Add a Python library for making IMPLEMENTS

1 files changed, 60 insertions, 0 deletions

diff --git a/yarnstep.py b/yarnstep.py
new file mode 100644
index 0000000..1935cc6
--- /dev/null
+++ b/yarnstep.py
@@ -0,0 +1,60 @@
+# yarnstep.py -- Python code for making yarn IMPLEMENTS sections nicer
+#
+# This is meant to be imported, not used with yarn --shell-library.
+#
+# Copyright 2016  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
+
+import cliapp
+
+
+_next_match = 1
+def get_next_match():
+    global _next_match
+    name = 'MATCH_{}'.format(_next_match)
+    _next_match += 1
+    return os.environ[name]
+
+
+def get_next_match_as_int():
+    return int(get_next_match())
+
+
+def get_next_match_as_datadir_path():
+    return datadir(get_next_match())
+
+
+def datadir(relative):
+    return os.path.join(os.environ['DATADIR'], relative)
+
+
+def srcdir(relative):
+    return os.path.join(os.environ['SRCDIR'], relative)
+
+
+def iter_over_files(root):
+    for dirname, _, filenames in os.walk(root):
+        for filename in filenames:
+            yield os.path.join(dirname, filename)
+
+
+def cat(filename):
+    with open(filename) as f:
+        return f.read()