <command> help or <command> --help.`

docreflect.gen.go

@@ -2,9 +2,10 @@
 Generated with https://code.squareroundforest.org/arpio/docreflect
 */
 
-
 package wand
+
 import "code.squareroundforest.org/arpio/docreflect"
+
 func init() {
 	docreflect.Register("code.squareroundforest.org/arpio/wand/tools", "")
 	docreflect.Register("code.squareroundforest.org/arpio/wand/tools.Docreflect", "\nfunc(out, packageName, gopaths)")
@@ -15,7 +16,10 @@ docreflect.Register("code.squareroundforest.org/arpio/wand/tools.ExecOptions.Cle
 	docreflect.Register("code.squareroundforest.org/arpio/wand/tools.ExecOptions.Import", "")
 	docreflect.Register("code.squareroundforest.org/arpio/wand/tools.ExecOptions.InlineImport", "")
 	docreflect.Register("code.squareroundforest.org/arpio/wand/tools.ExecOptions.NoCache", "")
-docreflect.Register("code.squareroundforest.org/arpio/wand/tools.Man", "\nfunc(out, commandDir)")
+	docreflect.Register("code.squareroundforest.org/arpio/wand/tools.Man", "\nfunc(out, o, commandDir)")
+	docreflect.Register("code.squareroundforest.org/arpio/wand/tools.ManOptions", "")
+	docreflect.Register("code.squareroundforest.org/arpio/wand/tools.ManOptions.DateString", "")
+	docreflect.Register("code.squareroundforest.org/arpio/wand/tools.ManOptions.Version", "")
 	docreflect.Register("code.squareroundforest.org/arpio/wand/tools.Markdown", "\nfunc(out, o, commandDir)")
 	docreflect.Register("code.squareroundforest.org/arpio/wand/tools.MarkdownOptions", "")
 	docreflect.Register("code.squareroundforest.org/arpio/wand/tools.MarkdownOptions.Level", "")

docreflect_test.go

@@ -2,16 +2,21 @@
 Generated with https://code.squareroundforest.org/arpio/docreflect
 */
 
-
 package wand
+
 import "code.squareroundforest.org/arpio/docreflect"
+
 func init() {
 	docreflect.Register("code.squareroundforest.org/arpio/wand/internal/tests/testlib", "")
 	docreflect.Register("code.squareroundforest.org/arpio/wand/internal/tests/testlib.Bar", "\nfunc(out, a, b, c)")
 	docreflect.Register("code.squareroundforest.org/arpio/wand/internal/tests/testlib.Baz", "\nfunc(o)")
-docreflect.Register("code.squareroundforest.org/arpio/wand/internal/tests/testlib.Foo", "Foo sums three numbers.\n\nfunc(a, b, c)")
+	docreflect.Register("code.squareroundforest.org/arpio/wand/internal/tests/testlib.CustomHelp", "\nfunc(o)")
+	docreflect.Register("code.squareroundforest.org/arpio/wand/internal/tests/testlib.Foo", "Foo sums three numbers.\nIt prints the sum to stdout.\n\nThe input numbers can be any integer.\n\nfunc(a, b, c)")
+	docreflect.Register("code.squareroundforest.org/arpio/wand/internal/tests/testlib.OptionWithHelp", "")
+	docreflect.Register("code.squareroundforest.org/arpio/wand/internal/tests/testlib.OptionWithHelp.Help", "Custom help.\n")
 	docreflect.Register("code.squareroundforest.org/arpio/wand/internal/tests/testlib.Options", "")
-docreflect.Register("code.squareroundforest.org/arpio/wand/internal/tests/testlib.Options.Duration", "")
+	docreflect.Register("code.squareroundforest.org/arpio/wand/internal/tests/testlib.Options.Bar", "Bars, any number.\n")
-docreflect.Register("code.squareroundforest.org/arpio/wand/internal/tests/testlib.Options.Foo", "")
+	docreflect.Register("code.squareroundforest.org/arpio/wand/internal/tests/testlib.Options.Duration", "Duration is another option.\n")
-docreflect.Register("code.squareroundforest.org/arpio/wand/internal/tests/testlib.Options.Time", "")
+	docreflect.Register("code.squareroundforest.org/arpio/wand/internal/tests/testlib.Options.Foo", "Foo is an option.\n")
+	docreflect.Register("code.squareroundforest.org/arpio/wand/internal/tests/testlib.Options.Time", "Time is the third option here.\n")
 }

exec.go

@@ -6,6 +6,7 @@ import (
 	"io"
 	"path/filepath"
 	"strconv"
+	"time"
 )
 
 func exec(stdin io.Reader, stdout, stderr io.Writer, exit func(int), cmd Cmd, conf Config, env, args []string) {
@@ -16,8 +17,14 @@ func exec(stdin io.Reader, stdout, stderr io.Writer, exit func(int), cmd Cmd, co
 		return
 	}
 
+	cmd = insertHelp(cmd)
+
+	// build time documentation generator mode:
 	if getenv(env, "_wandgenerate") == "man" {
-		if err := generateMan(stdout, cmd, conf); err != nil {
+		dateString := getenv(env, "_wandgeneratedate")
+		date, _ := time.Parse(time.DateOnly, dateString)
+		version := getenv(env, "_wandgenerateversion")
+		if err := generateMan(stdout, cmd, conf, date, version); err != nil {
 			fmt.Fprintln(stderr, err)
 			exit(1)
 		}
@@ -25,6 +32,7 @@ func exec(stdin io.Reader, stdout, stderr io.Writer, exit func(int), cmd Cmd, co
 		return
 	}
 
