fsmonitor: migrate Python ABCs from collections to collections.abc
The Collections Abstract Base Classes in the collections module are
deprecated since Python 3.3 in favor of collections.abc, and removed
in Python 3.10.
Define helpers.
$ hg_log () { hg log -G -T "{rev}:{node|short}"; }
$ commit () { echo "foo - ${2:-$1}" > $1; hg commit -Aqm "Edited $1"; }
$ strip() { hg --config extensions.strip= strip -q -r "$1" ; }
Setup hg repo.
$ hg init repo
$ cd repo
$ touch x; hg add x; hg commit -m "initial"
$ hg clone -q . ../clone
$ commit a
$ cd ../clone
$ commit b
$ hg pull -q ../repo
$ cat .hg/cache/branch2-visible
222ae9789a75703f9836e44de7db179cbfd420ee 2
a3498d6e39376d2456425dd8c692367bdbf00fa2 o default
222ae9789a75703f9836e44de7db179cbfd420ee o default
$ hg_log
o 2:222ae9789a75
|
| @ 1:a3498d6e3937
|/
o 0:7ab0a3bd758a
$ strip '1:'
The branchmap cache is not adjusted on strip.
Now mentions a changelog entry that has been stripped.
$ cat .hg/cache/branch2-visible
222ae9789a75703f9836e44de7db179cbfd420ee 2
a3498d6e39376d2456425dd8c692367bdbf00fa2 o default
222ae9789a75703f9836e44de7db179cbfd420ee o default
$ commit c
Not adjusted on commit, either.
$ cat .hg/cache/branch2-visible
222ae9789a75703f9836e44de7db179cbfd420ee 2
a3498d6e39376d2456425dd8c692367bdbf00fa2 o default
222ae9789a75703f9836e44de7db179cbfd420ee o default
On pull we end up with the same tip, and so wrongly reuse the invalid cache and crash.
$ hg pull ../repo 2>&1 | grep 'ValueError:'
ValueError: node a3498d6e39376d2456425dd8c692367bdbf00fa2 does not exist (known-bad-output !)