implement gencfg sub command

Author: tsingbx

.gitignore

@@ -8,6 +8,7 @@
 *.so
 *.dylib
 *.DS_Store
+*_autogen.go
 
 # Test binary, built with `go test -c`
 *.test

cmd/internal/base/base.go

@@ -33,17 +33,17 @@ type Command struct {
 	Run func(cmd *Command, args []string)
 
 	// UsageLine is the one-line usage message.
-	// The words between "gop" and the first flag or argument in the line are taken to be the command name.
+	// The words between "llcppg" and the first flag or argument in the line are taken to be the command name.
 	UsageLine string
 
-	// Short is the short description shown in the 'gop help' output.
+	// Short is the short description shown in the 'llcppg help' output.
 	Short string
 
 	// Flag is a set of flags specific to this command.
 	Flag flag.FlagSet
 
 	// Commands lists the available commands and help topics.
-	// The order here is the order in which they are printed by 'gop help'.
+	// The order here is the order in which they are printed by 'llcppg help'.
 	// Note that subcommands are in general best avoided.
 	Commands []*Command
 }
@@ -55,7 +55,7 @@ var Llcppg = &Command{
 	// Commands initialized in package main
 }
 
-// LongName returns the command's long name: all the words in the usage line between "gop" and a flag or argument,
+// LongName returns the command's long name: all the words in the usage line between "llcppg" and a flag or argument,
 func (c *Command) LongName() string {
 	name := c.UsageLine
 	if i := strings.Index(name, " ["); i >= 0 {

cmd/internal/base/pass.go

@@ -0,0 +1,17 @@
+package gencfg
+
+import "flag"
+
+var dependencies string
+var extsString string
+var excludes string
+var cpp, help, tab bool
+
+func addFlags(fs *flag.FlagSet) {
+	fs.BoolVar(&cpp, "cpp", false, "if it is C++ lib")
+	fs.BoolVar(&help, "help", false, "print help message")
+	fs.BoolVar(&tab, "tab", true, "generate .cfg config file with tab indent")
+	fs.StringVar(&excludes, "excludes", "", "exclude all header files in subdir of include expamle -excludes=\"internal impl\"")
+	fs.StringVar(&extsString, "exts", ".h", "extra include file extensions for example -exts=\".h .hpp .hh\"")
+	fs.StringVar(&dependencies, "deps", "", "deps for autofilling dependencies")
+}

cmd/internal/gencfg/flags.go

@@ -1,9 +1,11 @@
 package gencfg
 
 import (
-	"fmt"
+	"os"
+	"strings"
 
 	"github.com/goplus/llcppg/cmd/internal/base"
+	"github.com/goplus/llcppg/cmd/llcppcfg/gen"
 )
 
 var Cmd = &base.Command{
@@ -13,8 +15,41 @@ var Cmd = &base.Command{
 
 func init() {
 	Cmd.Run = runCmd
+	addFlags(&Cmd.Flag)
 }
 
 func runCmd(cmd *base.Command, args []string) {
-	fmt.Printf("todo generate llcpp.cfg")
+
+	if err := cmd.Flag.Parse(args); err != nil {
+		return
+	}
+
+	name := ""
+	if len(cmd.Flag.Args()) > 0 {
+		name = cmd.Flag.Arg(0)
+	}
+
+	exts := strings.Fields(extsString)
+	deps := strings.Fields(dependencies)
+
+	excludeSubdirs := []string{}
+	if len(excludes) > 0 {
+		excludeSubdirs = strings.Fields(excludes)
+	}
+	var flagMode gen.FlagMode
+	if cpp {
+		flagMode |= gen.WithCpp
+	}
+	if tab {
+		flagMode |= gen.WithTab
+	}
+	buf, err := gen.Do(gen.NewConfig(name, flagMode, exts, deps, excludeSubdirs))
+	if err != nil {
+		panic(err)
+	}
+	outFile := "./llcppg.cfg"
+	err = os.WriteFile(outFile, buf, 0600)
+	if err != nil {
+		panic(err)
+	}
 }

cmd/internal/gencfg/gencfg.go

@@ -16,5 +16,5 @@ func init() {
 }
 
 func runCmd(cmd *base.Command, args []string) {
-	fmt.Printf("todo genpkg")
+	fmt.Println("todo genpkg")
 }

cmd/internal/genpkg/genpkg.go

@@ -16,5 +16,5 @@ func init() {
 }
 
 func runCmd(cmd *base.Command, args []string) {
-	fmt.Printf("todo gensig")
+	fmt.Println("todo gensig")
 }

cmd/internal/gensig/gensig.go

@@ -16,5 +16,5 @@ func init() {
 }
 
 func runCmd(cmd *base.Command, args []string) {
-	fmt.Printf("todo gensym")
+	fmt.Println("todo gensym")
 }

cmd/internal/gensym/gensym.go

@@ -16,5 +16,5 @@ func init() {
 }
 
 func runCmd(cmd *base.Command, args []string) {
-	fmt.Printf("todo runtest")
+	fmt.Println("todo runtest")
 }

cmd/internal/runtest/runtest.go

@@ -16,5 +16,5 @@ func init() {
 }
 
 func runCmd(cmd *base.Command, args []string) {
-	fmt.Printf("todo print version")
+	fmt.Println("todo print version")
 }