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changing-files: rework the way we store changed files in side-data...
changing-files: rework the way we store changed files in side-data We need to store new data so this is a good opportunity to rework this fully. 1) We directly store the list of affected file in the side data: * This avoid having to fetch and parse the `files` list in the revision in addition to the sidedata. Making the data more self sufficient. * This work around situation where that `files` field contains wrong information, and open the way to other bug fixing (eg: issue6219) * The format (fixed initial index, sorted files) allow for fast lookup of filename within the structure. * This unify the storage of affected files and copies sources and destination, limiting the number filename stored redundantly. * This prepare for the fact we should drop the `files` as soon as we do any change affecting the revision schema. * This rely on compression to avoid a significant increase of the changelog.d. More testing on this will be done before we freeze the final format. 2) We can store additional data: * The new "merged" field, * A future "salvaged" set recording files that might have been deleted but have were still present in the final result. Differential Revision: https://phab.mercurial-scm.org/D9090
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test-copies-in-changeset.t
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#testcases extra sidedata
#if extra
$ cat >> $HGRCPATH << EOF
> [experimental]
> copies.write-to=changeset-only
> copies.read-from=changeset-only
> [alias]
> changesetcopies = log -r . -T 'files: {files}
> {extras % "{ifcontains("files", key, "{key}: {value}\n")}"}
> {extras % "{ifcontains("copies", key, "{key}: {value}\n")}"}'
> EOF
#endif
#if sidedata
$ cat >> $HGRCPATH << EOF
> [format]
> exp-use-copies-side-data-changeset = yes
> EOF
#endif
$ cat >> $HGRCPATH << EOF
> [alias]
> showcopies = log -r . -T '{file_copies % "{source} -> {name}\n"}'
> [extensions]
> rebase =
> split =
> EOF
Check that copies are recorded correctly
$ hg init repo
$ cd repo
#if sidedata
$ hg debugformat -v
format-variant repo config default
fncache: yes yes yes
dotencode: yes yes yes
generaldelta: yes yes yes
sparserevlog: yes yes yes
sidedata: yes yes no
persistent-nodemap: no no no
copies-sdc: yes yes no
plain-cl-delta: yes yes yes
compression: zlib zlib zlib
compression-level: default default default
#else
$ hg debugformat -v
format-variant repo config default
fncache: yes yes yes
dotencode: yes yes yes
generaldelta: yes yes yes
sparserevlog: yes yes yes
sidedata: no no no
persistent-nodemap: no no no
copies-sdc: no no no
plain-cl-delta: yes yes yes
compression: zlib zlib zlib
compression-level: default default default
#endif
$ echo a > a
$ hg add a
$ hg ci -m initial
$ hg cp a b
$ hg cp a c
$ hg cp a d
$ hg ci -m 'copy a to b, c, and d'
#if extra
$ hg changesetcopies
files: b c d
filesadded: 0
1
2
p1copies: 0\x00a (esc)
1\x00a (esc)
2\x00a (esc)
#else
$ hg debugsidedata -c -v -- -1
1 sidedata entries
entry-0014 size 44
'\x00\x00\x00\x04\x00\x00\x00\x00\x01\x00\x00\x00\x00\x06\x00\x00\x00\x02\x00\x00\x00\x00\x06\x00\x00\x00\x03\x00\x00\x00\x00\x06\x00\x00\x00\x04\x00\x00\x00\x00abcd'
#endif
$ hg showcopies
a -> b
a -> c
a -> d
#if extra
$ hg showcopies --config experimental.copies.read-from=compatibility
a -> b
a -> c
a -> d
$ hg showcopies --config experimental.copies.read-from=filelog-only
#endif
Check that renames are recorded correctly
$ hg mv b b2
$ hg ci -m 'rename b to b2'
#if extra
$ hg changesetcopies
files: b b2
filesadded: 1
filesremoved: 0
p1copies: 1\x00b (esc)
#else
$ hg debugsidedata -c -v -- -1
1 sidedata entries
entry-0014 size 25
'\x00\x00\x00\x02\x0c\x00\x00\x00\x01\x00\x00\x00\x00\x06\x00\x00\x00\x03\x00\x00\x00\x00bb2'
#endif
$ hg showcopies
b -> b2
Rename onto existing file. This should get recorded in the changeset files list and in the extras,
even though there is no filelog entry.
