tests/test-subrepo-git.t

wireproto: implement basic frame reading and processing

We just implemented support for writing frames. Now let's implement
support for reading them.

The bulk of the new code is for a class that maintains the state of
a server. Essentially, you construct an instance, feed frames to it,
and it tells you what you should do next. The design is inspired by
the "sans I/O" movement and the reactor pattern. We don't want to
perform I/O or any major blocking event during frame ingestion because
this arbitrarily limits ways that server pieces can be implemented.
For example, it makes it much harder to swap in an alternate
implementation based on asyncio or do crazy things like have requests
dispatch to other processes.

We do still implement readframe() which does I/O. But it is decoupled
from the server reactor. And important parsing of frame headers is
a standalone function. So I/O is only needed to obtain frame data.

Because testing server-side ingest is useful and difficult on running
servers, we create a new "debugreflect" endpoint that will echo back
to the client what was received and how it was interpreted. This could
be useful for a server admin, someone implementing a client. But
immediately, it is useful for testing: we're able to demonstrate that
frames are parsed correctly and turned into requests to run commands
without having to implement command dispatch on the server!

In addition, we implement Python level unit tests for the reactor.
This is vastly more efficient than sending requests to the
"debugreflect" endpoint and vastly more powerful for advanced
testing.

Differential Revision: https://phab.mercurial-scm.org/D2852

#require git

make git commits repeatable

  $ cat >> $HGRCPATH <<EOF
  > [defaults]
  > commit = -d "0 0"
  > EOF

  $ 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
  $ GIT_CONFIG_NOSYSTEM=1; export GIT_CONFIG_NOSYSTEM

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

git subrepo is disabled by default

  $ hg commit -m 'new git subrepo'
  abort: git subrepos not allowed
  (see 'hg help config.subrepos' for details)
  [255]

so enable it

  $ cat >> $HGRCPATH <<EOF
  > [subrepos]
  > git:allowed = true
  > EOF

  $ 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
  $ cd ..

clone with subrepo disabled (update should fail)

  $ hg clone t -U tc2 --config subrepos.allowed=false
  $ hg update -R tc2 --config subrepos.allowed=false
  abort: subrepos not enabled
  (see 'hg help config.subrepos' for details)
  [255]
  $ ls tc2
  a

  $ hg clone t tc3 --config subrepos.allowed=false
  updating to branch default
  abort: subrepos not enabled
  (see 'hg help config.subrepos' for details)
  [255]
  $ ls tc3
  a

update to previous substate

  $ cd tc
  $ 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 diff --subrepos
  diff --git a/s/g b/s/g
  index 089258f..85341ee 100644
  --- a/s/g
  +++ b/s/g
  @@ -1,2 +1,3 @@
   g
   gg
  +ggg
  $ 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
  $ hg status --subrepos
  $ echo f > f
  $ hg status --subrepos
  ? s/f
  $ hg add .
  adding 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
  pushing branch testing of subrepository "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
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (+1 heads)
  new changesets 089416c11d73
  (run 'hg heads' to see heads, 'hg merge' to merge)
  $ hg merge 2>/dev/null
   subrepository s diverged (local revision: 7969594, remote revision: aa84837)
  (M)erge, keep (l)ocal [working copy] or keep (r)emote [merge rev]? 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)
  $ hg st --subrepos s
  A s/f
  $ 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
  pushing branch testing of subrepository "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 subrepository "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
  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 (glob)
  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

  $ hg -R ../tc archive -S ../archive.tgz --prefix '.' 2>/dev/null
  $ tar -tzf ../archive.tgz | sort | grep -v pax_global_header
  .hg_archival.txt
  .hgsub
  .hgsubstate
  a
  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

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 subrepository "s")
  [255]
  $ hg commit --subrepos -qm missing
  abort: subrepo s is missing (in subrepository "s")
  [255]

#if symlink
Don't crash if subrepo is a broken symlink
  $ ln -s broken s
  $ hg status -S
  abort: subrepo 's' traverses symbolic link
  [255]
  $ hg push -q
  abort: subrepo 's' traverses symbolic link
  [255]
  $ hg commit --subrepos -qm missing
  abort: subrepo 's' traverses symbolic link
  [255]
  $ rm s
#endif

