Mercurial > hg
view tests/test-hgweb-filelog.t @ 25757:4d1382fd96ff
context: write dirstate out explicitly at the end of markcommitted
To detect change of a file without redundant comparison of file
content, dirstate recognizes a file as certainly clean, if:
(1) it is already known as "normal",
(2) dirstate entry for it has valid (= not "-1") timestamp, and
(3) mode, size and timestamp of it on the filesystem are as same as
ones expected in dirstate
This works as expected in many cases, but doesn't in the corner case
that changing a file keeps mode, size and timestamp of it on the
filesystem.
The timetable below shows steps in one of typical such situations:
---- ----------------------------------- ----------------
timestamp of "f"
----------------
dirstate file-
time action mem file system
---- ----------------------------------- ---- ----- -----
* *** ***
- 'hg transplant REV1 REV2 ...'
- transplanting REV1
....
N
- change "f", but keep size N
(via 'patch.patch()')
- 'dirstate.normal("f")' N ***
(via 'repo.commit()')
- transplanting REV2
- change "f", but keep size N
(via 'patch.patch()')
- aborted while patching
N+1
- release wlock
- 'dirstate.write()' N N N
- 'hg status' shows "r1" as "clean" N N N
---- ----------------------------------- ---- ----- -----
The most important point is that 'dirstate.write()' is executed at N+1
or later. This causes writing dirstate timestamp N of "f" out
successfully. If it is executed at N, 'parsers.pack_dirstate()'
replaces timestamp N with "-1" before actual writing dirstate out.
This issue can occur when 'hg transplant' satisfies conditions below:
- multiple revisions to be transplanted change the same file
- those revisions don't change mode and size of the file, and
- the 2nd or later revision of them fails after changing the file
The root cause of this issue is that files are changed without
flushing in-memory dirstate changes via 'repo.commit()' (even though
omitting 'dirstate.normallookup()' on files changed by 'patch.patch()'
for efficiency also causes this issue).
To detect changes of files correctly, this patch writes in-memory
dirstate changes out explicitly after marking files as clean in
'committablectx.markcommitted()', which is invoked via
'repo.commit()'.
After this change, timetable is changed as below:
---- ----------------------------------- ----------------
timestamp of "f"
----------------
dirstate file-
time action mem file system
---- ----------------------------------- ---- ----- -----
* *** ***
- 'hg transplant REV1 REV2 ...'
- transplanting REV1
....
N
- change "f", but keep size N
(via 'patch.patch()')
- 'dirstate.normal("f")' N ***
(via 'repo.commit()')
----------------------------------- ---- ----- -----
- 'dirsttate.write()' -1 -1
----------------------------------- ---- ----- -----
- transplanting REV2
- change "f", but keep size N
(via 'patch.patch()')
- aborted while patching
N+1
- release wlock
- 'dirstate.write()' -1 -1 N
- 'hg status' shows "r1" as "clean" -1 -1 N
---- ----------------------------------- ---- ----- -----
To reproduce this issue in tests certainly, this patch emulates some
timing critical actions as below:
- change "f" at N
'patch.patch()' with 'fakepatchtime.py' explicitly changes mtime
of patched files to "2000-01-01 00:00" (= N).
- 'dirstate.write()' via 'repo.commit()' at N
'fakedirstatewritetime.py' forces 'pack_dirstate()' to use
"2000-01-01 00:00" as "now", only if 'pack_dirstate()' is invoked
via 'committablectx.markcommitted()'.
- 'dirstate.write()' via releasing wlock at N+1 (or "not at N")
'pack_dirstate()' via releasing wlock uses actual timestamp at
runtime as "now", and it should be different from the "2000-01-01
00:00" of "f".
BTW, this patch doesn't test cases below, even though 'patch.patch()'
is used similarly in these cases:
1. failure of 'hg import' or 'hg qpush'
2. success of 'hg import', 'hg qpush' or 'hg transplant'
Case (1) above doesn't cause this kind of issue, because:
- if patching is aborted by conflicts, changed files are committed
changed files are marked as CLEAN, even though they are partially
patched.
- otherwise, dirstate are fully restored by 'dirstateguard'
For example in timetable above, timestamp of "f" in .hg/dirstate
is restored to -1 (or less than N), and subsequent 'hg status' can
detect changes correctly.
Case (2) always causes 'repo.status()' invocation via 'repo.commit()'
just after changing files inside same wlock scope.
---- ----------------------------------- ----------------
timestamp of "f"
----------------
dirstate file-
time action mem file system
---- ----------------------------------- ---- ----- -----
N *** ***
- make file "f" clean N
- execute 'hg foobar'
....
