view tests/test-sparse-profiles.t @ 41247:a89b20a49c13

rust-cpython: using MissingAncestors from Python code

As precedently done with LazyAncestors on cpython.rs, we test for the
presence of the 'rustext' module.

incrementalmissingrevs() has two callers within the Mercurial core:
`setdiscovery.partialdiscovery` and the `only()` revset.

This move shows a significant discovery performance improvement
in cases where the baseline is slow: using perfdiscovery on the PyPy
repos, prepared with `contrib/discovery-helper <repo> 50 100`, we
get averaged medians of 403ms with the Rust version vs 742ms without
(about 45% better).

But there are still indications that performance can be worse in cases
the baseline is fast, possibly due to the conversion from Python to
Rust and back becoming the bottleneck. We could measure this on
mozilla-central in cases were the delta is just a few changesets.
This requires confirmation, but if that's the reason, then an
upcoming `partialdiscovery` fully in Rust should solve the problem.

Differential Revision: https://phab.mercurial-scm.org/D5551

test sparse

  $ hg init myrepo
  $ cd myrepo
  $ cat > .hg/hgrc <<EOF
  > [extensions]
  > sparse=
  > purge=
  > strip=
  > rebase=
  > EOF

Config file without [section] is rejected

  $ cat > bad.sparse <<EOF
  > *.html
  > EOF

  $ hg debugsparse --import-rules bad.sparse
  abort: sparse config entry outside of section: *.html
  (add an [include] or [exclude] line to declare the entry type)
  [255]
  $ rm bad.sparse

  $ echo a > index.html
  $ echo x > data.py
  $ echo z > readme.txt
  $ cat > webpage.sparse <<EOF
  > # frontend sparse profile
  > [include]
  > *.html
  > EOF
  $ cat > backend.sparse <<EOF
  > # backend sparse profile
  > [include]
  > *.py
  > EOF
  $ hg ci -Aqm 'initial'

  $ hg debugsparse --include '*.sparse'

Verify enabling a single profile works

  $ hg debugsparse --enable-profile webpage.sparse
  $ ls
  backend.sparse
  index.html
  webpage.sparse

Verify enabling two profiles works

  $ hg debugsparse --enable-profile backend.sparse
  $ ls
  backend.sparse
  data.py
  index.html
  webpage.sparse

Verify disabling a profile works

  $ hg debugsparse --disable-profile webpage.sparse
  $ ls
  backend.sparse
  data.py
  webpage.sparse

Verify that a profile is updated across multiple commits

  $ cat > webpage.sparse <<EOF
  > # frontend sparse profile
  > [include]
  > *.html
  > EOF
  $ cat > backend.sparse <<EOF
  > # backend sparse profile
  > [include]
  > *.py
  > *.txt
  > EOF

  $ echo foo >> data.py

  $ hg ci -m 'edit profile'
  $ ls
  backend.sparse
  data.py
  readme.txt
  webpage.sparse

  $ hg up -q 0
  $ ls
  backend.sparse
  data.py
  webpage.sparse

  $ hg up -q 1
  $ ls
  backend.sparse
  data.py
  readme.txt
  webpage.sparse

Introduce a conflicting .hgsparse change

  $ hg up -q 0
  $ cat > backend.sparse <<EOF
  > # Different backend sparse profile
  > [include]
  > *.html
  > EOF
  $ echo bar >> data.py

  $ hg ci -qAm "edit profile other"
  $ ls
  backend.sparse
  index.html
  webpage.sparse

Verify conflicting merge pulls in the conflicting changes

  $ hg merge 1
  temporarily included 2 file(s) in the sparse checkout for merging
  merging backend.sparse
  merging data.py
  warning: conflicts while merging backend.sparse! (edit, then use 'hg resolve --mark')
  warning: conflicts while merging data.py! (edit, then use 'hg resolve --mark')
  0 files updated, 0 files merged, 0 files removed, 2 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]

