Mercurial > hg
view tests/test-subrepo-deep-nested-change.t @ 20742:3681de20b0a7
parsers: fail fast if Python has wrong minor version (issue4110)
This change causes an informative ImportError to be raised when importing
the parsers extension module if the minor version of the currently-running
Python interpreter doesn't match that of the Python used when compiling
the extension module.
This change also exposes a parsers.versionerrortext constant in the
C implementation of the module. Its presence can be used to determine
whether this behavior is present in a version of the module. The value
of the constant is the leading text of the ImportError raised and is set
to "Python minor version mismatch".
Here is an example of what the new error looks like:
Traceback (most recent call last):
File "test.py", line 1, in <module>
import mercurial.parsers
ImportError: Python minor version mismatch: The Mercurial extension
modules were compiled with Python 2.7.6, but Mercurial is currently using
Python with sys.hexversion=33883888: Python 2.5.6
(r256:88840, Nov 18 2012, 05:37:10)
[GCC 4.2.1 Compatible Apple Clang 4.1 ((tags/Apple/clang-421.11.66))]
at: /opt/local/Library/Frameworks/Python.framework/Versions/2.5/Resources/
Python.app/Contents/MacOS/Python
The reason for raising an error in this scenario is that Python's C API
is known not to be compatible from minor version to minor version, even
if sys.api_version is the same. See for example this Python bug report
about incompatibilities between 2.5 and 2.6+:
http://bugs.python.org/issue8118
These incompatibilities can cause Mercurial to break in mysterious,
unforeseen ways. For example, when Mercurial compiled with Python 2.7 was
run with 2.5, the following crash occurred when running "hg status":
http://bz.selenic.com/show_bug.cgi?id=4110
After this crash was fixed, running with Python 2.5 no longer crashes, but
the following puzzling behavior still occurs:
$ hg status
...
File ".../mercurial/changelog.py", line 123, in __init__
revlog.revlog.__init__(self, opener, "00changelog.i")
File ".../mercurial/revlog.py", line 251, in __init__
d = self._io.parseindex(i, self._inline)
File ".../mercurial/revlog.py", line 158, in parseindex
index, cache = parsers.parse_index2(data, inline)
TypeError: data is not a string
which can be reproduced more simply with:
import mercurial.parsers as parsers
parsers.parse_index2("", True)
Both the crash and the TypeError occurred because the Python C API's
PyString_Check() returns the wrong value when the C header files from
Python 2.7 are run with Python 2.5. This is an example of an
incompatibility of the sort mentioned in the Python bug report above.
Failing fast with an informative error message results in a better user
experience in cases like the above. The information in the ImportError
also simplifies troubleshooting for those on Mercurial mailing lists, the
bug tracker, etc.
This patch only adds the version check to parsers.c, which is sufficient
to affect command-line commands like "hg status" and "hg summary".
An idea for a future improvement is to move the version-checking C code
to a more central location, and have it run when importing all
Mercurial extension modules and not just parsers.c.