- 'dirstate.normal("f")' N ***
(e.g. via dirty check
or previous 'repo.commit()')
- change "f", but keep size N
- 'repo.status()' (*1)
(via 'repo.commit()')
---- ----------------------------------- ---- ----- -----
At a glance, 'repo.status()' at (*1) seems to cause similar issue (=
"changed files are treated as clean"), but actually doesn't.
'dirstate._lastnormaltime' should be N at (*1) above, because
'dirstate.normal()' via dirty check is finished at N.
Therefore, "f" changed at N (= 'dirstate._lastnormaltime') is forcibly
treated as "unsure" at (*1), and changes are detected as expected (see
'dirstate.status()' for detail).
If 'hg import' is executed with '--no-commit', 'repo.status()' isn't
invoked just after changing files inside same wlock scope.
But preceding 'dirstate.normal()' is invoked inside another wlock
scope via 'cmdutil.bailifchanged()', and in-memory changes should be
flushed at the end of that scope.
Therefore, timestamp N of clean "f" should be replaced by -1, if
'dirstate.write()' is invoked at N. It means that condition of this
issue isn't satisfied.
author | FUJIWARA Katsunori <foozy@lares.dti.ne.jp> |
---|---|
date | Wed, 08 Jul 2015 17:01:09 +0900 |
parents | 3bb6f5f478a7 |
children | 4b0fc75f9403 |
line wrap: on
line source
#require serve $ hg init test $ cd test $ echo b > b $ hg ci -Am "b" adding b $ echo a > a $ hg ci -Am "first a" adding a $ hg tag -r 1 a-tag $ hg bookmark -r 1 a-bookmark $ hg rm a $ hg ci -m "del a" $ hg branch a-branch marked working directory as branch a-branch (branches are permanent and global, did you want a bookmark?) $ echo b > a $ hg ci -Am "second a" adding a $ hg rm a $ hg ci -m "del2 a" $ hg mv b c $ hg ci -m "mv b" $ echo c >> c $ hg ci -m "change c" $ hg log -p changeset: 7:46c1a66bd8fc branch: a-branch tag: tip user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: change c diff -r c9637d3cc8ef -r 46c1a66bd8fc c --- a/c Thu Jan 01 00:00:00 1970 +0000 +++ b/c Thu Jan 01 00:00:00 1970 +0000 @@ -1,1 +1,2 @@ b +c changeset: 6:c9637d3cc8ef branch: a-branch user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: mv b diff -r 958bd88be4eb -r c9637d3cc8ef b --- a/b Thu Jan 01 00:00:00 1970 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1 +0,0 @@ -b diff -r 958bd88be4eb -r c9637d3cc8ef c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/c Thu Jan 01 00:00:00 1970 +0000 @@ -0,0 +1,1 @@ +b changeset: 5:958bd88be4eb branch: a-branch user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: del2 a diff -r 3f41bc784e7e -r 958bd88be4eb a --- a/a Thu Jan 01 00:00:00 1970 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1 +0,0 @@ -b changeset: 4:3f41bc784e7e branch: a-branch user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: second a diff -r 292258f86fdf -r 3f41bc784e7e a --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/a Thu Jan 01 00:00:00 1970 +0000 @@ -0,0 +1,1 @@ +b changeset: 3:292258f86fdf user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: del a diff -r 94c9dd5ca9b4 -r 292258f86fdf a --- a/a Thu Jan 01 00:00:00 1970 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1 +0,0 @@ -a changeset: 2:94c9dd5ca9b4 user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: Added tag a-tag for changeset 5ed941583260 diff -r 5ed941583260 -r 94c9dd5ca9b4 .hgtags --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/.hgtags Thu Jan 01 00:00:00 1970 +0000 @@ -0,0 +1,1 @@ +5ed941583260248620985524192fdc382ef57c36 a-tag changeset: 1:5ed941583260 bookmark: a-bookmark tag: a-tag user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: first a diff -r 6563da9dcf87 -r 5ed941583260 a --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/a Thu Jan 01 00:00:00 1970 +0000 @@ -0,0 +1,1 @@ +a changeset: 0:6563da9dcf87 user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: b diff -r 000000000000 -r 6563da9dcf87 b --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/b Thu Jan 01 00:00:00 1970 +0000 @@ -0,0 +1,1 @@ +b $ hg serve -n test -p $HGPORT -d --pid-file=hg.pid -E errors.log $ cat hg.pid >> $DAEMON_PIDS tip - two revisions $ (get-with-headers.py localhost:$HGPORT 'log/tip/a') 200 Script output follows <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html 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href="/">Mercurial</a> </h2> <h3>log a</h3> <form class="search" action="/log"> <p><input name="rev" id="search1" type="text" size="30" /></p> <div id="hint">Find changesets by keywords (author, files, the commit message), revision number or hash, or <a href="/help/revsets">revset expression</a>.