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Viewing changes to lib/lp/soyuz/model/sourcepackagerelease.py

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lib/lp/soyuz/model/sourcepackagerelease.py
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    ]
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import apt_pkg
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import datetime
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from debian.changelog import (
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    Changelog,
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    ChangelogCreateError,
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    ChangelogParseError,
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    )
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import operator
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import re
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from StringIO import StringIO
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        return PackageDiff(
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            from_source=self, to_source=to_sourcepackagerelease,
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            requester=requester, status=status)
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    def aggregate_changelog(self, since_version):
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        """See `ISourcePackagePublishingHistory`."""
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        if self.changelog is None:
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            return None
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        apt_pkg.InitSystem()
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        chunks = []
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        changelog = self.changelog
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        # The python-debian API for parsing changelogs is pretty awful. The
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        # only useful way of extracting info is to use the iterator on
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        # Changelog and then compare versions.
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        try:
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            for block in Changelog(changelog.read()):
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                version = block._raw_version
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                if (since_version and
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                    apt_pkg.VersionCompare(version, since_version) <= 0):
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                    break
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                # Poking in private attributes is not nice but again the
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                # API is terrible.  We want to ensure that the name/date
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                # line is omitted from these composite changelogs.
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                block._no_trailer = True
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                try:
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                    # python-debian adds an extra blank line to the chunks
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                    # so we'll have to sort this out.
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                    chunks.append(str(block).rstrip())
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                except ChangelogCreateError:
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                    continue
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                if not since_version:
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                    # If a particular version was not requested we just
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                    # return the most recent changelog entry.
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                    break
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        except ChangelogParseError:
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            return None
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        output = "\n\n".join(chunks)
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        return output.decode("utf-8", "replace")