Mercurial > hg
view tests/test-diffstat.t @ 40393:229d23cdb203
exchangev2: support fetching shallow files history
This commit teaches the exchangev2 client code to handle fetching shallow
files data.
Only shallow fetching of files data is supported: shallow fetching of
changeset and manifest data is explicitly not yet supported.
Previously, we would fetch file revisions for changesets that were received
by the current pull operation. In the new model, we calculate the set of
"relevant" changesets given the pull depth and only fetch files data for
those changesets.
We also teach the "filesdata" command invocation to vary parameters as needed.
The implementation here is far from complete or optimal. Subsequent pulls will
end up re-fetching a lot of files data. But the application of this data should
mostly be a no-op on the client, so it isn't a big deal.
Depending on the order file revisions are fetched in, revisions could get
inserted with the wrong revision number relationships. I think the best way
to deal with this is to remove revision numbers from storage and to either
dynamically derive them (by reconstructing a DAG from nodes/parents) or remove
revision numbers from the file storage interface completely.
A missing API that we'll likely want to write pretty soon is "ensure files
for revision(s) are present." We can kind of cajole exchangev2.pull() to do
this. But it isn't very efficient. For example, in simple cases like
widening the store to obtain data for a single revision, it is probably
more efficient to walk the manifest and find exactly which file revisions
are missing and to make explicit requests for just their data. In more
advanced cases, asking the server for all files data may be more efficient,
even though it requires sending data the client already has. There is tons
of room for future experimentation here. And TBH I'm not sure what the
final state will be.
Anyway, this commit gets us pretty close to being able to have shallow
and narrow checkouts with exchangev2/sqlite storage. Close enough that a
minimal extension should be able to provide fill in the gaps until the code
in core stabilizes and there is a user-facing way to trigger the
narrow/shallow bits from `hg clone` without also implying using of the
narrow extension...
Differential Revision: https://phab.mercurial-scm.org/D5169
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Fri, 19 Oct 2018 12:30:49 +0200 |
parents | 87c4253bebdb |
children | f1b0d9988825 |
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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(b"\0") and None $ 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(b"\0") and None $ 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(-) Filename without "a/" or "b/" (issue5759): $ hg diff --config 'diff.noprefix=1' -c1 --stat --git a | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) $ hg diff --config 'diff.noprefix=1' -c2 --stat --git c | Bin d | 0 2 files changed, 0 insertions(+), 0 deletions(-) $ hg log --config 'diff.noprefix=1' -r '1:' -p --stat --git changeset: 1:3a95b07bb77f user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: appenda a | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a a --- a +++ a @@ -211,3 +211,6 @@ a a a +a +a +a changeset: 2:c60a6c753773 tag: tip user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: createb c | Bin d | 0 2 files changed, 0 insertions(+), 0 deletions(-) diff --git c c new file mode 100644 index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..f76dd238ade08917e6712764a16a22005a50573d GIT binary patch literal 1 Ic${MZ000310RR91 diff --git d d new file mode 100644 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 . $ 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(-)