$ hg cp b2 c --force
$ hg st --copies
M c
b2
#if extra
$ hg debugindex c
rev linkrev nodeid p1 p2
0 1 b789fdd96dc2 000000000000 000000000000
#else
$ hg debugindex c
rev linkrev nodeid p1 p2
0 1 37d9b5d994ea 000000000000 000000000000
#endif
$ hg ci -m 'move b onto d'
#if extra
$ hg changesetcopies
files: c
p1copies: 0\x00b2 (esc)
#else
$ hg debugsidedata -c -v -- -1
1 sidedata entries
entry-0014 size 25
'\x00\x00\x00\x02\x00\x00\x00\x00\x02\x00\x00\x00\x00\x16\x00\x00\x00\x03\x00\x00\x00\x00b2c'
#endif
$ hg showcopies
b2 -> c
#if extra
$ hg debugindex c
rev linkrev nodeid p1 p2
0 1 b789fdd96dc2 000000000000 000000000000
#else
$ hg debugindex c
rev linkrev nodeid p1 p2
0 1 37d9b5d994ea 000000000000 000000000000
1 3 029625640347 000000000000 000000000000
#endif
Create a merge commit with copying done during merge.
$ hg co 0
0 files updated, 0 files merged, 3 files removed, 0 files unresolved
$ hg cp a e
$ hg cp a f
$ hg ci -m 'copy a to e and f'
created new head
$ hg merge 3
3 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
File 'a' exists on both sides, so 'g' could be recorded as being from p1 or p2, but we currently
always record it as being from p1
$ hg cp a g
File 'd' exists only in p2, so 'h' should be from p2
$ hg cp d h
File 'f' exists only in p1, so 'i' should be from p1
$ hg cp f i
$ hg ci -m 'merge'
#if extra
$ hg changesetcopies
files: g h i
filesadded: 0
1
2
p1copies: 0\x00a (esc)
2\x00f (esc)
p2copies: 1\x00d (esc)
#else
$ hg debugsidedata -c -v -- -1
1 sidedata entries
entry-0014 size 64
'\x00\x00\x00\x06\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x00\x03\x00\x00\x00\x00\x06\x00\x00\x00\x04\x00\x00\x00\x00\x07\x00\x00\x00\x05\x00\x00\x00\x01\x06\x00\x00\x00\x06\x00\x00\x00\x02adfghi'
#endif
$ hg showcopies
a -> g
d -> h
f -> i
Test writing to both changeset and filelog
$ hg cp a j
#if extra
$ hg ci -m 'copy a to j' --config experimental.copies.write-to=compatibility
$ hg changesetcopies
files: j
filesadded: 0
filesremoved:
p1copies: 0\x00a (esc)
p2copies:
#else
$ hg ci -m 'copy a to j'
$ hg debugsidedata -c -v -- -1
1 sidedata entries
entry-0014 size 24
'\x00\x00\x00\x02\x00\x00\x00\x00\x01\x00\x00\x00\x00\x06\x00\x00\x00\x02\x00\x00\x00\x00aj'
#endif
$ hg debugdata j 0
\x01 (esc)
copy: a
copyrev: b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3
\x01 (esc)
a
$ hg showcopies
a -> j
$ hg showcopies --config experimental.copies.read-from=compatibility
a -> j
$ hg showcopies --config experimental.copies.read-from=filelog-only
a -> j
Existing copy information in the changeset gets removed on amend and writing
copy information on to the filelog
#if extra
$ hg ci --amend -m 'copy a to j, v2' \
> --config experimental.copies.write-to=filelog-only
saved backup bundle to $TESTTMP/repo/.hg/strip-backup/*-*-amend.hg (glob)
$ hg changesetcopies
files: j
#else
$ hg ci --amend -m 'copy a to j, v2'
saved backup bundle to $TESTTMP/repo/.hg/strip-backup/*-*-amend.hg (glob)
$ hg debugsidedata -c -v -- -1
1 sidedata entries
entry-0014 size 24
'\x00\x00\x00\x02\x00\x00\x00\x00\x01\x00\x00\x00\x00\x06\x00\x00\x00\x02\x00\x00\x00\x00aj'
#endif
$ hg showcopies --config experimental.copies.read-from=filelog-only
a -> j
The entries should be written to extras even if they're empty (so the client
won't have to fall back to reading from filelogs)
$ echo x >> j
#if extra
$ hg ci -m 'modify j' --config experimental.copies.write-to=compatibility
$ hg changesetcopies
files: j
filesadded:
filesremoved:
p1copies:
p2copies:
#else
$ hg ci -m 'modify j'
$ hg debugsidedata -c -v -- -1
1 sidedata entries
entry-0014 size 14
'\x00\x00\x00\x01\x14\x00\x00\x00\x01\x00\x00\x00\x00j'
#endif
Test writing only to filelog
$ hg cp a k
#if extra
$ hg ci -m 'copy a to k' --config experimental.copies.write-to=filelog-only
$ hg changesetcopies
files: k
#else
$ hg ci -m 'copy a to k'
$ hg debugsidedata -c -v -- -1
1 sidedata entries
entry-0014 size 24
'\x00\x00\x00\x02\x00\x00\x00\x00\x01\x00\x00\x00\x00\x06\x00\x00\x00\x02\x00\x00\x00\x00ak'
#endif
$ hg debugdata k 0
\x01 (esc)
copy: a
copyrev: b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3
\x01 (esc)
a
#if extra
$ hg showcopies
$ hg showcopies --config experimental.copies.read-from=compatibility
a -> k
$ hg showcopies --config experimental.copies.read-from=filelog-only
a -> k
#else
$ hg showcopies
a -> k
#endif
$ cd ..
