parsers: make pack_dirstate take now in integer for consistency
On recent OS, 'stat.st_mtime' has a double precision floating point
value to represent nano seconds, but it is not wide enough for actual
file timestamp: nowadays, only 52 - 32 = 20 bit width is available for
decimal places in sec.
Therefore, casting it to 'int' may cause unexpected result. See also
changeset 13272104bb07 fixing issue4836 for detail.
For example, changed file A may be treated as "clean" unexpectedly in
steps below. "rounded now" is the value gotten by rounding via
'int(st.st_mtime)' or so.
---------------------+--------------------+------------------------
"now" | | timestamp of A (time_t)
float rounded time_t| action | FS dirstate
------ ------- ------+--------------------+-------- ---------------
N+.nnn N N | | --- ---
| update file A | N
| dirstate.normal(A) | N
N+.999 N+1 N | |
| dirstate.write() | N (*1)
| : |
| change file A | N
| : |
N+1.00 N+1 N+1 | |
| "hg status" (*2) | N N
------ ------- ------+--------------------+-------- ---------------
Timestamp N of A in dirstate isn't dropped at (*1), because "rounded
now" is N+1 at that time, even if 'st_mtime' in 'time_t' is still N.
Then, file A is unexpectedly treated as "clean" at (*2) in this case.
For consistent handling of 'stat.st_mtime', this patch makes
'pack_dirstate()' take 'now' argument not in floating point but in
integer.
This patch makes 'PyArg_ParseTuple()' in 'pack_dirstate()' use format
'i' (= checking type mismatch or overflow), even though it is ensured
that 'now' is in the range of 32bit signed integer by masking with
'_rangemask' (= 0x7fffffff) on caller side.
It should be cheaper enough than packing itself, and useful to
detect that legacy code invokes 'pack_dirstate()' with 'now' in
floating point value.
#require darcs
$ echo "[extensions]" >> $HGRCPATH
$ echo "convert=" >> $HGRCPATH
$ DARCS_EMAIL='test@example.org'; export DARCS_EMAIL
initialize darcs repo
$ mkdir darcs-repo
$ cd darcs-repo
$ darcs init
$ echo a > a
$ darcs record -a -l -m p0
Finished recording patch 'p0'
$ cd ..
branch and update
$ darcs get -q darcs-repo darcs-clone >/dev/null
$ cd darcs-clone
$ echo c >> a
$ echo c > c
$ darcs record -a -l -m p1.1
Finished recording patch 'p1.1'
$ cd ..
skip if we can't import elementtree
$ if hg convert darcs-repo darcs-dummy 2>&1 | grep ElementTree > /dev/null; then
> echo 'skipped: missing feature: elementtree module'
> exit 80
> fi
update source
$ cd darcs-repo
$ echo b >> a
$ echo b > b
$ darcs record -a -l -m p1.2
Finished recording patch 'p1.2'
$ darcs pull -q -a --no-set-default ../darcs-clone
Backing up ./a(*) (glob)
We have conflicts in the following files:
./a
$ sleep 1
$ echo e > a
$ echo f > f
$ mkdir dir
$ echo d > dir/d
$ echo d > dir/d2
$ darcs record -a -l -m p2
Finished recording patch 'p2'
test file and directory move
$ darcs mv f ff
Test remove + move
$ darcs remove dir/d2
$ rm dir/d2
$ darcs mv dir dir2
$ darcs record -a -l -m p3
Finished recording patch 'p3'
The converter does not currently handle patch conflicts very well.
When they occur, it reverts *all* changes and moves forward,
letting the conflict resolving patch fix collisions.
Unfortunately, non-conflicting changes, like the addition of the
"c" file in p1.1 patch are reverted too.
Just to say that manifest not listing "c" here is a bug.
$ cd ..
$ hg convert darcs-repo darcs-repo-hg
initializing destination darcs-repo-hg repository
scanning source...
sorting...
converting...
4 p0
3 p1.2
2 p1.1
1 p2
0 p3
$ hg log -R darcs-repo-hg -g --template '{rev} "{desc|firstline}" ({author}) files: {files}\n' "$@"
4 "p3" (test@example.org) files: dir/d dir/d2 dir2/d f ff
3 "p2" (test@example.org) files: a dir/d dir/d2 f
2 "p1.1" (test@example.org) files:
1 "p1.2" (test@example.org) files: a b
0 "p0" (test@example.org) files: a
$ hg up -q -R darcs-repo-hg
$ hg -R darcs-repo-hg manifest --debug
7225b30cdf38257d5cc7780772c051b6f33e6d6b 644 a
1e88685f5ddec574a34c70af492f95b6debc8741 644 b
37406831adc447ec2385014019599dfec953c806 644 dir2/d
b783a337463792a5c7d548ad85a7d3253c16ba8c 644 ff
#if no-outer-repo
try converting darcs1 repository
$ hg clone -q "$TESTDIR/bundles/darcs1.hg" darcs
$ hg convert -s darcs darcs/darcs1 2>&1 | grep darcs-1.0
darcs-1.0 repository format is unsupported, please upgrade
#endif