test-rebase-interruptions: stabilize for Windows

External hooks end up launching cmd.exe, which knows nothing about $VAR syntax.
For some reason, I thought that Mercurial would substitute in the value, in
order to paper over the platform difference.  But I can't find that in the
documentation, and there's at least one other use of this pattern [1].

[1] https://www.mercurial-scm.org/repo/hg/file/tip/tests/test-histedit-fold.t#l477

tests/test-rebase-interruptions.t

@@ -1,460 +1,465 b''
   $ cat >> $HGRCPATH <<EOF
   > [extensions]
   > rebase=
   > 
   > [phases]
   > publish=False
   > 
   > [alias]
   > tglog = log -G --template "{rev}: '{desc}' {branches}\n"
   > tglogp = log -G --template "{rev}:{phase} '{desc}' {branches}\n"
   > EOF
 
 
   $ hg init a
   $ cd a
 
   $ echo A > A
   $ hg ci -Am A
   adding A
 
   $ echo B > B
   $ hg ci -Am B
   adding B
 
   $ echo C >> A
   $ hg ci -m C
 
   $ hg up -q -C 0
 
   $ echo D >> A
   $ hg ci -m D
   created new head
 
   $ echo E > E
   $ hg ci -Am E
   adding E
 
   $ cd ..
 
 
 Changes during an interruption - continue:
 
   $ hg clone -q -u . a a1
   $ cd a1
 
   $ hg tglog
   @  4: 'E'
   |
   o  3: 'D'
   |
   | o  2: 'C'
   | |
   | o  1: 'B'
   |/
   o  0: 'A'
   
 Rebasing B onto E:
 
   $ hg rebase -s 1 -d 4
   rebasing 1:27547f69f254 "B"
   rebasing 2:965c486023db "C"
   merging A
   warning: conflicts while merging A! (edit, then use 'hg resolve --mark')
   unresolved conflicts (see hg resolve, then hg rebase --continue)
   [1]
 
 Force a commit on C during the interruption:
 
   $ hg up -q -C 2 --config 'extensions.rebase=!'
 
   $ echo 'Extra' > Extra
   $ hg add Extra
   $ hg ci -m 'Extra' --config 'extensions.rebase=!'
 
 Force this commit onto secret phase
 
   $ hg phase --force --secret 6
 
   $ hg tglogp
   @  6:secret 'Extra'
   |
   | o  5:draft 'B'
   | |
   | o  4:draft 'E'
   | |
   | o  3:draft 'D'
   | |
   o |  2:draft 'C'
   | |
   o |  1:draft 'B'
   |/
   o  0:draft 'A'
   
 Resume the rebasing:
 
   $ hg rebase --continue
   already rebased 1:27547f69f254 "B" as 45396c49d53b
   rebasing 2:965c486023db "C"
   merging A
   warning: conflicts while merging A! (edit, then use 'hg resolve --mark')
   unresolved conflicts (see hg resolve, then hg rebase --continue)
   [1]
 
 Solve the conflict and go on:
 
   $ echo 'conflict solved' > A
   $ rm A.orig
   $ hg resolve -m A
   (no more unresolved files)
   continue: hg rebase --continue
 
   $ hg rebase --continue
   already rebased 1:27547f69f254 "B" as 45396c49d53b
   rebasing 2:965c486023db "C"
   warning: new changesets detected on source branch, not stripping
 
   $ hg tglogp
   o  7:draft 'C'
   |
   | o  6:secret 'Extra'
   | |
   o |  5:draft 'B'
   | |
   @ |  4:draft 'E'
   | |
   o |  3:draft 'D'
   | |
   | o  2:draft 'C'
   | |
   | o  1:draft 'B'
   |/
   o  0:draft 'A'
   
   $ cd ..
 
 
 Changes during an interruption - abort:
 
   $ hg clone -q -u . a a2
   $ cd a2
 
   $ hg tglog
   @  4: 'E'
   |
   o  3: 'D'
   |
   | o  2: 'C'
   | |
   | o  1: 'B'
   |/
   o  0: 'A'
   
 Rebasing B onto E:
 
   $ hg rebase -s 1 -d 4
   rebasing 1:27547f69f254 "B"
   rebasing 2:965c486023db "C"
   merging A
   warning: conflicts while merging A! (edit, then use 'hg resolve --mark')
   unresolved conflicts (see hg resolve, then hg rebase --continue)
   [1]
 
 Force a commit on B' during the interruption:
 
   $ hg up -q -C 5 --config 'extensions.rebase=!'
 
