Add yarnutils.get_next_match

1 files changed, 41 insertions, 0 deletions

diff --git a/yarnutils/matches.py b/yarnutils/matches.py
new file mode 100644
index 0000000..6277618
--- /dev/null
+++ b/yarnutils/matches.py
@@ -0,0 +1,41 @@
+# Copyright 2017  Lars Wirzenius
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+# =*= License: GPL-3+ =*=
+
+
+import os
+
+
+_env = {}
+_next_match = 1
+
+
+def get_next_match():
+    global _env, _next_match
+    key = 'MATCH_{}'.format(_next_match)
+    if key not in _env:
+        raise Exception('No further matches')
+    _next_match += 1
+    return _env[key]
+
+
+def set_env_for_matches(env):
+    global _env, _next_match
+    _env = env.copy()
+    _next_match = 1
+
+
+set_env_for_matches(os.environ)  # pragma: no cover