chg: fallback to original hg if stdio fds are missing
If stdio fds are missing (ex. fd 0 is not present), chg might open
fds that take the numbers 0, and attachio would send the wrong fds
to the client, which might cause unwanted behaviors. Avoid that by
detecting the missing fds and falling back to the original hg.
Differential Revision: https://phab.mercurial-scm.org/D9058
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