tests/test-subrepo-paths.t

clfilter: fallback to unfiltered version when linkrev point to filtered history


On `filectx`, linkrev may point to any revision in the repository. When the
repository is filtered this may lead to `filectx` trying to build `changectx`
for filtered revision. In such case we fallback to creating `changectx` on the
unfiltered version of the reposition. This fallback should not be an issue
because `changectx` from `filectx` are not used in complex operation that
care about filtering. It is complicated to work around the issue in a
clearer way as code raising such `filectx` rarely have access to the
repository directly.

Linkrevs create a lot of issue with filtering. It is stored in revlog entry at
creation time and never changed. Nothing prevent the changeset revision pointed
to become filtered. Several bogus behavior emerge from such situation. Those
bugs are complex to solve and not part of the current effort to install
filtering. This changeset is simple hack that prevent plain crash in favor on
minor misbehavior without visible effect.

This "hack" is longly documented in to code itself to help people that would
look at it in the future.

  $ hg init outer
  $ cd outer

  $ echo '[paths]' >> .hg/hgrc
  $ echo 'default = http://example.net/' >> .hg/hgrc

hg debugsub with no remapping

  $ echo 'sub = libfoo' > .hgsub
  $ hg add .hgsub

  $ hg debugsub
  path sub
   source   libfoo
   revision 

hg debugsub with remapping

  $ echo '[subpaths]' >> .hg/hgrc
  $ printf 'http://example.net/lib(.*) = C:\\libs\\\\1-lib\\\n' >> .hg/hgrc # no-check-code

  $ hg debugsub
  path sub
   source   C:\libs\foo-lib\
   revision 

test cumulative remapping, the $HGRCPATH file is loaded first

  $ echo '[subpaths]' >> $HGRCPATH
  $ echo 'libfoo = libbar' >> $HGRCPATH
  $ hg debugsub
  path sub
   source   C:\libs\bar-lib\
   revision 

test absolute source path -- testing with a URL is important since
standard os.path.join wont treat that as an absolute path

  $ echo 'abs = http://example.net/abs' > .hgsub
  $ hg debugsub
  path abs
   source   http://example.net/abs
   revision 

  $ echo 'abs = /abs' > .hgsub
  $ hg debugsub
  path abs
   source   /abs
   revision 

test bad subpaths pattern

  $ cat > .hg/hgrc <<EOF
  > [subpaths]
  > .* = \1
  > EOF
  $ hg debugsub
  abort: bad subrepository pattern in $TESTTMP/outer/.hg/hgrc:2: invalid group reference (glob)
  [255]

  $ cd ..