tests: Skip tests if they will fail because of outer repo

For different reasons these tests will fail if run in a tmpdir which is in a hg
repo.

The following three tests assumes no .hg in path dirs - I don't know how to
work around that:

* test-dispatch explicitly tests for no repo and expects "abort: There is no
Mercurial repository here (.hg not found)!"

* test-extension expects parentui to be None when not cd'ed to a repo dir

* test-globalopts tests that implicit -R works correctly - that could perhaps be
done from another repo instead of assuming no repo

The following two might be worth investigating further:

* test-convert-svn-sink fails for unknown reasons, starting with "abort:
unresolved merge conflicts (see hg resolve)"

* test-glog gets strange failures when testing "from outer space"

tests/hghave

@@ -154,6 +154,9 b' def has_pygments():'
     except ImportError:
         return False
 
+def has_outer_repo():
+    return matchoutput('hg root 2>&1', r'')
+
 checks = {
     "baz": (has_baz, "GNU Arch baz client"),
     "bzr": (has_bzr, "Canonical's Bazaar client"),
@@ -169,6 +172,7 b' checks = {'
     "inotify": (has_inotify, "inotify extension support"),
     "lsprof": (has_lsprof, "python lsprof module"),
     "mtn": (has_mtn, "monotone client (> 0.31)"),
+    "outer-repo": (has_outer_repo, "outer repo"),
     "pygments": (has_pygments, "Pygments source highlighting library"),
     "svn": (has_svn, "subversion client and admin tools"),
     "svn-bindings": (has_svn_bindings, "subversion python bindings"),

tests/test-convert-svn-sink

@@ -1,6 +1,6 b''
 #!/bin/sh
 
-"$TESTDIR/hghave" svn svn-bindings || exit 80
+"$TESTDIR/hghave" svn svn-bindings no-outer-repo || exit 80
 
 fixpath()
 {

tests/test-dispatch

@@ -1,6 +1,8 b''
 #!/bin/sh
 # test command parsing and dispatch
 
+"$TESTDIR/hghave" no-outer-repo || exit 80
+
 hg init a
 cd a
 echo a > a

tests/test-extension

@@ -1,6 +1,8 b''
 #!/bin/sh
 # Test basic extension support
 
+"$TESTDIR/hghave" no-outer-repo || exit 80
+
 cat > foobar.py <<EOF
 import os
 from mercurial import commands

tests/test-globalopts

@@ -1,5 +1,7 b''
 #!/bin/sh
 
+"$TESTDIR/hghave" no-outer-repo || exit 80
+
 hg init a
 cd a
 echo a > a

tests/test-glog

@@ -70,6 +70,8 b''
 # |/
 # o  (0) root
 
+"$TESTDIR/hghave" no-outer-repo || exit 80
+
 set -e
 
 commit()