CLI/git: change defaults for repo and prefix

The previous defaults were not suitable for personal (i.e. not
bugtracking for notmuch development) use.

Provide two ways for the user to select nmbug compatible defaults;
command line argument and checking the name of the script.

5 files changed, 162 insertions, 31 deletions

diff --git a/Makefile.local b/Makefile.local
index d2e0c7a8..7699c208 100644
--- a/Makefile.local
+++ b/Makefile.local
@@ -1,7 +1,7 @@
 # -*- makefile-gmake -*-
 
 .PHONY: all
-all: notmuch notmuch-shared build-man build-info ruby-bindings python-cffi-bindings notmuch-git
+all: notmuch notmuch-shared build-man build-info ruby-bindings python-cffi-bindings notmuch-git nmbug
 ifeq ($(MAKECMDGOALS),)
 ifeq ($(shell cat .first-build-message 2>/dev/null),)
 	@NOTMUCH_FIRST_BUILD=1 $(MAKE) --no-print-directory all
@@ -50,6 +50,10 @@ notmuch-git: notmuch-git.py
 	cp $< $@
 	chmod ugo+x $@
 
+CLEAN := $(CLEAN) nmbug
+nmbug: notmuch-git
+	ln -s $< $@
+
 .PHONY: dist
 dist: $(TAR_FILE)
 
diff --git a/doc/Makefile.local b/doc/Makefile.local
index d43ef269..2f67f4de 100644
--- a/doc/Makefile.local
+++ b/doc/Makefile.local
@@ -131,6 +131,7 @@ install-man: ${MAN_GZIP_FILES}
 	install -m0644 $(filter %.5.gz,$(MAN_GZIP_FILES)) $(DESTDIR)/$(mandir)/man5
 	install -m0644 $(filter %.7.gz,$(MAN_GZIP_FILES)) $(DESTDIR)/$(mandir)/man7
 	cd $(DESTDIR)/$(mandir)/man1 && ln -sf notmuch.1.gz notmuch-setup.1.gz
+	cd $(DESTDIR)/$(mandir)/man1 && ln -sf notmuch-git.1.gz nmbug.1.gz
 endif
 
 ifneq ($(HAVE_SPHINX)$(HAVE_MAKEINFO),11)
diff --git a/doc/man1/notmuch-git.rst b/doc/man1/notmuch-git.rst
index 86f246b6..6a2d7fcd 100644
--- a/doc/man1/notmuch-git.rst
+++ b/doc/man1/notmuch-git.rst
@@ -7,7 +7,9 @@ notmuch-git
 SYNOPSIS
 ========
 
-**notmuch** **git** [-h] [-C *repo*] [-p *prefix*] [-v] [-l *log level*] *subcommand*
+**notmuch** **git** [-h] [-N] [-C *repo*] [-p *prefix*] [-v] [-l *log level*] *subcommand*
+
+**nmbug** [-h] [-C *repo*] [-p *prefix*] [-v] [-l *log level*] *subcommand*
 
 DESCRIPTION
 ===========
@@ -25,12 +27,17 @@ Supported options for `notmuch git` include
 
    show help message and exit
 
+.. option:: -N, --nmbug
+
+   Set defaults for :option:`--tag-prefix` and :option:`--git-dir` suitable for the
+   :any:`notmuch` bug tracker
+
 .. option:: -C <repo>, --git-dir <repo>
 
    Operate on git repository *repo*. See :ref:`repo_location` for
    defaults.
 
-.. option::  -p <prefix>, --tag-prefix <prefix>
+.. option:: -p <prefix>, --tag-prefix <prefix>
 
    Operate only on tags with prefix *prefix*. See :ref:`prefix_val` for
    defaults.
@@ -239,6 +246,10 @@ value to locate the git repository.
 
 - Environment variable :envvar:`NOTMUCH_GIT_DIR`.
 
+- If invoked as `nmbug` or with the :option:`--nmbug` option,
+  :code:`$HOME/.nmbug`; otherwise
+  :code:`$XDG_DATA_HOME/notmuch/$NOTMUCH_PROFILE/git`.
+
 .. _prefix_val:
 
 PREFIX VALUE
@@ -251,9 +262,15 @@ value to define the tag prefix.
 
 - Environment variable :envvar:`NOTMUCH_GIT_PREFIX`.
 
