sparse-revlog: new requirement enabled with format.sparse-revlog
The meaning of the new 'sparse-revlog' requirement is that the revlogs are
allowed to contain wider delta chains with larger holes between the interesting
chunks. These sparse delta chains should be read in several chunks to avoid a
potential explosion of memory usage.
Former version won't know how to read a delta chain in several chunks. They
would keep reading them in a single read, and therefore would be subject to the
potential memory explosion. Hence this new requirement: only versions having
support of sparse-revlog reading should be allowed to read such a revlog.
Implementation of this new algorithm and tools to enable or disable the
requirement will follow in the next changesets.
$ cat <<EOF >> $HGRCPATH
> [extensions]
> mq =
> [mq]
> git = keep
> EOF
$ hg init a
$ cd a
$ echo 'base' > base
$ hg ci -Ambase
adding base
$ hg qnew -mmqbase mqbase
$ echo 'patched' > base
$ hg qrefresh
qdiff:
$ hg qdiff
diff -r d20a80d4def3 base
--- a/base Thu Jan 01 00:00:00 1970 +0000
+++ b/base* (glob)
@@ -1,1 +1,1 @@
-base
+patched
qdiff dirname:
$ hg qdiff --nodates .
diff -r d20a80d4def3 base
--- a/base
+++ b/base
@@ -1,1 +1,1 @@
-base
+patched
qdiff filename:
$ hg qdiff --nodates base
diff -r d20a80d4def3 base
--- a/base
+++ b/base
@@ -1,1 +1,1 @@
-base
+patched
$ hg revert -a
$ hg qpop
popping mqbase
patch queue now empty
$ hg qdelete mqbase
$ printf '1\n2\n3\n4\nhello world\ngoodbye world\n7\n8\n9\n' > lines
$ hg ci -Amlines -d '2 0'
adding lines
$ hg qnew -mmqbase2 mqbase2
$ printf '\n\n1\n2\n3\n4\nhello world\n goodbye world\n7\n8\n9\n' > lines
$ hg qdiff --nodates -U 1
diff -r b0c220e1cf43 lines
--- a/lines
+++ b/lines
@@ -1,1 +1,3 @@
+
+
1
@@ -4,4 +6,4 @@
4
-hello world
-goodbye world
+hello world
+ goodbye world
7
$ hg qdiff --nodates -b
diff -r b0c220e1cf43 lines
--- a/lines
+++ b/lines
@@ -1,9 +1,11 @@
+
+
1
2
3
4
hello world
-goodbye world
+ goodbye world
7
8
9
$ hg qdiff --nodates -U 1 -B
diff -r b0c220e1cf43 lines
--- a/lines
+++ b/lines
@@ -4,4 +4,4 @@
4
-hello world
-goodbye world
+hello world
+ goodbye world
7
$ hg qdiff --nodates -w
diff -r b0c220e1cf43 lines
--- a/lines
+++ b/lines
@@ -1,3 +1,5 @@
+
+
1
2
3
$ hg qdiff --nodates --reverse
diff -r b0c220e1cf43 lines
--- a/lines
+++ b/lines
@@ -1,11 +1,9 @@
-
-
1
2
3
4
-hello world
- goodbye world
+hello world
+goodbye world
7
8
9
qdiff preserve existing git flag:
$ hg qrefresh --git
$ echo a >> lines
$ hg qdiff
diff --git a/lines b/lines
--- a/lines
+++ b/lines
@@ -1,9 +1,12 @@
+
+
1
2
3
4
-hello world
-goodbye world
+hello world
+ goodbye world
7
8
9
+a
$ hg qdiff --stat
lines | 7 +++++--
1 files changed, 5 insertions(+), 2 deletions(-)
$ hg qrefresh
qdiff when file deleted (but not removed) in working dir:
$ hg qnew deleted-file
$ echo a > newfile
$ hg add newfile
$ hg qrefresh
$ rm newfile
$ hg qdiff
$ cd ..