|
|
==========================================================
|
|
|
Test various things around delta computation within revlog
|
|
|
==========================================================
|
|
|
|
|
|
|
|
|
basic setup
|
|
|
-----------
|
|
|
|
|
|
$ cat << EOF >> $HGRCPATH
|
|
|
> [debug]
|
|
|
> revlog.debug-delta=yes
|
|
|
> EOF
|
|
|
$ cat << EOF >> sha256line.py
|
|
|
> # a way to quickly produce file of significant size and poorly compressable content.
|
|
|
> import hashlib
|
|
|
> import sys
|
|
|
> for line in sys.stdin:
|
|
|
> print(hashlib.sha256(line.encode('utf8')).hexdigest())
|
|
|
> EOF
|
|
|
|
|
|
$ hg init base-repo
|
|
|
$ cd base-repo
|
|
|
|
|
|
create a "large" file
|
|
|
|
|
|
$ $TESTDIR/seq.py 1000 | $PYTHON $TESTTMP/sha256line.py > my-file.txt
|
|
|
$ hg add my-file.txt
|
|
|
$ hg commit -m initial-commit
|
|
|
DBG-DELTAS: FILELOG:my-file.txt: rev=0: delta-base=0 * (glob)
|
|
|
DBG-DELTAS: MANIFESTLOG: * (glob)
|
|
|
DBG-DELTAS: CHANGELOG: * (glob)
|
|
|
|
|
|
Add more change at the end of the file
|
|
|
|
|
|
$ $TESTDIR/seq.py 1001 1200 | $PYTHON $TESTTMP/sha256line.py >> my-file.txt
|
|
|
$ hg commit -m "large-change"
|
|
|
DBG-DELTAS: FILELOG:my-file.txt: rev=1: delta-base=0 * (glob)
|
|
|
DBG-DELTAS: MANIFESTLOG: * (glob)
|
|
|
DBG-DELTAS: CHANGELOG: * (glob)
|
|
|
|
|
|
Add small change at the start
|
|
|
|
|
|
$ hg up 'desc("initial-commit")' --quiet
|
|
|
$ mv my-file.txt foo
|
|
|
$ echo "small change at the start" > my-file.txt
|
|
|
$ cat foo >> my-file.txt
|
|
|
$ rm foo
|
|
|
$ hg commit -m "small-change"
|
|
|
DBG-DELTAS: FILELOG:my-file.txt: rev=2: delta-base=0 * (glob)
|
|
|
DBG-DELTAS: MANIFESTLOG: * (glob)
|
|
|
DBG-DELTAS: CHANGELOG: * (glob)
|
|
|
created new head
|
|
|
|
|
|
|
|
|
$ hg log -r 'head()' -T '{node}\n' >> ../base-heads.nodes
|
|
|
$ hg log -r 'desc("initial-commit")' -T '{node}\n' >> ../initial.node
|
|
|
$ hg log -r 'desc("small-change")' -T '{node}\n' >> ../small.node
|
|
|
$ hg log -r 'desc("large-change")' -T '{node}\n' >> ../large.node
|
|
|
$ cd ..
|
|
|
|
|
|
Check delta find policy and result for merge on commit
|
|
|
======================================================
|
|
|
|
|
|
Check that delta of merge pick best of the two parents
|
|
|
------------------------------------------------------
|
|
|
|
|
|
As we check against both parents, the one with the largest change should
|
|
|
produce the smallest delta and be picked.
|
|
|
|
|
|
$ hg clone base-repo test-parents --quiet
|
|
|
$ hg -R test-parents update 'nodefromfile("small.node")' --quiet
|
|
|
$ hg -R test-parents merge 'nodefromfile("large.node")' --quiet
|
|
|
|
|
|
The delta base is the "large" revision as it produce a smaller delta.
|
|
|
|
|
|
$ hg -R test-parents commit -m "merge from small change"
|
|
|
DBG-DELTAS: FILELOG:my-file.txt: rev=3: delta-base=1 * (glob)
|
|
|
DBG-DELTAS: MANIFESTLOG: * (glob)
|
|
|
DBG-DELTAS: CHANGELOG: * (glob)
|
|
|
|
|
|
Check that the behavior tested above can we disabled
|
|
|
----------------------------------------------------
|
|
|
|
|
|
We disable the checking of both parent at the same time. The `small` change,
|
|
|
that produce a less optimal delta, should be picked first as it is "closer" to
|
|
|
the new commit.
|
|
|
|
|
|
$ hg clone base-repo test-no-parents --quiet
|
|
|
$ hg -R test-no-parents update 'nodefromfile("small.node")' --quiet
|
|
|
$ hg -R test-no-parents merge 'nodefromfile("large.node")' --quiet
|
|
|
|
|
|
The delta base is the "large" revision as it produce a smaller delta.
|
|
|
|
|
|
$ hg -R test-no-parents commit -m "merge from small change" \
|
|
|
> --config storage.revlog.optimize-delta-parent-choice=no
|
|
|
DBG-DELTAS: FILELOG:my-file.txt: rev=3: delta-base=2 * (glob)
|
|
|
DBG-DELTAS: MANIFESTLOG: * (glob)
|
|
|
DBG-DELTAS: CHANGELOG: * (glob)
|
|
|
|
|
|
|
|
|
Check delta-find policy and result when unbundling
|
|
|
==================================================
|
|
|
|
|
|
Build a bundle with all delta built against p1
|
|
|
|
|
|
$ hg bundle -R test-parents --all --config devel.bundle.delta=p1 all-p1.hg
|
|
|
4 changesets found
|
|
|
|
|
|
Default policy of trusting delta from the bundle
|
|
|
------------------------------------------------
|
|
|
|
|
|
Keeping the `p1` delta used in the bundle is sub-optimal for storage, but
|
|
|
strusting in-bundle delta is faster to apply.
