view tests/test-audit-subrepo.t @ 42486:35d674a3d5db

copies: don't filter out copy targets created on other side of merge commit

If file X is copied to Y on one side of merge and the other side
creates Y (no copy), we would not mark that as copy. In the
changeset-centric pathcopies() version, that was done by checking if
the copy target existed on the other branch. Even though merge commits
are pretty uncommon, it still turned out to be too expensive to load
the manifest of the parents of merge commits. In a repo of
mozilla-unified converted to storing copies in changesets, about 2m30s
of `hg debugpathcopies FIREFOX_BETA_59_END FIREFOX_BETA_60_BASE` is
spent on this check of merge commits.

I tried to think of a way of storing more information in the
changesets in order to cheaply detect these cases, but I couldn't
think of a solution. So this patch simply removes those checks.

For reference, these extra copies are reported from the aforementioned
command after this patch:

  browser/base/content/sanitize.js -> browser/modules/Sanitizer.jsm
  testing/mozbase/mozprocess/tests/process_normal_finish_python.ini -> testing/mozbase/mozprocess/tests/process_normal_finish.ini
  testing/mozbase/mozprocess/tests/process_waittimeout_python.ini -> testing/mozbase/mozprocess/tests/process_waittimeout.ini
  testing/mozbase/mozprocess/tests/process_waittimeout_10s_python.ini -> testing/mozbase/mozprocess/tests/process_waittimeout_10s.ini

Since these copies were created on one side of some merge, it still
seems reasonable to include them, so I'm not even sure it's worse than
filelog pathcopies(), just different.

Differential Revision: https://phab.mercurial-scm.org/D6420

Test illegal name
-----------------

on commit:

  $ hg init hgname
  $ cd hgname
  $ mkdir sub
  $ hg init sub/.hg
  $ echo 'sub/.hg = sub/.hg' >> .hgsub
  $ hg ci -qAm 'add subrepo "sub/.hg"'
  abort: path 'sub/.hg' is inside nested repo 'sub'
  [255]

prepare tampered repo (including the commit above):

  $ hg import --bypass -qm 'add subrepo "sub/.hg"' - <<'EOF'
  > diff --git a/.hgsub b/.hgsub
  > new file mode 100644
  > --- /dev/null
  > +++ b/.hgsub
  > @@ -0,0 +1,1 @@
  > +sub/.hg = sub/.hg
  > diff --git a/.hgsubstate b/.hgsubstate
  > new file mode 100644
  > --- /dev/null
  > +++ b/.hgsubstate
  > @@ -0,0 +1,1 @@
  > +0000000000000000000000000000000000000000 sub/.hg
  > EOF
  $ cd ..

on clone (and update):

  $ hg clone -q hgname hgname2
  abort: path 'sub/.hg' is inside nested repo 'sub'
  [255]

Test absolute path
------------------

on commit:

  $ hg init absolutepath
  $ cd absolutepath
  $ hg init sub
  $ echo '/sub = sub' >> .hgsub
  $ hg ci -qAm 'add subrepo "/sub"'
  abort: path contains illegal component: /sub
  [255]

prepare tampered repo (including the commit above):

  $ hg import --bypass -qm 'add subrepo "/sub"' - <<'EOF'
  > diff --git a/.hgsub b/.hgsub
  > new file mode 100644
  > --- /dev/null
  > +++ b/.hgsub
  > @@ -0,0 +1,1 @@
  > +/sub = sub
  > diff --git a/.hgsubstate b/.hgsubstate
  > new file mode 100644
  > --- /dev/null
  > +++ b/.hgsubstate
  > @@ -0,0 +1,1 @@
  > +0000000000000000000000000000000000000000 /sub
  > EOF
  $ cd ..

on clone (and update):

  $ hg clone -q absolutepath absolutepath2
  abort: path contains illegal component: /sub
  [255]

Test root path
--------------

on commit:

  $ hg init rootpath
  $ cd rootpath
  $ hg init sub
  $ echo '/ = sub' >> .hgsub
  $ hg ci -qAm 'add subrepo "/"'
  abort: path ends in directory separator: /
  [255]

prepare tampered repo (including the commit above):

  $ hg import --bypass -qm 'add subrepo "/"' - <<'EOF'
  > diff --git a/.hgsub b/.hgsub
  > new file mode 100644
  > --- /dev/null
  > +++ b/.hgsub
  > @@ -0,0 +1,1 @@
  > +/ = sub
  > diff --git a/.hgsubstate b/.hgsubstate
  > new file mode 100644
  > --- /dev/null
  > +++ b/.hgsubstate
  > @@ -0,0 +1,1 @@
  > +0000000000000000000000000000000000000000 /
  > EOF
  $ cd ..

