exchange: parse requirements from stream clone specification string
Stream clone bundles can only be consumed if the consumer supports the
exact format requirements that were present on the producer.
This patch adds support for encoding and verifying the format
requirements on the bundle specification string for a stream clone
bundle are supported by the local repository. If they aren't, we raise
an UnsupportedBundleSpecification, just like we do when an unknown
compression or bundle type is encountered.
The impetus for this patch is so the clone bundles manifest can
advertise stream clone bundles and so clients can filter out stream
clones with unsupported format requirements. e.g. a stream clone
produced with the not-yet-invented "revlogv2" format will be ignored by
clients that only support "revlogv1."
#require test-repo
$ import_checker="$TESTDIR"/../contrib/import-checker.py
Run the doctests from the import checker, and make sure
it's working correctly.
$ TERM=dumb
$ export TERM
$ python -m doctest $import_checker
Run additional tests for the import checker
$ mkdir testpackage
$ cat > testpackage/multiple.py << EOF
> from __future__ import absolute_import
> import os, sys
> EOF
$ cat > testpackage/unsorted.py << EOF
> from __future__ import absolute_import
> import sys
> import os
> EOF
$ cat > testpackage/stdafterlocal.py << EOF
> from __future__ import absolute_import
> from . import unsorted
> import os
> EOF
$ cat > testpackage/requirerelative.py << EOF
> from __future__ import absolute_import
> import testpackage.unsorted
> EOF
$ cat > testpackage/importalias.py << EOF
> from __future__ import absolute_import
> import ui
> EOF
$ cat > testpackage/relativestdlib.py << EOF
> from __future__ import absolute_import
> from .. import os
> EOF
$ cat > testpackage/symbolimport.py << EOF
> from __future__ import absolute_import
> from .unsorted import foo
> EOF
$ cat > testpackage/latesymbolimport.py << EOF
> from __future__ import absolute_import
> from . import unsorted
> from mercurial.node import hex
> EOF
$ cat > testpackage/multiplegroups.py << EOF
> from __future__ import absolute_import
> from . import unsorted
> from . import more
> EOF
$ mkdir testpackage/subpackage
$ cat > testpackage/subpackage/levelpriority.py << EOF
> from __future__ import absolute_import
> from . import foo
> from .. import parent
> EOF
$ cat > testpackage/sortedentries.py << EOF
> from __future__ import absolute_import
> from . import (
> foo,
> bar,
> )
> EOF
$ cat > testpackage/importfromalias.py << EOF
> from __future__ import absolute_import
> from . import ui
> EOF
$ cat > testpackage/importfromrelative.py << EOF
> from __future__ import absolute_import
> from testpackage.unsorted import foo
> EOF
$ python "$import_checker" testpackage/*.py testpackage/subpackage/*.py
testpackage/importalias.py ui module must be "as" aliased to uimod
testpackage/importfromalias.py ui from testpackage must be "as" aliased to uimod
testpackage/importfromrelative.py import should be relative: testpackage.unsorted
testpackage/importfromrelative.py direct symbol import from testpackage.unsorted
testpackage/latesymbolimport.py symbol import follows non-symbol import: mercurial.node
testpackage/multiple.py multiple imported names: os, sys
testpackage/multiplegroups.py multiple "from . import" statements
testpackage/relativestdlib.py relative import of stdlib module
testpackage/requirerelative.py import should be relative: testpackage.unsorted
testpackage/sortedentries.py imports from testpackage not lexically sorted: bar < foo
testpackage/stdafterlocal.py stdlib import follows local import: os
testpackage/subpackage/levelpriority.py higher-level import should come first: testpackage
testpackage/symbolimport.py direct symbol import from testpackage.unsorted
testpackage/unsorted.py imports not lexically sorted: os < sys
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$ cd "$TESTDIR"/..
There are a handful of cases here that require renaming a module so it
doesn't overlap with a stdlib module name. There are also some cycles
here that we should still endeavor to fix, and some cycles will be
hidden by deduplication algorithm in the cycle detector, so fixing
these may expose other cycles.
$ hg locate 'mercurial/**.py' 'hgext/**.py' | sed 's-\\-/-g' | python "$import_checker" -
Import cycle: hgext.largefiles.basestore -> hgext.largefiles.localstore -> hgext.largefiles.basestore
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