view tests/test-walk.t @ 30446:b324b4e431e5

posix: give checkexec a fast path; keep the check files and test read only

Before, Mercurial would create a new temporary file every time, stat it, change
its exec mode, stat it again, and delete it. Most of this dance was done to
handle the rare and not-so-essential case of VFAT mounts on unix. The cost of
that was paid by the much more common and important case of using normal file
systems.

Instead, try to create and preserve .hg/cache/checkisexec and
.hg/cache/checknoexec with and without exec flag set. If the files exist and
have correct exec flags set, we can conclude that that file system supports the
exec flag. Best case, the whole exec check can thus be done with two stat
calls. Worst case, we delete the wrong files and check as usual. That will be
because temporary loss of exec bit or on file systems without support for the
exec bit. In that case we check as we did before, with the additional overhead
of one extra stat call.

It is possible that this different test algorithm in some cases on odd file
systems will give different behaviour. Again, I think it will be rare and
special cases and I think it is worth the risk.

test-clone.t happens to show the situation where checkisexec is left behind
from the old style check, while checknoexec only will be created next time a
exec check will be performed.

  $ hg init t
  $ cd t
  $ mkdir -p beans
  $ for b in kidney navy turtle borlotti black pinto; do
  >     echo $b > beans/$b
  > done
  $ mkdir -p mammals/Procyonidae
  $ for m in cacomistle coatimundi raccoon; do
  >     echo $m > mammals/Procyonidae/$m
  > done
  $ echo skunk > mammals/skunk
  $ echo fennel > fennel
  $ echo fenugreek > fenugreek
  $ echo fiddlehead > fiddlehead
  $ hg addremove
  adding beans/black
  adding beans/borlotti
  adding beans/kidney
  adding beans/navy
  adding beans/pinto
  adding beans/turtle
  adding fennel
  adding fenugreek
  adding fiddlehead
  adding mammals/Procyonidae/cacomistle
  adding mammals/Procyonidae/coatimundi
  adding mammals/Procyonidae/raccoon
  adding mammals/skunk
  $ hg commit -m "commit #0"

  $ hg debugwalk
  f  beans/black                     beans/black
  f  beans/borlotti                  beans/borlotti
  f  beans/kidney                    beans/kidney
  f  beans/navy                      beans/navy
  f  beans/pinto                     beans/pinto
  f  beans/turtle                    beans/turtle
  f  fennel                          fennel
  f  fenugreek                       fenugreek
  f  fiddlehead                      fiddlehead
  f  mammals/Procyonidae/cacomistle  mammals/Procyonidae/cacomistle
  f  mammals/Procyonidae/coatimundi  mammals/Procyonidae/coatimundi
  f  mammals/Procyonidae/raccoon     mammals/Procyonidae/raccoon
  f  mammals/skunk                   mammals/skunk
  $ hg debugwalk -I.
  f  beans/black                     beans/black
  f  beans/borlotti                  beans/borlotti
  f  beans/kidney                    beans/kidney
  f  beans/navy                      beans/navy
  f  beans/pinto                     beans/pinto
  f  beans/turtle                    beans/turtle
  f  fennel                          fennel
  f  fenugreek                       fenugreek
  f  fiddlehead                      fiddlehead
  f  mammals/Procyonidae/cacomistle  mammals/Procyonidae/cacomistle
  f  mammals/Procyonidae/coatimundi  mammals/Procyonidae/coatimundi
  f  mammals/Procyonidae/raccoon     mammals/Procyonidae/raccoon
  f  mammals/skunk                   mammals/skunk

