#testcases skip-detection fail-if-detected

Test situations that "should" only be reproducible:

- on networked filesystems, or

- user using `hg debuglocks` to eliminate the lock file, or

- something (that doesn't respect the lock file) writing to the .hg directory

while we're running

  $ hg init a

  $ cd a

  $ cat > "$TESTTMP/waitlock_editor.sh" <<EOF

  >     [ -n "\${WAITLOCK_ANNOUNCE:-}" ] && touch "\${WAITLOCK_ANNOUNCE}"

  >     f="\${WAITLOCK_FILE}"

  >     start=\`date +%s\`

  >     timeout=5

  >     while [ \\( ! -f \$f \\) -a \\( ! -L \$f \\) ]; do

  >         now=\`date +%s\`

  >         if [ "\`expr \$now - \$start\`" -gt \$timeout ]; then

  >             echo "timeout: \$f was not created in \$timeout seconds (it is now \$(date +%s))"

  >             exit 1

  >         fi

  >         sleep 0.1

  >     done

  >     if [ \$# -gt 1 ]; then

  >         cat "\$@"

  >     fi

  > EOF

Things behave differently if we don't already have a 00changelog.i file when

this all starts, so let's make one.

  $ echo r0 > r0

  $ hg commit -qAm 'r0'

Start an hg commit that will take a while

  $ EDITOR_STARTED="$(pwd)/.editor_started"

  $ MISCHIEF_MANAGED="$(pwd)/.mischief_managed"

  $ JOBS_FINISHED="$(pwd)/.jobs_finished"

#if fail-if-detected

  $ cat >> .hg/hgrc << EOF

  > [debug]

  > revlog.verifyposition.changelog = fail

  > EOF

#endif

  $ echo foo > foo

  $ (WAITLOCK_ANNOUNCE="${EDITOR_STARTED}" \

  >      WAITLOCK_FILE="${MISCHIEF_MANAGED}" \

  >           HGEDITOR="sh $TESTTMP/waitlock_editor.sh" \

  >           hg commit -qAm 'r1 (foo)' --edit foo > .foo_commit_out 2>&1 ; touch "${JOBS_FINISHED}") &

Wait for the "editor" to actually start

  $ WAITLOCK_FILE="${EDITOR_STARTED}" sh "$TESTTMP/waitlock_editor.sh"

Break the locks, and make another commit.

  $ hg debuglocks -LW

  $ echo bar > bar

  $ hg commit -qAm 'r2 (bar)' bar

  $ hg debugrevlogindex -c

     rev linkrev nodeid       p1           p2

       0       0 222799e2f90b 000000000000 000000000000

       1       1 6f124f6007a0 222799e2f90b 000000000000

Awaken the editor from that first commit

  $ touch "${MISCHIEF_MANAGED}"

And wait for it to finish

  $ WAITLOCK_FILE="${JOBS_FINISHED}" sh "$TESTTMP/waitlock_editor.sh"

#if skip-detection

(Ensure there was no output)

  $ cat .foo_commit_out

And observe a corrupted repository -- rev 2's linkrev is 1, which should never

happen for the changelog (the linkrev should always refer to itself).

  $ hg debugrevlogindex -c

     rev linkrev nodeid       p1           p2

       0       0 222799e2f90b 000000000000 000000000000

       1       1 6f124f6007a0 222799e2f90b 000000000000

       2       1 ac80e6205bb2 222799e2f90b 000000000000

#endif

#if fail-if-detected

  $ cat .foo_commit_out

  transaction abort!

  rollback completed

  note: commit message saved in .hg/last-message.txt

  note: use 'hg commit --logfile .hg/last-message.txt --edit' to reuse it

  abort: 00changelog.i: file cursor at position 249, expected 121

And no corruption in the changelog.

  $ hg debugrevlogindex -c

     rev linkrev nodeid       p1           p2

       0       0 222799e2f90b 000000000000 000000000000

       1       1 6f124f6007a0 222799e2f90b 000000000000 (missing-correct-output !)

And, because of transactions, there's none in the manifestlog either.

  $ hg debugrevlogindex -m

     rev linkrev nodeid       p1           p2

       0       0 7b7020262a56 000000000000 000000000000

       1       1 ad3fe36d86d9 7b7020262a56 000000000000

#endif