// Copyright 2015 The go-python Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. package main import ( "fmt" "io/ioutil" "log" "os" "os/exec" "path/filepath" "github.com/gonuts/commander" "github.com/gonuts/flag" ) func gopyMakeCmdBind() *commander.Command { cmd := &commander.Command{ Run: gopyRunCmdBind, UsageLine: "bind ", Short: "generate and compile (C)Python language bindings for Go", Long: ` bind generates and compiles (C)Python language bindings for a Go package. ex: $ gopy bind [options] $ gopy bind github.com/go-python/gopy/_examples/hi `, Flag: *flag.NewFlagSet("gopy-bind", flag.ExitOnError), } cmd.Flag.String("lang", defaultPyVersion, "python version to use for bindings (python2|py2|python3|py3)") cmd.Flag.String("output", "", "output directory for bindings") return cmd } func gopyRunCmdBind(cmdr *commander.Command, args []string) error { var err error if len(args) != 1 { log.Printf("expect a fully qualified go package name as argument\n") return fmt.Errorf( "gopy-bind: expect a fully qualified go package name as argument", ) } odir := cmdr.Flag.Lookup("output").Value.Get().(string) lang := cmdr.Flag.Lookup("lang").Value.Get().(string) cwd, err := os.Getwd() if err != nil { log.Fatal(err) } if odir == "" { odir = cwd } else { err = os.MkdirAll(odir, 0755) if err != nil { return fmt.Errorf( "gopy-bind: could not create output directory: %v\n", err, ) } } odir, err = filepath.Abs(odir) if err != nil { return err } path := args[0] pkg, err := newPackage(path) if err != nil { return fmt.Errorf( "gopy-bind: go/build.Import failed with path=%q: %v\n", path, err, ) } // go-get it to tickle the GOPATH cache (and make sure it compiles // correctly) cmd := exec.Command( "go", "get", "-buildmode=c-shared", pkg.ImportPath(), ) cmd.Stdin = os.Stdin cmd.Stdout = os.Stdout cmd.Stderr = os.Stderr err = cmd.Run() if err != nil { return err } work, err := ioutil.TempDir("", "gopy-") if err != nil { return fmt.Errorf("gopy-bind: could not create temp-workdir (%v)", err) } log.Printf("work: %s\n", work) err = os.MkdirAll(work, 0644) if err != nil { return fmt.Errorf("gopy-bind: could not create workdir (%v)", err) } //defer os.RemoveAll(work) err = genPkg(work, pkg, lang) if err != nil { return err } err = genPkg(work, pkg, "go") if err != nil { return err } wbind, err := ioutil.TempDir("", "gopy-") if err != nil { return fmt.Errorf("gopy-bind: could not create temp-workdir (%v)", err) } err = os.MkdirAll(wbind, 0644) if err != nil { return fmt.Errorf("gopy-bind: could not create workdir (%v)", err) } defer os.RemoveAll(wbind) cmd = exec.Command( "go", "build", "-buildmode=c-shared", "-o", filepath.Join(wbind, pkg.Name())+".so", ".", ) cmd.Dir = work cmd.Stdin = os.Stdin cmd.Stdout = os.Stdout cmd.Stderr = os.Stderr err = cmd.Run() if err != nil { return err } cmd = exec.Command( "/bin/cp", filepath.Join(wbind, pkg.Name())+".so", filepath.Join(odir, pkg.Name())+".so", ) cmd.Stdin = os.Stdin cmd.Stdout = os.Stdout cmd.Stderr = os.Stderr err = cmd.Run() if err != nil { return err } return err }