+	// build time documentation generator mode:
 	if getenv(env, "_wandgenerate") == "markdown" {
 		level, _ := strconv.Atoi(getenv(env, "_wandmarkdownlevel"))
 		if err := generateMarkdown(stdout, cmd, conf, level); err != nil {
@@ -35,13 +43,11 @@ func exec(stdin io.Reader, stdout, stderr io.Writer, exit func(int), cmd Cmd, co
 		return
 	}
 
-	cmd = insertHelp(cmd)
-
 	// will need root command for the config and the env:
 	rootCmd := cmd
 	cmd, fullCmd, args := selectCommand(cmd, args[1:])
 	if cmd.helpFor != nil {
-		if err := showHelp(stdout, cmd, conf, fullCmd); err != nil {
+		if err := showHelp(stdout, *cmd.helpFor, conf, fullCmd[:len(fullCmd)-1]); err != nil {
 			fmt.Fprintln(stderr, err)
 			exit(1)
 		}

exec_test.go

@@ -118,3 +118,7 @@ func testExec(test testCase, err string, expect ...string) func(*testing.T) {
 		}
 	}
 }
+
+func execTest(t *testing.T, test testCase, err string, expect ...string) {
+	testExec(test, err, expect...)(t)
+}

format.go

@@ -1,202 +0,0 @@
-package wand
-
-import (
-	"fmt"
-	"io"
-	"sort"
-	"strings"
-)
-
-func printer(out io.Writer) (printf func(f string, args ...any), println func(args ...any), finish func() error) {
-	var err error
-	printf = func(f string, args ...any) {
-		if err != nil {
-			return
-		}
-
-		_, err = fmt.Fprintf(out, f, args...)
-	}
-
-	println = func(args ...any) {
-		if err != nil {
-			return
-		}
-
-		_, err = fmt.Fprintln(out, args...)
-	}
-
-	finish = func() error {
-		return err
-	}
-
-	return
-}
-
-func paragraphs(s string) string {
-	var (
-		paragraph  []string
-		paragraphs [][]string
-	)
-
-	l := strings.Split(s, "\n")
-	for i := range l {
-		l[i] = strings.TrimSpace(l[i])
-		if l[i] == "" {
-			if len(paragraph) > 0 {
-				paragraphs, paragraph = append(paragraphs, paragraph), nil
-			}
-
-			continue
-		}
-
-		paragraph = append(paragraph, l[i])
-	}
-
-	if len(paragraph) > 0 {
-		paragraphs = append(paragraphs, paragraph)
-	}
-
-	var cparagraphs []string
-	for _, p := range paragraphs {
-		cparagraphs = append(cparagraphs, strings.Join(p, " "))
-	}
-
-	return strings.Join(cparagraphs, "\n\n")
-}
-
-func lines(s string) string {
-	p := paragraphs(s)
-	pp := strings.Split(p, "\n\n")
-	return strings.Join(pp, "\n")
-}
-
-func manParagraphs(s string) string {
-	p := paragraphs(s)
-	pp := strings.Split(p, "\n\n")
-	for i := range pp {
-		pp[i] = fmt.Sprintf(".PP\n%s", pp[i])
-	}
-
-	return strings.Join(pp, "\n")
-}
-
-func manLines(s string) string {
-	l := lines(s)
-	ll := strings.Split(l, "\n")
-	for i := range ll {
-		ll[i] = fmt.Sprintf(".br\n%s", ll[i])
-	}
-
-	return strings.Join(ll, "\n")
-}
-
-func escapeTeletype(s string) string {
-	r := []rune(s)
-	for i := range r {
-		if r[i] >= 0x00 && r[i] <= 0x1f && r[i] != '\n' && r[i] != '\t' {
-			r[i] = 0xb7
-		}
-
-		if r[i] >= 0x7f && r[i] <= 0x9f {
-			r[i] = 0xb7
-		}
-	}
-
-	return string(r)
-}
-
-func escapeRoff(s string) string {
-	var (
-		rr          []rune
-		lastNewline bool
-	)
-
-	r := []rune(s)
-	for _, ri := range r {
-		switch ri {
-		case '\\', '-', '"':
-			rr = append(rr, '\\', ri)
-		case '.', '\'':
-			if lastNewline {
-				rr = append(rr, '\\')
-			}
-
-			rr = append(rr, ri)
-		case 0x2013:
-			rr = append(rr, []rune("\\(en")...)
-		case 0x2014:
-			rr = append(rr, []rune("\\(em")...)
-		case 0x201c:
-			rr = append(rr, []rune("\\(lq")...)
-		case 0x201d:
-			rr = append(rr, []rune("\\(rq")...)
-		case 0x2018:
-			rr = append(rr, []rune("\\(oq")...)
-		case 0x2019:
-			rr = append(rr, []rune("\\(cq")...)
-		default:
-			rr = append(rr, ri)
-		}
-
-		lastNewline = ri == '\n'
-	}
-
-	return string(rr)
-}
-
-func escapeMD(s string) string {
-	var (
-		rr        []rune
-		lastDigit bool
-	)
-
-	r := []rune(s)
-	for _, ri := range r {
-		switch ri {
-		case '*', '_', '#', '-', '+', '[', ']', '`', '<', '>', '|', '\\':
-			rr = append(rr, '\\', ri)
-		case '.':
-			if lastDigit {
-				rr = append(rr, '\\')
-			}
-
-			rr = append(rr, ri)
-		default:
-			rr = append(rr, ri)
-		}
-
-		lastDigit = ri >= 0 && ri <= 9
-	}
-
-	return string(rr)
-}
-
-func prepareOptions(o []docOption) (names []string, descriptions map[string]string) {
-	for _, oi := range o {
-		ons := []string{fmt.Sprintf("--%s", oi.name)}
-		for _, sn := range oi.shortNames {
-			ons = append(ons, fmt.Sprintf("-%s", sn))
-		}
-
-		n := strings.Join(ons, ", ")
-		if oi.isBool {
-			n = fmt.Sprintf("%s [b]", n)
-		} else {
-			n = fmt.Sprintf("%s %s", n, oi.typ)
-		}
-
-		if oi.acceptsMultiple {
-			n = fmt.Sprintf("%s [*]", n)
-		}
-
-		names = append(names, n)
-		if descriptions == nil {
-			descriptions = make(map[string]string)
-		}
-
-		descriptions[n] = oi.description
-	}
-
-	sort.Strings(names)
-	return
-}

