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sbinetsbinet
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all: add Windows CI support
Fixes sbinet#32.
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‎README.md

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=========
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[![Build Status](https://drone.io/github.com/sbinet/go-python/status.png)](https://drone.io/github.com/sbinet/go-python/latest)
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[![Build status](https://ci.appveyor.com/api/projects/status/n0ujg8no487a89vo/branch/master?svg=true)](https://ci.appveyor.com/project/sbinet/go-python/branch/master)
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Naive `go` bindings towards the C-API of CPython-2.
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‎appveyor.yml

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build: off
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clone_folder: c:\gopath\src\github.com\sbinet\go-python
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cache:
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- '%LocalAppData%\\go-build'
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- '%LocalAppData%\\pip'
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branches:
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only:
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- master
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environment:
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GOPATH: c:\gopath
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GOPY_APPVEYOR_CI: '1'
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GODEBUG: 'cgocheck=0'
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GOTRACEBACK: 'crash'
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PYTHONUNBUFFERED: "1"
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CPYTHON2DIR: "C:\\Python27-x64"
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PATH: '%GOPATH%\bin;%CPYTHON2DIR%;%CPYTHON2DIR%\\Scripts;C:\msys64\mingw64\bin;C:\msys64\usr\bin\;%PATH%'
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stack: go 1.11
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build_script:
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- "%CPYTHON2DIR%\\python --version"
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- go get -v -t ./...
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test_script:
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- go test ./...

‎cgoflags_windows.go

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package python
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5-
// #cgo CFLAGS: -IC:/Python27/include
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// #cgo LDFLAGS: -LC:/Python27/libs -lpython27
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// #cgo 386 CFLAGS: -I C:/Python27/include
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// #cgo amd64 CFLAGS: -I C:/Python27-x64/include
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// #cgo amd64 CFLAGS: -D MS_WIN64
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// #cgo 386 LDFLAGS: -L C:/Python27/libs -lpython27
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// #cgo amd64 LDFLAGS: -L C:/Python27-x64/libs -lpython27
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//
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// #include "go-python.h"
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import "C"

‎gen-cgoflags.go

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// +build ignore
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// simple command to generate CGOFLAGS for a given python VM
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package main
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import (
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"bytes"
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"encoding/json"
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"flag"
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"fmt"
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"io/ioutil"
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"log"
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"os"
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"os/exec"
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"runtime"
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"strings"
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"github.com/pkg/errors"
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)
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func main() {
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vm := flag.String("vm", "python", "path to a python VM")
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flag.Parse()
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if *vm == "" {
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log.Fatalf("need a python VM")
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}
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cfg, err := getPythonConfig(*vm)
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if err != nil {
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log.Fatalf("could not infer python configuration: %v", err)
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}
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oname := "cgoflags_unix.go"
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switch runtime.GOOS {
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case "windows":
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oname = "cgoflags_windows.go"
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}
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err = ioutil.WriteFile(oname, []byte(fmt.Sprintf(tmpl,
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cfg.cflags,
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cfg.ldflags,
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runtime.GOOS,
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)), 0644)
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if err != nil {
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log.Fatalf("could not write %q: %v", oname, err)
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}
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}
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// getPythonConfig returns the needed python configuration for the given
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// python VM (python, python2, python3, pypy, etc...)
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func getPythonConfig(vm string) (pyconfig, error) {
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code := `import sys
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import distutils.sysconfig as ds
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import json
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print(ds.get_config_vars())
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print(ds.get_python_lib())
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print(json.dumps({
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"version": sys.version_info.major,
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"prefix": ds.get_config_var("prefix"),
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"incdir": ds.get_python_inc(),
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"libdir": ds.get_config_var("LIBDIR"),
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"libdest": ds.get_config_var("LIBDEST"),
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"libpy": ds.get_config_var("LIBRARY"),
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"shlibs": ds.get_config_var("SHLIBS"),
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"syslibs": ds.get_config_var("SYSLIBS"),
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"shlinks": ds.get_config_var("LINKFORSHARED"),
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"DLLs": ds.get_config_var("DLLLIBRARY"),
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}))
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`
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var cfg pyconfig
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bin, err := exec.LookPath(vm)
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if err != nil {
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return cfg, errors.Wrapf(err, "could not locate python vm %q", vm)
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}
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buf := new(bytes.Buffer)
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cmd := exec.Command(bin, "-c", code)
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cmd.Stdin = os.Stdin
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cmd.Stdout = buf
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cmd.Stderr = os.Stderr
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err = cmd.Run()
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if err != nil {
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return cfg, errors.Wrap(err, "could not run python-config script")
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}
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log.Printf("distutils:\n%s", buf.String())
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var raw struct {
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Version int `json:"version"`
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IncDir string `json:"incdir"`
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LibDir string `json:"libdir"`
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LibPy string `json:"libpy"`
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ShLibs string `json:"shlibs"`
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SysLibs string `json:"syslibs"`
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}
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err = json.NewDecoder(buf).Decode(&raw)
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if err != nil {
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return cfg, errors.Wrapf(err, "could not decode JSON script output")
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}
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if strings.HasSuffix(raw.LibPy, ".a") {
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raw.LibPy = raw.LibPy[:len(raw.LibPy)-len(".a")]
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}
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if strings.HasPrefix(raw.LibPy, "lib") {
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raw.LibPy = raw.LibPy[len("lib"):]
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}
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cfg.version = raw.Version
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cfg.cflags = strings.Join([]string{
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"-I " + raw.IncDir,
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}, " ")
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cfg.ldflags = strings.Join([]string{
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"-L " + raw.LibDir,
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"-l " + raw.LibPy,
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raw.ShLibs,
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raw.SysLibs,
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}, " ")
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return cfg, nil
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}
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type pyconfig struct {
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version int
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cflags string
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ldflags string
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}
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const tmpl = `// Automatically generated. Do not edit.
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// +build %[3]s
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package python
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// #cgo %[3]s CFLAGS: %[1]s
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// #cgo %[3]s LDFLAGS: %[2]s
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//
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// #include "go-python.h"
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import "C"
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`

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