re-create dirs if necessary, formatting

1 files changed, 22 insertions, 4 deletions

diff --git a/bin/taler-log-adapter b/bin/taler-log-adapter
index 4d28c1a..01faf73 100755
--- a/bin/taler-log-adapter
+++ b/bin/taler-log-adapter
@@ -15,6 +15,13 @@
 #
 # @author Florian Dold
 
+"""
+Wrapper for programs that log to stderr.
+
+Redirects logs to a file specified by a path with strfmt-style placeholders
+in them.
+"""
+
 from subprocess import Popen, PIPE
 import sys
 import os
@@ -25,22 +32,33 @@ import time
 def handler(signum, frame):
     if p:
         os.kill(p.pid, signal.SIGINT)
-p = None
+
+def touchp(path):
+    dir = os.path.dirname(path)
+    if dir:
+        os.makedirs(dir, exist_ok=True)
+
 if len(sys.argv) < 3:
     print("Usage: {} logfile prog_and_args...".format(sys.argv[0]), file=sys.stderr)
     sys.exit(-1)
+
+p = None
 signal.signal(signal.SIGINT, handler)
 p = Popen(sys.argv[2:], stderr=PIPE, shell=False)
+
 log = sys.argv[1]
-dir = os.path.dirname(log)
-if dir:
-    os.makedirs(os.path.dirname(log), exist_ok=True)
+last_name = None
+
 while p.poll() is None:
     full_name = time.strftime(log)
+    if full_name != last_name:
+        touchp(full_name)
+        last_name = full_name
     last_read = p.stderr.readline()
     if last_read == '':
         break
     with open(full_name, "ab") as f:
         f.write(last_read)
+
 status = p.wait()
 sys.exit(status)