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view tests/test-diffstat.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.
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Sat, 01 Jul 2017 10:43:29 -0700 |
parents | 0e29ce16ec38 |
children | 4441705b7111 058c725925e3 |
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$ hg init repo $ cd repo $ i=0; while [ "$i" -lt 213 ]; do echo a >> a; i=`expr $i + 1`; done $ hg add a $ cp a b $ hg add b Wide diffstat: $ hg diff --stat a | 213 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ b | 213 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 426 insertions(+), 0 deletions(-) diffstat width: $ COLUMNS=24 hg diff --config ui.interactive=true --stat a | 213 ++++++++++++++ b | 213 ++++++++++++++ 2 files changed, 426 insertions(+), 0 deletions(-) $ hg ci -m adda $ cat >> a <<EOF > a > a > a > EOF Narrow diffstat: $ hg diff --stat a | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) $ hg ci -m appenda >>> open("c", "wb").write("\0") $ touch d $ hg add c d Binary diffstat: $ hg diff --stat c | Bin 1 files changed, 0 insertions(+), 0 deletions(-) Binary git diffstat: $ hg diff --stat --git c | Bin d | 0 2 files changed, 0 insertions(+), 0 deletions(-) $ hg ci -m createb >>> open("file with spaces", "wb").write("\0") $ hg add "file with spaces" Filename with spaces diffstat: $ hg diff --stat file with spaces | Bin 1 files changed, 0 insertions(+), 0 deletions(-) Filename with spaces git diffstat: $ hg diff --stat --git file with spaces | Bin 1 files changed, 0 insertions(+), 0 deletions(-) diffstat within directories: $ hg rm -f 'file with spaces' $ mkdir dir1 dir2 $ echo new1 > dir1/new $ echo new2 > dir2/new $ hg add dir1/new dir2/new $ hg diff --stat dir1/new | 1 + dir2/new | 1 + 2 files changed, 2 insertions(+), 0 deletions(-) $ hg diff --stat --root dir1 new | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) $ hg diff --stat --root dir1 dir2 warning: dir2 not inside relative root dir1 $ hg diff --stat --root dir1 -I dir1/old $ cd dir1 $ hg diff --stat . dir1/new | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) $ hg diff --stat --root . new | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) $ hg diff --stat --root ../dir1 ../dir2 warning: ../dir2 not inside relative root . (glob) $ hg diff --stat --root . -I old $ cd .. Files with lines beginning with '--' or '++' should be properly counted in diffstat $ hg up -Cr tip 0 files updated, 0 files merged, 0 files removed, 0 files unresolved $ rm dir1/new $ rm dir2/new $ rm "file with spaces" $ cat > file << EOF > line 1 > line 2 > line 3 > EOF $ hg commit -Am file adding file Lines added starting with '--' should count as additions $ cat > file << EOF > line 1 > -- line 2, with dashes > line 3 > EOF $ hg diff --root . diff -r be1569354b24 file --- a/file Thu Jan 01 00:00:00 1970 +0000 +++ b/file * (glob) @@ -1,3 +1,3 @@ line 1 -line 2 +-- line 2, with dashes line 3 $ hg diff --root . --stat file | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) Lines changed starting with '--' should count as deletions $ hg commit -m filev2 $ cat > file << EOF > line 1 > -- line 2, with dashes, changed again > line 3 > EOF $ hg diff --root . diff -r 160f7c034df6 file --- a/file Thu Jan 01 00:00:00 1970 +0000 +++ b/file * (glob) @@ -1,3 +1,3 @@ line 1 --- line 2, with dashes +-- line 2, with dashes, changed again line 3 $ hg diff --root . --stat file | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) Lines changed starting with '--' should count as deletions and starting with '++' should count as additions $ cat > file << EOF > line 1 > ++ line 2, switched dashes to plusses > line 3 > EOF $ hg diff --root . diff -r 160f7c034df6 file --- a/file Thu Jan 01 00:00:00 1970 +0000 +++ b/file * (glob) @@ -1,3 +1,3 @@ line 1 --- line 2, with dashes +++ line 2, switched dashes to plusses line 3 $ hg diff --root . --stat file | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)