on clone (and update):

  $ hg clone -q rootpath rootpath2
  abort: path ends in directory separator: /
  [255]

Test empty path
---------------

on commit:

  $ hg init emptypath
  $ cd emptypath
  $ hg init sub
  $ echo '= sub' >> .hgsub
  $ hg ci -qAm 'add subrepo ""'
  hg: parse error at .hgsub:1: = sub
  [255]

prepare tampered repo (including the commit above):

  $ hg import --bypass -qm 'add subrepo ""' - <<'EOF'
  > diff --git a/.hgsub b/.hgsub
  > new file mode 100644
  > --- /dev/null
  > +++ b/.hgsub
  > @@ -0,0 +1,1 @@
  > += sub
  > diff --git a/.hgsubstate b/.hgsubstate
  > new file mode 100644
  > --- /dev/null
  > +++ b/.hgsubstate
  > @@ -0,0 +1,1 @@
  > +0000000000000000000000000000000000000000
  > EOF
  $ cd ..

on clone (and update):

  $ hg clone -q emptypath emptypath2
  hg: parse error at .hgsub:1: = sub
  [255]

Test current path
-----------------

on commit:

  $ hg init currentpath
  $ cd currentpath
  $ hg init sub
  $ echo '. = sub' >> .hgsub
  $ hg ci -qAm 'add subrepo "."'
  abort: subrepo path contains illegal component: .
  [255]

prepare tampered repo (including the commit above):

  $ hg import --bypass -qm 'add subrepo "."' - <<'EOF'
  > diff --git a/.hgsub b/.hgsub
  > new file mode 100644
  > --- /dev/null
  > +++ b/.hgsub
  > @@ -0,0 +1,1 @@
  > +.= sub
  > diff --git a/.hgsubstate b/.hgsubstate
  > new file mode 100644
  > --- /dev/null
  > +++ b/.hgsubstate
  > @@ -0,0 +1,1 @@
  > +0000000000000000000000000000000000000000 .
  > EOF
  $ cd ..

on clone (and update):

  $ hg clone -q currentpath currentpath2
  abort: subrepo path contains illegal component: .
  [255]

Test outer path
---------------

on commit:

  $ mkdir outerpath
  $ cd outerpath
  $ hg init main
  $ cd main
  $ hg init ../sub
  $ echo '../sub = ../sub' >> .hgsub
  $ hg ci -qAm 'add subrepo "../sub"'
  abort: path contains illegal component: ../sub
  [255]

prepare tampered repo (including the commit above):

  $ hg import --bypass -qm 'add subrepo "../sub"' - <<'EOF'
  > diff --git a/.hgsub b/.hgsub
  > new file mode 100644
  > --- /dev/null
  > +++ b/.hgsub
  > @@ -0,0 +1,1 @@
  > +../sub = ../sub
  > diff --git a/.hgsubstate b/.hgsubstate
  > new file mode 100644
  > --- /dev/null
  > +++ b/.hgsubstate
  > @@ -0,0 +1,1 @@
  > +0000000000000000000000000000000000000000 ../sub
  > EOF
  $ cd ..

on clone (and update):

  $ hg clone -q main main2
  abort: path contains illegal component: ../sub
  [255]
  $ cd ..

Test variable expansion
-----------------------

Subrepository paths shouldn't be expanded, but we fail to handle them
properly. Any local repository paths are expanded.

on commit:

  $ mkdir envvar
  $ cd envvar
  $ hg init main
  $ cd main
  $ hg init sub1
  $ cat <<'EOF' > sub1/hgrc
  > [hooks]
  > log = echo pwned
  > EOF
  $ hg -R sub1 ci -qAm 'add sub1 files'
  $ hg -R sub1 log -r. -T '{node}\n'
  39eb4b4d3e096527668784893a9280578a8f38b8
  $ echo '$SUB = sub1' >> .hgsub
  $ SUB=sub1 hg ci -qAm 'add subrepo "$SUB"'
  abort: subrepo path contains illegal component: $SUB
  [255]

prepare tampered repo (including the changes above as two commits):

