Update Python, Django support matrix#647
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Signed-off-by: Stephen Finucane <stephen@that.guru>
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We also change our testing matrix so that we only test the upper and lower bounds of supported Python releases. This should ease pressure on CI somewhat. We also switch from the deprecated psycopg2 to psycopg (which actually corresponds to v3 now). Changes to the source were auto-generated with django-upgrade. Signed-off-by: Stephen Finucane <stephen@that.guru>
psycopg (v3) strictly rejects NUL bytes (0x00) in PostgreSQL text fields, unlike psycopg2 which handled them silently. Malformed emails (such as the codec-null.mbox fuzz fixture in our test suite) contain NUL bytes in headers and body content, causing DataError on insert. Strip NUL bytes from all text fields before they reach the database. This is safe for all fields: * Headers are restricted to printable ASCII by RFC 5322 meaning NUL bytes there always indicate corruption * Email body / commit message content is plain text so NUL bytes are equally invalid here * Unified diffs should also never contain NUL bytes. Git uses their presence as the heuristic to classify a file as binary, at which point it either emits 'Binary files ... differ' or, with --binary, a base85-encoded binary patch, both of which are entirely printable ASCII. A legitimate patch produced by git format-patch will therefore never carry NUL bytes in the diff text itself. Signed-off-by: Stephen Finucane <stephen@that.guru>
Only run on pushes to main and stable branches. Signed-off-by: Stephen Finucane <stephen@that.guru>
Generated with: reno report --branch $branch --stop-at-branch-base --no-show-source where $branch was the respective stable branch. This allows us to tag and delete these old branches. Signed-off-by: Stephen Finucane <stephen@that.guru>
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