Test rebasing a commit with copy information
$ hg init rebase-rename
$ cd rebase-rename
$ echo a > a
$ hg ci -Aqm 'add a'
$ echo a2 > a
$ hg ci -m 'modify a'
$ hg co -q 0
$ hg mv a b
$ hg ci -qm 'rename a to b'
$ hg rebase -d 1 --config rebase.experimental.inmemory=yes
rebasing 2:* "rename a to b" (tip) (glob)
merging a and b to b
saved backup bundle to $TESTTMP/rebase-rename/.hg/strip-backup/*-*-rebase.hg (glob)
$ hg st --change . --copies
A b
a
R a
$ cd ..
Test splitting a commit
$ hg init split
$ cd split
$ echo a > a
$ echo b > b
$ hg ci -Aqm 'add a and b'
$ echo a2 > a
$ hg mv b c
$ hg ci -m 'modify a, move b to c'
$ hg --config ui.interactive=yes split <<EOF
> y
> y
> n
> y
> EOF
diff --git a/a b/a
1 hunks, 1 lines changed
examine changes to 'a'?
(enter ? for help) [Ynesfdaq?] y
@@ -1,1 +1,1 @@
-a
+a2
record this change to 'a'?
(enter ? for help) [Ynesfdaq?] y
diff --git a/b b/c
rename from b
rename to c
examine changes to 'b' and 'c'?
(enter ? for help) [Ynesfdaq?] n
created new head
diff --git a/b b/c
rename from b
rename to c
examine changes to 'b' and 'c'?
(enter ? for help) [Ynesfdaq?] y
saved backup bundle to $TESTTMP/split/.hg/strip-backup/*-*-split.hg (glob)
$ cd ..
Test committing half a rename
$ hg init partial
$ cd partial
$ echo a > a
$ hg ci -Aqm 'add a'
$ hg mv a b
$ hg ci -m 'remove a' a
#if sidedata
Test upgrading/downgrading to sidedata storage
==============================================
downgrading (keeping some sidedata)
$ hg debugformat -v
format-variant repo config default
fncache: yes yes yes
dotencode: yes yes yes
generaldelta: yes yes yes
sparserevlog: yes yes yes
sidedata: yes yes no
persistent-nodemap: no no no
copies-sdc: yes yes no
plain-cl-delta: yes yes yes
compression: zlib zlib zlib
compression-level: default default default
$ hg debugsidedata -c -- 0
1 sidedata entries
entry-0014 size 14
$ hg debugsidedata -c -- 1
1 sidedata entries
entry-0014 size 14
$ hg debugsidedata -m -- 0
$ cat << EOF > .hg/hgrc
> [format]
> exp-use-side-data = yes
> exp-use-copies-side-data-changeset = no
> EOF
$ hg debugupgraderepo --run --quiet --no-backup > /dev/null
$ hg debugformat -v
format-variant repo config default
fncache: yes yes yes
dotencode: yes yes yes
generaldelta: yes yes yes
sparserevlog: yes yes yes
sidedata: yes yes no
persistent-nodemap: no no no
copies-sdc: no no no
plain-cl-delta: yes yes yes
compression: zlib zlib zlib
compression-level: default default default
$ hg debugsidedata -c -- 0
1 sidedata entries
entry-0014 size 14
$ hg debugsidedata -c -- 1
1 sidedata entries
entry-0014 size 14
$ hg debugsidedata -m -- 0
upgrading
$ cat << EOF > .hg/hgrc
> [format]
> exp-use-copies-side-data-changeset = yes
> EOF
$ hg debugupgraderepo --run --quiet --no-backup > /dev/null
$ hg debugformat -v
format-variant repo config default
fncache: yes yes yes
dotencode: yes yes yes
generaldelta: yes yes yes
sparserevlog: yes yes yes
sidedata: yes yes no
persistent-nodemap: no no no
copies-sdc: yes yes no
plain-cl-delta: yes yes yes
compression: zlib zlib zlib
compression-level: default default default
$ hg debugsidedata -c -- 0
1 sidedata entries
entry-0014 size 14
$ hg debugsidedata -c -- 1
1 sidedata entries
entry-0014 size 14
$ hg debugsidedata -m -- 0
#endif
$ cd ..