tests/test-remotefilelog-sparse.t

clone: make sure we warm the cache after a clone

This work around any deviciency/limitation of the clone process. In our case
this ensure the persistent nodemap exist with valid content.

Ideally, the cloning process would also do "the right thing". However since
older server will never be able to do "the right thing". The local workaround
will be necessary anyway.

I am not worried by the performance impact of this as `hg clone` is non-instant
on large repositories where is could matters. Warming the cache if they are
already correct is very fast. And if they are not already warm, this seems like
a good time to do so.

This impact various test as more cache are now warmed sooner, all the change
should be harmless.

Differential Revision: https://phab.mercurial-scm.org/D9789

#require no-windows

  $ . "$TESTDIR/remotefilelog-library.sh"

  $ hg init master
  $ cd master
  $ cat >> .hg/hgrc <<EOF
  > [remotefilelog]
  > server=True
  > EOF
  $ echo x > x
  $ echo z > z
  $ hg commit -qAm x1
  $ echo x2 > x
  $ echo z2 > z
  $ hg commit -qAm x2
  $ hg bookmark foo

  $ cd ..

# prefetch a revision w/ a sparse checkout

  $ hgcloneshallow ssh://user@dummy/master shallow --noupdate
  streaming all changes
  2 files to transfer, 527 bytes of data
  transferred 527 bytes in 0.* seconds (*/sec) (glob)
  searching for changes
  no changes found
  $ cd shallow
  $ printf "[extensions]\nsparse=\n" >> .hg/hgrc

  $ hg debugsparse -I x
  $ hg prefetch -r 0
  1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob)

  $ hg cat -r 0 x
  x

  $ hg debugsparse -I z
  $ hg prefetch -r 0
  1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob)

  $ hg cat -r 0 z
  z

# prefetch sparse only on pull when configured

  $ printf "[remotefilelog]\npullprefetch=bookmark()\n" >> .hg/hgrc
  $ hg strip tip
  saved backup bundle to $TESTTMP/shallow/.hg/strip-backup/876b1317060d-b2e91d8d-backup.hg (glob)

  $ hg debugsparse --delete z

  $ clearcache
  $ hg pull
  pulling from ssh://user@dummy/master
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  updating bookmark foo
  added 1 changesets with 0 changes to 0 files
  new changesets 876b1317060d
  (run 'hg update' to get a working copy)
  prefetching file contents
  1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob)

# Dont consider filtered files when doing copy tracing

## Push an unrelated commit
  $ cd ../

  $ hgcloneshallow ssh://user@dummy/master shallow2
  streaming all changes
  2 files to transfer, 527 bytes of data
  transferred 527 bytes in 0.* seconds (*) (glob)
  searching for changes
  no changes found
  updating to branch default
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob)
  $ cd shallow2
  $ printf "[extensions]\nsparse=\n" >> .hg/hgrc

  $ hg up -q 0
  2 files fetched over 1 fetches - (2 misses, 0.00% hit ratio) over *s (glob)
  $ touch a
  $ hg ci -Aqm a
  $ hg push -q -f

## Pull the unrelated commit and rebase onto it - verify unrelated file was not
pulled

  $ cd ../shallow
  $ hg up -q 1
  $ hg pull -q
  $ hg debugsparse -I z
  $ clearcache
  $ hg prefetch -r '. + .^' -I x -I z
  4 files fetched over 1 fetches - (4 misses, 0.00% hit ratio) over * (glob)
  $ hg rebase -d 2 --keep
  rebasing 1:876b1317060d foo "x2"