</div> </form> <div class="navigate"> <a href="/log/1/a?revcount=30">less</a> <a href="/log/1/a?revcount=120">more</a> | <a href="/log/5ed941583260/a">(0)</a> <a href="/log/tip/a">tip</a> </div> <table class="bigtable"> <thead> <tr> <th class="age">age</th> <th class="author">author</th> <th class="description">description</th> </tr> </thead> <tbody class="stripes2"> <tr> <td class="age">Thu, 01 Jan 1970 00:00:00 +0000</td> <td class="author">test</td> <td class="description"> <a href="/rev/5ed941583260">first a</a> <span class="tag">a-tag</span> <span class="tag">a-bookmark</span> </td> </tr> </tbody> </table> <div class="navigate"> <a href="/log/1/a?revcount=30">less</a> <a href="/log/1/a?revcount=120">more</a> | <a href="/log/5ed941583260/a">(0)</a> <a href="/log/tip/a">tip</a> </div> </div> </div> <script type="text/javascript">process_dates()</script> </body> </html> before addition - error $ (get-with-headers.py localhost:$HGPORT 'log/0/a') 404 Not Found <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US"> <head> <link rel="icon" href="/static/hgicon.png" type="image/png" /> <meta name="robots" content="index, nofollow" /> <link rel="stylesheet" href="/static/style-paper.css" type="text/css" /> <script type="text/javascript" src="/static/mercurial.js"></script> <title>test: error</title> </head> <body> <div class="container"> <div class="menu"> <div class="logo"> <a href="http://mercurial.selenic.com/"> <img src="/static/hglogo.png" width=75 height=90 border=0 alt="mercurial" /></a> </div> <ul> <li><a href="/shortlog">log</a></li> <li><a href="/graph">graph</a></li> <li><a href="/tags">tags</a></li> <li><a href="/bookmarks">bookmarks</a></li> <li><a href="/branches">branches</a></li> </ul> <ul> <li><a href="/help">help</a></li> </ul> </div> <div class="main"> <h2 class="breadcrumb"><a href="/">Mercurial</a> </h2> <h3>error</h3> <form class="search" action="/log"> <p><input name="rev" id="search1" type="text" size="30"></p> <div id="hint">Find changesets by keywords (author, files, the commit message), revision number or hash, or <a href="/help/revsets">revset expression</a>.</div> </form> <div class="description"> <p> An error occurred while processing your request: </p> <p> a@6563da9dcf87: not found in manifest </p> </div> </div> </div> <script type="text/javascript">process_dates()</script> </body> </html> [1] should show base link, use spartan because it shows it $ (get-with-headers.py localhost:$HGPORT 'log/tip/c?style=spartan') 200 Script output follows <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <link rel="icon" href="/static/hgicon.png" type="image/png"> <meta name="robots" content="index, nofollow" /> <link rel="stylesheet" href="/static/style.css" type="text/css" /> <script type="text/javascript" src="/static/mercurial.js"></script> <title>test: c history</title> <link rel="alternate" type="application/atom+xml" href="/atom-log/tip/c" title="Atom feed for test:c"> <link rel="alternate" type="application/rss+xml" href="/rss-log/tip/c" title="RSS feed for test:c"> </head> <body> <div class="buttons"> <a href="/log?style=spartan">changelog</a> <a href="/shortlog?style=spartan">shortlog</a> <a href="/graph?style=spartan">graph</a> <a href="/tags?style=spartan">tags</a> <a href="/branches?style=spartan">branches</a> <a href="/file/tip/c?style=spartan">file</a> <a href="/annotate/tip/c?style=spartan">annotate</a> <a href="/help?style=spartan">help</a> <a type="application/rss+xml" href="/rss-log/tip/c">rss</a> <a type="application/atom+xml" href="/atom-log/tip/c" title="Atom feed for test:c">atom</a> </div> <h2><a href="/">Mercurial</a> / c revision history</h2> <p>navigate: <small class="navigate"><a href="/log/c9637d3cc8ef/c?style=spartan">(0)</a> <a href="/log/tip/c?style=spartan">tip</a> </small></p> <table class="logEntry parity0"> <tr> <th class="label"><span class="age">Thu, 01 Jan 1970 00:00:00 +0000</span>:</th> <th class="firstline"><a href="/rev/46c1a66bd8fc?style=spartan">change c</a></th> </tr> <tr> <th class="revision">revision 1:</th> <td class="node"> <a