hook: have a generic hook for transaction opening
We are adding generic hooking for all transactions. We do not really have any
useful information to include when opening the transaction but this is a
useful time to allow a hook anyway. We better let people abort transaction before
they happen than after multiple seconds/minutes of processing.
#!/usr/bin/env python
__doc__ = """Same as `echo a >> b`, but ensures a changed mtime of b.
Without this svn will not detect workspace changes."""
import sys, os
text = sys.argv[1]
fname = sys.argv[2]
f = open(fname, "ab")
try:
before = os.fstat(f.fileno()).st_mtime
f.write(text)
f.write("\n")
finally:
f.close()
inc = 1
now = os.stat(fname).st_mtime
while now == before:
t = now + inc
inc += 1
os.utime(fname, (t, t))
now = os.stat(fname).st_mtime