  $ cd mammals
  $ hg debugwalk
  f  beans/black                     ../beans/black
  f  beans/borlotti                  ../beans/borlotti
  f  beans/kidney                    ../beans/kidney
  f  beans/navy                      ../beans/navy
  f  beans/pinto                     ../beans/pinto
  f  beans/turtle                    ../beans/turtle
  f  fennel                          ../fennel
  f  fenugreek                       ../fenugreek
  f  fiddlehead                      ../fiddlehead
  f  mammals/Procyonidae/cacomistle  Procyonidae/cacomistle
  f  mammals/Procyonidae/coatimundi  Procyonidae/coatimundi
  f  mammals/Procyonidae/raccoon     Procyonidae/raccoon
  f  mammals/skunk                   skunk
  $ hg debugwalk -X ../beans
  f  fennel                          ../fennel
  f  fenugreek                       ../fenugreek
  f  fiddlehead                      ../fiddlehead
  f  mammals/Procyonidae/cacomistle  Procyonidae/cacomistle
  f  mammals/Procyonidae/coatimundi  Procyonidae/coatimundi
  f  mammals/Procyonidae/raccoon     Procyonidae/raccoon
  f  mammals/skunk                   skunk
  $ hg debugwalk -I '*k'
  f  mammals/skunk  skunk
  $ hg debugwalk -I 'glob:*k'
  f  mammals/skunk  skunk
  $ hg debugwalk -I 'relglob:*k'
  f  beans/black    ../beans/black
  f  fenugreek      ../fenugreek
  f  mammals/skunk  skunk
  $ hg debugwalk -I 'relglob:*k' .
  f  mammals/skunk  skunk
  $ hg debugwalk -I 're:.*k$'
  f  beans/black    ../beans/black
  f  fenugreek      ../fenugreek
  f  mammals/skunk  skunk
  $ hg debugwalk -I 'relre:.*k$'
  f  beans/black    ../beans/black
  f  fenugreek      ../fenugreek
  f  mammals/skunk  skunk
  $ hg debugwalk -I 'path:beans'
  f  beans/black     ../beans/black
  f  beans/borlotti  ../beans/borlotti
  f  beans/kidney    ../beans/kidney
  f  beans/navy      ../beans/navy
  f  beans/pinto     ../beans/pinto
  f  beans/turtle    ../beans/turtle
  $ hg debugwalk -I 'relpath:detour/../../beans'
  f  beans/black     ../beans/black
  f  beans/borlotti  ../beans/borlotti
  f  beans/kidney    ../beans/kidney
  f  beans/navy      ../beans/navy
  f  beans/pinto     ../beans/pinto
  f  beans/turtle    ../beans/turtle
  $ hg debugwalk .
  f  mammals/Procyonidae/cacomistle  Procyonidae/cacomistle
  f  mammals/Procyonidae/coatimundi  Procyonidae/coatimundi
  f  mammals/Procyonidae/raccoon     Procyonidae/raccoon
  f  mammals/skunk                   skunk
  $ hg debugwalk -I.
  f  mammals/Procyonidae/cacomistle  Procyonidae/cacomistle
  f  mammals/Procyonidae/coatimundi  Procyonidae/coatimundi
  f  mammals/Procyonidae/raccoon     Procyonidae/raccoon
  f  mammals/skunk                   skunk
  $ hg debugwalk Procyonidae
  f  mammals/Procyonidae/cacomistle  Procyonidae/cacomistle
  f  mammals/Procyonidae/coatimundi  Procyonidae/coatimundi
  f  mammals/Procyonidae/raccoon     Procyonidae/raccoon

  $ cd Procyonidae
  $ hg debugwalk .
  f  mammals/Procyonidae/cacomistle  cacomistle
  f  mammals/Procyonidae/coatimundi  coatimundi
  f  mammals/Procyonidae/raccoon     raccoon
  $ hg debugwalk ..
  f  mammals/Procyonidae/cacomistle  cacomistle
  f  mammals/Procyonidae/coatimundi  coatimundi
  f  mammals/Procyonidae/raccoon     raccoon
  f  mammals/skunk                   ../skunk
  $ cd ..

  $ hg debugwalk ../beans
  f  beans/black     ../beans/black
  f  beans/borlotti  ../beans/borlotti
  f  beans/kidney    ../beans/kidney
  f  beans/navy      ../beans/navy
  f  beans/pinto     ../beans/pinto
  f  beans/turtle    ../beans/turtle
  $ hg debugwalk .
  f  mammals/Procyonidae/cacomistle  Procyonidae/cacomistle
  f  mammals/Procyonidae/coatimundi  Procyonidae/coatimundi
  f  mammals/Procyonidae/raccoon     Procyonidae/raccoon
  f  mammals/skunk                   skunk
  $ hg debugwalk .hg
  abort: path 'mammals/.hg' is inside nested repo 'mammals' (glob)
  [255]
  $ hg debugwalk ../.hg
  abort: path contains illegal component: .hg
  [255]
  $ cd ..

