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rust-cpython: mark all PyLeaked methods as unsafe...
rust-cpython: mark all PyLeaked methods as unsafe Unfortunately, these methods can be abused to obtain the inner 'static reference. The simplest (pseudo-code) example is: let leaked: PyLeaked<&'static _> = shared.leak_immutable(); let static_ref: &'static _ = &*leaked.try_borrow(py)?; // PyLeakedRef::deref() tries to bound the lifetime to itself, but // the underlying data is a &'static reference, so the returned // reference can be &'static. This problem can be easily fixed by coercing the lifetime, but there are many other ways to achieve that, and there wouldn't be a generic solution: let leaked: PyLeaked<&'static [_]> = shared.leak_immutable(); let leaked_iter: PyLeaked<slice::Iter<'static, _>> = unsafe { leaked.map(|v| v.iter()) }; let static_slice: &'static [_] = leaked_iter.try_borrow(py)?.as_slice(); So basically I failed to design the safe borrowing interface. Maybe we'll instead have to add much more restricted interface on top of the unsafe PyLeaked methods? For instance, Iterator::next() could be implemented if its Item type is not &'a (where 'a may be cheated.) Anyway, this seems not an easy issue, so it's probably better to leave the current interface as unsafe, and get broader comments while upstreaming this feature.
Mads Kiilerich - - Load All Authors

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r43676:e66a3bfc stable
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Gregory Szorc
packaging: move some docker scripts into contrib/packaging/...
 r38024 #!/bin/bash -e
BUILDDIR=$(dirname $0)
export ROOTDIR=$(cd $BUILDDIR/../..; pwd)
PLATFORM="$1"
shift # extra params are passed to buildrpm
Mads Kiilerich
packaging: make dockerrpm fedora target more generic...
 r43676 DOCKERFILE="$PLATFORM"
OS_RELEASE="${PLATFORM//[a-z]/}"
case "$PLATFORM" in
fedora*)
DOCKERFILE="${PLATFORM//[0-9]/}.template"
;;
esac
Gregory Szorc
packaging: replace dockerlib.sh with a Python script...
 r38476 DOCKER=$($BUILDDIR/hg-docker docker-path)
CONTAINER=hg-docker-$PLATFORM
Mathias De Mare
packaging: allow running packaging with custom uid+gid for CentOS...
 r41270 if [[ -z "${HG_DOCKER_OWN_USER}" ]]; then
DOCKERUID=1000
DOCKERGID=1000
else
DOCKERUID=$(id -u)
DOCKERGID=$(id -g)
fi
Mads Kiilerich
packaging: make dockerrpm fedora target more generic...
 r43676 $BUILDDIR/hg-docker build \
--build-arg UID=$DOCKERUID \
--build-arg GID=$DOCKERGID \
--build-arg OS_RELEASE=${OS_RELEASE:-latest} \
$BUILDDIR/docker/$DOCKERFILE $CONTAINER
Gregory Szorc
packaging: move some docker scripts into contrib/packaging/...
 r38024
RPMBUILDDIR=$ROOTDIR/packages/$PLATFORM
Mads Kiilerich
packaging: move dockerrpm output directory creation to dockerrpm...
 r43672 mkdir -p $RPMBUILDDIR
Gregory Szorc
packaging: make packaging scripts less reliant on pwd...
 r38033 $ROOTDIR/contrib/packaging/buildrpm --rpmbuilddir $RPMBUILDDIR --prepare $*
Gregory Szorc
packaging: move some docker scripts into contrib/packaging/...
 r38024
DSHARED=/mnt/shared
Gregory Szorc
packaging: consistently create build user in Dockerfiles...
 r38475 DBUILDUSER=build
Gregory Szorc
packaging: move some docker scripts into contrib/packaging/...
 r38024 $DOCKER run -e http_proxy -e https_proxy -u $DBUILDUSER --rm -v $RPMBUILDDIR:$DSHARED $CONTAINER \
rpmbuild --define "_topdir $DSHARED" -ba $DSHARED/SPECS/mercurial.spec --clean
$DOCKER run -e http_proxy -e https_proxy -u $DBUILDUSER --rm -v $RPMBUILDDIR:$DSHARED $CONTAINER \
createrepo $DSHARED
cat << EOF > $RPMBUILDDIR/mercurial.repo
# Place this file in /etc/yum.repos.d/mercurial.repo
[mercurial]
name=Mercurial packages for $PLATFORM
# baseurl=file://$RPMBUILDDIR/
baseurl=http://hg.example.com/build/$PLATFORM/
skip_if_unavailable=True
gpgcheck=0
enabled=1
EOF
echo
echo "Build complete - results can be found in $RPMBUILDDIR"