view tests/test-convert-svn-move.t @ 33289:abd7dedbaa36

sparse: vendor Facebook-developed extension

Facebook has developed an extension to enable "sparse" checkouts -
a working directory with a subset of files. This feature is a critical
component in enabling repositories to scale to infinite number of
files while retaining reasonable performance. It's worth noting
that sparse checkout is only one possible solution to this problem:
another is virtual filesystems that realize files on first access.
But given that virtual filesystems may not be accessible to all
users, sparse checkout is necessary as a fallback.

Per mailing list discussion at
https://www.mercurial-scm.org/pipermail/mercurial-devel/2017-March/095868.html
we want to add sparse checkout to the Mercurial distribution via
roughly the following mechanism:

1. Vendor extension as-is with minimal modifications (this patch)
2. Refactor extension so it is more clearly experimental and inline
   with Mercurial practices
3. Move code from extension into core where possible
4. Drop experimental labeling and/or move feature into core
   after sign-off from narrow clone feature owners

This commit essentially copies the sparse extension and tests
from revision 71e0a2aeca92a4078fe1b8c76e32c88ff1929737 of the
https://bitbucket.org/facebook/hg-experimental repository.

A list of modifications made as part of vendoring is as follows:

* "EXPERIMENTAL" added to module docstring
* Imports were changed to match Mercurial style conventions
* "testedwith" value was updated to core Mercurial special value and
  comment boilerplate was inserted
* A "clone_sparse" function was renamed to "clonesparse" to appease
  the style checker
* Paths to the sparse extension in tests reflect built-in location
* test-sparse-extensions.t was renamed to test-sparse-fsmonitor.t
  and references to "simplecache" were removed. The test always skips
  because it isn't trivial to run it given the way we currently run
  fsmonitor tests
* A double empty line was removed from test-sparse-profiles.t

There are aspects of the added code that are obviously not ideal.
The goal is to make a minimal number of modifications as part of
the vendoring to make it easier to track changes from the original
implementation. Refactoring will occur in subsequent patches.

#require svn svn-bindings

  $ cat >> $HGRCPATH <<EOF
  > [extensions]
  > convert =
  > EOF

  $ svnadmin create svn-repo
  $ svnadmin load -q svn-repo < "$TESTDIR/svn/move.svndump"
  $ SVNREPOPATH=`pwd`/svn-repo
#if windows
  $ SVNREPOURL=file:///`$PYTHON -c "import urllib, sys; sys.stdout.write(urllib.quote(sys.argv[1]))" "$SVNREPOPATH"`
#else
  $ SVNREPOURL=file://`$PYTHON -c "import urllib, sys; sys.stdout.write(urllib.quote(sys.argv[1]))" "$SVNREPOPATH"`
#endif

Convert trunk and branches

  $ hg convert --datesort "$SVNREPOURL"/subproject A-hg
  initializing destination A-hg repository
  scanning source...
  sorting...
  converting...
  13 createtrunk
  12 moved1
  11 moved1
  10 moved2
  9 changeb and rm d2
  8 changeb and rm d2
  7 moved1again
  6 moved1again
  5 copyfilefrompast
  4 copydirfrompast
  3 add d3
  2 copy dir and remove subdir
  1 add d4old
  0 rename d4old into d4new

  $ cd A-hg
  $ hg log -G --template '{rev} {desc|firstline} files: {files}\n'
  o  13 rename d4old into d4new files: d4new/g d4old/g
  |
  o  12 add d4old files: d4old/g
  |
  o  11 copy dir and remove subdir files: d3/d31/e d4/d31/e d4/f
  |
  o  10 add d3 files: d3/d31/e d3/f
  |
  o  9 copydirfrompast files: d2/d
  |
  o  8 copyfilefrompast files: d
  |
  o  7 moved1again files: d1/b d1/c
  |
  | o  6 moved1again files:
  | |
  o |  5 changeb and rm d2 files: d1/b d2/d
  | |
  | o  4 changeb and rm d2 files: b
  | |
  o |  3 moved2 files: d2/d
  | |
  o |  2 moved1 files: d1/b d1/c
  | |
  | o  1 moved1 files: b c
  |
  o  0 createtrunk files:
  

Check move copy records

  $ hg st --rev 12:13 --copies
  A d4new/g
    d4old/g
  R d4old/g

Check branches

  $ hg branches
  default                       13:* (glob)
  d1                             6:* (glob)
  $ cd ..

  $ mkdir test-replace
  $ cd test-replace
  $ svnadmin create svn-repo
  $ svnadmin load -q svn-repo < "$TESTDIR/svn/replace.svndump"

Convert files being replaced by directories

  $ hg convert svn-repo hg-repo
  initializing destination hg-repo repository
  scanning source...
  sorting...
  converting...
  6 initial
  5 clobber symlink
  4 clobber1
  3 clobber2
  2 adddb
  1 clobberdir
  0 branch

  $ cd hg-repo

Manifest before

  $ hg -v manifest -r 1
  644   a
  644   d/b
  644   d2/a
  644 @ dlink
  644 @ dlink2
  644   dlink3

Manifest after clobber1

  $ hg -v manifest -r 2
  644   a/b
  644   d/b
  644   d2/a
  644   dlink/b
  644 @ dlink2
  644   dlink3

Manifest after clobber2

  $ hg -v manifest -r 3
  644   a/b
  644   d/b
  644   d2/a
  644   dlink/b
  644 @ dlink2
  644 @ dlink3

Manifest after clobberdir

  $ hg -v manifest -r 6
  644   a/b
  644   d/b
  644   d2/a
  644   d2/c
  644   dlink/b
  644 @ dlink2
  644 @ dlink3

Try updating

  $ hg up -qC default
  $ cd ..

