view tests/test-subrepo-git.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.

  $ "$TESTDIR/hghave" git || exit 80

make git commits repeatable

  $ echo "[core]" >> $HOME/.gitconfig
  $ echo "autocrlf = false" >> $HOME/.gitconfig
  $ GIT_AUTHOR_NAME='test'; export GIT_AUTHOR_NAME
  $ GIT_AUTHOR_EMAIL='[e-mail]'; export GIT_AUTHOR_EMAIL
  $ GIT_AUTHOR_DATE='1234567891 +0000'; export GIT_AUTHOR_DATE
  $ GIT_COMMITTER_NAME="$GIT_AUTHOR_NAME"; export GIT_COMMITTER_NAME
  $ GIT_COMMITTER_EMAIL="$GIT_AUTHOR_EMAIL"; export GIT_COMMITTER_EMAIL
  $ GIT_COMMITTER_DATE="$GIT_AUTHOR_DATE"; export GIT_COMMITTER_DATE

root hg repo

  $ hg init t
  $ cd t
  $ echo a > a
  $ hg add a
  $ hg commit -m a
  $ cd ..

new external git repo

  $ mkdir gitroot
  $ cd gitroot
  $ git init -q
  $ echo g > g
  $ git add g
  $ git commit -q -m g

add subrepo clone

  $ cd ../t
  $ echo 's = [git]../gitroot' > .hgsub
  $ git clone -q ../gitroot s
  $ hg add .hgsub
  $ hg commit -m 'new git subrepo'
  $ hg debugsub
  path s
   source   ../gitroot
   revision da5f5b1d8ffcf62fb8327bcd3c89a4367a6018e7

record a new commit from upstream from a different branch

  $ cd ../gitroot
  $ git checkout -q -b testing
  $ echo gg >> g
  $ git commit -q -a -m gg

  $ cd ../t/s
  $ git pull -q >/dev/null 2>/dev/null
  $ git checkout -q -b testing origin/testing >/dev/null

  $ cd ..
  $ hg status --subrepos
  M s/g
  $ hg commit -m 'update git subrepo'
  $ hg debugsub
  path s
   source   ../gitroot
   revision 126f2a14290cd5ce061fdedc430170e8d39e1c5a

make $GITROOT pushable, by replacing it with a clone with nothing checked out

  $ cd ..
  $ git clone gitroot gitrootbare --bare -q
  $ rm -rf gitroot
  $ mv gitrootbare gitroot

clone root

  $ cd t
  $ hg clone . ../tc 2> /dev/null
  updating to branch default
  cloning subrepo s from $TESTTMP/gitroot
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd ../tc
  $ hg debugsub
  path s
   source   ../gitroot
   revision 126f2a14290cd5ce061fdedc430170e8d39e1c5a

update to previous substate

  $ hg update 1 -q
  $ cat s/g
  g
  $ hg debugsub
  path s
   source   ../gitroot
   revision da5f5b1d8ffcf62fb8327bcd3c89a4367a6018e7

clone root, make local change

  $ cd ../t
  $ hg clone . ../ta 2> /dev/null
  updating to branch default
  cloning subrepo s from $TESTTMP/gitroot
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ cd ../ta
  $ echo ggg >> s/g
  $ hg status --subrepos
  M s/g
  $ hg commit --subrepos -m ggg
  committing subrepository s
  $ hg debugsub
  path s
   source   ../gitroot
   revision 79695940086840c99328513acbe35f90fcd55e57

clone root separately, make different local change

  $ cd ../t
  $ hg clone . ../tb 2> /dev/null
  updating to branch default
  cloning subrepo s from $TESTTMP/gitroot
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ cd ../tb/s
  $ echo f > f
  $ git add f
  $ cd ..

  $ hg status --subrepos
  A s/f
  $ hg commit --subrepos -m f
  committing subrepository s
  $ hg debugsub
  path s
   source   ../gitroot
   revision aa84837ccfbdfedcdcdeeedc309d73e6eb069edc

user b push changes

  $ hg push 2>/dev/null
  pushing to $TESTTMP/t (glob)
  pushing branch testing of subrepo s
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files

user a pulls, merges, commits

  $ cd ../ta
  $ hg pull
  pulling from $TESTTMP/t (glob)
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (+1 heads)
  (run 'hg heads' to see heads, 'hg merge' to merge)
  $ hg merge 2>/dev/null
   subrepository s diverged (local revision: 796959400868, remote revision: aa84837ccfbd)
  (M)erge, keep (l)ocal or keep (r)emote? m
  pulling subrepo s from $TESTTMP/gitroot
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ cat s/f
  f
  $ cat s/g
  g
  gg
  ggg
  $ hg commit --subrepos -m 'merge'
  committing subrepository s
  $ hg status --subrepos --rev 1:5
  M .hgsubstate
  M s/g
  A s/f
  $ hg debugsub
  path s
   source   ../gitroot
   revision f47b465e1bce645dbf37232a00574aa1546ca8d3
  $ hg push 2>/dev/null
  pushing to $TESTTMP/t (glob)
  pushing branch testing of subrepo s
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 1 files