  $ hg import --bypass -qm 'add subrepo "$SUB"' - <<'EOF'
  > diff --git a/.hgsub b/.hgsub
  > new file mode 100644
  > --- /dev/null
  > +++ b/.hgsub
  > @@ -0,0 +1,1 @@
  > +$SUB = sub1
  > diff --git a/.hgsubstate b/.hgsubstate
  > new file mode 100644
  > --- /dev/null
  > +++ b/.hgsubstate
  > @@ -0,0 +1,1 @@
  > +0000000000000000000000000000000000000000 $SUB
  > EOF
  $ hg debugsetparents 0
  $ hg import --bypass -qm 'update subrepo "$SUB"' - <<'EOF'
  > diff --git a/.hgsubstate b/.hgsubstate
  > --- a/.hgsubstate
  > +++ b/.hgsubstate
  > @@ -1,1 +1,1 @@
  > -0000000000000000000000000000000000000000 $SUB
  > +39eb4b4d3e096527668784893a9280578a8f38b8 $SUB
  > EOF
  $ cd ..

on clone (and update) with various substitutions:

  $ hg clone -q main main2
  abort: subrepo path contains illegal component: $SUB
  [255]
  $ ls main2

  $ SUB=sub1 hg clone -q main main3
  abort: subrepo path contains illegal component: $SUB
  [255]
  $ ls main3

  $ SUB=sub2 hg clone -q main main4
  abort: subrepo path contains illegal component: $SUB
  [255]
  $ ls main4

on clone empty subrepo into .hg, then pull (and update), which at least fails:

  $ SUB=.hg hg clone -qr0 main main5
  abort: subrepo path contains illegal component: $SUB
  [255]
  $ ls main5
  $ test -d main5/.hg/.hg
  [1]
  $ SUB=.hg hg -R main5 pull -u
  pulling from $TESTTMP/envvar/main
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  new changesets 7a2f0e59146f
  .hgsubstate: untracked file differs
  abort: untracked files in working directory differ from files in requested revision
  [255]
  $ cat main5/.hg/hgrc | grep pwned
  [1]

on clone (and update) into .hg, which at least fails:

  $ SUB=.hg hg clone -q main main6
  abort: subrepo path contains illegal component: $SUB
  [255]
  $ ls main6
  $ cat main6/.hg/hgrc | grep pwned
  [1]

on clone (and update) into .hg/* subdir:

  $ SUB=.hg/foo hg clone -q main main7
  abort: subrepo path contains illegal component: $SUB
  [255]
  $ ls main7
  $ test -d main7/.hg/.hg
  [1]

on clone (and update) into outer tree:

  $ SUB=../out-of-tree-write hg clone -q main main8
  abort: subrepo path contains illegal component: $SUB
  [255]
  $ ls main8

on clone (and update) into e.g. $HOME, which doesn't work since subrepo paths
are concatenated prior to variable expansion:

  $ SUB="$TESTTMP/envvar/fakehome" hg clone -q main main9
  abort: subrepo path contains illegal component: $SUB
  [255]
  $ ls main9 | wc -l
  \s*0 (re)

  $ ls
  main
  main2
  main3
  main4
  main5
  main6
  main7
  main8
  main9
  $ cd ..

Test tilde
----------

The leading tilde may be expanded to $HOME, but it can be a valid subrepo
path in theory. However, we want to prohibit it as there might be unsafe
handling of such paths.

on commit:

  $ hg init tilde
  $ cd tilde
  $ hg init './~'
  $ echo '~ = ~' >> .hgsub
  $ hg ci -qAm 'add subrepo "~"'
  abort: subrepo path contains illegal component: ~
  [255]

prepare tampered repo (including the commit above):

  $ hg import --bypass -qm 'add subrepo "~"' - <<'EOF'
  > diff --git a/.hgsub b/.hgsub
  > new file mode 100644
  > --- /dev/null
  > +++ b/.hgsub
  > @@ -0,0 +1,1 @@
  > +~ = ~
  > diff --git a/.hgsubstate b/.hgsubstate
  > new file mode 100644
  > --- /dev/null
  > +++ b/.hgsubstate
  > @@ -0,0 +1,1 @@
  > +0000000000000000000000000000000000000000 ~
  > EOF
  $ cd ..

on clone (and update):

  $ hg clone -q tilde tilde2
  abort: subrepo path contains illegal component: ~
  [255]

Test direct symlink traversal
-----------------------------

#if symlink

on commit:

