rhg: desambiguate status without decompressing filelog if possible
When status is unsure based on `stat()` and the dirstate if a file is clean
or modified, we need to compare it against the filelog.
This comparison can skip looking at contents if the lengths differ.
This changeset optimize this further to deduce what we can about the length
if the filelog without decompressing it or resolving deltas.
Differential Revision: https://phab.mercurial-scm.org/D11965
#require rhg
$ NO_FALLBACK="env RHG_ON_UNSUPPORTED=abort"
Rhg works well when sparse working copy is enabled.
$ cd "$TESTTMP"
$ hg init repo-sparse
$ cd repo-sparse
$ cat > .hg/hgrc <<EOF
> [extensions]
> sparse=
> EOF
$ echo a > show
$ echo x > hide
$ mkdir dir1 dir2
$ echo x > dir1/x
$ echo y > dir1/y
$ echo z > dir2/z
$ hg ci -Aqm 'initial'
$ hg debugsparse --include 'show'
$ ls -A
.hg
show
$ tip=$(hg log -r . --template '{node}')
$ $NO_FALLBACK rhg files -r "$tip"
dir1/x
dir1/y
dir2/z
hide
show
$ $NO_FALLBACK rhg files
show
$ $NO_FALLBACK rhg cat -r "$tip" hide
x
$ cd ..
We support most things when narrow is enabled, too, with a couple of caveats.
$ . "$TESTDIR/narrow-library.sh"
$ real_hg=$RHG_FALLBACK_EXECUTABLE
$ cat >> $HGRCPATH <<EOF
> [extensions]
> narrow=
> EOF
$ hg clone --narrow ./repo-sparse repo-narrow --include dir1
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 2 changes to 2 files
new changesets 6d714a4a2998
updating to branch default
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cd repo-narrow
$ $NO_FALLBACK rhg cat -r "$tip" dir1/x
x
$ "$real_hg" cat -r "$tip" dir1/x
x
TODO: bad error message
$ $NO_FALLBACK rhg cat -r "$tip" hide
abort: invalid revision identifier: 6d714a4a2998cbfd0620db44da58b749f6565d63
[255]
$ "$real_hg" cat -r "$tip" hide
[1]
A naive implementation of [rhg files] leaks the paths that are supposed to be
hidden by narrow, so we just fall back to hg.
$ $NO_FALLBACK rhg files -r "$tip"
unsupported feature: rhg files -r <rev> is not supported in narrow clones
[252]
$ "$real_hg" files -r "$tip"
dir1/x
dir1/y
Hg status needs to do some filtering based on narrow spec, so we don't
support it in rhg for narrow clones yet.
$ mkdir dir2
$ touch dir2/q
$ "$real_hg" status
$ $NO_FALLBACK rhg --config rhg.status=true status
unsupported feature: rhg status is not supported for sparse checkouts or narrow clones yet
[252]
Adding "orphaned" index files:
$ (cd ..; cp repo-sparse/.hg/store/data/hide.i repo-narrow/.hg/store/data/hide.i)
$ (cd ..; mkdir repo-narrow/.hg/store/data/dir2; cp repo-sparse/.hg/store/data/dir2/z.i repo-narrow/.hg/store/data/dir2/z.i)
$ "$real_hg" verify
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
checked 1 changesets with 2 changes to 2 files
$ "$real_hg" files -r "$tip"
dir1/x
dir1/y
# TODO: even though [hg files] hides the orphaned dir2/z, [hg cat] still shows it.
# rhg has the same issue, but at least it's not specific to rhg.
# This is despite [hg verify] succeeding above.
$ $NO_FALLBACK rhg cat -r "$tip" dir2/z
z
$ "$real_hg" cat -r "$tip" dir2/z
z