  $ hg debugwalk -Ibeans
  f  beans/black     beans/black
  f  beans/borlotti  beans/borlotti
  f  beans/kidney    beans/kidney
  f  beans/navy      beans/navy
  f  beans/pinto     beans/pinto
  f  beans/turtle    beans/turtle
  $ hg debugwalk -I '{*,{b,m}*/*}k'
  f  beans/black    beans/black
  f  fenugreek      fenugreek
  f  mammals/skunk  mammals/skunk
  $ hg debugwalk -Ibeans mammals
  $ hg debugwalk -Inon-existent
  $ hg debugwalk -Inon-existent -Ibeans/black
  f  beans/black  beans/black
  $ hg debugwalk -Ibeans beans/black
  f  beans/black  beans/black  exact
  $ hg debugwalk -Ibeans/black beans
  f  beans/black  beans/black
  $ hg debugwalk -Xbeans/black beans
  f  beans/borlotti  beans/borlotti
  f  beans/kidney    beans/kidney
  f  beans/navy      beans/navy
  f  beans/pinto     beans/pinto
  f  beans/turtle    beans/turtle
  $ hg debugwalk -Xbeans/black -Ibeans
  f  beans/borlotti  beans/borlotti
  f  beans/kidney    beans/kidney
  f  beans/navy      beans/navy
  f  beans/pinto     beans/pinto
  f  beans/turtle    beans/turtle
  $ hg debugwalk -Xbeans/black beans/black
  f  beans/black  beans/black  exact
  $ hg debugwalk -Xbeans/black -Ibeans/black
  $ hg debugwalk -Xbeans beans/black
  f  beans/black  beans/black  exact
  $ hg debugwalk -Xbeans -Ibeans/black
  $ hg debugwalk 'glob:mammals/../beans/b*'
  f  beans/black     beans/black
  f  beans/borlotti  beans/borlotti
  $ hg debugwalk '-X*/Procyonidae' mammals
  f  mammals/skunk  mammals/skunk
  $ hg debugwalk path:mammals
  f  mammals/Procyonidae/cacomistle  mammals/Procyonidae/cacomistle
  f  mammals/Procyonidae/coatimundi  mammals/Procyonidae/coatimundi
  f  mammals/Procyonidae/raccoon     mammals/Procyonidae/raccoon
  f  mammals/skunk                   mammals/skunk
  $ hg debugwalk ..
  abort: .. not under root '$TESTTMP/t' (glob)
  [255]
  $ hg debugwalk beans/../..
  abort: beans/../.. not under root '$TESTTMP/t' (glob)
  [255]
  $ hg debugwalk .hg
  abort: path contains illegal component: .hg
  [255]
  $ hg debugwalk beans/../.hg
  abort: path contains illegal component: .hg
  [255]
  $ hg debugwalk beans/../.hg/data
  abort: path contains illegal component: .hg/data (glob)
  [255]
  $ hg debugwalk beans/.hg
  abort: path 'beans/.hg' is inside nested repo 'beans' (glob)
  [255]

Test absolute paths:

  $ hg debugwalk `pwd`/beans
  f  beans/black     beans/black
  f  beans/borlotti  beans/borlotti
  f  beans/kidney    beans/kidney
  f  beans/navy      beans/navy
  f  beans/pinto     beans/pinto
  f  beans/turtle    beans/turtle
  $ hg debugwalk `pwd`/..
  abort: $TESTTMP/t/.. not under root '$TESTTMP/t' (glob)
  [255]

Test patterns:

  $ hg debugwalk glob:\*
  f  fennel      fennel
  f  fenugreek   fenugreek
  f  fiddlehead  fiddlehead
#if eol-in-paths
  $ echo glob:glob > glob:glob
  $ hg addremove
  adding glob:glob
  warning: filename contains ':', which is reserved on Windows: 'glob:glob'
  $ hg debugwalk glob:\*
  f  fennel      fennel
  f  fenugreek   fenugreek
  f  fiddlehead  fiddlehead
  f  glob:glob   glob:glob
  $ hg debugwalk glob:glob
  glob: No such file or directory
  $ hg debugwalk glob:glob:glob
  f  glob:glob  glob:glob  exact
  $ hg debugwalk path:glob:glob
  f  glob:glob  glob:glob  exact
  $ rm glob:glob
  $ hg addremove
  removing glob:glob
#endif

  $ hg debugwalk 'glob:**e'
  f  beans/turtle                    beans/turtle
  f  mammals/Procyonidae/cacomistle  mammals/Procyonidae/cacomistle