+- If invoked as `nmbug` or with the :option:`--nmbug` option,
+  :code:`notmuch::`, otherwise the empty string.
+
 ENVIRONMENT
 ===========
 
+Variable :envvar:`NOTMUCH_PROFILE` influences :ref:`repo_location`.
+If it is unset, 'default' is assumed.
+
 .. envvar:: NOTMUCH_GIT_DIR
 
    Default location of git repository. Overriden by :option:`--git-dir`.
diff --git a/notmuch-git.py b/notmuch-git.py
index e419cdf7..9d5c7876 100644
--- a/notmuch-git.py
+++ b/notmuch-git.py
@@ -425,6 +425,13 @@ def init(remote=None):
     This wraps 'git init' with a few extra steps to support subsequent
     status and commit commands.
     """
+    from pathlib import Path
+    parent = Path(NOTMUCH_GIT_DIR).parent
+    try:
+        _os.makedirs(parent)
+    except FileExistsError:
+        pass
+
     _spawn(args=['git', '--git-dir', NOTMUCH_GIT_DIR, 'init',
                  '--initial-branch=master', '--quiet', '--bare'], wait=True)
     _git(args=['config', 'core.logallrefupdates', 'true'], wait=True)
@@ -861,9 +868,19 @@ def _notmuch_config_get(key):
         stdout=_subprocess.PIPE, wait=True)
     if status != 0:
         _LOG.error("failed to run notmuch config")
-        sys.exit(1)
+        _sys.exit(1)
     return stdout.rstrip()
 
+# based on BaseDirectory.save_data_path from pyxdg (LGPL2+)
+def xdg_data_path(profile):
+    resource = _os.path.join('notmuch',profile,'git')
+    assert not resource.startswith('/')
+    _home = _os.path.expanduser('~')
+    xdg_data_home = _os.environ.get('XDG_DATA_HOME') or \
+        _os.path.join(_home, '.local', 'share')
+    path = _os.path.join(xdg_data_home, resource)
+    return path
+
 if __name__ == '__main__':
     import argparse
 
@@ -875,9 +892,12 @@ if __name__ == '__main__':
         help='Git repository to operate on.')
     parser.add_argument(
         '-p', '--tag-prefix', metavar='PREFIX',
-        default = _os.getenv('NOTMUCH_GIT_PREFIX', 'notmuch::'),
+        default = None,
         help='Prefix of tags to operate on.')
     parser.add_argument(
+        '-N', '--nmbug', action='store_true',
+        help='Set defaults for --tag-prefix and --git-dir for the notmuch bug tracker')
+    parser.add_argument(
         '-l', '--log-level',
         choices=['critical', 'error', 'warning', 'info', 'debug'],
         help='Log verbosity.  Defaults to {!r}.'.format(
@@ -987,16 +1007,36 @@ if __name__ == '__main__':
 
     args = parser.parse_args()
 
+    nmbug_mode = False
+    notmuch_profile = _os.getenv('NOTMUCH_PROFILE','default')
+
+    if args.nmbug or _os.path.basename(__file__) == 'nmbug':
+        nmbug_mode = True
+
     if args.git_dir:
         NOTMUCH_GIT_DIR = args.git_dir
     else:
-        NOTMUCH_GIT_DIR = _os.path.expanduser(
-        _os.getenv('NOTMUCH_GIT_DIR', _os.path.join('~', '.nmbug')))
-        _NOTMUCH_GIT_DIR = _os.path.join(NOTMUCH_GIT_DIR, '.git')
-        if _os.path.isdir(_NOTMUCH_GIT_DIR):
-            NOTMUCH_GIT_DIR = _NOTMUCH_GIT_DIR
+        if nmbug_mode:
+            default = _os.path.join('~', '.nmbug')
+        else:
+            default = xdg_data_path(notmuch_profile)
+
+        NOTMUCH_GIT_DIR = _os.path.expanduser(_os.getenv('NOTMUCH_GIT_DIR', default))
+
+    _NOTMUCH_GIT_DIR = _os.path.join(NOTMUCH_GIT_DIR, '.git')
+    if _os.path.isdir(_NOTMUCH_GIT_DIR):
+        NOTMUCH_GIT_DIR = _NOTMUCH_GIT_DIR
+
+    if args.tag_prefix:
+        TAG_PREFIX = args.tag_prefix
+    else:
+        if nmbug_mode:
+            prefix = 'notmuch::'
+        else:
+            prefix = ''
+
+        TAG_PREFIX =  _os.getenv('NOTMUCH_GIT_PREFIX', prefix)
 
-    TAG_PREFIX = args.tag_prefix
     _ENCODED_TAG_PREFIX = _hex_quote(TAG_PREFIX, safe='+@=,')  # quote ':'
 
     if args.log_level:
@@ -1009,12 +1049,16 @@ if __name__ == '__main__':
 
     if _notmuch_config_get('built_with.sexp_queries') != 'true':
         _LOG.error("notmuch git needs sexp query support")
-        sys.exit(1)
+        _sys.exit(1)
 
     if not getattr(args, 'func', None):
         parser.print_usage()
         _sys.exit(1)
 
