packaging.py 文件源码

def find_sources(self):
        """Generate SOURCES.txt only if there isn't one already.

        If we are in an sdist command, then we always want to update
        SOURCES.txt. If we are not in an sdist command, then it doesn't
        matter one flip, and is actually destructive.
        However, if we're in a git context, it's always the right thing to do
        to recreate SOURCES.txt
        """
        manifest_filename = os.path.join(self.egg_info, "SOURCES.txt")
        if (not os.path.exists(manifest_filename) or
                os.path.exists('.git') or
                'sdist' in sys.argv):
            log.info("[pbr] Processing SOURCES.txt")
            mm = LocalManifestMaker(self.distribution)
            mm.manifest = manifest_filename
            mm.run()
            self.filelist = mm.filelist
        else:
            log.info("[pbr] Reusing existing SOURCES.txt")
            self.filelist = egg_info.FileList()
            for entry in open(manifest_filename, 'r').read().split('\n'):
                self.filelist.append(entry)