Mercurial > hg
view tests/test-bookmarks-merge.t @ 27430:e240e914d226 stable
revlog: seek to end of file before writing (issue4943)
Revlogs were recently refactored to open file handles in "a+" and use a
persistent file handle for reading and writing. This drastically
reduced the number of file handles being opened.
Unfortunately, it appears that some versions of Solaris lose the file
offset when performing a write after the handle has been seeked.
The simplest workaround is to seek to EOF on files opened in a+ mode
before writing to them, which is what this patch does.
Ideally, this code would exist in the vfs layer. However, this would
require creating a proxy class for file objects in order to provide a
custom implementation of write(). This would add overhead. Since
revlogs are the only files we open in a+ mode, the one-off workaround
in revlog.py should be sufficient.
This patch appears to have little to no impact on performance on my
Linux machine.
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Thu, 17 Dec 2015 17:16:02 -0800 |
parents | 10f15e34d86c |
children | 8197b395710e |
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# init $ hg init $ echo a > a $ hg add a $ hg commit -m'a' $ echo b > b $ hg add b $ hg commit -m'b' $ hg up -C 0 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ echo c > c $ hg add c $ hg commit -m'c' created new head # test merging of diverged bookmarks $ hg bookmark -r 1 "c@diverge" $ hg bookmark -r 1 b $ hg bookmark c $ hg bookmarks b 1:d2ae7f538514 * c 2:d36c0562f908 c@diverge 1:d2ae7f538514 $ hg merge "c@diverge" 1 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ hg commit -m'merge' $ hg bookmarks b 1:d2ae7f538514 * c 3:b8f96cf4688b $ hg up -C 3 0 files updated, 0 files merged, 0 files removed, 0 files unresolved (leaving bookmark c) $ echo d > d $ hg add d $ hg commit -m'd' $ hg up -C 3 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ echo e > e $ hg add e $ hg commit -m'e' created new head $ hg up -C 5 0 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg bookmark e $ hg bookmarks b 1:d2ae7f538514 c 3:b8f96cf4688b * e 5:26bee9c5bcf3 # the picked side is bookmarked $ hg up -C 4 1 files updated, 0 files merged, 1 files removed, 0 files unresolved (leaving bookmark e) $ hg merge abort: heads are bookmarked - please merge with an explicit rev (run 'hg heads' to see all heads) [255] # our revision is bookmarked $ hg up -C e 1 files updated, 0 files merged, 1 files removed, 0 files unresolved (activating bookmark e) $ hg merge abort: no matching bookmark to merge - please merge with an explicit rev or bookmark (run 'hg heads' to see all heads) [255] # merge bookmark heads $ hg up -C 4 1 files updated, 0 files merged, 1 files removed, 0 files unresolved (leaving bookmark e) $ echo f > f $ hg commit -Am "f" adding f $ hg bookmarks -r 4 "e@diverged" $ hg up -q -C "e@diverged" $ hg merge 1 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ hg parents changeset: 4:a0546fcfe0fb bookmark: e@diverged user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: d changeset: 5:26bee9c5bcf3 bookmark: e parent: 3:b8f96cf4688b user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: e $ hg up -C e 1 files updated, 0 files merged, 1 files removed, 0 files unresolved (activating bookmark e) $ hg bookmarks b 1:d2ae7f538514 c 3:b8f96cf4688b * e 5:26bee9c5bcf3 e@diverged 4:a0546fcfe0fb $ hg merge 1 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ hg commit -m'merge' $ hg bookmarks b 1:d2ae7f538514 c 3:b8f96cf4688b * e 7:ca784329f0ba # test warning when all heads are inactive bookmarks $ hg up -C 6 1 files updated, 0 files merged, 1 files removed, 0 files unresolved (leaving bookmark e) $ echo g > g $ hg commit -Am 'g' adding g $ hg bookmark -i g $ hg bookmarks b 1:d2ae7f538514 c 3:b8f96cf4688b e 7:ca784329f0ba g 8:04dd21731d95 $ hg heads changeset: 8:04dd21731d95 bookmark: g tag: tip parent: 6:be381d1126a0 user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: g changeset: 7:ca784329f0ba bookmark: e parent: 5:26bee9c5bcf3 parent: 4:a0546fcfe0fb user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: merge $ hg merge abort: heads are bookmarked - please merge with an explicit rev (run 'hg heads' to see all heads) [255]