  $ mkdir hgsymdir
  $ hg init hgsymdir/root
  $ cd hgsymdir/root
  $ ln -s ../out
  $ hg ci -qAm 'add symlink "out"'
  $ hg init ../out
  $ echo 'out = out' >> .hgsub
  $ hg ci -qAm 'add subrepo "out"'
  abort: subrepo 'out' traverses symbolic link
  [255]

prepare tampered repo (including the commit above):

  $ hg import --bypass -qm 'add subrepo "out"' - <<'EOF'
  > diff --git a/.hgsub b/.hgsub
  > new file mode 100644
  > --- /dev/null
  > +++ b/.hgsub
  > @@ -0,0 +1,1 @@
  > +out = out
  > diff --git a/.hgsubstate b/.hgsubstate
  > new file mode 100644
  > --- /dev/null
  > +++ b/.hgsubstate
  > @@ -0,0 +1,1 @@
  > +0000000000000000000000000000000000000000 out
  > EOF
  $ cd ../..

on clone (and update):

  $ mkdir hgsymdir2
  $ hg clone -q hgsymdir/root hgsymdir2/root
  abort: subrepo 'out' traverses symbolic link
  [255]
  $ ls hgsymdir2
  root

#endif

Test indirect symlink traversal
-------------------------------

#if symlink

on commit:

  $ mkdir hgsymin
  $ hg init hgsymin/root
  $ cd hgsymin/root
  $ ln -s ../out
  $ hg ci -qAm 'add symlink "out"'
  $ mkdir ../out
  $ hg init ../out/sub
  $ echo 'out/sub = out/sub' >> .hgsub
  $ hg ci -qAm 'add subrepo "out/sub"'
  abort: path 'out/sub' traverses symbolic link 'out'
  [255]

prepare tampered repo (including the commit above):

  $ hg import --bypass -qm 'add subrepo "out/sub"' - <<'EOF'
  > diff --git a/.hgsub b/.hgsub
  > new file mode 100644
  > --- /dev/null
  > +++ b/.hgsub
  > @@ -0,0 +1,1 @@
  > +out/sub = out/sub
  > diff --git a/.hgsubstate b/.hgsubstate
  > new file mode 100644
  > --- /dev/null
  > +++ b/.hgsubstate
  > @@ -0,0 +1,1 @@
  > +0000000000000000000000000000000000000000 out/sub
  > EOF
  $ cd ../..

on clone (and update):

  $ mkdir hgsymin2
  $ hg clone -q hgsymin/root hgsymin2/root
  abort: path 'out/sub' traverses symbolic link 'out'
  [255]
  $ ls hgsymin2
  root

#endif

Test symlink traversal by variable expansion
--------------------------------------------

#if symlink

  $ FAKEHOME="$TESTTMP/envvarsym/fakehome"

on commit:

  $ mkdir envvarsym
  $ cd envvarsym
  $ hg init main
  $ cd main
  $ ln -s "`echo "$FAKEHOME" | sed 's|\(.\)/.*|\1|'`"
  $ hg ci -qAm 'add symlink to top-level system directory'

  $ hg init sub1
  $ echo pwned > sub1/pwned
  $ hg -R sub1 ci -qAm 'add sub1 files'
  $ hg -R sub1 log -r. -T '{node}\n'
  f40c9134ba1b6961e12f250868823f0092fb68a8
  $ echo '$SUB = sub1' >> .hgsub
  $ SUB="$FAKEHOME" hg ci -qAm 'add subrepo "$SUB"'
  abort: subrepo path contains illegal component: $SUB
  [255]

prepare tampered repo (including the changes above as two commits):

  $ hg import --bypass -qm 'add subrepo "$SUB"' - <<'EOF'
  > diff --git a/.hgsub b/.hgsub
  > new file mode 100644
  > --- /dev/null
  > +++ b/.hgsub
  > @@ -0,0 +1,1 @@
  > +$SUB = sub1
  > diff --git a/.hgsubstate b/.hgsubstate
  > new file mode 100644
  > --- /dev/null
  > +++ b/.hgsubstate
  > @@ -0,0 +1,1 @@
  > +0000000000000000000000000000000000000000 $SUB
  > EOF
  $ hg debugsetparents 1
  $ hg import --bypass -qm 'update subrepo "$SUB"' - <<'EOF'
  > diff --git a/.hgsubstate b/.hgsubstate
  > --- a/.hgsubstate
  > +++ b/.hgsubstate
  > @@ -1,1 +1,1 @@
  > -0000000000000000000000000000000000000000 $SUB
  > +f40c9134ba1b6961e12f250868823f0092fb68a8 $SUB
  > EOF
  $ cd ..

