tests/test-lfs-bundle.t

streamclone: treat volatile file as "fullfile"

The nodemap related file might change (or get deleted) during the stream clone
in a way incompatible with the streaming process.

So we introduce a new flag for this type of file and integrate it with the
existing `revlog_type` field recently added to `store.walk` returns.

We use that new flat to dispatch such file to the existing mechanism for "atomic
replacement" file for the nodemap docket and datafile. This fix the bugs we have
been adding tests for.

Strictly speaking, the nodemap datafile is happened only a could maybe be used
in a slightly more efficient way, however this is good enough for now.

Differential Revision: https://phab.mercurial-scm.org/D10481

In this test, we want to test LFS bundle application on both LFS and non-LFS
repos.

To make it more interesting, the file revisions will contain hg filelog
metadata ('\1\n'). The bundle will have 1 file revision overlapping with the
destination repo.

#  rev      1          2         3
#  repo:    yes        yes       no
#  bundle:  no (base)  yes       yes (deltabase: 2 if possible)

It is interesting because rev 2 could have been stored as LFS in the repo, and
non-LFS in the bundle; or vice-versa.

Init

  $ cat >> $HGRCPATH << EOF
  > [extensions]
  > lfs=
  > drawdag=$TESTDIR/drawdag.py
  > [lfs]
  > url=file:$TESTTMP/lfs-remote
  > EOF

Helper functions

  $ commitxy() {
  > hg debugdrawdag "$@" <<'EOS'
  >  Y  # Y/X=\1\nAAAA\nE\nF
  >  |  # Y/Y=\1\nAAAA\nG\nH
  >  X  # X/X=\1\nAAAA\nC\n
  >     # X/Y=\1\nAAAA\nD\n
  > EOS
  > }

  $ commitz() {
  > hg debugdrawdag "$@" <<'EOS'
  >  Z  # Z/X=\1\nAAAA\nI\n
  >  |  # Z/Y=\1\nAAAA\nJ\n
  >  |  # Z/Z=\1\nZ
  >  Y
  > EOS
  > }

  $ enablelfs() {
  >   cat >> .hg/hgrc <<EOF
  > [lfs]
  > track=all()
  > EOF
  > }

Generate bundles

  $ for i in normal lfs; do
  >   NAME=src-$i
  >   hg init $TESTTMP/$NAME
  >   cd $TESTTMP/$NAME
  >   [ $i = lfs ] && enablelfs
  >   commitxy
  >   commitz
  >   hg bundle -q --base X -r Y+Z $TESTTMP/$NAME.bundle
  >   SRCNAMES="$SRCNAMES $NAME"
  > done

Prepare destination repos

  $ for i in normal lfs; do
  >   NAME=dst-$i
  >   hg init $TESTTMP/$NAME
  >   cd $TESTTMP/$NAME
  >   [ $i = lfs ] && enablelfs
  >   commitxy
  >   DSTNAMES="$DSTNAMES $NAME"
  > done

Apply bundles

  $ for i in $SRCNAMES; do
  >   for j in $DSTNAMES; do
  >     echo ---- Applying $i.bundle to $j ----
  >     cp -R $TESTTMP/$j $TESTTMP/tmp-$i-$j
  >     cd $TESTTMP/tmp-$i-$j
  >     if hg unbundle $TESTTMP/$i.bundle -q 2>/dev/null; then
  >       hg verify -q && echo OK
  >     else
  >       echo CRASHED
  >     fi
  >   done
  > done
  ---- Applying src-normal.bundle to dst-normal ----
  OK
  ---- Applying src-normal.bundle to dst-lfs ----
  OK
  ---- Applying src-lfs.bundle to dst-normal ----
  OK
  ---- Applying src-lfs.bundle to dst-lfs ----
  OK

Hint if the cache location cannot be inferred from the environment

#if windows
  $ unset LOCALAPPDATA
  $ unset APPDATA
  $ HGRCPATH= hg config lfs --debug
  abort: unknown lfs usercache location
  (define LOCALAPPDATA or APPDATA in the environment, or set lfs.usercache)
  [255]
#endif

#if osx
  $ unset HOME
  $ HGRCPATH= hg config lfs --debug
  abort: unknown lfs usercache location
  (define HOME in the environment, or set lfs.usercache)
  [255]
#endif

#if no-windows no-osx
  $ unset XDG_CACHE_HOME
  $ unset HOME
  $ HGRCPATH= hg config lfs --debug
  abort: unknown lfs usercache location
  (define XDG_CACHE_HOME or HOME in the environment, or set lfs.usercache)
  [255]
#endif