  $ 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
  ? s/f2
  $ ls s
  f
  f1
  f2
  g
  $ hg update --clean
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg status -S
  ? s/f1
  ? s/f2
  $ 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 subrepositories, 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: da5f5b1, remote revision: aa84837)
  (M)erge, keep (l)ocal [working copy] or keep (r)emote [destination]? 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 (glob)
  HEAD is now at aa84837* f (glob)
  $ cd ..
  $ hg update 1
   subrepository s diverged (local revision: 32a3438, remote revision: da5f5b1)
  (M)erge, keep (l)ocal [working copy] or keep (r)emote [destination]? 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: 32a3438, remote revision: 32a3438)
  (M)erge, keep (l)ocal [working copy] or keep (r)emote [destination]? 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 (glob)
  $ cd ..
  $ hg update 1
  Previous HEAD position was 32a3438* fff (glob)
  HEAD is now at da5f5b1* g (glob)
  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*: $ENOENT$
  [1]
#else
error: The filename, directory name, or volume label syntax is incorrect
  $ hg forget 'notafile'
  notafile: * (glob)
  [1]
#endif

  $ cd ..

Test sanitizing ".hg/hgrc" in subrepo

  $ cd t
  $ hg tip -q
  7:af6d2edbb0d3
  $ hg update -q -C af6d2edbb0d3
  $ cd s
  $ git checkout -q -b sanitize-test
  $ mkdir .hg
  $ echo '.hg/hgrc in git repo' > .hg/hgrc
  $ mkdir -p sub/.hg
  $ echo 'sub/.hg/hgrc in git repo' > sub/.hg/hgrc
  $ git add .hg sub
  $ git commit -qm 'add .hg/hgrc to be sanitized at hg update'
  $ git push -q origin sanitize-test
  $ cd ..
  $ grep ' s$' .hgsubstate
  32a343883b74769118bb1d3b4b1fbf9156f4dddc s
  $ hg commit -qm 'commit with git revision including .hg/hgrc'
  $ hg parents -q
  8:3473d20bddcf
  $ grep ' s$' .hgsubstate
  c4069473b459cf27fd4d7c2f50c4346b4e936599 s
  $ cd ..

  $ hg -R tc pull -q
  $ hg -R tc update -q -C 3473d20bddcf 2>&1 | sort
  warning: removing potentially hostile 'hgrc' in '$TESTTMP/tc/s/.hg'
  warning: removing potentially hostile 'hgrc' in '$TESTTMP/tc/s/sub/.hg'
  $ cd tc
  $ hg parents -q
  8:3473d20bddcf
  $ grep ' s$' .hgsubstate
  c4069473b459cf27fd4d7c2f50c4346b4e936599 s
  $ test -f s/.hg/hgrc
  [1]
  $ test -f s/sub/.hg/hgrc
  [1]
  $ cd ..

additional test for "git merge --ff" route:

  $ cd t
  $ hg tip -q
  8:3473d20bddcf
  $ hg update -q -C af6d2edbb0d3
  $ cd s
  $ git checkout -q testing
  $ mkdir .hg
  $ echo '.hg/hgrc in git repo' > .hg/hgrc
  $ mkdir -p sub/.hg
  $ echo 'sub/.hg/hgrc in git repo' > sub/.hg/hgrc
  $ git add .hg sub
  $ git commit -qm 'add .hg/hgrc to be sanitized at hg update (git merge --ff)'
  $ git push -q origin testing
  $ cd ..
  $ grep ' s$' .hgsubstate
  32a343883b74769118bb1d3b4b1fbf9156f4dddc s
  $ hg commit -qm 'commit with git revision including .hg/hgrc'
  $ hg parents -q
  9:ed23f7fe024e
  $ grep ' s$' .hgsubstate
  f262643c1077219fbd3858d54e78ef050ef84fbf s
  $ cd ..