+    # The following two lines are used by the test suite.
+    _LOG.debug('prefix = {:s}'.format(TAG_PREFIX))
+    _LOG.debug('repository = {:s}'.format(NOTMUCH_GIT_DIR))
+
     if args.func == help:
         arg_names = ['command']
     else:
diff --git a/test/T850-git.sh b/test/T850-git.sh
index db76dae9..98233055 100755
--- a/test/T850-git.sh
+++ b/test/T850-git.sh
@@ -19,28 +19,28 @@ test_begin_subtest "clone"
 test_expect_success "notmuch git -p '' -C tags.git clone remote.git"
 
 test_begin_subtest "commit"
-notmuch git -C tags.git -p '' commit
+notmuch git -C tags.git commit
 git -C tags.git ls-tree -r --name-only HEAD | xargs dirname | sort -u | sed s,tags/,id:, > OUTPUT
 notmuch search --output=messages '*' | sort > EXPECTED
 test_expect_equal_file_nonempty EXPECTED OUTPUT
 
 test_begin_subtest "commit, with quoted tag"
-notmuch git -C clone2.git -p '' clone tags.git
+notmuch git -C clone2.git clone tags.git
 git -C clone2.git ls-tree -r --name-only HEAD | grep /inbox > BEFORE
 notmuch tag '+"quoted tag"' '*'
-notmuch git -C clone2.git -p '' commit
+notmuch git -C clone2.git commit
 notmuch tag '-"quoted tag"' '*'
 git -C clone2.git ls-tree -r --name-only HEAD | grep /inbox > AFTER
 test_expect_equal_file_nonempty BEFORE AFTER
 
 test_begin_subtest "commit (incremental)"
 notmuch tag +test id:20091117190054.GU3165@dottiness.seas.harvard.edu
-notmuch git -C tags.git -p '' commit
+notmuch git -C tags.git commit
 git -C tags.git ls-tree -r --name-only HEAD |
     grep 20091117190054 | sort > OUTPUT
 echo "--------------------------------------------------" >> OUTPUT
 notmuch tag -test id:20091117190054.GU3165@dottiness.seas.harvard.edu
-notmuch git -C tags.git -p '' commit
+notmuch git -C tags.git commit
 git -C tags.git ls-tree -r --name-only HEAD |
     grep 20091117190054 | sort >> OUTPUT
 cat <<EOF > EXPECTED
@@ -62,7 +62,7 @@ git -C tags.git ls-tree -r --name-only HEAD |
     grep 20091117190054 | sort > OUTPUT
 echo "--------------------------------------------------" >> OUTPUT
 notmuch tag -test::one id:20091117190054.GU3165@dottiness.seas.harvard.edu
-notmuch git -C tags.git -p '' commit
+notmuch git -C tags.git commit
 git -C tags.git ls-tree -r --name-only HEAD |
     grep 20091117190054 | sort >> OUTPUT
 cat <<EOF > EXPECTED
@@ -77,12 +77,12 @@ test_expect_equal_file_nonempty EXPECTED OUTPUT
 test_begin_subtest "checkout"
 notmuch dump > BEFORE
 notmuch tag -inbox '*'
-notmuch git -C tags.git -p '' checkout
+notmuch git -C tags.git checkout
 notmuch dump > AFTER
 test_expect_equal_file_nonempty BEFORE AFTER
 
 test_begin_subtest "archive"
-notmuch git -C tags.git -p '' archive | tar tf - | \
+notmuch git -C tags.git archive | tar tf - | \
     grep 20091117190054.GU3165@dottiness.seas.harvard.edu | sort > OUTPUT
 cat <<EOF > EXPECTED
 tags/20091117190054.GU3165@dottiness.seas.harvard.edu/
@@ -90,32 +90,32 @@ tags/20091117190054.GU3165@dottiness.seas.harvard.edu/inbox
 tags/20091117190054.GU3165@dottiness.seas.harvard.edu/signed
 tags/20091117190054.GU3165@dottiness.seas.harvard.edu/unread
 EOF
-notmuch git -C tags.git -p '' checkout
+notmuch git -C tags.git checkout
 test_expect_equal_file EXPECTED OUTPUT
 
 test_begin_subtest "status"
 notmuch tag +test id:20091117190054.GU3165@dottiness.seas.harvard.edu
-notmuch git -C tags.git -p '' status > OUTPUT
+notmuch git -C tags.git status > OUTPUT
 cat <<EOF > EXPECTED
 A	20091117190054.GU3165@dottiness.seas.harvard.edu	test
 EOF
-notmuch git -C tags.git -p '' checkout
+notmuch git -C tags.git checkout
 test_expect_equal_file EXPECTED OUTPUT
 
