+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 "$NOTMUCH_BUILDDIR"/nmbug -ldebug status |& grep '^repository' | notmuch_dir_sanitize > OUTPUT
+cat <<EOF > EXPECTED
+repository = CWD/foo
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "env variable NOTMUCH_GIT_DIR works when invoked as 'notmuch git'"
+NOTMUCH_GIT_DIR=`pwd`/remote.git notmuch git -ldebug status |& grep '^repository' | notmuch_dir_sanitize > OUTPUT
+cat <<EOF > EXPECTED
+repository = CWD/remote.git
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+
+test_begin_subtest "env variable NOTMUCH_GIT_DIR overrides config when invoked as 'nmbug'"
+notmuch config set git.path `pwd`/bar
+NOTMUCH_GIT_DIR=`pwd`/remote.git "$NOTMUCH_BUILDDIR"/nmbug -ldebug status |& grep '^repository' | notmuch_dir_sanitize > OUTPUT
+notmuch config set git.path
+cat <<EOF > EXPECTED
+repository = CWD/remote.git
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "env variable NOTMUCH_GIT_DIR overrides config when invoked as 'notmuch git'"
+notmuch config set git.path `pwd`/bar
+NOTMUCH_GIT_DIR=`pwd`/remote.git notmuch git -ldebug status |& grep '^repository' | notmuch_dir_sanitize > OUTPUT
+notmuch config set git.path
+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=env:: "$NOTMUCH_BUILDDIR"/nmbug -ldebug status |& grep '^prefix' | notmuch_dir_sanitize > OUTPUT
+cat <<EOF > EXPECTED
+prefix = env::
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "env variable NOTMUCH_GIT_PREFIX works when invoked as nmbug"
+NOTMUCH_GIT_PREFIX=foo:: "$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 overrides config when invoked as 'nmbug'"
+notmuch config set git.tag_prefix config::
+NOTMUCH_GIT_PREFIX=env:: "$NOTMUCH_BUILDDIR"/nmbug -ldebug status |& grep '^prefix' | notmuch_dir_sanitize > OUTPUT
+notmuch config set git.path
+cat <<EOF > EXPECTED
+prefix = env::
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "env variable NOTMUCH_GIT_PREFIX overrides config when invoked as 'notmuch git'"
+notmuch config set git.tag_prefix config::
+NOTMUCH_GIT_PREFIX=env:: notmuch git -ldebug status |& grep '^prefix' | notmuch_dir_sanitize > OUTPUT
+notmuch config set git.path
+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/$repo
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "init, configured location"
+repo=configured-tags
+notmuch config set git.path `pwd`/$repo
+notmuch git -ldebug init |& grep '^repository' | notmuch_dir_sanitize > OUTPUT
+notmuch config set git.path
+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 "configured tag prefix"
+notmuch config set git.tag_prefix test::
+notmuch git -ldebug status |& grep '^prefix' > OUTPUT
+notmuch config set git.tag_prefix
+cat <<EOF > EXPECTED
+prefix = test::
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+