func genPkg()

in cmd/gobind/gen.go [28:172]
141 lines of code
16 McCabe index (conditional complexity)

func genPkg(lang string, p *types.Package, astFiles []*ast.File, allPkg []*types.Package, classes []*java.Class, otypes []*objc.Named) {
	fname := defaultFileName(lang, p)
	conf := &bind.GeneratorConfig{
		Fset:   fset,
		Pkg:    p,
		AllPkg: allPkg,
	}
	var pname string
	if p != nil {
		pname = p.Name()
	} else {
		pname = "universe"
	}
	var buf bytes.Buffer
	generator := &bind.Generator{
		Printer: &bind.Printer{Buf: &buf, IndentEach: []byte("\t")},
		Fset:    conf.Fset,
		AllPkg:  conf.AllPkg,
		Pkg:     conf.Pkg,
		Files:   astFiles,
	}
	switch lang {
	case "java":
		g := &bind.JavaGen{
			JavaPkg:   *javaPkg,
			Generator: generator,
		}
		g.Init(classes)

		pkgname := bind.JavaPkgName(*javaPkg, p)
		pkgDir := strings.Replace(pkgname, ".", "/", -1)
		buf.Reset()
		w, closer := writer(filepath.Join("java", pkgDir, fname))
		processErr(g.GenJava())
		io.Copy(w, &buf)
		closer()
		for i, name := range g.ClassNames() {
			buf.Reset()
			w, closer := writer(filepath.Join("java", pkgDir, name+".java"))
			processErr(g.GenClass(i))
			io.Copy(w, &buf)
			closer()
		}
		buf.Reset()
		w, closer = writer(filepath.Join("src", "gobind", pname+"_android.c"))
		processErr(g.GenC())
		io.Copy(w, &buf)
		closer()
		buf.Reset()
		w, closer = writer(filepath.Join("src", "gobind", pname+"_android.h"))
		processErr(g.GenH())
		io.Copy(w, &buf)
		closer()
		// Generate support files along with the universe package
		if p == nil {
			dir, err := packageDir("golang.org/x/mobile/bind")
			if err != nil {
				errorf(`"golang.org/x/mobile/bind" is not found; run go get golang.org/x/mobile/bind: %v`, err)
				return
			}
			repo := filepath.Clean(filepath.Join(dir, "..")) // golang.org/x/mobile directory.
			for _, javaFile := range []string{"Seq.java"} {
				src := filepath.Join(repo, "bind/java/"+javaFile)
				in, err := os.Open(src)
				if err != nil {
					errorf("failed to open Java support file: %v", err)
				}
				defer in.Close()
				w, closer := writer(filepath.Join("java", "go", javaFile))
				defer closer()
				if _, err := io.Copy(w, in); err != nil {
					errorf("failed to copy Java support file: %v", err)
					return
				}
			}
			// Copy support files
			if err != nil {
				errorf("unable to import bind/java: %v", err)
				return
			}
			javaDir, err := packageDir("golang.org/x/mobile/bind/java")
			if err != nil {
				errorf("unable to import bind/java: %v", err)
				return
			}
			copyFile(filepath.Join("src", "gobind", "seq_android.c"), filepath.Join(javaDir, "seq_android.c.support"))
			copyFile(filepath.Join("src", "gobind", "seq_android.go"), filepath.Join(javaDir, "seq_android.go.support"))
			copyFile(filepath.Join("src", "gobind", "seq_android.h"), filepath.Join(javaDir, "seq_android.h"))
		}
	case "go":
		w, closer := writer(filepath.Join("src", "gobind", fname))
		conf.Writer = w
		processErr(bind.GenGo(conf))
		closer()
		w, closer = writer(filepath.Join("src", "gobind", pname+".h"))
		genPkgH(w, pname)
		io.Copy(w, &buf)
		closer()
		w, closer = writer(filepath.Join("src", "gobind", "seq.h"))
		genPkgH(w, "seq")
		io.Copy(w, &buf)
		closer()
		dir, err := packageDir("golang.org/x/mobile/bind")
		if err != nil {
			errorf("unable to import bind: %v", err)
			return
		}
		copyFile(filepath.Join("src", "gobind", "seq.go"), filepath.Join(dir, "seq.go.support"))
	case "objc":
		g := &bind.ObjcGen{
			Generator: generator,
			Prefix:    *prefix,
		}
		g.Init(otypes)
		w, closer := writer(filepath.Join("src", "gobind", pname+"_darwin.h"))
		processErr(g.GenGoH())
		io.Copy(w, &buf)
		closer()
		hname := strings.Title(fname[:len(fname)-2]) + ".objc.h"
		w, closer = writer(filepath.Join("src", "gobind", hname))
		processErr(g.GenH())
		io.Copy(w, &buf)
		closer()
		mname := strings.Title(fname[:len(fname)-2]) + "_darwin.m"
		w, closer = writer(filepath.Join("src", "gobind", mname))
		conf.Writer = w
		processErr(g.GenM())
		io.Copy(w, &buf)
		closer()
		if p == nil {
			// Copy support files
			dir, err := packageDir("golang.org/x/mobile/bind/objc")
			if err != nil {
				errorf("unable to import bind/objc: %v", err)
				return
			}
			copyFile(filepath.Join("src", "gobind", "seq_darwin.m"), filepath.Join(dir, "seq_darwin.m.support"))
			copyFile(filepath.Join("src", "gobind", "seq_darwin.go"), filepath.Join(dir, "seq_darwin.go.support"))
			copyFile(filepath.Join("src", "gobind", "ref.h"), filepath.Join(dir, "ref.h"))
			copyFile(filepath.Join("src", "gobind", "seq_darwin.h"), filepath.Join(dir, "seq_darwin.h"))
		}
	default:
		errorf("unknown target language: %q", lang)
	}
}