branchcache: skip entries that are topological heads in the on disk file
In the majority of cases, topological heads are also branch heads. We have
efficient way to get the topological heads and efficient way to retrieve
their branch information. So there is little value in putting them in the branch
cache file explicitly. On the contrary, writing them explicitly tend to create
very large cache file that are inefficient to read and update.
So the branch cache v3 format is no longer including them. This changeset focus
on the format aspect and have no focus on the performance aspect. We will cover
that later.
Test EOL update
$ cat >> $HGRCPATH <<EOF
> [diff]
> git = 1
> EOF
$ seteol () {
> if [ $1 = "LF" ]; then
> EOL='\n'
> else
> EOL='\r\n'
> fi
> }
$ makerepo () {
> echo
> echo "# ==== setup repository ===="
> echo '% hg init'
> hg init repo
> cd repo
>
> cat > .hgeol <<EOF
> [patterns]
> **.txt = LF
> EOF
>
> printf "first\nsecond\nthird\n" > a.txt
> printf "f\r\n" > f
> hg commit --addremove -m 'LF commit'
>
> cat > .hgeol <<EOF
> [patterns]
> **.txt = CRLF
> f = LF
> EOF
>
> printf "first\r\nsecond\r\nthird\r\n" > a.txt
> printf "f\n" > f
> hg commit -m 'CRLF commit'
>
> cd ..
> }
$ dotest () {
> seteol $1
>
> echo
> echo "% hg clone repo repo-$1"
> hg clone --noupdate repo repo-$1
> cd repo-$1
>
> cat > .hg/hgrc <<EOF
> [extensions]
> eol =
> EOF
>
> hg update
>
> echo '% a.txt (before)'
> cat a.txt
>
> printf "first${EOL}third${EOL}" > a.txt
>
> echo '% a.txt (after)'
> cat a.txt
> echo '% hg diff'
> hg diff
>
> echo '% hg update 0'
> hg update 0
>
> echo '% a.txt'
> cat a.txt
> echo '% hg diff'
> hg diff
>
>
> cd ..
> rm -r repo-$1
> }
$ makerepo
# ==== setup repository ====
% hg init
adding .hgeol
adding a.txt
adding f
$ dotest LF
% hg clone repo repo-LF
3 files updated, 0 files merged, 0 files removed, 0 files unresolved
% a.txt (before)
first\r (esc)
second\r (esc)
third\r (esc)
% a.txt (after)
first
third
% hg diff
diff --git a/a.txt b/a.txt
--- a/a.txt
+++ b/a.txt
@@ -1,3 +1,2 @@
first\r (esc)
-second\r (esc)
third\r (esc)
% hg update 0
merging a.txt
2 files updated, 1 files merged, 0 files removed, 0 files unresolved
% a.txt
first
third
% hg diff
diff --git a/a.txt b/a.txt
--- a/a.txt
+++ b/a.txt
@@ -1,3 +1,2 @@
first
-second
third
$ dotest CRLF
% hg clone repo repo-CRLF
3 files updated, 0 files merged, 0 files removed, 0 files unresolved
% a.txt (before)
first\r (esc)
second\r (esc)
third\r (esc)
% a.txt (after)
first\r (esc)
third\r (esc)
% hg diff
diff --git a/a.txt b/a.txt
--- a/a.txt
+++ b/a.txt
@@ -1,3 +1,2 @@
first\r (esc)
-second\r (esc)
third\r (esc)
% hg update 0
merging a.txt
2 files updated, 1 files merged, 0 files removed, 0 files unresolved
% a.txt
first
third
% hg diff
diff --git a/a.txt b/a.txt
--- a/a.txt
+++ b/a.txt
@@ -1,3 +1,2 @@
first
-second
third
Test in repo using eol extension, while keeping an eye on how filters are
applied:
$ cd repo
$ hg up -q -c -r null
$ cat > .hg/hgrc <<EOF
> [extensions]
> eol =
> EOF
Update to revision 0 which has no .hgeol, shouldn't use any filters, and
obviously should leave things as tidy as they were before the clean update.
$ hg up -c -r 0 -v --debug
resolving manifests
branchmerge: False, force: False, partial: False
ancestor: 000000000000, local: 000000000000+, remote: 15cbdf8ca3db
calling hook preupdate.eol: hgext.eol.preupdate
.hgeol: remote created -> g
getting .hgeol
filtering .hgeol through isbinary
a.txt: remote created -> g
getting a.txt
filtering a.txt through tolf
f: remote created -> g
getting f
3 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg st
$ hg branch b
marked working directory as branch b
(branches are permanent and global, did you want a bookmark?)
$ hg ci -m b
Merge changes that apply a filter to f:
$ hg merge 1
3 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ hg st
M .hgeol
M a.txt
M f
$ hg diff
diff --git a/.hgeol b/.hgeol
--- a/.hgeol
+++ b/.hgeol
@@ -1,2 +1,3 @@
[patterns]
-**.txt = LF
+**.txt = CRLF
+f = LF
diff --git a/a.txt b/a.txt
--- a/a.txt
+++ b/a.txt
@@ -1,3 +1,3 @@
-first
-second
-third
+first\r (esc)
+second\r (esc)
+third\r (esc)
diff --git a/f b/f
--- a/f
+++ b/f
@@ -1,1 +1,1 @@
-f\r (esc)
+f
Abort the merge with up -C to revision 0.
Note that files are filtered correctly for revision 0: f is not filtered, a.txt
is filtered with tolf, and everything is left tidy.
$ touch .hgeol * # ensure consistent dirtyness checks ignoring dirstate
$ hg up -C -r 0 -v --debug
eol: detected change in .hgeol
resolving manifests
branchmerge: False, force: True, partial: False
ancestor: 1db78bdd3bd6+, local: 1db78bdd3bd6+, remote: 15cbdf8ca3db
calling hook preupdate.eol: hgext.eol.preupdate
.hgeol: remote is newer -> g
getting .hgeol
filtering .hgeol through isbinary
a.txt: remote is newer -> g
getting a.txt
filtering a.txt through tolf
f: remote is newer -> g
getting f
3 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ touch .hgeol *
$ hg st --debug
eol: detected change in .hgeol
filtering .hgeol through isbinary
filtering a.txt through tolf
skip updating dirstate: identity mismatch (?)
$ hg diff
Things were clean, and updating again will not change anything:
$ touch .hgeol *
$ hg up -C -r 0 -v --debug
eol: detected change in .hgeol
filtering .hgeol through isbinary
filtering a.txt through tolf
resolving manifests
branchmerge: False, force: True, partial: False
ancestor: 15cbdf8ca3db+, local: 15cbdf8ca3db+, remote: 15cbdf8ca3db
calling hook preupdate.eol: hgext.eol.preupdate
starting 4 threads for background file closing (?)
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ touch .hgeol *
$ hg st --debug
eol: detected change in .hgeol
filtering .hgeol through isbinary
filtering a.txt through tolf
$ cd ..
$ rm -r repo