make upstream git changes

  $ cd ..
  $ git clone -q gitroot gitclone
  $ cd gitclone
  $ echo ff >> f
  $ git commit -q -a -m ff
  $ echo fff >> f
  $ git commit -q -a -m fff
  $ git push origin testing 2>/dev/null

make and push changes to hg without updating the subrepo

  $ cd ../t
  $ hg clone . ../td 2>&1 | egrep -v '^Cloning into|^done\.'
  updating to branch default
  cloning subrepo s from $TESTTMP/gitroot
  checking out detached HEAD in subrepo s
  check out a git branch if you intend to make changes
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd ../td
  $ echo aa >> a
  $ hg commit -m aa
  $ hg push
  pushing to $TESTTMP/t (glob)
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files

sync to upstream git, distribute changes

  $ cd ../ta
  $ hg pull -u -q
  $ cd s
  $ git pull -q >/dev/null 2>/dev/null
  $ cd ..
  $ hg commit -m 'git upstream sync'
  $ hg debugsub
  path s
   source   ../gitroot
   revision 32a343883b74769118bb1d3b4b1fbf9156f4dddc
  $ hg push -q

  $ cd ../tb
  $ hg pull -q
  $ hg update 2>/dev/null
  pulling subrepo s from $TESTTMP/gitroot
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg debugsub
  path s
   source   ../gitroot
   revision 32a343883b74769118bb1d3b4b1fbf9156f4dddc

create a new git branch

  $ cd s
  $ git checkout -b b2
  Switched to a new branch 'b2'
  $ echo a>a
  $ git add a
  $ git commit -qm 'add a'
  $ cd ..
  $ hg commit -m 'add branch in s'

pulling new git branch should not create tracking branch named 'origin/b2'
(issue3870)
  $ cd ../td/s
  $ git remote set-url origin $TESTTMP/tb/s
  $ git branch --no-track oldtesting
  $ cd ..
  $ hg pull -q ../tb
  $ hg up
  From $TESTTMP/tb/s
   * [new branch]      b2         -> origin/b2
  Previous HEAD position was f47b465... merge
  Switched to a new branch 'b2'
  pulling subrepo s from $TESTTMP/tb/s
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

update to a revision without the subrepo, keeping the local git repository

  $ cd ../t
  $ hg up 0
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ ls -a s
  .
  ..
  .git

  $ hg up 2
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ ls -a s
  .
  ..
  .git
  g

archive subrepos

  $ cd ../tc
  $ hg pull -q
  $ hg archive --subrepos -r 5 ../archive 2>/dev/null
  pulling subrepo s from $TESTTMP/gitroot
  $ cd ../archive
  $ cat s/f
  f
  $ cat s/g
  g
  gg
  ggg

  $ hg -R ../tc archive --subrepo -r 5 -X ../tc/**f ../archive_x 2>/dev/null
  $ find ../archive_x | sort | grep -v pax_global_header
  ../archive_x
  ../archive_x/.hg_archival.txt
  ../archive_x/.hgsub
  ../archive_x/.hgsubstate
  ../archive_x/a
  ../archive_x/s
  ../archive_x/s/g

create nested repo

  $ cd ..
  $ hg init outer
  $ cd outer
  $ echo b>b
  $ hg add b
  $ hg commit -m b

  $ hg clone ../t inner 2> /dev/null
  updating to branch default
  cloning subrepo s from $TESTTMP/gitroot
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo inner = inner > .hgsub
  $ hg add .hgsub
  $ hg commit -m 'nested sub'

nested commit

  $ echo ffff >> inner/s/f
  $ hg status --subrepos
  M inner/s/f
  $ hg commit --subrepos -m nested
  committing subrepository inner
  committing subrepository inner/s (glob)

nested archive

  $ hg archive --subrepos ../narchive
  $ ls ../narchive/inner/s | grep -v pax_global_header
  f
  g

relative source expansion

  $ cd ..
  $ mkdir d
  $ hg clone t d/t 2> /dev/null
  updating to branch default
  cloning subrepo s from $TESTTMP/gitroot
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved

Don't crash if the subrepo is missing

  $ hg clone t missing -q
  $ cd missing
  $ rm -rf s
  $ hg status -S
  $ hg sum | grep commit
  commit: 1 subrepos
  $ hg push -q
  abort: subrepo s is missing (in subrepo s)
  [255]
  $ hg commit --subrepos -qm missing
  abort: subrepo s is missing (in subrepo s)
  [255]
  $ hg update -C 2> /dev/null
  cloning subrepo s from $TESTTMP/gitroot
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg sum | grep commit
  commit: (clean)

Don't crash if the .hgsubstate entry is missing

  $ hg update 1 -q
  $ hg rm .hgsubstate
  $ hg commit .hgsubstate -m 'no substate'
  nothing changed
  [1]
  $ hg tag -l nosubstate
  $ hg manifest
  .hgsub
  .hgsubstate
  a

