tests/test-directaccess.t

lfs: check content length after downloading content

Adapted from the Facebook repo[1].  The intent is to distinguish between the
connection dying and getting served a corrupt blob.

The original message:

HTTP makes no provision to tell your client that you failed halfway through
producing your response and won't have the answer they're looking for. So, if a
LFS server fails while producing a response, then we'll report an OID mismatch.

We can do a little better and disambiguate between "the server sent us the
wrong blob" (very scary) and "the server crashed" (merely annoying) by looking
at the content length of the response we got back. If it's not what was
advertised, we can reasonably safely assume the server crashed.

[1] https://github.com/facebookexperimental/eden/commit/2a4a6fab4e882ed89b948bfc1e7d56d7c3c99dd2

Differential Revision: https://phab.mercurial-scm.org/D7881

Tests for access level on hidden commits by various commands on based of their
type.

Setting the required config to start this

  $ cat >> $HGRCPATH <<EOF
  > [experimental]
  > evolution=createmarkers, allowunstable
  > directaccess=True
  > directaccess.revnums=True
  > [extensions]
  > amend =
  > EOF

  $ hg init repo
  $ cd repo
  $ for ch in a b c; do touch $ch; echo "foo" >> $ch; hg ci -Aqm "Added "$ch; done

  $ hg log -G -T '{rev}:{node} {desc}' --hidden
  @  2:28ad74487de9599d00d81085be739c61fc340652 Added c
  |
  o  1:29becc82797a4bc11ec8880b58eaecd2ab3e7760 Added b
  |
  o  0:18d04c59bb5d2d4090ad9a5b59bd6274adb63add Added a
  
  $ echo "bar" >> c
  $ hg amend

  $ hg log -G -T '{rev}:{node} {desc}' --hidden
  @  3:2443a0e664694756d8b435d06b6ad84f941b6fc0 Added c
  |
  | x  2:28ad74487de9599d00d81085be739c61fc340652 Added c
  |/
  o  1:29becc82797a4bc11ec8880b58eaecd2ab3e7760 Added b
  |
  o  0:18d04c59bb5d2d4090ad9a5b59bd6274adb63add Added a
  
Testing read only commands on the hidden revision

Testing with rev number

  $ hg exp 2 --config experimental.directaccess.revnums=False
  abort: hidden revision '2' was rewritten as: 2443a0e66469!
  (use --hidden to access hidden revisions)
  [255]

  $ hg exp 2
  # HG changeset patch
  # User test
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID 28ad74487de9599d00d81085be739c61fc340652
  # Parent  29becc82797a4bc11ec8880b58eaecd2ab3e7760
  Added c
  
  diff -r 29becc82797a -r 28ad74487de9 c
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/c	Thu Jan 01 00:00:00 1970 +0000
  @@ -0,0 +1,1 @@
  +foo

  $ hg log -r 2
  changeset:   2:28ad74487de9
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  obsolete:    rewritten using amend as 3:2443a0e66469
  summary:     Added c
  
  $ hg identify -r 2
  28ad74487de9

  $ hg status --change 2
  A c

  $ hg status --change 2 --config experimental.directaccess.revnums=False
  abort: hidden revision '2' was rewritten as: 2443a0e66469!
  (use --hidden to access hidden revisions)
  [255]

  $ hg diff -c 2
  diff -r 29becc82797a -r 28ad74487de9 c
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/c	Thu Jan 01 00:00:00 1970 +0000
  @@ -0,0 +1,1 @@
  +foo

Testing with hash

`hg export`

  $ hg exp 28ad74
  # HG changeset patch
  # User test
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID 28ad74487de9599d00d81085be739c61fc340652
  # Parent  29becc82797a4bc11ec8880b58eaecd2ab3e7760
  Added c
  
  diff -r 29becc82797a -r 28ad74487de9 c
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/c	Thu Jan 01 00:00:00 1970 +0000
  @@ -0,0 +1,1 @@
  +foo

`hg log`

  $ hg log -r 28ad74
  changeset:   2:28ad74487de9
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  obsolete:    rewritten using amend as 3:2443a0e66469
  summary:     Added c
  
`hg cat`

  $ hg cat -r 28ad74 c
  foo

`hg diff`

  $ hg diff -c 28ad74
  diff -r 29becc82797a -r 28ad74487de9 c
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/c	Thu Jan 01 00:00:00 1970 +0000
  @@ -0,0 +1,1 @@
  +foo

`hg files`

  $ hg files -r 28ad74
  a
  b
  c

`hg identify`

  $ hg identify -r 28ad74
  28ad74487de9

`hg annotate`

  $ hg annotate -r 28ad74 a
  0: foo

`hg status`

  $ hg status --change 28ad74
  A c

`hg archive`

This should not throw error
  $ hg archive -r 28ad74 foo

`hg update`

  $ hg up 28ad74
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  updated to hidden changeset 28ad74487de9
  (hidden revision '28ad74487de9' was rewritten as: 2443a0e66469)

  $ hg up 3
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ hg up
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved

`hg revert`

  $ hg revert -r 28ad74 --all
  reverting c

  $ hg diff
  diff -r 2443a0e66469 c
  --- a/c	Thu Jan 01 00:00:00 1970 +0000
  +++ b/c	Thu Jan 01 00:00:00 1970 +0000
  @@ -1,2 +1,1 @@
   foo
  -bar

Test special hash/rev

  $ hg log -qr 'null:wdir() & 000000000000'
  -1:000000000000
  $ hg log -qr 'null:wdir() & ffffffffffff'
  2147483647:ffffffffffff
  $ hg log -qr 'null:wdir() & rev(-1)'
  -1:000000000000
  $ hg log -qr 'null:wdir() & rev(2147483647)'
  2147483647:ffffffffffff
  $ hg log -qr 'null:wdir() & 2147483647'
  2147483647:ffffffffffff

Commands with undefined intent should not work right now

  $ hg phase -r 28ad74
  abort: hidden revision '28ad74' was rewritten as: 2443a0e66469!
  (use --hidden to access hidden revisions)
  [255]

  $ hg phase -r 2
  abort: hidden revision '2' was rewritten as: 2443a0e66469!
  (use --hidden to access hidden revisions)
  [255]

Setting a bookmark will make that changeset unhidden, so this should come in end

  $ hg bookmarks -r 28ad74 book
  bookmarking hidden changeset 28ad74487de9
  (hidden revision '28ad74487de9' was rewritten as: 2443a0e66469)

  $ hg bookmarks
     book                      2:28ad74487de9