  $ cd tc
  $ hg update -q -C af6d2edbb0d3
  $ test -f s/.hg/hgrc
  [1]
  $ test -f s/sub/.hg/hgrc
  [1]
  $ cd ..
  $ hg -R tc pull -q
  $ hg -R tc update -q -C ed23f7fe024e 2>&1 | sort
  warning: removing potentially hostile 'hgrc' in '$TESTTMP/tc/s/.hg'
  warning: removing potentially hostile 'hgrc' in '$TESTTMP/tc/s/sub/.hg'
  $ cd tc
  $ hg parents -q
  9:ed23f7fe024e
  $ grep ' s$' .hgsubstate
  f262643c1077219fbd3858d54e78ef050ef84fbf s
  $ test -f s/.hg/hgrc
  [1]
  $ test -f s/sub/.hg/hgrc
  [1]

Test that sanitizing is omitted in meta data area:

  $ mkdir s/.git/.hg
  $ echo '.hg/hgrc in git metadata area' > s/.git/.hg/hgrc
  $ hg update -q -C af6d2edbb0d3
  checking out detached HEAD in subrepository "s"
  check out a git branch if you intend to make changes

check differences made by most recent change
  $ cd s
  $ cat > foobar << EOF
  > woopwoop
  > 
  > foo
  > bar
  > EOF
  $ git add foobar
  $ cd ..

  $ hg diff --subrepos
  diff --git a/s/foobar b/s/foobar
  new file mode 100644
  index 0000000..8a5a5e2
  --- /dev/null
  +++ b/s/foobar
  @@ -0,0 +1,4 @@
  +woopwoop
  +
  +foo
  +bar

  $ hg commit --subrepos -m "Added foobar"
  committing subrepository s
  created new head

  $ hg diff -c . --subrepos --nodates
  diff -r af6d2edbb0d3 -r 255ee8cf690e .hgsubstate
  --- a/.hgsubstate
  +++ b/.hgsubstate
  @@ -1,1 +1,1 @@
  -32a343883b74769118bb1d3b4b1fbf9156f4dddc s
  +fd4dbf828a5b2fcd36b2bcf21ea773820970d129 s
  diff --git a/s/foobar b/s/foobar
  new file mode 100644
  index 0000000..8a5a5e2
  --- /dev/null
  +++ b/s/foobar
  @@ -0,0 +1,4 @@
  +woopwoop
  +
  +foo
  +bar

check output when only diffing the subrepository
  $ hg diff -c . --subrepos s
  diff --git a/s/foobar b/s/foobar
  new file mode 100644
  index 0000000..8a5a5e2
  --- /dev/null
  +++ b/s/foobar
  @@ -0,0 +1,4 @@
  +woopwoop
  +
  +foo
  +bar

check output when diffing something else
  $ hg diff -c . --subrepos .hgsubstate --nodates
  diff -r af6d2edbb0d3 -r 255ee8cf690e .hgsubstate
  --- a/.hgsubstate
  +++ b/.hgsubstate
  @@ -1,1 +1,1 @@
  -32a343883b74769118bb1d3b4b1fbf9156f4dddc s
  +fd4dbf828a5b2fcd36b2bcf21ea773820970d129 s

add new changes, including whitespace
  $ cd s
  $ cat > foobar << EOF
  > woop    woop
  > 
  > foo
  > bar
  > EOF
  $ echo foo > barfoo
  $ git add barfoo
  $ cd ..

  $ hg diff --subrepos --ignore-all-space
  diff --git a/s/barfoo b/s/barfoo
  new file mode 100644
  index 0000000..257cc56
  --- /dev/null
  +++ b/s/barfoo
  @@ -0,0 +1* @@ (glob)
  +foo
  $ hg diff --subrepos s/foobar
  diff --git a/s/foobar b/s/foobar
  index 8a5a5e2..bd5812a 100644
  --- a/s/foobar
  +++ b/s/foobar
  @@ -1,4 +1,4 @@
  -woopwoop
  +woop    woop
   
   foo
   bar

execute a diffstat
the output contains a regex, because git 1.7.10 and 1.7.11
 change the amount of whitespace
  $ hg diff --subrepos --stat
  \s*barfoo \|\s+1 \+ (re)
  \s*foobar \|\s+2 \+- (re)
   2 files changed, 2 insertions\(\+\), 1 deletions?\(-\) (re)