formathelp.go

@@ -1,239 +0,0 @@
-package wand
-
-import (
-	"fmt"
-	"github.com/iancoleman/strcase"
-	"io"
-	"sort"
-	"strings"
-)
-
-func formatHelp(out io.Writer, doc doc) error {
-	printf, println, finish := printer(out)
-	printf(escapeTeletype(doc.fullCommand))
-	println()
-	if doc.hasImplementation || doc.synopsis.hasSubcommands {
-		println()
-		printf("Synopsis")
-		println()
-	}
-
-	if doc.hasImplementation {
-		println()
-		printf(escapeTeletype(doc.synopsis.command))
-		if doc.synopsis.hasOptions {
-			printf(" [options...]")
-		}
-
-		for i := range doc.synopsis.arguments.names {
-			printf(
-				" [%s %s]",
-				doc.synopsis.arguments.names[i],
-				doc.synopsis.arguments.types[i],
-			)
-		}
-
-		if doc.synopsis.arguments.variadic {
-			printf("...")
-			min := doc.synopsis.arguments.minPositional
-			max := doc.synopsis.arguments.maxPositional
-			switch {
-			case min > 0 && max > 0:
-				printf("\nmin %d and max %d total positional arguments", min, max)
-			case min > 0:
-				printf("\nmin %d total positional arguments", min)
-			case max > 0:
-				printf("\nmax %d total positional arguments", max)
-			}
-		}
-
-		println()
-	}
-
-	if doc.synopsis.hasSubcommands {
-		println()
-		printf("%s <subcommand> [options or args...]", escapeTeletype(doc.synopsis.command))
-		println()
-		println()
-		printf("(For the details about the available subcommands, see the related section below.)")
-		println()
-	}
-
-	if doc.description != "" {
-		println()
-		printf(escapeTeletype(paragraphs(doc.description)))
-		println()
-	}
-
-	if len(doc.options) > 0 {
-		println()
-		printf("Options")
-		if doc.hasBoolOptions || doc.hasListOptions {
-			println()
-			if doc.hasBoolOptions {
-				println()
-				printf("[b]: booelan flag, true or false, or no argument means true")
-			}
-
-			if doc.hasListOptions {
-				println()
-				printf("[*]: accepts multiple instances of the same option")
-			}
-		}
-
-		println()
-		println()
-		names, od := prepareOptions(doc.options)
-
-		var max int
-		for _, n := range names {
-			if len(n) > max {
-				max = len(n)
-			}
-		}
-
-		for i := range names {
-			pad := strings.Join(make([]string, max-len(names[i])+1), " ")
-			names[i] = fmt.Sprintf("%s:%s", names[i], pad)
-		}
-
-		for _, n := range names {
-			printf(n)
-			if od[n] != "" {
-				printf(" %s", escapeTeletype(lines(od[n])))
-			}
-
-			println()
-		}
-	}
-
-	if len(doc.subcommands) > 0 {
-		println()
-		printf("Subcommands")
-		println()
-		println()
-
-		var names []string
-		cd := make(map[string]string)
-		for _, sc := range doc.subcommands {
-			name := sc.name
-			if sc.isDefault {
-				name = fmt.Sprintf("%s (default)", name)
-			}
-
-			d := sc.description
-			if sc.isHelp {
-				d = fmt.Sprintf("Show this help. %s", d)
-			}
-
-			if sc.hasHelpSubcommand {
-				d = fmt.Sprintf("%s - For help, see: %s %s help", d, escapeTeletype(doc.name), sc.name)
-			} else if sc.hasHelpOption {
-				d = fmt.Sprintf("%s - For help, see: %s %s --help", d, escapeTeletype(doc.name), sc.name)
-			}
-
-			cd[name] = d
-		}
-
-		sort.Strings(names)
-
-		var max int
-		for _, n := range names {
-			if len(n) > max {
-				max = len(n)
-			}
-		}
-
-		for i := range names {
-			pad := strings.Join(make([]string, max-len(names[i])+1), " ")
-			names[i] = fmt.Sprintf("%s%s", names[i], pad)
-		}
-
-		for _, n := range names {
-			printf(n)
-			if cd[n] != "" {
-				printf(": %s", escapeTeletype(paragraphs(cd[n])))
-			}
-
-			println()
-		}
-	}
-
-	if len(doc.options) > 0 && commandNameExpression.MatchString(doc.appName) {
-		println("Environment Variables")
-		println()
-		printf(escapeTeletype(paragraphs(envDocs)))
-		println()
-		println()
-		o := doc.options[0]
-		printf("Example environment variable:")
-		println()
-		println()
-		printf(strcase.ToSnake(fmt.Sprintf("%s-%s", doc.appName, o.name)))
-		printf("=")
-		if o.isBool {
-			printf("true")
-		} else {
-			printf("42")
-		}
-
-		println()
-	}
-
-	if len(doc.options) > 0 && len(doc.configFiles) > 0 {
-		println("Configuration Files")
-		println()
-		printf(escapeTeletype(paragraphs(configDocs)))
-		println()
-		println()
-		printf("Config files:")
-		println()
-		println()
-		for _, cf := range doc.configFiles {
-			if cf.fromOption {
-				printf("zero or more configuration files defined by the --config option")
-				println()
-				continue
-			}
-
-			if cf.fn != "" {
-				printf(cf.fn)
-				if cf.optional {
-					printf(" (optional)")
-				}
-
-				println()
-				continue
-			}
-		}
-
-		println()
-		o := doc.options[0]
-		printf("Example configuration entry:")
-		println()
-		println()
-		printf("# default for --")
-		printf(o.name)
-		printf(":")
-		println()
-		printf(strcase.ToSnake(o.name))
-		printf(" = ")
-		if o.isBool {
-			printf("true")
-		} else {
-			printf("42")
-		}
-
-		println()
-		println()
-		printf("Example for discarding an inherited entry:")
-		println()
-		println()
-		printf("# discarding an inherited entry:")
-		println()
-		printf(strcase.ToSnake(o.name))
-		println()
-	}
-
-	return finish()
-}

