comparison tests/test-obsolete.t @ 27917:97e0dc6d248c stable

repoview: fix corrupted hiddencache crash Mercurial (issue5042)

Before this patch if the hiddencache existed but was empty, it would crash
mercurial. This patch adds exception handling when reading the hiddencache to
avoid the issue.
When encountering a corrupted cache file we print a devel warning. There would
be no point in issuing a normal warning as the user wouldn't be able to do
anything about the situation.

The warning looks like:

devel-warn: corrupted hidden cache, removing it at: /path/to/repoview.py

27916:9a09a9cfa503

  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo aa > a
  $ hg amendtransient
  [1, 3]

Test cache consistency for the visible filter
1) We want to make sure that the cached filtered revs are invalidated when
bookmarks change
  $ cd ..
  $ cat >$TESTTMP/test_extension.py  << EOF

27917:97e0dc6d248c

  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo aa > a
  $ hg amendtransient
  [1, 3]

Check that corrupted hidden cache does not crash

  $ printf "" > .hg/cache/hidden
  $ hg log -r . -T '{node}' --debug
  corrupted hidden cache
  8fd96dfc63e51ed5a8af1bec18eb4b19dbf83812 (no-eol)
  $ hg log -r . -T '{node}' --debug
  8fd96dfc63e51ed5a8af1bec18eb4b19dbf83812 (no-eol)

Check that wrong hidden cache permission does not crash

  $ chmod 000 .hg/cache/hidden
  $ hg log -r . -T '{node}' --debug
  cannot read hidden cache
  error writing hidden changesets cache
  8fd96dfc63e51ed5a8af1bec18eb4b19dbf83812 (no-eol)

Test cache consistency for the visible filter
1) We want to make sure that the cached filtered revs are invalidated when
bookmarks change
  $ cd ..
  $ cat >$TESTTMP/test_extension.py  << EOF