view tests/svn-safe-append.py @ 35998:dce43aaaf209

lfs: allow a pointer to be extracted from a context that removes the file

This is needed to let 'set:lfs()' and '{lfs_files}' work normally on removed
files.

Yuya suggested returning a null pointer for removed files, instead of the
pointer from the parent.  The first attempt at this was to return None for a non
LFS file, and a (pointer, ctx) tuple to hold the pointer and context (or parent
pointer and context for a removed file).  But this complicated the callers, even
the ones that didn't care about removed files.

Instead, let's use {} to represent a removed pointer.  This has the added
convenience of being a useful representation in the template language, and only
affects the callers that care about removed files (and only slightly).  Since
pointers are explicitly serialized with a call to a member function, there is no
danger of writing these to disk.

#!/usr/bin/env python

from __future__ import absolute_import

__doc__ = """Same as `echo a >> b`, but ensures a changed mtime of b.
Without this svn will not detect workspace changes."""

import os
import sys

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