on clone (and update) without fakehome directory:

  $ rm -fR "$FAKEHOME"
  $ SUB="$FAKEHOME" hg clone -q main main2
  abort: subrepo path contains illegal component: $SUB
  [255]
  $ test -d "$FAKEHOME"
  [1]

on clone (and update) with empty fakehome directory:

  $ rm -fR "$FAKEHOME"
  $ mkdir "$FAKEHOME"
  $ SUB="$FAKEHOME" hg clone -q main main3
  abort: subrepo path contains illegal component: $SUB
  [255]
  $ ls "$FAKEHOME"

on clone (and update) with non-empty fakehome directory:

  $ rm -fR "$FAKEHOME"
  $ mkdir "$FAKEHOME"
  $ touch "$FAKEHOME/a"
  $ SUB="$FAKEHOME" hg clone -q main main4
  abort: subrepo path contains illegal component: $SUB
  [255]
  $ ls "$FAKEHOME"
  a

on clone empty subrepo with non-empty fakehome directory,
then pull (and update):

  $ rm -fR "$FAKEHOME"
  $ mkdir "$FAKEHOME"
  $ touch "$FAKEHOME/a"
  $ SUB="$FAKEHOME" hg clone -qr1 main main5
  abort: subrepo path contains illegal component: $SUB
  [255]
  $ ls "$FAKEHOME"
  a
  $ test -d "$FAKEHOME/.hg"
  [1]
  $ SUB="$FAKEHOME" hg -R main5 pull -u
  pulling from $TESTTMP/envvarsym/main
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  new changesets * (glob)
  .hgsubstate: untracked file differs
  abort: untracked files in working directory differ from files in requested revision
  [255]
  $ ls "$FAKEHOME"
  a
  $ test -d "$FAKEHOME/.hg"
  [1]

on clone empty subrepo with hg-managed fakehome directory,
then pull (and update):

  $ rm -fR "$FAKEHOME"
  $ hg init "$FAKEHOME"
  $ touch "$FAKEHOME/a"
  $ hg -R "$FAKEHOME" ci -qAm 'add fakehome file'
  $ SUB="$FAKEHOME" hg clone -qr1 main main6
  abort: subrepo path contains illegal component: $SUB
  [255]
  $ ls "$FAKEHOME"
  a
  $ SUB="$FAKEHOME" hg -R main6 pull -u
  pulling from $TESTTMP/envvarsym/main
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  new changesets * (glob)
  .hgsubstate: untracked file differs
  abort: untracked files in working directory differ from files in requested revision
  [255]
  $ ls "$FAKEHOME"
  a

on clone only symlink with hg-managed fakehome directory,
then pull (and update):

  $ rm -fR "$FAKEHOME"
  $ hg init "$FAKEHOME"
  $ touch "$FAKEHOME/a"
  $ hg -R "$FAKEHOME" ci -qAm 'add fakehome file'
  $ SUB="$FAKEHOME" hg clone -qr0 main main7
  $ ls "$FAKEHOME"
  a
  $ SUB="$FAKEHOME" hg -R main7 pull -uf
  pulling from $TESTTMP/envvarsym/main
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 3 changes to 2 files
  new changesets * (glob)
  abort: subrepo path contains illegal component: $SUB
  [255]
  $ ls "$FAKEHOME"
  a

  $ cd ..

#endif

Test drive letter
-----------------

Windows has a weird relative path that can change the drive letter, which
should also be prohibited on Windows.

prepare tampered repo:

  $ hg init driveletter
  $ cd driveletter
  $ hg import --bypass -qm 'add subrepo "X:"' - <<'EOF'
  > diff --git a/.hgsub b/.hgsub
  > new file mode 100644
  > --- /dev/null
  > +++ b/.hgsub
  > @@ -0,0 +1,1 @@
  > +X: = foo
  > diff --git a/.hgsubstate b/.hgsubstate
  > new file mode 100644
  > --- /dev/null
  > +++ b/.hgsubstate
  > @@ -0,0 +1,1 @@
  > +0000000000000000000000000000000000000000 X:
  > EOF
  $ cd ..

on clone (and update):

#if windows

  $ hg clone -q driveletter driveletter2
  abort: path contains illegal component: X:
  [255]

#else

  $ hg clone -q driveletter driveletter2
  $ ls driveletter2
  X:

#endif