tests/test-gpg.t

tests: restore the ability to run `black` on Windows

The hghave test for black silently stopped working with the change in
08fd76a553c9.  This was the output of what it was hitting when run in the test
environment:

    Traceback (most recent call last):\r (esc)
       File "c:\\users\\matt\\appdata\\local\\programs\\python\\python39\\lib\\runpy.py", line 197, in _run_module_as_main\r (esc)
         return _run_code(code, main_globals, None,\r (esc)
       File "c:\\users\\matt\\appdata\\local\\programs\\python\\python39\\lib\\runpy.py", line 87, in _run_code\r (esc)
         exec(code, run_globals)\r (esc)
       File "c:\\Users\\Matt\\AppData\\Roaming\\Python\\Python39\\Scripts\\black.exe\\__main__.py", line 4, in <module>\r (esc)
       File "C:\\Users\\Matt\\AppData\\Roaming\\Python\\Python39\\site-packages\\black\\__init__.py", line 70, in <module>\r (esc)
         CACHE_DIR = Path(user_cache_dir("black", version=__version__))\r (esc)
       File "C:\\Users\\Matt\\AppData\\Roaming\\Python\\Python39\\site-packages\\appdirs.py", line 293, in user_cache_dir\r (esc)
         path = os.path.normpath(_get_win_folder("CSIDL_LOCAL_APPDATA"))\r (esc)
       File "C:\\Users\\Matt\\AppData\\Roaming\\Python\\Python39\\site-packages\\appdirs.py", line 481, in _get_win_folder_with_pywin32\r (esc)
         dir = shell.SHGetFolderPath(0, getattr(shellcon, csidl_name), 0, 0)\r (esc)
     pywintypes.com_error: (-2147024893, '$ENOTDIR$.', None, None)\r (esc)
     [1]

Differential Revision: https://phab.mercurial-scm.org/D10310

#require gpg

Test the GPG extension

  $ cat <<EOF >> $HGRCPATH
  > [extensions]
  > gpg=
  > 
  > [gpg]
  > cmd=gpg --no-permission-warning --no-secmem-warning --no-auto-check-trustdb
  > EOF
  $ GNUPGHOME="$TESTTMP/gpg"; export GNUPGHOME
  $ cp -R "$TESTDIR/gpg" "$GNUPGHOME"

Start gpg-agent, which is required by GnuPG v2

#if gpg21
  $ gpg-connect-agent -q --subst /serverpid '/echo ${get serverpid}' /bye \
  > >> $DAEMON_PIDS
#endif

and migrate secret keys

#if gpg2
  $ gpg --no-permission-warning --no-secmem-warning --list-secret-keys \
  > > /dev/null 2>&1
#endif

  $ hg init r
  $ cd r
  $ echo foo > foo
  $ hg ci -Amfoo
  adding foo

  $ hg sigs

  $ HGEDITOR=cat hg sign -e 0
  gpg: error retrieving key fingerprint from card: Invalid name (?)
  signing 0:e63c23eaa88a
  Added signature for changeset e63c23eaa88a
  
  
  HG: Enter commit message.  Lines beginning with 'HG:' are removed.
  HG: Leave message empty to abort commit.
  HG: --
  HG: user: test
  HG: branch 'default'
  HG: added .hgsigs

  $ hg sigs
  hgtest                             0:e63c23eaa88ae77967edcf4ea194d31167c478b0

  $ hg sigcheck 0
  e63c23eaa88a is signed by:
   hgtest

  $ cd ..