+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/$repo
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "configured tag prefix"
+notmuch config set git.tag_prefix test::
+notmuch git -ldebug status |& grep '^prefix' > OUTPUT
+notmuch config set git.tag_prefix
+cat <<EOF > EXPECTED
+prefix = test::
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "default version is 1"
+notmuch git -l debug -C default-version.git init
+output=$(git -C default-version.git cat-file blob HEAD:FORMAT)
+test_expect_equal "${output}" 1
+
+test_begin_subtest "illegal version"
+test_expect_code 1 "notmuch git -l debug -C default-version.git init --format-version=42"
+
+hash=("" "8d/c3/") # for use in synthetic repo contents.
+for ver in {0..1}; do
+ test_begin_subtest "init version=${ver}"
+ notmuch git -C version-${ver}.git -p "test${ver}::" init --format-version=${ver}
+ output=$(git -C version-${ver}.git ls-tree -r --name-only HEAD)
+ expected=("" "FORMAT")
+ test_expect_equal "${output}" "${expected[${ver}]}"
+
+ test_begin_subtest "initial commit version=${ver}"
+ notmuch tag "+test${ver}::a" "+test${ver}::b" id:20091117190054.GU3165@dottiness.seas.harvard.edu
+ notmuch git -C version-${ver}.git -p "test${ver}::" commit --force
+ git -C version-${ver}.git ls-tree -r --name-only HEAD | grep -v FORMAT > OUTPUT
+cat <<EOF > EXPECTED
+tags/${hash[${ver}]}20091117190054.GU3165@dottiness.seas.harvard.edu/a
+tags/${hash[${ver}]}20091117190054.GU3165@dottiness.seas.harvard.edu/b
+EOF
+ test_expect_equal_file_nonempty EXPECTED OUTPUT
+
+ test_begin_subtest "second commit repo=${ver}"
+ notmuch tag "+test${ver}::c" "+test${ver}::d" id:20091117190054.GU3165@dottiness.seas.harvard.edu
+ notmuch git -C version-${ver}.git -p "test${ver}::" commit --force
+ git -C version-${ver}.git ls-tree -r --name-only HEAD | grep -v FORMAT > OUTPUT
+cat <<EOF > EXPECTED
+tags/${hash[$ver]}20091117190054.GU3165@dottiness.seas.harvard.edu/a
+tags/${hash[$ver]}20091117190054.GU3165@dottiness.seas.harvard.edu/b
+tags/${hash[$ver]}20091117190054.GU3165@dottiness.seas.harvard.edu/c
+tags/${hash[$ver]}20091117190054.GU3165@dottiness.seas.harvard.edu/d
+EOF
+ test_expect_equal_file_nonempty EXPECTED OUTPUT
+
+ test_begin_subtest "checkout repo=${ver} "
+ notmuch dump > BEFORE
+ notmuch tag -test::${ver}::a '*'
+ notmuch git -C version-${ver}.git -p "test${ver}::" checkout --force
+ notmuch dump > AFTER
+ test_expect_equal_file_nonempty BEFORE AFTER
+done
+