href="/file/46c1a66bd8fc/c?style=spartan">46c1a66bd8fc</a> <a href="/diff/46c1a66bd8fc/c?style=spartan">(diff)</a> <a href="/annotate/46c1a66bd8fc/c?style=spartan">(annotate)</a> </td> </tr> <tr> <th class="author">author:</th> <td class="author">test</td> </tr> <tr> <th class="date">date:</th> <td class="date">Thu, 01 Jan 1970 00:00:00 +0000</td> </tr> </table> <table class="logEntry parity1"> <tr> <th class="label"><span class="age">Thu, 01 Jan 1970 00:00:00 +0000</span>:</th> <th class="firstline"><a href="/rev/c9637d3cc8ef?style=spartan">mv b</a></th> </tr> <tr> <th class="revision">revision 0:</th> <td class="node"> <a href="/file/c9637d3cc8ef/c?style=spartan">c9637d3cc8ef</a> <a href="/diff/c9637d3cc8ef/c?style=spartan">(diff)</a> <a href="/annotate/c9637d3cc8ef/c?style=spartan">(annotate)</a> </td> </tr> <tr> <th>base:</th> <td> <a href="/file/1e88685f5dde/b?style=spartan"> b@1e88685f5dde </a> </td> </tr> <tr> <th class="author">author:</th> <td class="author">test</td> </tr> <tr> <th class="date">date:</th> <td class="date">Thu, 01 Jan 1970 00:00:00 +0000</td> </tr> </table> <script type="text/javascript">process_dates()</script> <div class="logo"> <a href="http://mercurial.selenic.com/"> <img src="/static/hglogo.png" width=75 height=90 border=0 alt="mercurial"></a> </div> </body> </html> rss log $ (get-with-headers.py localhost:$HGPORT 'rss-log/tip/a') 200 Script output follows <?xml version="1.0" encoding="ascii"?> <rss version="2.0"> <channel> <link>http://*:$HGPORT/</link> (glob) <language>en-us</language> <title>test: a history</title> <description>a revision history</description> <item> <title>second a</title> <link>http://*:$HGPORT/log3f41bc784e7e/a</link> (glob) <description><![CDATA[second a]]></description> <author>test</author> <pubDate>Thu, 01 Jan 1970 00:00:00 +0000</pubDate> </item> <item> <title>first a</title> <link>http://*:$HGPORT/log5ed941583260/a</link> (glob) <description><![CDATA[first a]]></description> <author>test</author> <pubDate>Thu, 01 Jan 1970 00:00:00 +0000</pubDate> </item> </channel> </rss> atom log $ (get-with-headers.py localhost:$HGPORT 'atom-log/tip/a') 200 Script output follows <?xml version="1.0" encoding="ascii"?> <feed xmlns="http://www.w3.org/2005/Atom"> <id>http://*:$HGPORT/atom-log/tip/a</id> (glob) <link rel="self" href="http://*:$HGPORT/atom-log/tip/a"/> (glob) <title>test: a history</title> <updated>1970-01-01T00:00:00+00:00</updated> <entry> <title>[a-branch] second a</title> <id>http://*:$HGPORT/#changeset-3f41bc784e7e73035c6d47112c6cc7efb673adf8</id> (glob) <link href="http://*:$HGPORT/rev/3f41bc784e7e"/> (glob) <author> <name>test</name> <email>test</email> </author> <updated>1970-01-01T00:00:00+00:00</updated> <published>1970-01-01T00:00:00+00:00</published> <content type="xhtml"> <table xmlns="http://www.w3.org/1999/xhtml"> <tr> <th style="text-align:left;">changeset</th> <td>3f41bc784e7e</td> </tr> <tr> <th style="text-align:left;">branch</th> <td>a-branch</td> </tr> <tr> <th style="text-align:left;">bookmark</th> <td></td> </tr> <tr> <th style="text-align:left;">tag</th> <td></td> </tr> <tr> <th style="text-align:left;">user</th> <td>test</td> </tr> <tr> <th style="text-align:left;vertical-align:top;">description</th> <td>second a</td> </tr> <tr> <th style="text-align:left;vertical-align:top;">files</th> <td></td> </tr> </table> </content> </entry> <entry> <title>first a</title> <id>http://*:$HGPORT/#changeset-5ed941583260248620985524192fdc382ef57c36</id> (glob) <link href="http://*:$HGPORT/rev/5ed941583260"/> (glob) <author> <name>test</name> <email>test</email> </author> <updated>1970-01-01T00:00:00+00:00</updated> <published>1970-01-01T00:00:00+00:00</published> <content type="xhtml"> <table xmlns="http://www.w3.org/1999/xhtml"> <tr> <th style="text-align:left;">changeset</th> <td>5ed941583260</td> </tr> <tr> <th style="text-align:left;">branch</th> <td></td> </tr> <tr> <th style="text-align:left;">bookmark</th> <td>a-bookmark</td> </tr> <tr> <th style="text-align:left;">tag</th> <td>a-tag</td> </tr> <tr> <th style="text-align:left;">user</th> <td>test</td> </tr> <tr> <th style="text-align:left;vertical-align:top;">description</th> <td>first a</td> </tr> <tr> <th style="text-align:left;vertical-align:top;">files</th> <td></td> </tr> </table> </content> </entry> </feed> errors $ cat errors.log $ cd ..