formatman.go

@@ -1,204 +0,0 @@
-package wand
-
-import (
-	"fmt"
-	"github.com/iancoleman/strcase"
-	"io"
-	"strings"
-	"time"
-)
-
-func formatManCommand(printf func(string, ...any), println func(...any), doc doc) {
-	println(".SH Synopsis")
-	printf(".B %s", escapeRoff(doc.synopsis.command))
-	if doc.synopsis.hasOptions {
-		printf(" [options...]")
-	}
-
-	for i := range doc.synopsis.arguments.names {
-		printf(
-			" [%s %s]",
-			doc.synopsis.arguments.names[i],
-			doc.synopsis.arguments.types[i],
-		)
-	}
-
-	min := doc.synopsis.arguments.minPositional
-	max := doc.synopsis.arguments.maxPositional
-	if doc.synopsis.arguments.variadic {
-		println("...")
-		if min > 0 || max > 0 {
-			println(".PP")
-		}
-
-		switch {
-		case min > 0 && max > 0:
-			printf("min %d and max %d total positional arguments\n", min, max)
-		case min > 0:
-			printf("min %d total positional arguments\n", min)
-		case max > 0:
-			printf("max %d total positional arguments\n", max)
-		}
-	}
-
-	if doc.synopsis.hasSubcommands {
-		if min > 0 || max > 0 {
-			println(".PP")
-		}
-
-		for i, sc := range doc.subcommands {
-			if i > 0 {
-				println(".br")
-			}
-
-			printf("%s %s\n", escapeRoff(doc.name), sc.name)
-		}
-	}
-
-	if doc.description != "" {
-		println(".SH Description")
-		println(manParagraphs(escapeRoff(doc.description)))
-	}
-
-	if len(doc.options) > 0 {
-		println(".SH Options")
-		if doc.hasBoolOptions || doc.hasListOptions {
-			println(".PP")
-		}
-
-		if doc.hasBoolOptions {
-			println(".B [b]:")
-			println("booelan flag, true or false, or no argument means true")
-		}
-
-		if doc.hasListOptions {
-			if doc.hasBoolOptions {
-				println(".br")
-			}
-
-			println(".B [*]:")
-			println("accepts multiple instances of the same option")
-		}
-
-		names, descriptions := prepareOptions(doc.options)
-		for _, n := range names {
-			println(".TP")
-			printf(".B %s\n", escapeRoff(n))
-			if descriptions[n] != "" {
-				println(manLines(escapeRoff(descriptions[n])))
-			}
-		}
-	}
-
-	if len(doc.options) > 0 && commandNameExpression.MatchString(doc.appName) {
-		println(".SH Environment Variables")
-		println(manParagraphs(escapeRoff(envDocs)))
-		println(".PP Example environment variable:")
-		o := doc.options[0]
-		println(".TP")
-		printf(strcase.ToSnake(fmt.Sprintf("%s-%s", doc.appName, o.name)))
-		printf("=")
-		if o.isBool {
-			printf("true")
-		} else {
-			printf("42")
-		}
-
-		println()
-	}
-
-	if len(doc.options) > 0 && len(doc.configFiles) > 0 {
-		println(".SH Configuration Files")
-		println(manParagraphs(escapeRoff(configDocs)))
-		println(".PP Config files:")
-		for i, cf := range doc.configFiles {
-			if i > 0 {
-				println(".br")
-			}
-
-			if cf.fromOption {
-				println(escapeRoff("zero or more configuration files defined by the --config option"))
-				continue
-			}
-
-			if cf.fn != "" {
-				printf(escapeRoff(cf.fn))
-				if cf.optional {
-					printf(" (optional)")
-				}
-
-				println()
-				continue
-			}
-		}
-
-		println(".PP Example configuration entry:")
-		println(".PP")
-		o := doc.options[0]
-		printf(escapeRoff(fmt.Sprintf("# default for --%s:\n", o.name)))
-		println(".br")
-		printf(escapeRoff(strcase.ToSnake(o.name)))
-		printf(" = ")
-		if o.isBool {
-			printf("true")
-		} else {
-			printf("42")
-		}
-
-		println()
-		println(".PP Example for discarding an inherited entry:")
-		println(".PP")
-		println("# discarding an inherited entry:")
-		println(".br")
-		println(escapeRoff(strcase.ToSnake(o.name)))
-	}
-}
-
-func formatManMultiCommand(out io.Writer, doc doc) error {
-	printf, println, finish := printer(out)
-	printf(".TH %s 1 %s \"%s\"\n", escapeRoff(doc.appName), escapeRoff(doc.date.Format(time.DateOnly)), escapeRoff(doc.appName))
-	printf(".SH Name\n%s\n", escapeRoff(doc.appName))
-	println(".SH Provides several commands:")
-	println(".PP")
-	allCommands := allCommands(doc)
-	for i, c := range allCommands {
-		if i > 0 {
-			println(".br")
-		}
-
-		println(escapeRoff(c.fullCommand))
-	}
-
-	for _, c := range allCommands {
-		printf(".SH %s\n", escapeRoff(strings.ToUpper(c.fullCommand)))
-		formatManCommand(printf, println, c)
-	}
-
-	return finish()
-}
-
-func formatManSingleCommand(out io.Writer, doc doc) error {
-	printf, println, finish := printer(out)
-	printf(".TH %s 1 %s \"%s\"\n", escapeRoff(doc.appName), escapeRoff(doc.date.Format(time.DateOnly)), escapeRoff(doc.appName))
-	printf(".SH Name\n%s\n", escapeRoff(doc.appName))
-	formatManCommand(printf, println, doc)
-	return finish()
-}
-
-func formatMan(out io.Writer, doc doc) error {
-	var hasSubcommands bool
-	for _, sc := range doc.subcommands {
-		if !sc.isHelp && !sc.isVersion {
-			continue
-		}
-
-		hasSubcommands = true
-		break
-	}
-
-	if hasSubcommands {
-		return formatManMultiCommand(out, doc)
-	}
-
-	return formatManSingleCommand(out, doc)
-}