  $ rm *.orig
  $ ls
  backend.sparse
  data.py
  index.html
  webpage.sparse

Verify resolving the merge removes the temporarily unioned files

  $ cat > backend.sparse <<EOF
  > # backend sparse profile
  > [include]
  > *.html
  > *.txt
  > EOF
  $ hg resolve -m backend.sparse

  $ cat > data.py <<EOF
  > x
  > foo
  > bar
  > EOF
  $ hg resolve -m data.py
  (no more unresolved files)

  $ hg ci -qAm "merge profiles"
  $ ls
  backend.sparse
  index.html
  readme.txt
  webpage.sparse

  $ hg cat -r . data.py
  x
  foo
  bar

Verify stripping refreshes dirstate

  $ hg strip -q -r .
  $ ls
  backend.sparse
  index.html
  webpage.sparse

Verify rebase conflicts pulls in the conflicting changes

  $ hg up -q 1
  $ ls
  backend.sparse
  data.py
  readme.txt
  webpage.sparse

  $ hg rebase -d 2
  rebasing 1:a2b1de640a62 "edit profile"
  temporarily included 2 file(s) in the sparse checkout for merging
  merging backend.sparse
  merging data.py
  warning: conflicts while merging backend.sparse! (edit, then use 'hg resolve --mark')
  warning: conflicts while merging data.py! (edit, then use 'hg resolve --mark')
  unresolved conflicts (see hg resolve, then hg rebase --continue)
  [1]
  $ rm *.orig
  $ ls
  backend.sparse
  data.py
  index.html
  webpage.sparse

Verify resolving conflict removes the temporary files

  $ cat > backend.sparse <<EOF
  > [include]
  > *.html
  > *.txt
  > EOF
  $ hg resolve -m backend.sparse

  $ cat > data.py <<EOF
  > x
  > foo
  > bar
  > EOF
  $ hg resolve -m data.py
  (no more unresolved files)
  continue: hg rebase --continue

  $ hg rebase -q --continue
  $ ls
  backend.sparse
  index.html
  readme.txt
  webpage.sparse

  $ hg cat -r . data.py
  x
  foo
  bar

Test checking out a commit that does not contain the sparse profile. The
warning message can be suppressed by setting missingwarning = false in
[sparse] section of your config:

  $ hg debugsparse --reset
  $ hg rm *.sparse
  $ hg commit -m "delete profiles"
  $ hg up -q ".^"
  $ hg debugsparse --enable-profile backend.sparse
  $ ls
  index.html
  readme.txt
  $ hg up tip | grep warning
  warning: sparse profile 'backend.sparse' not found in rev bfcb76de99cc - ignoring it
  [1]
  $ ls
  data.py
  index.html
  readme.txt
  $ hg debugsparse --disable-profile backend.sparse | grep warning
  warning: sparse profile 'backend.sparse' not found in rev bfcb76de99cc - ignoring it
  [1]
  $ cat >> .hg/hgrc <<EOF
  > [sparse]
  > missingwarning = false
  > EOF
  $ hg debugsparse --enable-profile backend.sparse

  $ cd ..

#if unix-permissions

Test file permissions changing across a sparse profile change
  $ hg init sparseperm
  $ cd sparseperm
  $ cat > .hg/hgrc <<EOF
  > [extensions]
  > sparse=
  > EOF
  $ touch a b
  $ cat > .hgsparse <<EOF
  > [include]
  > a
  > EOF
  $ hg commit -Aqm 'initial'
  $ chmod a+x b
  $ hg commit -qm 'make executable'
  $ cat >> .hgsparse <<EOF
  > b
  > EOF
  $ hg commit -qm 'update profile'
  $ hg up -q 0
  $ hg debugsparse --enable-profile .hgsparse
  $ hg up -q 2
  $ ls -l b
  -rwxr-xr-x* b (glob)

#endif