Embed man page in the binary and show it on 'fzf --man'

main.go

@@ -2,8 +2,10 @@ package main
 
 import (
 	_ "embed"
+	"errors"
 	"fmt"
 	"os"
+	"os/exec"
 	"strings"
 
 	fzf "github.com/junegunn/fzf/src"
@@ -28,6 +30,9 @@ var zshCompletion []byte
 //go:embed shell/key-bindings.fish
 var fishKeyBindings []byte
 
+//go:embed man/man1/fzf.1
+var manPage []byte
+
 func printScript(label string, content []byte) {
 	fmt.Println("### " + label + " ###")
 	fmt.Println(strings.TrimSpace(string(content)))
@@ -76,6 +81,18 @@ func main() {
 		}
 		return
 	}
+	if options.Man {
+		file := fzf.WriteTemporaryFile([]string{string(manPage)}, "\n")
+		if len(file) == 0 {
+			exit(fzf.ExitError, errors.New("failed to display man page"))
+			return
+		}
+		defer os.Remove(file)
+		cmd := exec.Command("man", file)
+		cmd.Stdout = os.Stdout
+		cmd.Run()
+		return
+	}
 
 	code, err := fzf.Run(options)
 	exit(code, err)

src/functions.go

@@ -6,7 +6,7 @@ import (
 	"unsafe"
 )
 
-func writeTemporaryFile(data []string, printSep string) string {
+func WriteTemporaryFile(data []string, printSep string) string {
 	f, err := os.CreateTemp("", "fzf-temp-*")
 	if err != nil {
 		// Unable to create temporary file

src/options.go

@@ -387,6 +387,7 @@ type Options struct {
 	Bash         bool
 	Zsh          bool
 	Fish         bool
+	Man          bool
 	Fuzzy        bool
 	FuzzyAlgo    algo.Algo
 	Scheme       string
@@ -493,6 +494,7 @@ func defaultOptions() *Options {
 		Bash:         false,
 		Zsh:          false,
 		Fish:         false,
+		Man:          false,
 		Fuzzy:        true,
 		FuzzyAlgo:    algo.FuzzyMatchV2,
 		Scheme:       "default",
@@ -1865,10 +1867,14 @@ func parseOptions(opts *Options, allArgs []string) error {
 		opts.Fish = false
 		opts.Help = false
 		opts.Version = false
+		opts.Man = false
 	}
 	for i := 0; i < len(allArgs); i++ {
 		arg := allArgs[i]
 		switch arg {
+		case "--man":
+			clearExitingOpts()
+			opts.Man = true
 		case "--bash":
 			clearExitingOpts()
 			opts.Bash = true

src/proxy.go

@@ -98,7 +98,7 @@ func runProxy(commandPrefix string, cmdBuilder func(temp string) *exec.Cmd, opts
 			exports[idx] = fmt.Sprintf("export %s=%s", pair[0], escapeSingleQuote(pair[1]))
 		}
 	}
-	temp := writeTemporaryFile(append(exports, command), "\n")
+	temp := WriteTemporaryFile(append(exports, command), "\n")
 	defer os.Remove(temp)
 
 	cmd := cmdBuilder(temp)

src/terminal.go

@@ -2840,7 +2840,7 @@ func replacePlaceholder(params replacePlaceholderParams) (string, []string) {
 		}
 
 		if flags.file {
-			file := writeTemporaryFile(replacements, params.printsep)
+			file := WriteTemporaryFile(replacements, params.printsep)
 			tempFiles = append(tempFiles, file)
 			return file
 		}