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genbindings: generate multiple files in one run, cache clang ast files

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mappu 2024-08-14 17:43:54 +12:00
parent 7f552ee6a4
commit 944e04bf5d
2 changed files with 89 additions and 60 deletions
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cmd/genbindings/cachedir/.create_dir Normal file
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149
cmd/genbindings/main.go
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@ -14,88 +14,117 @@ func main() {
ctx := context.Background()
clang := flag.String("clang", "clang", "Custom path to clang")
inputHeader := flag.String("inputHeader", `/usr/include/x86_64-linux-gnu/qt5/QtWidgets/qpushbutton.h`, "Input file")
cflags := flag.String("cflags", `-DQT_WIDGETS_LIB -I/usr/include/x86_64-linux-gnu/qt5/QtWidgets -I/usr/include/x86_64-linux-gnu/qt5 -I/usr/include/x86_64-linux-gnu/qt5/QtCore -DQT_GUI_LIB -I/usr/include/x86_64-linux-gnu/qt5/QtGui -DQT_CORE_LIB`, "Cflags to pass to clang (e.g. `pkg-config --cflags Qt5Widgets`)")
outDir := flag.String("outdir", "../../qt", "Output directory for generated gen_** files")
dumpClang := flag.String("dumpclang", "", "(Optional) File to dump output clang JSON")
dumpIL := flag.String("dumpil", "", "(Optional) File to dump intermediate IL JSON")
flag.Parse()
// Parse the file
astInner, err := clangExec(ctx, *clang, *inputHeader, strings.Fields(*cflags))
if err != nil {
panic(err)
includeFiles := []string{
"/usr/include/x86_64-linux-gnu/qt5/QtWidgets/qwidget.h",
"/usr/include/x86_64-linux-gnu/qt5/QtWidgets/qabstractbutton.h",
"/usr/include/x86_64-linux-gnu/qt5/QtWidgets/qpushbutton.h",
}
if *dumpClang != "" {
jb, err := json.MarshalIndent(astInner, "", "\t")
for _, inputHeader := range includeFiles {
// If we have a cached clang AST, use that instead
cacheFile := filepath.Join("cachedir", strings.Replace(inputHeader, `/`, `__`, -1)+".json")
astJson, err := ioutil.ReadFile(cacheFile)
var astInner []interface{} = nil
if err != nil {
// Nonexistent cache file, regenerate from clang
log.Printf("No AST cache for file %q, running clang...", filepath.Base(inputHeader))
// Parse the file
astInner, err = clangExec(ctx, *clang, inputHeader, strings.Fields(*cflags))
if err != nil {
panic(err)
}
// Write to cache
jb, err := json.MarshalIndent(astInner, "", "\t")
if err != nil {
panic(err)
}
err = ioutil.WriteFile(cacheFile, jb, 0644)
if err != nil {
panic(err)
}
} else {
log.Printf("Reused cache AST for file %q", filepath.Base(inputHeader))
// Json decode
err = json.Unmarshal(astJson, &astInner)
if err != nil {
panic(err)
}
}
// Convert it to our intermediate format
parsed, err := parseHeader(astInner)
if err != nil {
panic(err)
}
err = ioutil.WriteFile(*dumpClang, jb, 0644)
if err != nil {
panic(err)
if *dumpIL != "" {
jb, err := json.MarshalIndent(parsed, "", "\t")
if err != nil {
panic(err)
}
err = ioutil.WriteFile(*dumpIL, jb, 0644)
if err != nil {
panic(err)
}
}
}
// Convert it to our intermediate format
parsed, err := parseHeader(astInner)
if err != nil {
panic(err)
}
// AST transforms on our IL
astTransformOptional(parsed)
astTransformOverloads(parsed)
if *dumpIL != "" {
jb, err := json.MarshalIndent(parsed, "", "\t")
// Emit 3 code files from the intermediate format
outputName := filepath.Join(*outDir, "gen_"+strings.TrimSuffix(filepath.Base(inputHeader), `.h`))
goSrc, err := emitGo(parsed, filepath.Base(inputHeader))
if err != nil {
panic(err)
}
err = ioutil.WriteFile(*dumpIL, jb, 0644)
err = ioutil.WriteFile(outputName+".go", []byte(goSrc), 0644)
if err != nil {
panic(err)
}
bindingCppSrc, err := emitBindingCpp(parsed, filepath.Base(inputHeader))
if err != nil {
panic(err)
}
err = ioutil.WriteFile(outputName+".cpp", []byte(bindingCppSrc), 0644)
if err != nil {
panic(err)
}
bindingHSrc, err := emitBindingHeader(parsed, filepath.Base(inputHeader))
if err != nil {
panic(err)
}
err = ioutil.WriteFile(outputName+".h", []byte(bindingHSrc), 0644)
if err != nil {
panic(err)
}
// Done
log.Printf("Processing %q completed", inputHeader)
}
// AST transforms on our IL
astTransformOptional(parsed)
astTransformOverloads(parsed)
// Emit 3 code files from the intermediate format
outputName := filepath.Join(*outDir, "gen_"+strings.TrimSuffix(filepath.Base(*inputHeader), `.h`))
goSrc, err := emitGo(parsed, filepath.Base(*inputHeader))
if err != nil {
panic(err)
}
err = ioutil.WriteFile(outputName+".go", []byte(goSrc), 0644)
if err != nil {
panic(err)
}
bindingCppSrc, err := emitBindingCpp(parsed, filepath.Base(*inputHeader))
if err != nil {
panic(err)
}
err = ioutil.WriteFile(outputName+".cpp", []byte(bindingCppSrc), 0644)
if err != nil {
panic(err)
}
bindingHSrc, err := emitBindingHeader(parsed, filepath.Base(*inputHeader))
if err != nil {
panic(err)
}
err = ioutil.WriteFile(outputName+".h", []byte(bindingHSrc), 0644)
if err != nil {
panic(err)
}
// Done
log.Printf("Processing %q completed", *inputHeader)
log.Printf("Processing %d file(s) completed", len(includeFiles))
}