formatmarkdown.go

@@ -1,201 +0,0 @@
-package wand
-
-import (
-	"fmt"
-	"github.com/iancoleman/strcase"
-	"io"
-	"strings"
-)
-
-func header(level int) string {
-	s := make([]string, level+2)
-	return strings.Join(s, "#")
-}
-
-func formatMarkdownCommand(printf func(string, ...any), println func(...any), doc doc, level int) {
-	printf("%s Synopsis\n\n", header(level))
-	println("```")
-	printf(doc.synopsis.command)
-	if doc.synopsis.hasOptions {
-		printf(" [options...]")
-	}
-
-	for i := range doc.synopsis.arguments.names {
-		printf(
-			" [%s %s]",
-			doc.synopsis.arguments.names[i],
-			doc.synopsis.arguments.types[i],
-		)
-	}
-
-	if doc.synopsis.arguments.variadic {
-		printf("...")
-	}
-
-	println()
-	println("```")
-
-	min := doc.synopsis.arguments.minPositional
-	max := doc.synopsis.arguments.maxPositional
-	if doc.synopsis.arguments.variadic {
-		if min > 0 || max > 0 {
-			println()
-		}
-
-		switch {
-		case min > 0 && max > 0:
-			printf("min %d and max %d total positional arguments\n", min, max)
-		case min > 0:
-			printf("min %d total positional arguments\n", min)
-		case max > 0:
-			printf("max %d total positional arguments\n", max)
-		}
-	}
-
-	if doc.synopsis.hasSubcommands {
-		println()
-		println("```")
-		for _, sc := range doc.subcommands {
-			printf("%s %s\n", escapeMD(doc.name), sc.name)
-		}
-
-		println("```")
-	}
-
-	if doc.description != "" {
-		printf("\n%s Description\n\n", header(level))
-		println(escapeMD(paragraphs(doc.description)))
-	}
-
-	if len(doc.options) > 0 {
-		printf("\n%s Options\n\n", header(level))
-		if doc.hasBoolOptions {
-			printf("- [b]: booelan flag, true or false, or no argument means true\n")
-		}
-
-		if doc.hasListOptions {
-			printf("- [*]: accepts multiple instances of the same option\n")
-		}
-
-		if doc.hasBoolOptions || doc.hasListOptions {
-			println()
-		}
-
-		names, descriptions := prepareOptions(doc.options)
-		for _, n := range names {
-			printf("- **%s**: %s\n", escapeMD(n), escapeMD(lines(descriptions[n])))
-		}
-	}
-
-	if len(doc.options) > 0 && commandNameExpression.MatchString(doc.appName) {
-		printf("\n.%s Environment Variables\n\n", header(level))
-		println(escapeMD(paragraphs(envDocs)))
-		println()
-		println("Example environment variable:")
-		println()
-		o := doc.options[0]
-		println("```")
-		printf(strcase.ToSnake(fmt.Sprintf("%s-%s", doc.appName, o.name)))
-		printf("=")
-		if o.isBool {
-			printf("true")
-		} else {
-			printf("42")
-		}
-
-		println()
-		println("```")
-	}
-
-	if len(doc.options) > 0 && len(doc.configFiles) > 0 {
-		printf("\n.Configuration Files\n\n")
-		println(escapeMD(paragraphs(configDocs)))
-		println()
-		println("Config files:")
-		println()
-		for _, cf := range doc.configFiles {
-			if cf.fromOption {
-				println("- zero or more configuration files defined by the --config option\n")
-				continue
-			}
-
-			if cf.fn != "" {
-				printf("- %s", cf.fn)
-				if cf.optional {
-					printf(" (optional)")
-				}
-
-				println()
-				continue
-			}
-		}
-
-		println()
-		println("Example configuration entry:")
-		println()
-		o := doc.options[0]
-		println("```")
-		printf("# default for --%s:\n", o.name)
-		printf(strcase.ToSnake(o.name))
-		printf(" = ")
-		if o.isBool {
-			printf("true")
-		} else {
-			printf("42")
-		}
-
-		println()
-		println("```")
-		println()
-		println("Example for discarding an inherited entry:")
-		println()
-		println("```")
-		println("# discarding an inherited entry:")
-		println(strcase.ToSnake(o.name))
-		println("```")
-	}
-}
-
-func formatMarkdownMultiCommand(out io.Writer, doc doc, level int) error {
-	printf, println, finish := printer(out)
-	printf("%s %s\n\n", header(level), escapeMD(doc.appName))
-	println("Provides several commands:")
-	println()
-	allCommands := allCommands(doc)
-	for _, c := range allCommands {
-		printf("- %s\n", escapeMD(c.fullCommand))
-	}
-
-	println()
-	for _, c := range allCommands {
-		printf("%s %s\n\n", header(level+1), escapeMD(c.fullCommand))
-		formatMarkdownCommand(printf, println, c, level+2)
-	}
-
-	return finish()
-}
-
-func formatMarkdownSingleCommand(out io.Writer, doc doc, level int) error {
-	printf, println, finish := printer(out)
-	printf("%s %s\n\n", header(level), doc.appName)
-	formatMarkdownCommand(printf, println, doc, level+1)
-	return finish()
-}
-
-func formatMarkdown(out io.Writer, doc doc, level int) error {
-	var hasSubcommands bool
-	for _, sc := range doc.subcommands {
-		if !sc.isHelp && !sc.isVersion {
-			continue
-		}
-
-		hasSubcommands = true
-		break
-	}
-
-	if hasSubcommands {
-		return formatMarkdownMultiCommand(out, doc, level)
-	}
-
-	return formatMarkdownSingleCommand(out, doc, level)
-}