   $ echo 'Extra' > Extra
   $ hg add Extra
   $ hg ci -m 'Extra' --config 'extensions.rebase=!'
 
   $ hg tglog
   @  6: 'Extra'
   |
   o  5: 'B'
   |
   o  4: 'E'
   |
   o  3: 'D'
   |
   | o  2: 'C'
   | |
   | o  1: 'B'
   |/
   o  0: 'A'
   
 Abort the rebasing:
 
   $ hg rebase --abort
   warning: new changesets detected on destination branch, can't strip
   rebase aborted
 
   $ hg tglog
   @  6: 'Extra'
   |
   o  5: 'B'
   |
   o  4: 'E'
   |
   o  3: 'D'
   |
   | o  2: 'C'
   | |
   | o  1: 'B'
   |/
   o  0: 'A'
   
   $ cd ..
 
 Changes during an interruption - abort (again):
 
   $ hg clone -q -u . a a3
   $ cd a3
 
   $ hg tglogp
   @  4:draft 'E'
   |
   o  3:draft 'D'
   |
   | o  2:draft 'C'
   | |
   | o  1:draft 'B'
   |/
   o  0:draft 'A'
   
 Rebasing B onto E:
 
   $ hg rebase -s 1 -d 4
   rebasing 1:27547f69f254 "B"
   rebasing 2:965c486023db "C"
   merging A
   warning: conflicts while merging A! (edit, then use 'hg resolve --mark')
   unresolved conflicts (see hg resolve, then hg rebase --continue)
   [1]
 
 Change phase on B and B'
 
   $ hg up -q -C 5 --config 'extensions.rebase=!'
   $ hg phase --public 1
   $ hg phase --public 5
   $ hg phase --secret -f 2
 
   $ hg tglogp
   @  5:public 'B'
   |
   o  4:public 'E'
   |
   o  3:public 'D'
   |
   | o  2:secret 'C'
   | |
   | o  1:public 'B'
   |/
   o  0:public 'A'
   
 Abort the rebasing:
 
   $ hg rebase --abort
   warning: can't clean up public changesets 45396c49d53b
   rebase aborted
 
   $ hg tglogp
   @  5:public 'B'
   |
   o  4:public 'E'
   |
   o  3:public 'D'
   |
   | o  2:secret 'C'
   | |
   | o  1:public 'B'
   |/
   o  0:public 'A'
   
 Test rebase interrupted by hooks
 
   $ hg up 2
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ echo F > F
   $ hg add F
   $ hg ci -m F
 
   $ cd ..
 
 (precommit version)
 
   $ cp -R a3 hook-precommit
   $ cd hook-precommit
   $ hg rebase --source 2 --dest 5 --tool internal:other --config 'hooks.precommit=hg status | grep "M A"'
   rebasing 2:965c486023db "C"
   M A
   rebasing 6:a0b2430ebfb8 "F" (tip)
   abort: precommit hook exited with status 1
   [255]
   $ hg tglogp
   @  7:secret 'C'
   |
   | @  6:secret 'F'
   | |
   o |  5:public 'B'
   | |
   o |  4:public 'E'
   | |
   o |  3:public 'D'
   | |
   | o  2:secret 'C'
   | |
   | o  1:public 'B'
   |/
   o  0:public 'A'
   
   $ hg rebase --continue
   already rebased 2:965c486023db "C" as 401ccec5e39f
   rebasing 6:a0b2430ebfb8 "F"
   saved backup bundle to $TESTTMP/hook-precommit/.hg/strip-backup/965c486023db-aa6250e7-backup.hg (glob)
   $ hg tglogp
   @  6:secret 'F'
   |
   o  5:secret 'C'
   |
   o  4:public 'B'
   |
   o  3:public 'E'
   |
   o  2:public 'D'
   |
   | o  1:public 'B'
   |/
   o  0:public 'A'
   
   $ cd ..
 
