tests/test-pushvars.t

rust-cpython: rename PyLeakedRef to PyLeaked

This series will make PyLeaked* behave more like a Python iterator, which
means mutation of the owner object will be allowed and the leaked reference
(i.e. the iterator) will be invalidated instead.

I'll add PyLeakedRef/PyLeakedRefMut structs which will represent a "borrowed"
state, and prevent the underlying value from being mutably borrowed while the
leaked reference is in use:

  let shared = self.inner_shared(py);
  let leaked = shared.leak_immutable();
  {
      let leaked_ref: PyLeakedRef<_> = leaked.borrow(py);
      shared.borrow_mut();  // panics since the underlying value is borrowed
  }
  shared.borrow_mut();  // allowed

The relation between PyLeaked* structs is quite similar to RefCell/Ref/RefMut,
but the implementation can't be reused because the borrowing state will have
to be shared across objects having no lifetime relation.

PyLeaked isn't named as PyLeakedCell since it isn't actually a cell in that
leaked.borrow_mut() will require &mut self.

Setup

  $ PYTHONPATH=$TESTDIR/..:$PYTHONPATH
  $ export PYTHONPATH

  $ cat > $TESTTMP/pretxnchangegroup.sh << EOF
  > #!/bin/sh
  > env | egrep "^HG_USERVAR_(DEBUG|BYPASS_REVIEW)" | sort
  > exit 0
  > EOF
  $ cat >> $HGRCPATH << EOF
  > [hooks]
  > pretxnchangegroup = sh $TESTTMP/pretxnchangegroup.sh
  > EOF

  $ hg init repo
  $ hg clone -q repo child
  $ cd child

Test pushing vars to repo with pushvars.server not set

  $ echo b > a
  $ hg commit -Aqm a
  $ hg push --pushvars "DEBUG=1" --pushvars "BYPASS_REVIEW=true"
  pushing to $TESTTMP/repo
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files

Setting pushvars.sever = true and then pushing.

  $ echo [push] >> $HGRCPATH
  $ echo "pushvars.server = true" >> $HGRCPATH
  $ echo b >> a
  $ hg commit -Aqm a
  $ hg push --pushvars "DEBUG=1" --pushvars "BYPASS_REVIEW=true"
  pushing to $TESTTMP/repo
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  HG_USERVAR_BYPASS_REVIEW=true
  HG_USERVAR_DEBUG=1
  added 1 changesets with 1 changes to 1 files

Test pushing var with empty right-hand side

  $ echo b >> a
  $ hg commit -Aqm a
  $ hg push --pushvars "DEBUG="
  pushing to $TESTTMP/repo
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  HG_USERVAR_DEBUG=
  added 1 changesets with 1 changes to 1 files

Test pushing bad vars

  $ echo b >> a
  $ hg commit -Aqm b
  $ hg push --pushvars "DEBUG"
  pushing to $TESTTMP/repo
  searching for changes
  abort: unable to parse variable 'DEBUG', should follow 'KEY=VALUE' or 'KEY=' format
  [255]