go.mod

@@ -1,13 +1,20 @@
 module code.squareroundforest.org/arpio/wand
 
-go 1.25.0
+go 1.25.3
 
 require (
 	code.squareroundforest.org/arpio/bind v0.0.0-20251105181644-3443251be2d5
 	code.squareroundforest.org/arpio/docreflect v0.0.0-20251031192707-01c5ff18fab1
 	code.squareroundforest.org/arpio/notation v0.0.0-20251101123932-5f5c05ee0239
+	code.squareroundforest.org/arpio/textedit v0.0.0-20251207224821-c75c3965789f
+	code.squareroundforest.org/arpio/textfmt v0.0.0-20251207234108-fed32c8bbe18
 	code.squareroundforest.org/arpio/treerack v0.0.0-20251031193114-4f1c219052ae
 	github.com/iancoleman/strcase v0.3.0
+	golang.org/x/term v0.37.0
 )
 
-require golang.org/x/mod v0.27.0 // indirect
+require (
+	code.squareroundforest.org/arpio/html v0.0.0-20251103020946-e262eca50ac9 // indirect
+	golang.org/x/mod v0.27.0 // indirect
+	golang.org/x/sys v0.38.0 // indirect
+)

go.sum

@@ -1,20 +1,22 @@
-code.squareroundforest.org/arpio/bind v0.0.0-20250905213330-4591a086be1e h1:DkOYkD12OWMAczreQESVQF7b1KsyBQq4G700oGxNy08=
-code.squareroundforest.org/arpio/bind v0.0.0-20250905213330-4591a086be1e/go.mod h1:tTCmCwFABKNm3PO0Dclsp4zWhNQFTfg9+uSrgoarZFI=
 code.squareroundforest.org/arpio/bind v0.0.0-20251105181644-3443251be2d5 h1:SIgLIawD6Vv7rAvUobpVshLshdwFEJ0NOUrWpheS088=
 code.squareroundforest.org/arpio/bind v0.0.0-20251105181644-3443251be2d5/go.mod h1:tTCmCwFABKNm3PO0Dclsp4zWhNQFTfg9+uSrgoarZFI=
-code.squareroundforest.org/arpio/docreflect v0.0.0-20250904132730-afd27063724e h1:f7wtGAmuTYH/VTn92sBTtKhs463q+DTtW2yKgst2kl8=
-code.squareroundforest.org/arpio/docreflect v0.0.0-20250904132730-afd27063724e/go.mod h1:/3xQI36oJG8qLBxT2fSS61P5/+i1T64fTX9GHRh8XhA=
 code.squareroundforest.org/arpio/docreflect v0.0.0-20251031192707-01c5ff18fab1 h1:bJi41U5yGQykg6jVlD2AdWiznvx3Jg7ZpzEU85syOXw=
 code.squareroundforest.org/arpio/docreflect v0.0.0-20251031192707-01c5ff18fab1/go.mod h1:/3xQI36oJG8qLBxT2fSS61P5/+i1T64fTX9GHRh8XhA=
-code.squareroundforest.org/arpio/notation v0.0.0-20250826181910-5140794b16b2 h1:S4mjQHL70CuzFg1AGkr0o0d+4M+ZWM0sbnlYq6f0b3I=
+code.squareroundforest.org/arpio/html v0.0.0-20251103020946-e262eca50ac9 h1:b7voJlwe0jKH568X+O7b/JTAUrHLTSKNSSL+hhV2Q/Q=
-code.squareroundforest.org/arpio/notation v0.0.0-20250826181910-5140794b16b2/go.mod h1:ait4Fvg9o0+bq5hlxi9dAcPL5a+/sr33qsZPNpToMLY=
+code.squareroundforest.org/arpio/html v0.0.0-20251103020946-e262eca50ac9/go.mod h1:hq+2CENEd4bVSZnOdq38FUFOJJnF3OTQRv78qMGkNlE=
 code.squareroundforest.org/arpio/notation v0.0.0-20251101123932-5f5c05ee0239 h1:JvLVMuvF2laxXkIZbHC1/0xtKyKndAwIHbIIWkHqTzc=
 code.squareroundforest.org/arpio/notation v0.0.0-20251101123932-5f5c05ee0239/go.mod h1:ait4Fvg9o0+bq5hlxi9dAcPL5a+/sr33qsZPNpToMLY=