 (pretxncommit version)
 
   $ cp -R a3 hook-pretxncommit
   $ cd hook-pretxncommit
-  $ hg rebase --source 2 --dest 5 --tool internal:other --config 'hooks.pretxncommit=hg log -r $HG_NODE | grep "summary:     C"'
+#if windows
+  $ NODE="%HG_NODE%"
+#else
+  $ NODE="\$HG_NODE"
+#endif
+  $ hg rebase --source 2 --dest 5 --tool internal:other --config "hooks.pretxncommit=hg log -r $NODE | grep \"summary:     C\""
   rebasing 2:965c486023db "C"
   summary:     C
   rebasing 6:a0b2430ebfb8 "F" (tip)
   transaction abort!
   rollback completed
   abort: pretxncommit hook exited with status 1
   [255]
   $ hg tglogp
   @  7:secret 'C'
   |
   | @  6:secret 'F'
   | |
   o |  5:public 'B'
   | |
   o |  4:public 'E'
   | |
   o |  3:public 'D'
   | |
   | o  2:secret 'C'
   | |
   | o  1:public 'B'
   |/
   o  0:public 'A'
   
   $ hg rebase --continue
   already rebased 2:965c486023db "C" as 401ccec5e39f
   rebasing 6:a0b2430ebfb8 "F"
   saved backup bundle to $TESTTMP/hook-pretxncommit/.hg/strip-backup/965c486023db-aa6250e7-backup.hg (glob)
   $ hg tglogp
   @  6:secret 'F'
   |
   o  5:secret 'C'
   |
   o  4:public 'B'
   |
   o  3:public 'E'
   |
   o  2:public 'D'
   |
   | o  1:public 'B'
   |/
   o  0:public 'A'
   
   $ cd ..
 
 (pretxnclose version)
 
   $ cp -R a3 hook-pretxnclose
   $ cd hook-pretxnclose
   $ hg rebase --source 2 --dest 5 --tool internal:other --config 'hooks.pretxnclose=hg log -r tip | grep "summary:     C"'
   rebasing 2:965c486023db "C"
   summary:     C
   rebasing 6:a0b2430ebfb8 "F" (tip)
   transaction abort!
   rollback completed
   abort: pretxnclose hook exited with status 1
   [255]
   $ hg tglogp
   @  7:secret 'C'
   |
   | @  6:secret 'F'
   | |
   o |  5:public 'B'
   | |
   o |  4:public 'E'
   | |
   o |  3:public 'D'
   | |
   | o  2:secret 'C'
   | |
   | o  1:public 'B'
   |/
   o  0:public 'A'
   
   $ hg rebase --continue
   already rebased 2:965c486023db "C" as 401ccec5e39f
   rebasing 6:a0b2430ebfb8 "F"
   saved backup bundle to $TESTTMP/hook-pretxnclose/.hg/strip-backup/965c486023db-aa6250e7-backup.hg (glob)
   $ hg tglogp
   @  6:secret 'F'
   |
   o  5:secret 'C'
   |
   o  4:public 'B'
   |
   o  3:public 'E'
   |
   o  2:public 'D'
   |
   | o  1:public 'B'
   |/
   o  0:public 'A'
   
   $ cd ..
 
 Make sure merge state is cleaned up after a no-op rebase merge (issue5494)
   $ hg init repo
   $ cd repo
   $ echo a > a
   $ hg commit -qAm base
   $ echo b >> a
   $ hg commit -qm b
   $ hg up '.^'
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo c >> a
   $ hg commit -qm c
   $ hg rebase -s 1 -d 2 --noninteractive
   rebasing 1:fdaca8533b86 "b"
   merging a
   warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
   unresolved conflicts (see hg resolve, then hg rebase --continue)
   [1]
   $ echo a > a
   $ echo c >> a
   $ hg resolve --mark a
   (no more unresolved files)
   continue: hg rebase --continue
   $ hg rebase --continue
   rebasing 1:fdaca8533b86 "b"
   note: rebase of 1:fdaca8533b86 created no changes to commit
   saved backup bundle to $TESTTMP/repo/.hg/strip-backup/fdaca8533b86-7fd70513-backup.hg (glob)
   $ hg resolve --list
   $ test -f .hg/merge
   [1]