author | Chris Jerdonek <chris.jerdonek@gmail.com> |
---|---|
date | Wed, 04 Dec 2013 20:38:27 -0800 |
parents | 2944a6d35158 |
children | 4165cfd67519 |
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Preparing the subrepository 'sub2' $ hg init sub2 $ echo sub2 > sub2/sub2 $ hg add -R sub2 adding sub2/sub2 (glob) $ hg commit -R sub2 -m "sub2 import" Preparing the 'sub1' repo which depends on the subrepo 'sub2' $ hg init sub1 $ echo sub1 > sub1/sub1 $ echo "sub2 = ../sub2" > sub1/.hgsub $ hg clone sub2 sub1/sub2 updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg add -R sub1 adding sub1/.hgsub (glob) adding sub1/sub1 (glob) $ hg commit -R sub1 -m "sub1 import" Preparing the 'main' repo which depends on the subrepo 'sub1' $ hg init main $ echo main > main/main $ echo "sub1 = ../sub1" > main/.hgsub $ hg clone sub1 main/sub1 updating to branch default cloning subrepo sub2 from $TESTTMP/sub2 3 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg add -R main adding main/.hgsub (glob) adding main/main (glob) $ hg commit -R main -m "main import" Cleaning both repositories, just as a clone -U $ hg up -C -R sub2 null 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ hg up -C -R sub1 null 0 files updated, 0 files merged, 3 files removed, 0 files unresolved $ hg up -C -R main null 0 files updated, 0 files merged, 3 files removed, 0 files unresolved $ rm -rf main/sub1 $ rm -rf sub1/sub2 Clone main $ hg clone main cloned updating to branch default cloning subrepo sub1 from $TESTTMP/sub1 cloning subrepo sub1/sub2 from $TESTTMP/sub2 (glob) 3 files updated, 0 files merged, 0 files removed, 0 files unresolved Checking cloned repo ids $ printf "cloned " ; hg id -R cloned cloned 7f491f53a367 tip $ printf "cloned/sub1 " ; hg id -R cloned/sub1 cloned/sub1 fc3b4ce2696f tip $ printf "cloned/sub1/sub2 " ; hg id -R cloned/sub1/sub2 cloned/sub1/sub2 c57a0840e3ba tip debugsub output for main and sub1 $ hg debugsub -R cloned path sub1 source ../sub1 revision fc3b4ce2696f7741438c79207583768f2ce6b0dd $ hg debugsub -R cloned/sub1 path sub2 source ../sub2 revision c57a0840e3badd667ef3c3ef65471609acb2ba3c Modifying deeply nested 'sub2' $ echo modified > cloned/sub1/sub2/sub2 $ hg commit --subrepos -m "deep nested modif should trigger a commit" -R cloned committing subrepository sub1 committing subrepository sub1/sub2 (glob) Checking modified node ids $ printf "cloned " ; hg id -R cloned cloned ffe6649062fe tip $ printf "cloned/sub1 " ; hg id -R cloned/sub1 cloned/sub1 2ecb03bf44a9 tip $ printf "cloned/sub1/sub2 " ; hg id -R cloned/sub1/sub2 cloned/sub1/sub2 53dd3430bcaf tip debugsub output for main and sub1 $ hg debugsub -R cloned path sub1 source ../sub1 revision 2ecb03bf44a94e749e8669481dd9069526ce7cb9 $ hg debugsub -R cloned/sub1 path sub2 source ../sub2 revision 53dd3430bcaf5ab4a7c48262bcad6d441f510487 Check that deep archiving works $ cd cloned $ echo 'test' > sub1/sub2/test.txt $ hg --config extensions.largefiles=! add sub1/sub2/test.txt $ mkdir sub1/sub2/folder $ echo 'subfolder' > sub1/sub2/folder/test.txt $ hg --config extensions.largefiles=! add sub1/sub2/folder/test.txt $ hg ci -Sm "add test.txt" committing subrepository sub1 committing subrepository sub1/sub2 (glob) $ hg --config extensions.largefiles=! archive -S ../archive_all $ find ../archive_all | sort ../archive_all ../archive_all/.hg_archival.txt ../archive_all/.hgsub ../archive_all/.hgsubstate ../archive_all/main ../archive_all/sub1 ../archive_all/sub1/.hgsub ../archive_all/sub1/.hgsubstate ../archive_all/sub1/sub1 ../archive_all/sub1/sub2 ../archive_all/sub1/sub2/folder ../archive_all/sub1/sub2/folder/test.txt ../archive_all/sub1/sub2/sub2 ../archive_all/sub1/sub2/test.txt Check that archive -X works in deep subrepos $ hg --config extensions.largefiles=! archive -S -X '**test*' ../archive_exclude $ find ../archive_exclude | sort ../archive_exclude ../archive_exclude/.hg_archival.txt ../archive_exclude/.hgsub ../archive_exclude/.hgsubstate ../archive_exclude/main ../archive_exclude/sub1 ../archive_exclude/sub1/.hgsub ../archive_exclude/sub1/.hgsubstate ../archive_exclude/sub1/sub1 ../archive_exclude/sub1/sub2 ../archive_exclude/sub1/sub2/sub2 $ hg --config extensions.largefiles=! archive -S -I '**test*' ../archive_include $ find ../archive_include | sort ../archive_include ../archive_include/sub1 ../archive_include/sub1/sub2 ../archive_include/sub1/sub2/folder ../archive_include/sub1/sub2/folder/test.txt ../archive_include/sub1/sub2/test.txt Check that deep archive works with largefiles (which overrides hgsubrepo impl) This also tests the repo.ui regression in 43fb170a23bd, and that lf subrepo subrepos are archived properly. Note that add --large through a subrepo currently adds the file as a normal file $ echo "large" > sub1/sub2/large.bin $ hg --config extensions.largefiles= add --large -R sub1/sub2 sub1/sub2/large.bin $ echo "large" > large.bin $ hg --config extensions.largefiles= add --large large.bin $ hg --config extensions.largefiles= ci -S -m "add large files" committing subrepository sub1 committing subrepository sub1/sub2 (glob) $ hg --config extensions.largefiles= archive -S ../archive_lf $ find ../archive_lf | sort ../archive_lf ../archive_lf/.hg_archival.txt ../archive_lf/.hgsub ../archive_lf/.hgsubstate ../archive_lf/large.bin ../archive_lf/main ../archive_lf/sub1 ../archive_lf/sub1/.hgsub ../archive_lf/sub1/.hgsubstate ../archive_lf/sub1/sub1 ../archive_lf/sub1/sub2 ../archive_lf/sub1/sub2/folder ../archive_lf/sub1/sub2/folder/test.txt ../archive_lf/sub1/sub2/large.bin ../archive_lf/sub1/sub2/sub2 ../archive_lf/sub1/sub2/test.txt $ rm -rf ../archive_lf Exclude large files from main and sub-sub repo $ hg --config extensions.largefiles= archive -S -X '**.bin' ../archive_lf $ find ../archive_lf | sort ../archive_lf ../archive_lf/.hg_archival.txt ../archive_lf/.hgsub ../archive_lf/.hgsubstate ../archive_lf/main ../archive_lf/sub1 ../archive_lf/sub1/.hgsub ../archive_lf/sub1/.hgsubstate ../archive_lf/sub1/sub1 ../archive_lf/sub1/sub2 ../archive_lf/sub1/sub2/folder ../archive_lf/sub1/sub2/folder/test.txt ../archive_lf/sub1/sub2/sub2 ../archive_lf/sub1/sub2/test.txt $ rm -rf ../archive_lf Exclude normal files from main and sub-sub repo $ hg --config extensions.largefiles= archive -S -X '**.txt' ../archive_lf $ find ../archive_lf | sort ../archive_lf ../archive_lf/.hgsub ../archive_lf/.hgsubstate ../archive_lf/large.bin ../archive_lf/main ../archive_lf/sub1 ../archive_lf/sub1/.hgsub ../archive_lf/sub1/.hgsubstate ../archive_lf/sub1/sub1 ../archive_lf/sub1/sub2 ../archive_lf/sub1/sub2/large.bin ../archive_lf/sub1/sub2/sub2 $ rm -rf ../archive_lf Include normal files from within a largefiles subrepo $ hg --config extensions.largefiles= archive -S -I '**.txt' ../archive_lf $ find ../archive_lf | sort ../archive_lf ../archive_lf/.hg_archival.txt ../archive_lf/sub1 ../archive_lf/sub1/sub2 ../archive_lf/sub1/sub2/folder ../archive_lf/sub1/sub2/folder/test.txt ../archive_lf/sub1/sub2/test.txt $ rm -rf ../archive_lf Include large files from within a largefiles subrepo $ hg --config extensions.largefiles= archive -S -I '**.bin' ../archive_lf $ find ../archive_lf | sort ../archive_lf ../archive_lf/large.bin ../archive_lf/sub1 ../archive_lf/sub1/sub2 ../archive_lf/sub1/sub2/large.bin $ rm -rf ../archive_lf Find an exact largefile match in a largefiles subrepo $ hg --config extensions.largefiles= archive -S -I 'sub1/sub2/large.bin' ../archive_lf $ find ../archive_lf | sort ../archive_lf ../archive_lf/sub1 ../archive_lf/sub1/sub2 ../archive_lf/sub1/sub2/large.bin $ rm -rf ../archive_lf Find an exact match to a standin (should archive nothing) $ hg --config extensions.largefiles= archive -S -I 'sub/sub2/.hglf/large.bin' ../archive_lf $ find ../archive_lf 2> /dev/null | sort $ cd ..