adding an include should ignore the other elements
  $ hg diff --subrepos -I s/foobar
  diff --git a/s/foobar b/s/foobar
  index 8a5a5e2..bd5812a 100644
  --- a/s/foobar
  +++ b/s/foobar
  @@ -1,4 +1,4 @@
  -woopwoop
  +woop    woop
   
   foo
   bar

adding an exclude should ignore this element
  $ hg diff --subrepos -X s/foobar
  diff --git a/s/barfoo b/s/barfoo
  new file mode 100644
  index 0000000..257cc56
  --- /dev/null
  +++ b/s/barfoo
  @@ -0,0 +1* @@ (glob)
  +foo

moving a file should show a removal and an add
  $ hg revert --all
  reverting subrepo ../gitroot
  $ cd s
  $ git mv foobar woop
  $ cd ..
  $ hg diff --subrepos
  diff --git a/s/foobar b/s/foobar
  deleted file mode 100644
  index 8a5a5e2..0000000
  --- a/s/foobar
  +++ /dev/null
  @@ -1,4 +0,0 @@
  -woopwoop
  -
  -foo
  -bar
  diff --git a/s/woop b/s/woop
  new file mode 100644
  index 0000000..8a5a5e2
  --- /dev/null
  +++ b/s/woop
  @@ -0,0 +1,4 @@
  +woopwoop
  +
  +foo
  +bar
  $ rm s/woop

revert the subrepository
  $ hg revert --all
  reverting subrepo ../gitroot

  $ hg status --subrepos
  ? s/barfoo
  ? s/foobar.orig

  $ mv s/foobar.orig s/foobar

  $ hg revert --no-backup s
  reverting subrepo ../gitroot

  $ hg status --subrepos
  ? s/barfoo

revert moves orig files to the right place
  $ echo 'bloop' > s/foobar
  $ hg revert --all --verbose --config 'ui.origbackuppath=.hg/origbackups'
  reverting subrepo ../gitroot
  creating directory: $TESTTMP/tc/.hg/origbackups
  saving current version of foobar as $TESTTMP/tc/.hg/origbackups/foobar
  $ ls .hg/origbackups
  foobar
  $ rm -rf .hg/origbackups

show file at specific revision
  $ cat > s/foobar << EOF
  > woop    woop
  > fooo bar
  > EOF
  $ hg commit --subrepos -m "updated foobar"
  committing subrepository s
  $ cat > s/foobar << EOF
  > current foobar
  > (should not be visible using hg cat)
  > EOF

  $ hg cat -r . s/foobar
  woop    woop
  fooo bar (no-eol)
  $ hg cat -r "parents(.)" s/foobar > catparents

  $ mkdir -p tmp/s

  $ hg cat -r "parents(.)" --output tmp/%% s/foobar
  $ diff tmp/% catparents

  $ hg cat -r "parents(.)" --output tmp/%s s/foobar
  $ diff tmp/foobar catparents

  $ hg cat -r "parents(.)" --output tmp/%d/otherfoobar s/foobar
  $ diff tmp/s/otherfoobar catparents

  $ hg cat -r "parents(.)" --output tmp/%p s/foobar
  $ diff tmp/s/foobar catparents

  $ hg cat -r "parents(.)" --output tmp/%H s/foobar
  $ diff tmp/255ee8cf690ec86e99b1e80147ea93ece117cd9d catparents

  $ hg cat -r "parents(.)" --output tmp/%R s/foobar
  $ diff tmp/10 catparents

  $ hg cat -r "parents(.)" --output tmp/%h s/foobar
  $ diff tmp/255ee8cf690e catparents

  $ rm tmp/10
  $ hg cat -r "parents(.)" --output tmp/%r s/foobar
  $ diff tmp/10 catparents

  $ mkdir tmp/tc
  $ hg cat -r "parents(.)" --output tmp/%b/foobar s/foobar
  $ diff tmp/tc/foobar catparents

cleanup
  $ rm -r tmp
  $ rm catparents

add git files, using either files or patterns
  $ echo "hsss! hsssssssh!" > s/snake.python
  $ echo "ccc" > s/c.c
  $ echo "cpp" > s/cpp.cpp

