packaging: introduce Python3 support as buildrpm --python3 Just overrule the HGPYTHON3 warning.

packaging: be explicit about Python version in rpm spec Fedora 31 has Python3 at /usr/bin/python ... but expect everybody to not just find python in $PATH but be explicit about whether they want python2 or python3. mercurial.spec just used 'python' and would fail when it unknowingly used Python 3 and ended up with Mercurial setup.py reporting "Python 3.7 detected." and talking about the HGPYTHON3 environment variable. For now, just be explicit about using system python2 as python executable when building rpms.

packaging: make python snippets in rpm building python3 compatible Fedora 31 has Python3 at /usr/bin/python, and buildrpm would fail on snippets that use python2 syntax. Instead of forcing python2, just accept for the future while staying backwards compatible.

py3: fix patchbomb to accept non-ASCII header value for email preview Since mail.headencode() is disabled by -n/--test, non-ASCII header value has to be allowed. Spotted by Denis Laxalde.

tests: check patchbomb with a non-ascii commit message This fails on Python 3 but gets fixed in the next changeset.

formatter: fix handling of None value in templater mapping For historical reasons, None in mapping dict means there's no such keyword, and falls back to b"". That's fine in log templates where mapping item is generally a callable returning a value (which may be None,) but the formatter directly puts an "evaluated" value in the mapping. So the None value has to be lifted to wrappedvalue(None) to avoid confusion in the template engine.

config: add support for defaultvalue of list of printable elements

config: fix -Tjson to not crash due to unsupported defaultvalue types Maybe it isn't great to ignore unsupported types at all, but otherwise "hg config -Tjson" would crash.

tests: handle Message-Id email header possible wrapping The "Message-Id" header will get wrapped with a new line when exceeding 75 characters on Python 3 (see changeset 7d4f2e4899c5 introducing usage of email.header.Header.encode and respective doc). This will occur in an unpredictable manner depending on the hostname's length. To make the test output consistent across Python versions and hostname configuration, we add a filter to unwrap this header value.

py3: leverage pycompat.long

packaging: remove version info from Breaks+Replaces in Debian package The versioned Breaks: and Replaces: cause problem when trying to install our package over the one in Debian. $ sudo apt install ./packages/debian-buster/mercurial_5.2~rc0+15-buster-a2ff3aff81d2_amd64.deb Reading package lists... Done Building dependency tree Reading state information... Done Note, selecting 'mercurial' instead of './packages/debian-buster/mercurial_5.2~rc0+15-buster-a2ff3aff81d2_amd64.deb' Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: mercurial : Breaks: mercurial-common (< 5.2~rc0+15-buster-a2ff3aff81d2) but 5.2~rc0-1 is to be installed E: Unable to correct problems, you have held broken packages. Removing version information resolves the situation.

py3: fix generated non-ascii message in test-notify.t The resulting "Subject:" header contains an encoded word in Python 3 so we have to add distinct outputs for Python 3 but underlying values are the same: >>> from email.header import decode_header >>> decode_header('=?utf-8?b?w6AuLi4=?=') [(b'\xc3\xa0...', 'utf-8')]

py3: decode encoding literal before passing to .decode() bytes.decode(<encoding>) wants an str as "encoding" parameter, it raises a TypeError if given a bytestring. encoding.encoding and encoding.fallbackencoding are bytes values.

py3: decode payload of notify email This fixes one UnicodeEncodeError in test-notify.t:422 when testing the notify hook with non-ascii content (there are more later). We only decode on Python 3, since it's not safe for sure on Python 2.

py3: decode email headers with mail.headdecode() in notify extension