1 files changed, 29 insertions, 0 deletions
diff --git a/yarns/lib.py b/yarns/lib.py
new file mode 100644
index 0000000..b7df3a7
--- /dev/null
+++ b/yarns/lib.py
@@ -0,0 +1,29 @@
+import errno
+import os
+import time
+
+import cliapp
+
+import yarnutils
+
+datadir = os.environ['DATADIR']
+srcdir = os.environ['SRCDIR']
+
+vars = yarnutils.Variables(datadir)
+
+
+MAX_CAT_TIME = 5 # seconds
+def cat(filename):
+    start = time.time()
+    while time.time() - start < MAX_CAT_TIME:
+        try:
+            with open(filename) as f:
+                data = f.read()
+                if len(data) == 0:
+                    continue
+                return data
+        except (IOError, OSError) as e:
+            if e.errno == errno.ENOENT:
+                continue
+            raise
+    raise Exception("cat took more then %s seconds" % MAX_CAT_TIME)