  $ hg add s/snake.python s/c.c s/cpp.cpp
  $ hg st --subrepos s
  M s/foobar
  A s/c.c
  A s/cpp.cpp
  A s/snake.python
  ? s/barfoo
  $ hg revert s
  reverting subrepo ../gitroot

  $ hg add --subrepos "glob:**.python"
  adding s/snake.python
  $ hg st --subrepos s
  A s/snake.python
  ? s/barfoo
  ? s/c.c
  ? s/cpp.cpp
  ? s/foobar.orig
  $ hg revert s
  reverting subrepo ../gitroot

  $ hg add --subrepos s
  adding s/barfoo
  adding s/c.c
  adding s/cpp.cpp
  adding s/foobar.orig
  adding s/snake.python
  $ hg st --subrepos s
  A s/barfoo
  A s/c.c
  A s/cpp.cpp
  A s/foobar.orig
  A s/snake.python
  $ hg revert s
  reverting subrepo ../gitroot
make sure everything is reverted correctly
  $ hg st --subrepos s
  ? s/barfoo
  ? s/c.c
  ? s/cpp.cpp
  ? s/foobar.orig
  ? s/snake.python

  $ hg add --subrepos --exclude "path:s/c.c"
  adding s/barfoo
  adding s/cpp.cpp
  adding s/foobar.orig
  adding s/snake.python
  $ hg st --subrepos s
  A s/barfoo
  A s/cpp.cpp
  A s/foobar.orig
  A s/snake.python
  ? s/c.c
  $ hg revert --all -q

.hgignore should not have influence in subrepos
  $ cat > .hgignore << EOF
  > syntax: glob
  > *.python
  > EOF
  $ hg add .hgignore
  $ hg add --subrepos "glob:**.python" s/barfoo
  adding s/snake.python
  $ hg st --subrepos s
  A s/barfoo
  A s/snake.python
  ? s/c.c
  ? s/cpp.cpp
  ? s/foobar.orig
  $ hg revert --all -q

.gitignore should have influence,
except for explicitly added files (no patterns)
  $ cat > s/.gitignore << EOF
  > *.python
  > EOF
  $ hg add s/.gitignore
  $ hg st --subrepos s
  A s/.gitignore
  ? s/barfoo
  ? s/c.c
  ? s/cpp.cpp
  ? s/foobar.orig
  $ hg st --subrepos s --all
  A s/.gitignore
  ? s/barfoo
  ? s/c.c
  ? s/cpp.cpp
  ? s/foobar.orig
  I s/snake.python
  C s/f
  C s/foobar
  C s/g
  $ hg add --subrepos "glob:**.python"
  $ hg st --subrepos s
  A s/.gitignore
  ? s/barfoo
  ? s/c.c
  ? s/cpp.cpp
  ? s/foobar.orig
  $ hg add --subrepos s/snake.python
  $ hg st --subrepos s
  A s/.gitignore
  A s/snake.python
  ? s/barfoo
  ? s/c.c
  ? s/cpp.cpp
  ? s/foobar.orig

correctly do a dry run
  $ hg add --subrepos s --dry-run
  adding s/barfoo
  adding s/c.c
  adding s/cpp.cpp
  adding s/foobar.orig
  $ hg st --subrepos s
  A s/.gitignore
  A s/snake.python
  ? s/barfoo
  ? s/c.c
  ? s/cpp.cpp
  ? s/foobar.orig

error given when adding an already tracked file
  $ hg add s/.gitignore
  s/.gitignore already tracked!
  [1]
  $ hg add s/g
  s/g already tracked!
  [1]

removed files can be re-added
removing files using 'rm' or 'git rm' has the same effect,
since we ignore the staging area
  $ hg ci --subrepos -m 'snake'
  committing subrepository s
  $ cd s
  $ rm snake.python
(remove leftover .hg so Mercurial doesn't look for a root here)
  $ rm -rf .hg
  $ hg status --subrepos --all .
  R snake.python
  ? barfoo
  ? c.c
  ? cpp.cpp
  ? foobar.orig
  C .gitignore
  C f
  C foobar
  C g
  $ git rm snake.python
  rm 'snake.python'
  $ hg status --subrepos --all .
  R snake.python
  ? barfoo
  ? c.c
  ? cpp.cpp
  ? foobar.orig
  C .gitignore
  C f
  C foobar
  C g
  $ touch snake.python
  $ cd ..
  $ hg add s/snake.python
  $ hg status -S
  M s/snake.python
  ? .hgignore
  ? s/barfoo
  ? s/c.c
  ? s/cpp.cpp
  ? s/foobar.orig
  $ hg revert --all -q

