copies: add config option for writing copy metadata to file and/or changset
This introduces a config option that lets you choose to write copy
metadata to the changeset extras instead of to filelog. There's also
an option to write it to both places. I imagine that may possibly be
useful when transitioning an existing repo.
The copy metadata is stored as two fields in extras: one for copies
since p1 and one for copies since p2.
I may need to add more information later in order to make copy tracing
faster. Specifically, I'm thinking out recording which files were
added or removed so that copies._chaincopies() doesn't have to look at
the manifest for that. But that would just be an optimization and that
can be added once we know if it's necessary.
I have also considered saving space by using replacing the destination
file path by an index into the "files" list, but that can also be
changed later (but before the feature is ready to release).
Differential Revision: https://phab.mercurial-scm.org/D6183
$ cat >> $HGRCPATH << EOF
> [diff]
> git=1
> [extensions]
> absorb=
> EOF
$ sedi() { # workaround check-code
> pattern="$1"
> shift
> for i in "$@"; do
> sed "$pattern" "$i" > "$i".tmp
> mv "$i".tmp "$i"
> done
> }
rename a to b, then b to a
$ hg init repo1
$ cd repo1
$ echo 1 > a
$ hg ci -A a -m 1
$ hg mv a b
$ echo 2 >> b
$ hg ci -m 2
$ hg mv b a
$ echo 3 >> a
$ hg ci -m 3
$ hg annotate -ncf a
0 eff892de26ec a: 1
1 bf56e1f4f857 b: 2
2 0b888b00216c a: 3
$ sedi 's/$/a/' a
$ hg absorb -apq
showing changes for a
@@ -0,3 +0,3 @@
eff892d -1
bf56e1f -2
0b888b0 -3
eff892d +1a
bf56e1f +2a
0b888b0 +3a
3 changesets affected
0b888b0 3
bf56e1f 2
eff892d 1
$ hg status
$ hg annotate -ncf a
0 5d1c5620e6f2 a: 1a
1 9a14ffe67ae9 b: 2a
2 9191d121a268 a: 3a
when the first changeset is public
$ hg phase --public -r 0
$ sedi 's/a/A/' a
$ hg absorb -apq
showing changes for a
@@ -0,3 +0,3 @@
-1a
9a14ffe -2a
9191d12 -3a
+1A
9a14ffe +2A
9191d12 +3A
2 changesets affected
9191d12 3
9a14ffe 2
$ hg diff
diff --git a/a b/a
--- a/a
+++ b/a
@@ -1,3 +1,3 @@
-1a
+1A
2A
3A
copy a to b
$ cd ..
$ hg init repo2
$ cd repo2
$ echo 1 > a
$ hg ci -A a -m 1
$ hg cp a b
$ echo 2 >> b
$ hg ci -m 2
$ hg log -T '{rev}:{node|short} {desc}\n'
1:17b72129ab68 2
0:eff892de26ec 1
$ sedi 's/$/a/' a
$ sedi 's/$/b/' b
$ hg absorb -apq
showing changes for a
@@ -0,1 +0,1 @@
eff892d -1
eff892d +1a
showing changes for b
@@ -0,2 +0,2 @@
-1
17b7212 -2
+1b
17b7212 +2b
2 changesets affected
17b7212 2
eff892d 1
$ hg diff
diff --git a/b b/b
--- a/b
+++ b/b
@@ -1,2 +1,2 @@
-1
+1b
2b
copy b to a
$ cd ..
$ hg init repo3
$ cd repo3
$ echo 1 > b
$ hg ci -A b -m 1
$ hg cp b a
$ echo 2 >> a
$ hg ci -m 2
$ hg log -T '{rev}:{node|short} {desc}\n'
1:e62c256d8b24 2
0:55105f940d5c 1
$ sedi 's/$/a/' a
$ sedi 's/$/a/' b
$ hg absorb -apq
showing changes for a
@@ -0,2 +0,2 @@
-1
e62c256 -2
+1a
e62c256 +2a
showing changes for b
@@ -0,1 +0,1 @@
55105f9 -1
55105f9 +1a
2 changesets affected
e62c256 2
55105f9 1
$ hg diff
diff --git a/a b/a
--- a/a
+++ b/a
@@ -1,2 +1,2 @@
-1
+1a
2a
"move" b to both a and c, follow a - sorted alphabetically
$ cd ..