|
|
|
|
|
|
$ hg init bundle-default
|
|
|
$ hg -R bundle-default unbundle all-p1.hg --quiet
|
|
|
DBG-DELTAS: CHANGELOG: * (glob)
|
|
|
DBG-DELTAS: CHANGELOG: * (glob)
|
|
|
DBG-DELTAS: CHANGELOG: * (glob)
|
|
|
DBG-DELTAS: CHANGELOG: * (glob)
|
|
|
DBG-DELTAS: MANIFESTLOG: * (glob)
|
|
|
DBG-DELTAS: MANIFESTLOG: * (glob)
|
|
|
DBG-DELTAS: MANIFESTLOG: * (glob)
|
|
|
DBG-DELTAS: MANIFESTLOG: * (glob)
|
|
|
DBG-DELTAS: FILELOG:my-file.txt: rev=0: delta-base=0 * (glob)
|
|
|
DBG-DELTAS: FILELOG:my-file.txt: rev=1: delta-base=0 * (glob)
|
|
|
DBG-DELTAS: FILELOG:my-file.txt: rev=2: delta-base=0 * (glob)
|
|
|
DBG-DELTAS: FILELOG:my-file.txt: rev=3: delta-base=2 * (glob)
|
|
|
|
|
|
(confirm the file revision are in the same order, 2 should be smaller than 1)
|
|
|
|
|
|
$ hg -R bundle-default debugdata my-file.txt 2 | wc -l
|
|
|
\s*1001 (re)
|
|
|
$ hg -R bundle-default debugdata my-file.txt 1 | wc -l
|
|
|
\s*1200 (re)
|
|
|
|
|
|
explicitly enabled
|
|
|
------------------
|
|
|
|
|
|
Keeping the `p1` delta used in the bundle is sub-optimal for storage, but
|
|
|
strusting in-bundle delta is faster to apply.
|
|
|
|
|
|
$ hg init bundle-reuse-enabled
|
|
|
$ hg -R bundle-reuse-enabled unbundle all-p1.hg --quiet \
|
|
|
> --config storage.revlog.reuse-external-delta-parent=yes
|
|
|
DBG-DELTAS: CHANGELOG: * (glob)
|
|
|
DBG-DELTAS: CHANGELOG: * (glob)
|
|
|
DBG-DELTAS: CHANGELOG: * (glob)
|
|
|
DBG-DELTAS: CHANGELOG: * (glob)
|
|
|
DBG-DELTAS: MANIFESTLOG: * (glob)
|
|
|
DBG-DELTAS: MANIFESTLOG: * (glob)
|
|
|
DBG-DELTAS: MANIFESTLOG: * (glob)
|
|
|
DBG-DELTAS: MANIFESTLOG: * (glob)
|
|
|
DBG-DELTAS: FILELOG:my-file.txt: rev=0: delta-base=0 * (glob)
|
|
|
DBG-DELTAS: FILELOG:my-file.txt: rev=1: delta-base=0 * (glob)
|
|
|
DBG-DELTAS: FILELOG:my-file.txt: rev=2: delta-base=0 * (glob)
|
|
|
DBG-DELTAS: FILELOG:my-file.txt: rev=3: delta-base=2 * (glob)
|
|
|
|
|
|
(confirm the file revision are in the same order, 2 should be smaller than 1)
|
|
|
|
|
|
$ hg -R bundle-reuse-enabled debugdata my-file.txt 2 | wc -l
|
|
|
\s*1001 (re)
|
|
|
$ hg -R bundle-reuse-enabled debugdata my-file.txt 1 | wc -l
|
|
|
\s*1200 (re)
|
|
|
|
|
|
explicitly disabled
|
|
|
-------------------
|
|
|
|
|
|
Not reusing the delta-base from the parent means we the delta will be made
|
|
|
against the "best" parent. (so not the same as the previous two)
|
|
|
|
|
|
$ hg init bundle-reuse-disabled
|
|
|
$ hg -R bundle-reuse-disabled unbundle all-p1.hg --quiet \
|
|
|
> --config storage.revlog.reuse-external-delta-parent=no
|
|
|
DBG-DELTAS: CHANGELOG: * (glob)
|
|
|
DBG-DELTAS: CHANGELOG: * (glob)
|
|
|
DBG-DELTAS: CHANGELOG: * (glob)
|
|
|
DBG-DELTAS: CHANGELOG: * (glob)
|
|
|
DBG-DELTAS: MANIFESTLOG: * (glob)
|
|
|
DBG-DELTAS: MANIFESTLOG: * (glob)
|
|
|
DBG-DELTAS: MANIFESTLOG: * (glob)
|
|
|
DBG-DELTAS: MANIFESTLOG: * (glob)
|
|
|
DBG-DELTAS: FILELOG:my-file.txt: rev=0: delta-base=0 * (glob)
|
|
|
DBG-DELTAS: FILELOG:my-file.txt: rev=1: delta-base=0 * (glob)
|
|
|
DBG-DELTAS: FILELOG:my-file.txt: rev=2: delta-base=0 * (glob)
|
|
|
DBG-DELTAS: FILELOG:my-file.txt: rev=3: delta-base=1 * (glob)
|
|
|
|
|
|
(confirm the file revision are in the same order, 2 should be smaller than 1)
|
|
|
|
|
|
$ hg -R bundle-reuse-disabled debugdata my-file.txt 2 | wc -l
|
|
|
\s*1001 (re)
|
|
|
$ hg -R bundle-reuse-disabled debugdata my-file.txt 1 | wc -l
|
|
|
\s*1200 (re)
|
|
|
|