make sure we show changed files, rather than changed subtrees
  $ mkdir s/foo
  $ touch s/foo/bwuh
  $ hg add s/foo/bwuh
  $ hg commit -S -m "add bwuh"
  committing subrepository s
  $ hg status -S --change .
  M .hgsubstate
  A s/foo/bwuh
  ? s/barfoo
  ? s/c.c
  ? s/cpp.cpp
  ? s/foobar.orig
  ? s/snake.python.orig

#if git19

test for Git CVE-2016-3068
  $ hg init malicious-subrepository
  $ cd malicious-subrepository
  $ echo "s = [git]ext::sh -c echo% pwned:% \$PWNED_MSG% >pwned.txt" > .hgsub
  $ git init s
  Initialized empty Git repository in $TESTTMP/tc/malicious-subrepository/s/.git/
  $ cd s
  $ git commit --allow-empty -m 'empty'
  [master (root-commit) 153f934] empty
  $ cd ..
  $ hg add .hgsub
  $ hg commit -m "add subrepo"
  $ cd ..
  $ rm -f pwned.txt
  $ unset GIT_ALLOW_PROTOCOL
  $ PWNED_MSG="your git is too old or mercurial has regressed" hg clone \
  > malicious-subrepository malicious-subrepository-protected
  Cloning into '$TESTTMP/tc/malicious-subrepository-protected/s'...
  fatal: transport 'ext' not allowed
  updating to branch default
  cloning subrepo s from ext::sh -c echo% pwned:% $PWNED_MSG% >pwned.txt
  abort: git clone error 128 in s (in subrepository "s")
  [255]
  $ f -Dq pwned.txt
  pwned.txt: file not found

whitelisting of ext should be respected (that's the git submodule behaviour)
  $ rm -f pwned.txt
  $ env GIT_ALLOW_PROTOCOL=ext PWNED_MSG="you asked for it" hg clone \
  > malicious-subrepository malicious-subrepository-clone-allowed
  Cloning into '$TESTTMP/tc/malicious-subrepository-clone-allowed/s'...
  fatal: Could not read from remote repository.
  
  Please make sure you have the correct access rights
  and the repository exists.
  updating to branch default
  cloning subrepo s from ext::sh -c echo% pwned:% $PWNED_MSG% >pwned.txt
  abort: git clone error 128 in s (in subrepository "s")
  [255]
  $ f -Dq pwned.txt
  pwned: you asked for it

#endif

test for ssh exploit with git subrepos 2017-07-25

  $ hg init malicious-proxycommand
  $ cd malicious-proxycommand
  $ echo 's = [git]ssh://-oProxyCommand=rm${IFS}non-existent/path' > .hgsub
  $ git init s
  Initialized empty Git repository in $TESTTMP/tc/malicious-proxycommand/s/.git/
  $ cd s
  $ git commit --allow-empty -m 'empty'
  [master (root-commit) 153f934] empty
  $ cd ..
  $ hg add .hgsub
  $ hg ci -m 'add subrepo'
  $ cd ..
  $ hg clone malicious-proxycommand malicious-proxycommand-clone
  updating to branch default
  abort: potentially unsafe url: 'ssh://-oProxyCommand=rm${IFS}non-existent/path' (in subrepository "s")
  [255]

also check that a percent encoded '-' (%2D) doesn't work

  $ cd malicious-proxycommand
  $ echo 's = [git]ssh://%2DoProxyCommand=rm${IFS}non-existent/path' > .hgsub
  $ hg ci -m 'change url to percent encoded'
  $ cd ..
  $ rm -r malicious-proxycommand-clone
  $ hg clone malicious-proxycommand malicious-proxycommand-clone
  updating to branch default
  abort: potentially unsafe url: 'ssh://-oProxyCommand=rm${IFS}non-existent/path' (in subrepository "s")
  [255]