-code.squareroundforest.org/arpio/treerack v0.0.0-20250820014405-1d956dcc6610 h1:I0jebdyQQfqJcwq2lT/TkUPBU8secHa5xZ+VzOdYVsw=
+code.squareroundforest.org/arpio/textedit v0.0.0-20251207224821-c75c3965789f h1:gomu8xTD953IkL3M528qVEuZ2z93C2I6Hr4vyIwE7kI=
-code.squareroundforest.org/arpio/treerack v0.0.0-20250820014405-1d956dcc6610/go.mod h1:9XhPcVt1Y1M609z02lHvEcp00dwPD9NUCoVxS2TpcH8=
+code.squareroundforest.org/arpio/textedit v0.0.0-20251207224821-c75c3965789f/go.mod h1:nXdFdxdI69JrkIT97f+AEE4OgplmxbgNFZC5j7gsdqs=
+code.squareroundforest.org/arpio/textfmt v0.0.0-20251207234108-fed32c8bbe18 h1:2aa62CYm9ld5SNoFxWzE2wUN0xjVWQ+xieoeFantdg4=
+code.squareroundforest.org/arpio/textfmt v0.0.0-20251207234108-fed32c8bbe18/go.mod h1:+0G3gufMAP8SCEIrDT1D/DaVOSfjS8EwPTBs5vfxqQg=
 code.squareroundforest.org/arpio/treerack v0.0.0-20251031193114-4f1c219052ae h1:D28IunhepRhRSp3U2z84e3WtxbYMRzi/FwEEZg54ULM=
 code.squareroundforest.org/arpio/treerack v0.0.0-20251031193114-4f1c219052ae/go.mod h1:9XhPcVt1Y1M609z02lHvEcp00dwPD9NUCoVxS2TpcH8=
 github.com/iancoleman/strcase v0.3.0 h1:nTXanmYxhfFAMjZL34Ov6gkzEsSJZ5DbhxWjvSASxEI=
 github.com/iancoleman/strcase v0.3.0/go.mod h1:iwCmte+B7n89clKwxIoIXy/HfoL7AsD47ZCWhYzw7ho=
 golang.org/x/mod v0.27.0 h1:kb+q2PyFnEADO2IEF935ehFUXlWiNjJWtRNgBLSfbxQ=
 golang.org/x/mod v0.27.0/go.mod h1:rWI627Fq0DEoudcK+MBkNkCe0EetEaDSwJJkCcjpazc=
+golang.org/x/sys v0.38.0 h1:3yZWxaJjBmCWXqhN1qh02AkOnCQ1poK6oF+a7xWL6Gc=
+golang.org/x/sys v0.38.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
+golang.org/x/term v0.37.0 h1:8EGAD0qCmHYZg6J17DvsMy9/wJ7/D/4pV/wfnld5lTU=
+golang.org/x/term v0.37.0/go.mod h1:5pB4lxRNYYVZuTLmy8oR2BH8dflOR+IbTYFD8fi3254=

input.go

@@ -51,15 +51,9 @@ func validateEnv(cmd Cmd, e env) error {
 }
 
 func validateOptions(cmd Cmd, o []option, conf Config) error {
-	ms := make(map[string]string)
-	ml := make(map[string]string)
-	for i := 0; i < len(cmd.shortForms); i += 2 {
-		s, l := cmd.shortForms[i], cmd.shortForms[i+1]
-		ms[s] = l
-		ml[l] = s
-	}
-
 	var names []string
+	ms := shortFormsToLong(cmd.shortForms)
+	ml := longFormsToShort(cmd.shortForms)
 	mo := make(map[string][]option)
 	for _, oi := range o {
 		n := oi.name
@@ -81,7 +75,7 @@ func validateOptions(cmd Cmd, o []option, conf Config) error {
 	for _, n := range names {
 		os := mo[n]
 		en := "--" + n
-		if sn, ok := ml[n]; ok {
+		for _, sn := range ml[n] {
 			en += ", -" + sn
 		}
 

internal/tests/testlib/lib.go

@@ -6,12 +6,30 @@ import (
 )
 
 type Options struct {
+
+	// Foo is an option.
 	Foo int
+
+	// Bars, any number.
+	Bar []string
+
+	// Duration is another option.
 	Duration time.Duration
+
+	// Time is the third option here.
 	Time time.Time
 }
 
