run-tests: write out scripts in binary mode Caught because Python 3 refuses to write bytes to a non-binary fd.

match: use util.re.escape instead of re.escape For a pathological .hgignore with over 2500 glob lines and over 200000 calls to re.escape, and with re2 available, this speeds up parsing the .hgignore from 0.75 seconds to 0.20 seconds. This causes e.g. 'hg status' with hgwatchman enabled to go from 1.02 seconds to 0.47 seconds.

util.re: add an escape method The escape method in at least one of the modules called 're2' is in C. This means it is significantly faster than the Python code written in 're'. An upcoming patch will have benchmarks.

util.re: move check for re2 into a separate method We're going to use the same check for another method in an upcoming patch.

util: remove no longer used compilere

commands: use util.re.compile instead of util.compilere

config: use util.re.compile instead of util.compilere

match: use util.re.compile instead of util.compilere

util: move compilere to a class We do this to allow us to use descriptors for other related methods. For now, util.compilere does the same thing. Upcoming patches will remove it.

util: rename 're' to 'remod' Upcoming patches will introduce a binding called 're'.

bundle2-push: drop _pushbundle2extraparts All core user are now using the new way. We drop the old way.

bundle2-test: use the new way to extend push content The only core user of the old way were tests. We update them.

bundle2-push: introduce a list of part generating functions Instead of explicitly calling a few function to generate part in the bundle, we now have a list of all part generators. This should make it easier for extensions to adds new part in the bundle. This new way to extend the push deprecates the old `_pushbundle2extraparts` way.

bundle2-push: move changegroup push validation inside _pushb2ctx When bundle2 push includes more than just changesets, we may have no changegroup to push yet still have other data to push. So we now try to performs a bundle2 push in all cases. The check for changegroup inclusion is moved into the ``_pushb2ctx`` function in charge of creating the changegroup part. The bundle2 part is aborted if no actual payload part have been added to the bundle2.

push: use `stepsdone` to control changegroup push through bundle10 or bundle20 We use the newly introduced `pushop.stepsdone` attribute to inform older methods than changegroup have already been pushed using a newer method.