 test_begin_subtest "fetch"
 notmuch tag +test2 id:20091117190054.GU3165@dottiness.seas.harvard.edu
-notmuch git -C remote.git -p '' commit
+notmuch git -C remote.git commit
 notmuch tag -test2 id:20091117190054.GU3165@dottiness.seas.harvard.edu
-notmuch git -C tags.git -p '' fetch
-notmuch git -C tags.git -p '' status > OUTPUT
+notmuch git -C tags.git fetch
+notmuch git -C tags.git status > OUTPUT
 cat <<EOF > EXPECTED
  a	20091117190054.GU3165@dottiness.seas.harvard.edu	test2
 EOF
-notmuch git -C tags.git -p '' checkout
+notmuch git -C tags.git checkout
 test_expect_equal_file EXPECTED OUTPUT
 
 test_begin_subtest "merge"
-notmuch git -C tags.git -p '' merge
+notmuch git -C tags.git merge
 notmuch dump id:20091117190054.GU3165@dottiness.seas.harvard.edu | grep -v '^#' > OUTPUT
 cat <<EOF > EXPECTED
 +inbox +signed +test2 +unread -- id:20091117190054.GU3165@dottiness.seas.harvard.edu
@@ -124,10 +124,10 @@ test_expect_equal_file EXPECTED OUTPUT
 
 test_begin_subtest "push"
 notmuch tag +test3 id:20091117190054.GU3165@dottiness.seas.harvard.edu
-notmuch git -C tags.git -p '' commit
+notmuch git -C tags.git commit
 notmuch tag -test3 id:20091117190054.GU3165@dottiness.seas.harvard.edu
-notmuch git -C tags.git -p '' push
-notmuch git -C remote.git -p '' checkout
+notmuch git -C tags.git push
+notmuch git -C remote.git checkout
 notmuch dump id:20091117190054.GU3165@dottiness.seas.harvard.edu | grep -v '^#' > OUTPUT
 cat <<EOF > EXPECTED
 +inbox +signed +test2 +test3 +unread -- id:20091117190054.GU3165@dottiness.seas.harvard.edu
@@ -145,4 +145,69 @@ env NOTMUCH_CONFIG = CWD/notmuch-config
 EOF
 test_expect_equal_file EXPECTED OUTPUT
 
+test_begin_subtest "--nmbug argument sets defaults"
+notmuch git -ldebug --nmbug status |& grep '^\(prefix\|repository\)' | notmuch_dir_sanitize > OUTPUT
+cat <<EOF > EXPECTED
+prefix = notmuch::
+repository = CWD/home/.nmbug
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "invoke as nmbug sets defaults"
+"$NOTMUCH_BUILDDIR"/nmbug -ldebug status |& grep '^\(prefix\|repository\)' | notmuch_dir_sanitize > OUTPUT
+cat <<EOF > EXPECTED
+prefix = notmuch::
+repository = CWD/home/.nmbug
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "env variable NOTMUCH_GIT_DIR works when invoked as nmbug"
+NOTMUCH_GIT_DIR=`pwd`/foo "$NOTMUCH_BUILDDIR"/nmbug -ldebug status |& grep '^repository' | notmuch_dir_sanitize > OUTPUT
+cat <<EOF > EXPECTED
+repository = CWD/foo
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "env variable NOTMUCH_GIT_DIR works when invoked as 'notmuch git'"
+NOTMUCH_GIT_DIR=`pwd`/remote.git notmuch git -ldebug status |& grep '^repository' | notmuch_dir_sanitize > OUTPUT
+cat <<EOF > EXPECTED
+repository = CWD/remote.git
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "env variable NOTMUCH_GIT_PREFIX works when invoked as nmbug"
+NOTMUCH_GIT_PREFIX=foo:: "$NOTMUCH_BUILDDIR"/nmbug -ldebug status |& grep '^prefix' | notmuch_dir_sanitize > OUTPUT
+cat <<EOF > EXPECTED
+prefix = foo::
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "env variable NOTMUCH_GIT_PREFIX works when invoked as 'notmuch git'"
+NOTMUCH_GIT_PREFIX=env:: notmuch git -ldebug status |& grep '^prefix' | notmuch_dir_sanitize > OUTPUT
+cat <<EOF > EXPECTED
+prefix = env::
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+
+test_begin_subtest "init, xdg default location"
+repo=home/.local/share/notmuch/default/git
+notmuch git -ldebug init |& grep '^repository' | notmuch_dir_sanitize > OUTPUT
+git -C $repo rev-parse --absolute-git-dir | notmuch_dir_sanitize >> OUTPUT
+cat <<EOF > EXPECTED
+repository = CWD/$repo
+CWD/$repo
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "init, xdg default location, with profile"
+repo=home/.local/share/notmuch/work/git
+NOTMUCH_PROFILE=work notmuch git -ldebug init |& grep '^repository' | notmuch_dir_sanitize > OUTPUT
+git -C $repo rev-parse --absolute-git-dir | notmuch_dir_sanitize >> OUTPUT
+cat <<EOF > EXPECTED
+repository = CWD/$repo
+CWD/$repo
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
 test_done