+type OptionWithHelp struct {
+
+	// Custom help.
+	Help bool
+}
+
 // Foo sums three numbers.
+// It prints the sum to stdout.
+//
+// The input numbers can be any integer.
 func Foo(a, b, c int) int {
 	return a + b + c
 }
@@ -23,3 +41,5 @@ func Bar(out io.Writer, a, b, c int) int {
 func Baz(o Options) int {
 	return o.Foo
 }
+
+func CustomHelp(o OptionWithHelp) {}

output_test.go

@@ -1,10 +1,10 @@
 package wand
 
 import (
+	"bytes"
+	"io"
 	"testing"
 	"time"
-	"io"
-	"bytes"
 )
 
 func TestOutput(t *testing.T) {

reflect.go

@@ -115,6 +115,15 @@ func isTime(t reflect.Type) bool {
 	return t.ConvertibleTo(reflect.TypeFor[time.Time]())
 }
 
+func isDuration(t reflect.Type) bool {
+	if t == nil {
+		return false
+	}
+
+	t = unpackType(t)
+	return t == reflect.TypeFor[time.Duration]()
+}
+
 func isStruct(t reflect.Type) bool {
 	if t == nil {
 		return false
@@ -254,7 +263,7 @@ func positionalIndices(f any) []int {
 	t := r.Type()
 	for i := 0; i < t.NumIn(); i++ {
 		p := t.In(i)
-		if isTime(p) || isStruct(p) || isReader(p) || isWriter(p) {
+		if isStruct(p) || isReader(p) || isWriter(p) {
 			continue
 		}
 
@@ -279,12 +288,23 @@ func bindable(t reflect.Type) bool {
 	return bindable
 }
 
+func scalarTypeStringOf(t reflect.Type) string {
+	if t == nil {
+		return ""
+	}
+
+	t = unpackType(t)
+	return scalarTypeString(bind.FieldType(t.Kind()))
+}
+
 func scalarTypeString(t bind.FieldType) string {
 	switch t {
 	case bind.Duration:
 		return "duration"
 	case bind.Time:
 		return "time"
+	case reflect.Interface:
+		return "any"
 	default:
 		return strings.ToLower(reflect.Kind(t).String())
 	}

reflect_test.go

@@ -195,12 +195,12 @@ func TestReflect(t *testing.T) {
 	t.Run("indices of positional parameters", func(t *testing.T) {
 		t.Run(
 			"show function params",
-			testExec(testCase{impl: testlib.Foo, command: "foo help", contains: true}, "", "foo help"),
+			testExec(testCase{impl: testlib.Foo, command: "foo help", contains: true}, "", "foo [options]... [--] <a int> <b int> <c int>"),
 		)
 
 		t.Run(
 			"skip non-positional params",
-			testExec(testCase{impl: testlib.Bar, command: "bar help", contains: true}, "", "bar help"),
+			testExec(testCase{impl: testlib.Bar, command: "bar help", contains: true}, "", "bar [options]... [--] <a int> <b int> <c int>"),
 		)
 	})
 
@@ -210,7 +210,6 @@ func TestReflect(t *testing.T) {
 			testExec(
 				testCase{impl: testlib.Baz, command: "baz help", contains: true},
 				"",
-				"baz help",
 				"--foo int",
 			),
 		)

tools/exec.go

@@ -2,6 +2,7 @@ package tools
 
 import (
 	"bytes"
+	"fmt"
 	"io"
 	"os"
 	"os/exec"
@@ -19,6 +20,10 @@ func execc(stdin io.Reader, stdout, stderr io.Writer, command string, args []str
 }
 
 func execCommandDir(out io.Writer, commandDir string, env ...string) error {
+	if len(commandDir) > 0 && commandDir[0] != '/' && commandDir[0] != '.' {
+		commandDir = fmt.Sprintf("./%s", commandDir)
+	}
+
 	stderr := bytes.NewBuffer(nil)
 	if err := execc(nil, out, stderr, "go run", []string{commandDir}, env); err != nil {
 		io.Copy(os.Stderr, stderr)

tools/lib.go

@@ -6,6 +6,11 @@ import (
 	"io"
 )
 
+type ManOptions struct {
+	DateString string
+	Version    string
+}
+
 type MarkdownOptions struct {
 	Level int
 }
@@ -14,10 +19,21 @@ func Docreflect(out io.Writer, packageName string, gopaths ...string) error {
 	return generate.GenerateRegistry(out, packageName, gopaths...)
 }
 
-func Man(out io.Writer, commandDir string) error {
+func Man(out io.Writer, o ManOptions, commandDir string) error {
-	return execCommandDir(out, commandDir, "_wandgenerate=man")
+	return execCommandDir(
+		out,
+		commandDir,
+		"_wandgenerate=man",
+		fmt.Sprintf("_wandgeneratedate=%s", o.DateString),
+		fmt.Sprintf("_wandgenerateversion=%s", o.Version),
+	)
 }
 
 func Markdown(out io.Writer, o MarkdownOptions, commandDir string) error {
-	return execCommandDir(out, commandDir, "_wandgenerate=markdown", fmt.Sprintf("_wandmarkdownlevel=%d", o.Level))
+	return execCommandDir(
+		out,
+		commandDir,
+		"_wandgenerate=markdown",
+		fmt.Sprintf("_wandmarkdownlevel=%d", o.Level),
+	)
 }