$ hg init repo4
$ cd repo4
$ echo 1 > b
$ hg ci -A b -m 1
$ hg cp b a
$ hg cp b c
$ hg rm b
$ echo 2 >> a
$ echo 3 >> c
$ hg commit -m cp
$ hg log -T '{rev}:{node|short} {desc}\n'
1:366daad8e679 cp
0:55105f940d5c 1
$ sedi 's/$/a/' a
$ sedi 's/$/c/' c
$ hg absorb -apq
showing changes for a
@@ -0,2 +0,2 @@
55105f9 -1
366daad -2
55105f9 +1a
366daad +2a
showing changes for c
@@ -0,2 +0,2 @@
-1
366daad -3
+1c
366daad +3c
2 changesets affected
366daad cp
55105f9 1
$ hg log -G -p -T '{rev}:{node|short} {desc}\n'
@ 1:70606019f91b cp
| diff --git a/b b/a
| rename from b
| rename to a
| --- a/b
| +++ b/a
| @@ -1,1 +1,2 @@
| 1a
| +2a
| diff --git a/b b/c
| copy from b
| copy to c
| --- a/b
| +++ b/c
| @@ -1,1 +1,2 @@
| -1a
| +1
| +3c
|
o 0:bfb67c3539c1 1
diff --git a/b b/b
new file mode 100644
--- /dev/null
+++ b/b
@@ -0,0 +1,1 @@
+1a
run absorb again would apply the change to c
$ hg absorb -apq
showing changes for c
@@ -0,1 +0,1 @@
7060601 -1
7060601 +1c
1 changesets affected
7060601 cp
$ hg log -G -p -T '{rev}:{node|short} {desc}\n'
@ 1:8bd536cce368 cp
| diff --git a/b b/a
| rename from b
| rename to a
| --- a/b
| +++ b/a
| @@ -1,1 +1,2 @@
| 1a
| +2a
| diff --git a/b b/c
| copy from b
| copy to c
| --- a/b
| +++ b/c
| @@ -1,1 +1,2 @@
| -1a
| +1c
| +3c
|
o 0:bfb67c3539c1 1
diff --git a/b b/b
new file mode 100644
--- /dev/null
+++ b/b
@@ -0,0 +1,1 @@
+1a
"move" b to a, c and d, follow d if a gets renamed to e, and c is deleted
$ cd ..
$ hg init repo5
$ cd repo5
$ echo 1 > b
$ hg ci -A b -m 1
$ hg cp b a
$ hg cp b c
$ hg cp b d
$ hg rm b
$ echo 2 >> a
$ echo 3 >> c
$ echo 4 >> d
$ hg commit -m cp
$ hg mv a e
$ hg rm c
$ hg commit -m mv
$ hg log -T '{rev}:{node|short} {desc}\n'
2:49911557c471 mv
1:7bc3d43ede83 cp
0:55105f940d5c 1
$ sedi 's/$/e/' e
$ sedi 's/$/d/' d
$ hg absorb -apq
showing changes for d
@@ -0,2 +0,2 @@
55105f9 -1
7bc3d43 -4
55105f9 +1d
7bc3d43 +4d
showing changes for e
@@ -0,2 +0,2 @@
-1
7bc3d43 -2
+1e
7bc3d43 +2e
2 changesets affected
7bc3d43 cp
55105f9 1
$ hg diff
diff --git a/e b/e
--- a/e
+++ b/e
@@ -1,2 +1,2 @@
-1
+1e
2e
$ hg log -G -p -T '{rev}:{node|short} {desc}\n'
@ 2:34be9b0c786e mv
| diff --git a/c b/c
| deleted file mode 100644
| --- a/c
| +++ /dev/null
| @@ -1,2 +0,0 @@
| -1
| -3
| diff --git a/a b/e
| rename from a
| rename to e
|
o 1:13e56db5948d cp
| diff --git a/b b/a
| rename from b
| rename to a
| --- a/b
| +++ b/a
| @@ -1,1 +1,2 @@
| -1d
| +1
| +2e
| diff --git a/b b/c
| copy from b
| copy to c
| --- a/b
| +++ b/c
| @@ -1,1 +1,2 @@
| -1d
| +1
| +3
| diff --git a/b b/d
| copy from b
| copy to d
| --- a/b
| +++ b/d
| @@ -1,1 +1,2 @@
| 1d
| +4d
|
o 0:0037613a5dc6 1
diff --git a/b b/b
new file mode 100644
--- /dev/null
+++ b/b
@@ -0,0 +1,1 @@
+1d