repoview: add caching bits
Add a caching infrastructure to cache hidden changesets. The cache tries to read
the cache lazily and falls back to recomputing if no wlock can be obtain.
To validate the cache we store a sha of the obstore content and repo heads in
the beginning of the cache which we check every request.
Testing cloning with the EOL extension
$ cat >> $HGRCPATH <<EOF
> [extensions]
> eol =
>
> [eol]
> native = CRLF
> EOF
setup repository
$ hg init repo
$ cd repo
$ cat > .hgeol <<EOF
> [patterns]
> **.txt = native
> EOF
$ printf "first\r\nsecond\r\nthird\r\n" > a.txt
$ hg commit --addremove -m 'checkin'
adding .hgeol
adding a.txt
Clone
$ cd ..
$ hg clone repo repo-2
updating to branch default
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cd repo-2
$ cat a.txt
first\r (esc)
second\r (esc)
third\r (esc)
$ hg cat a.txt
first
second
third
$ hg remove .hgeol
$ hg commit -m 'remove eol'
$ hg push --quiet
$ cd ..
Test clone of repo with .hgeol in working dir, but no .hgeol in tip
$ hg clone repo repo-3
updating to branch default
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cd repo-3
$ cat a.txt
first
second
third
Test clone of revision with .hgeol
$ cd ..
$ hg clone -r 0 repo repo-4
adding changesets
adding manifests
adding file changes
added 1 changesets with 2 changes to 2 files
updating to branch default
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cd repo-4
$ cat .hgeol
[patterns]
**.txt = native
$ cat a.txt
first\r (esc)
second\r (esc)
third\r (esc)
$ cd ..