setuptools验证文件已修改

Question

我想添加一个具有扩展功能的build命令。具体来说，它编译了一个Go共享库。这是一个漫长的过程，而且Go源代码很少被修改。因此

问题

有没有办法让setuptools记住文件运行时的最后修改日期，或者我需要一个更重要的构建工具（比如SCons）。我不在乎它是否通过时间戳或任何其他简单的策略来识别最近性

---

以下是相关代码：

class BuildGo(build_py):
    '''
    Build Go bindings before building Python extension
    '''

    def run(self):
        # What should go into go_sources_modified?
        if self.go_sources_modified():
            self.compile_go()
        build_py.run(self)

    def compile_go(self):
        version = None
        refusal = 'Will not compile Go bindings'
        try:
            version = subprocess.check_output(['go', 'version'])
        except subprocess.CalledProcessError:
            print('Didn\'t find Go compiler.')
            print(refusal)
            return
        match = re.search(br'go(\d+)\.(\d+)\.(\d+)', version)
        if match:
            version = tuple(map(int, match.group(1, 2, 3)))
        else:
            print('Unrecognized version of Go compiler: {}'.format(version))
            print(refusal)
            return
        req_version = 1, 9, 1
        if version < req_version:
            print('You need Go compiler version higher than: {}'.format(
                req_version,
            ))
            print(refusal)
            return
        try:
            result = subprocess.check_output([
                'go',
                'build',
                '-v',
                '-buildmode=c-shared',
                '-o',
                SHLIB_LOCATION,
                SHLIB_PACKAGE,
            ])
            print(result)
        except subprocess.CalledProcessError as e:
            print(e.stderr)
            raise

Answer 1

您可以使用distutils.dep_util模块中的函数来检查自上次构建库以来是否修改了任何go源：

from distutils.dep_util import newer_group

class BuildGo(build_py):
    ...

    def go_sources_modified(self):
        gosrc = pathlib.Path('go/src/lib')
        go_sources = list(str(f.resolve()) for f in gosrc.rglob('*.go'))
        golib = 'go/pkg/mylib.a'
        return newer_group(go_sources, golib)