  $ hg status -S
  R .hgsubstate
  $ hg sum | grep commit
  commit: 1 removed, 1 subrepos (new branch head)

  $ hg commit -m 'restore substate'
  nothing changed
  [1]
  $ hg manifest
  .hgsub
  .hgsubstate
  a
  $ hg sum | grep commit
  commit: 1 removed, 1 subrepos (new branch head)

  $ hg update -qC nosubstate
  $ ls s
  g

issue3109: false positives in git diff-index

  $ hg update -q
  $ touch -t 200001010000 s/g
  $ hg status --subrepos
  $ touch -t 200001010000 s/g
  $ hg sum | grep commit
  commit: (clean)

Check hg update --clean
  $ cd $TESTTMP/ta
  $ echo  > s/g
  $ cd s
  $ echo c1 > f1
  $ echo c1 > f2
  $ git add f1
  $ cd ..
  $ hg status -S
  M s/g
  A s/f1
  $ ls s
  f
  f1
  f2
  g
  $ hg update --clean
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg status -S
  $ ls s
  f
  f1
  f2
  g

Sticky subrepositories, no changes
  $ cd $TESTTMP/ta
  $ hg id -n
  7
  $ cd s
  $ git rev-parse HEAD
  32a343883b74769118bb1d3b4b1fbf9156f4dddc
  $ cd ..
  $ hg update 1 > /dev/null 2>&1
  $ hg id -n
  1
  $ cd s
  $ git rev-parse HEAD
  da5f5b1d8ffcf62fb8327bcd3c89a4367a6018e7
  $ cd ..

Sticky subrepositorys, file changes
  $ touch s/f1
  $ cd s
  $ git add f1
  $ cd ..
  $ hg id -n
  1+
  $ cd s
  $ git rev-parse HEAD
  da5f5b1d8ffcf62fb8327bcd3c89a4367a6018e7
  $ cd ..
  $ hg update 4
   subrepository s diverged (local revision: da5f5b1d8ffc, remote revision: aa84837ccfbd)
  (M)erge, keep (l)ocal or keep (r)emote? m
   subrepository sources for s differ
  use (l)ocal source (da5f5b1) or (r)emote source (aa84837)?
   l
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg id -n
  4+
  $ cd s
  $ git rev-parse HEAD
  da5f5b1d8ffcf62fb8327bcd3c89a4367a6018e7
  $ cd ..
  $ hg update --clean tip > /dev/null 2>&1

Sticky subrepository, revision updates
  $ hg id -n
  7
  $ cd s
  $ git rev-parse HEAD
  32a343883b74769118bb1d3b4b1fbf9156f4dddc
  $ cd ..
  $ cd s
  $ git checkout aa84837ccfbdfedcdcdeeedc309d73e6eb069edc
  Previous HEAD position was 32a3438... fff
  HEAD is now at aa84837... f
  $ cd ..
  $ hg update 1
   subrepository s diverged (local revision: 32a343883b74, remote revision: da5f5b1d8ffc)
  (M)erge, keep (l)ocal or keep (r)emote? m
   subrepository sources for s differ (in checked out version)
  use (l)ocal source (32a3438) or (r)emote source (da5f5b1)?
   l
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg id -n
  1+
  $ cd s
  $ git rev-parse HEAD
  aa84837ccfbdfedcdcdeeedc309d73e6eb069edc
  $ cd ..

Sticky subrepository, file changes and revision updates
  $ touch s/f1
  $ cd s
  $ git add f1
  $ git rev-parse HEAD
  aa84837ccfbdfedcdcdeeedc309d73e6eb069edc
  $ cd ..
  $ hg id -n
  1+
  $ hg update 7
   subrepository s diverged (local revision: 32a343883b74, remote revision: 32a343883b74)
  (M)erge, keep (l)ocal or keep (r)emote? m
   subrepository sources for s differ
  use (l)ocal source (32a3438) or (r)emote source (32a3438)?
   l
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg id -n
  7+
  $ cd s
  $ git rev-parse HEAD
  aa84837ccfbdfedcdcdeeedc309d73e6eb069edc
  $ cd ..

Sticky repository, update --clean
  $ hg update --clean tip 2>/dev/null
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg id -n
  7
  $ cd s
  $ git rev-parse HEAD
  32a343883b74769118bb1d3b4b1fbf9156f4dddc
  $ cd ..

Test subrepo already at intended revision:
  $ cd s
  $ git checkout 32a343883b74769118bb1d3b4b1fbf9156f4dddc
  HEAD is now at 32a3438... fff
  $ cd ..
  $ hg update 1
  Previous HEAD position was 32a3438... fff
  HEAD is now at da5f5b1... g
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg id -n
  1
  $ cd s
  $ git rev-parse HEAD
  da5f5b1d8ffcf62fb8327bcd3c89a4367a6018e7
  $ cd ..

Test forgetting files, not implemented in git subrepo, used to
traceback
#if no-windows
  $ hg forget 'notafile*'
  notafile*: No such file or directory
  [1]
#else
  $ hg forget 'notafile'
  notafile: * (glob)
  [1]
#endif

  $ cd ..