  $ hg debugwalk 're:.*[kb]$'
  f  beans/black    beans/black
  f  fenugreek      fenugreek
  f  mammals/skunk  mammals/skunk

  $ hg debugwalk path:beans/black
  f  beans/black  beans/black  exact
  $ hg debugwalk path:beans//black
  f  beans/black  beans/black  exact

  $ hg debugwalk relglob:Procyonidae
  $ hg debugwalk 'relglob:Procyonidae/**'
  f  mammals/Procyonidae/cacomistle  mammals/Procyonidae/cacomistle
  f  mammals/Procyonidae/coatimundi  mammals/Procyonidae/coatimundi
  f  mammals/Procyonidae/raccoon     mammals/Procyonidae/raccoon
  $ hg debugwalk 'relglob:Procyonidae/**' fennel
  f  fennel                          fennel                          exact
  f  mammals/Procyonidae/cacomistle  mammals/Procyonidae/cacomistle
  f  mammals/Procyonidae/coatimundi  mammals/Procyonidae/coatimundi
  f  mammals/Procyonidae/raccoon     mammals/Procyonidae/raccoon
  $ hg debugwalk beans 'glob:beans/*'
  f  beans/black     beans/black
  f  beans/borlotti  beans/borlotti
  f  beans/kidney    beans/kidney
  f  beans/navy      beans/navy
  f  beans/pinto     beans/pinto
  f  beans/turtle    beans/turtle
  $ hg debugwalk 'glob:mamm**'
  f  mammals/Procyonidae/cacomistle  mammals/Procyonidae/cacomistle
  f  mammals/Procyonidae/coatimundi  mammals/Procyonidae/coatimundi
  f  mammals/Procyonidae/raccoon     mammals/Procyonidae/raccoon
  f  mammals/skunk                   mammals/skunk
  $ hg debugwalk 'glob:mamm**' fennel
  f  fennel                          fennel                          exact
  f  mammals/Procyonidae/cacomistle  mammals/Procyonidae/cacomistle
  f  mammals/Procyonidae/coatimundi  mammals/Procyonidae/coatimundi
  f  mammals/Procyonidae/raccoon     mammals/Procyonidae/raccoon
  f  mammals/skunk                   mammals/skunk
  $ hg debugwalk 'glob:j*'
  $ hg debugwalk NOEXIST
  NOEXIST: * (glob)

#if fifo
  $ mkfifo fifo
  $ hg debugwalk fifo
  fifo: unsupported file type (type is fifo)
#endif

  $ rm fenugreek
  $ hg debugwalk fenugreek
  f  fenugreek  fenugreek  exact
  $ hg rm fenugreek
  $ hg debugwalk fenugreek
  f  fenugreek  fenugreek  exact
  $ touch new
  $ hg debugwalk new
  f  new  new  exact

  $ mkdir ignored
  $ touch ignored/file
  $ echo '^ignored$' > .hgignore
  $ hg debugwalk ignored
  $ hg debugwalk ignored/file
  f  ignored/file  ignored/file  exact

Test listfile and listfile0

  $ $PYTHON -c "file('listfile0', 'wb').write('fenugreek\0new\0')"
  $ hg debugwalk -I 'listfile0:listfile0'
  f  fenugreek  fenugreek
  f  new        new
  $ $PYTHON -c "file('listfile', 'wb').write('fenugreek\nnew\r\nmammals/skunk\n')"
  $ hg debugwalk -I 'listfile:listfile'
  f  fenugreek      fenugreek
  f  mammals/skunk  mammals/skunk
  f  new            new

  $ cd ..
  $ hg debugwalk -R t t/mammals/skunk
  f  mammals/skunk  t/mammals/skunk  exact
  $ mkdir t2
  $ cd t2
  $ hg debugwalk -R ../t ../t/mammals/skunk
  f  mammals/skunk  ../t/mammals/skunk  exact
  $ hg debugwalk --cwd ../t mammals/skunk
  f  mammals/skunk  mammals/skunk  exact

  $ cd ..

Test split patterns on overflow

  $ cd t
  $ echo fennel > overflow.list
  $ $PYTHON -c "for i in xrange(20000 / 100): print 'x' * 100" >> overflow.list
  $ echo fenugreek >> overflow.list
  $ hg debugwalk 'listfile:overflow.list' 2>&1 | grep -v '^xxx'
  f  fennel     fennel     exact
  f  fenugreek  fenugreek  exact
  $ cd ..