// allow invocation from test
func MainArgs(args []string) {
//fmt.Println(os.Args)
os.Args = args
flag.Usage = use
if len(os.Args) < 2 {
use()
}
flag.CommandLine = flag.NewFlagSet(os.Args[0], flag.ExitOnError)
debug := flag.Bool("debug", false, "print lots of debug info as we process.")
outdir := flag.String("o", "odir", "specify output directory")
pkg := flag.String("p", "main", "specify package for generated code")
privs := flag.Bool("X", false, "export private as well as public struct fields")
overwrite := flag.Bool("OVERWRITE", false, "replace named .go files with capid tagged versions.")
flag.Parse()
if debug != nil {
bam.Verbose = *debug
}
if outdir == nil || *outdir == "" {
fmt.Fprintf(os.Stderr, "required -o option missing. Use bambam -o <dirname> myfile.go # to specify the output directory.\n")
use()
}
if !bam.DirExists(*outdir) {
err := os.MkdirAll(*outdir, 0755)
if err != nil {
panic(err)
}
}
if pkg == nil || *pkg == "" {
fmt.Fprintf(os.Stderr, "required -p option missing. Specify a package name for the generated go code with -p <pkgname>\n")
use()
}
// all the rest are input .go files
inputFiles := flag.Args()
if len(inputFiles) == 0 {
fmt.Fprintf(os.Stderr, "bambam needs at least one .go golang source file to process specified on the command line.\n")
os.Exit(1)
}
for _, fn := range inputFiles {
if !strings.HasSuffix(fn, ".go") && !strings.HasSuffix(fn, ".go.txt") {
fmt.Fprintf(os.Stderr, "error: bambam input file '%s' did not end in '.go' or '.go.txt'.\n", fn)
os.Exit(1)
}
}
x := bam.NewExtractor()
x.FieldPrefix = " "
x.FieldSuffix = "\n"
x.OutDir = *outdir
if privs != nil {
x.ExtractPrivate = *privs
}
if overwrite != nil {
x.Overwrite = *overwrite
}
for _, inFile := range inputFiles {
_, err := x.ExtractStructsFromOneFile(nil, inFile)
if err != nil {
panic(err)
}
}
// get rid of default tmp dir
x.CompileDir = bam.NewTempDir()
x.CompileDir.Cleanup()
x.CompileDir.DirPath = *outdir
x.PkgName = *pkg
schemaFN := x.CompileDir.DirPath + "/schema.capnp"
schemaFile, err := os.Create(schemaFN)
if err != nil {
panic(err)
}
defer schemaFile.Close()
by := x.GenCapnpHeader()
schemaFile.Write(by.Bytes())
_, err = x.WriteToSchema(schemaFile)
if err != nil {
panic(err)
}
fmt.Fprintf(schemaFile, "\n")
fmt.Fprintf(schemaFile, "##compile with:\n\n##\n##\n## capnp compile -ogo %s\n\n", schemaFN)
// translator library of go functions is separate from the schema
translateFn := x.CompileDir.DirPath + "/translateCapn.go"
translatorFile, err := os.Create(translateFn)
if err != nil {
panic(err)
}
defer translatorFile.Close()
fmt.Fprintf(translatorFile, `package %s
import (
capn "github.com/glycerine/go-capnproto"
"io"
)
`, x.PkgName)
_, err = x.WriteToTranslators(translatorFile)
if err != nil {
panic(err)
}
err = x.CopySourceFilesAddCapidTag()
if err != nil {
panic(err)
}
exec.Command("cp", "-p", "go.capnp", x.CompileDir.DirPath).Run()
fmt.Printf("generated files in '%s'\n", x.CompileDir.DirPath)
}
func main() {
flag.Parse()
flag.Usage = use
if *source == "" {
use()
}
source := *source
sourceName := strings.TrimSuffix(source, ".capnp")
pkg, err := build.Import(SELF_PKG_NAME, "./", build.FindOnly)
if err != nil {
fmt.Println("Failed to detect self package location:", err)
os.Exit(1)
}
capsSchemaPath := fmt.Sprintf("-I%s/..", pkg.Dir)
goSchemaPath := fmt.Sprintf("-I%s/vendor/github.com/glycerine/go-capnproto", pkg.Dir)
capnpArgs := []string{capsSchemaPath, goSchemaPath, "compile", "-opgo"}
sourceData, err := ioutil.ReadFile(source)
if err != nil {
fmt.Println("Failed to read schema file:", err)
os.Exit(1)
}
sourceContent := string(sourceData)
// Remove comments
re := regexp.MustCompile("(?s)#.*?\n")
cleanContent := re.ReplaceAllString(sourceContent, "\n")
// Find codec annotations
capnpGen := capnpRe.MatchString(cleanContent)
msgpGen := msgpRe.MatchString(cleanContent)
if capnpGen {
capnpArgs = append(capnpArgs, "-ogo")
}
if *outdir != "." {
if !bam.DirExists(*outdir) {
err := os.MkdirAll(*outdir, 0755)
if err != nil {
fmt.Println("Failed to create output dir:", err)
os.Exit(1)
}
}
for i := 0; i < len(capnpArgs); i++ {
capnpArgs[i] += *outdir
}
}
capnpArgs = append(capnpArgs, source)
// Generate plain Go code
cmd := exec.Command("capnp", capnpArgs...)
cmd.Stderr = os.Stderr
cmd.Stdout = os.Stdout
if *verbose {
fmt.Printf("Executing: %q\n", strings.Join(cmd.Args, " "))
}
err = cmd.Run()
if err != nil {
fmt.Println("Failed to run Plain go code generator:", err)
os.Exit(1)
}
// Generate Msgp code
if msgpGen {
inFilename := filepath.Join(*outdir, sourceName+".go")
outFilename := filepath.Join(*outdir, sourceName+".msgp.go")
cmd = exec.Command("msgp", "-o="+outFilename, "-tests=false", "-file="+inFilename)
cmd.Stderr = os.Stderr
if *verbose {
cmd.Stdout = os.Stdout
fmt.Printf("Executing: %q\n", strings.Join(cmd.Args, " "))
}
err = cmd.Run()
if err != nil {
fmt.Println("Failed to run Msgp go code generator:", err)
os.Exit(1)
}
}
}