Test convert progress bar

  $ cat >> $HGRCPATH <<EOF
  > [progress]
  > assume-tty = 1
  > delay = 0
  > changedelay = 0
  > format = topic bar number
  > refresh = 0
  > width = 60
  > EOF

  $ hg convert svn-repo hg-progress
  \r (no-eol) (esc)
  scanning [=====>                                      ] 1/7\r (no-eol) (esc)
  scanning [===========>                                ] 2/7\r (no-eol) (esc)
  scanning [=================>                          ] 3/7\r (no-eol) (esc)
  scanning [========================>                   ] 4/7\r (no-eol) (esc)
  scanning [==============================>             ] 5/7\r (no-eol) (esc)
  scanning [====================================>       ] 6/7\r (no-eol) (esc)
  scanning [===========================================>] 7/7\r (no-eol) (esc)
                                                              \r (no-eol) (esc)
  \r (no-eol) (esc)
  converting [                                          ] 0/7\r (no-eol) (esc)
  getting files [=====>                                 ] 1/6\r (no-eol) (esc)
  getting files [============>                          ] 2/6\r (no-eol) (esc)
  getting files [==================>                    ] 3/6\r (no-eol) (esc)
  getting files [=========================>             ] 4/6\r (no-eol) (esc)
  getting files [===============================>       ] 5/6\r (no-eol) (esc)
  getting files [======================================>] 6/6\r (no-eol) (esc)
                                                              \r (no-eol) (esc)
  \r (no-eol) (esc)
  converting [=====>                                    ] 1/7\r (no-eol) (esc)
  scanning paths [                                      ] 0/1\r (no-eol) (esc)
  getting files [======================================>] 1/1\r (no-eol) (esc)
                                                              \r (no-eol) (esc)
  \r (no-eol) (esc)
  converting [===========>                              ] 2/7\r (no-eol) (esc)
  scanning paths [                                      ] 0/2\r (no-eol) (esc)
  scanning paths [==================>                   ] 1/2\r (no-eol) (esc)
  getting files [========>                              ] 1/4\r (no-eol) (esc)
  getting files [==================>                    ] 2/4\r (no-eol) (esc)
  getting files [============================>          ] 3/4\r (no-eol) (esc)
  getting files [======================================>] 4/4\r (no-eol) (esc)
                                                              \r (no-eol) (esc)
  \r (no-eol) (esc)
  converting [=================>                        ] 3/7\r (no-eol) (esc)
  scanning paths [                                      ] 0/1\r (no-eol) (esc)
  getting files [======================================>] 1/1\r (no-eol) (esc)
                                                              \r (no-eol) (esc)
  \r (no-eol) (esc)
  converting [=======================>                  ] 4/7\r (no-eol) (esc)
  scanning paths [                                      ] 0/1\r (no-eol) (esc)
  getting files [======================================>] 1/1\r (no-eol) (esc)
                                                              \r (no-eol) (esc)
  \r (no-eol) (esc)
  converting [=============================>            ] 5/7\r (no-eol) (esc)
  scanning paths [                                      ] 0/1\r (no-eol) (esc)
  getting files [===>                                   ] 1/8\r (no-eol) (esc)
  getting files [========>                              ] 2/8\r (no-eol) (esc)
  getting files [=============>                         ] 3/8\r (no-eol) (esc)
  getting files [==================>                    ] 4/8\r (no-eol) (esc)
  getting files [=======================>               ] 5/8\r (no-eol) (esc)
  getting files [============================>          ] 6/8\r (no-eol) (esc)
  getting files [=================================>     ] 7/8\r (no-eol) (esc)
  getting files [======================================>] 8/8\r (no-eol) (esc)
                                                              \r (no-eol) (esc)
  \r (no-eol) (esc)
  converting [===================================>      ] 6/7\r (no-eol) (esc)
  scanning paths [                                      ] 0/3\r (no-eol) (esc)
  scanning paths [===========>                          ] 1/3\r (no-eol) (esc)
  scanning paths [========================>             ] 2/3\r (no-eol) (esc)
  getting files [===>                                   ] 1/8\r (no-eol) (esc)
  getting files [========>                              ] 2/8\r (no-eol) (esc)
  getting files [=============>                         ] 3/8\r (no-eol) (esc)
  getting files [==================>                    ] 4/8\r (no-eol) (esc)
  getting files [=======================>               ] 5/8\r (no-eol) (esc)
  getting files [============================>          ] 6/8\r (no-eol) (esc)
  getting files [=================================>     ] 7/8\r (no-eol) (esc)
  getting files [======================================>] 8/8\r (no-eol) (esc)
                                                              \r (no-eol) (esc)
  initializing destination hg-progress repository
  scanning source...
  sorting...
  converting...
  6 initial
  5 clobber symlink
  4 clobber1
  3 clobber2
  2 adddb
  1 clobberdir
  0 branch

  $ cd ..