tests/test-contrib-pull-logger.t

emitrevision: simplify the fallback to computed delta

Not using the stored delta, or having a full snapshot on disk behave the same
ways, so lets use the same code path for that, this is simpler, and it update
will be simpler.

Check that the pull logger plugins logs pulls
=============================================

Enable the extension

  $ echo "[extensions]" >> $HGRCPATH
  $ echo "pull-logger = $TESTDIR/../contrib/pull_logger.py" >> $HGRCPATH


Check the format of the generated log entries, with a bunch of elements in the
common and heads set

  $ hg init server
  $ hg -R server debugbuilddag '.*2+2'
  $ hg clone ssh://user@dummy/server client --rev 0
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 0 changes to 0 files
  new changesets 1ea73414a91b
  updating to branch default
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ tail -1 server/.hg/pull_log.jsonl
  {"common": ["0000000000000000000000000000000000000000"], "heads": ["1ea73414a91b0920940797d8fc6a11e447f8ea1e"], "logger_version": 0, "timestamp": *} (glob)
  $ hg -R client pull --rev 1 --rev 2
  pulling from ssh://user@dummy/server
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 0 changes to 0 files (+1 heads)
  new changesets d8736c3a2c84:fa28e81e283b
  (run 'hg heads' to see heads, 'hg merge' to merge)
  $ tail -1 server/.hg/pull_log.jsonl
  {"common": ["1ea73414a91b0920940797d8fc6a11e447f8ea1e"], "heads": ["d8736c3a2c84ee759a2821385804bcb67f266ade", "fa28e81e283b3416de4d48ee0dd2d446e9e38d7c"], "logger_version": 0, "timestamp": *} (glob)
  $ hg -R client pull --rev 2 --rev 3
  pulling from ssh://user@dummy/server
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 0 changes to 0 files
  new changesets 944641ddcaef
  (run 'hg update' to get a working copy)
  $ tail -1 server/.hg/pull_log.jsonl
  {"common": ["1ea73414a91b0920940797d8fc6a11e447f8ea1e", "fa28e81e283b3416de4d48ee0dd2d446e9e38d7c"], "heads": ["944641ddcaef174df7ce1bc2751a5f165129778b", "fa28e81e283b3416de4d48ee0dd2d446e9e38d7c"], "logger_version": 0, "timestamp": *} (glob)


Check the number of entries generated in the log when pulling from multiple
clients at the same time

  $ rm -f server/.hg/pull_log.jsonl
  $ for i in $($TESTDIR/seq.py 32); do
  >   hg clone ssh://user@dummy/server client_$i --rev 0
  > done > /dev/null
  $ for i in $($TESTDIR/seq.py 32); do
  >   hg -R client_$i pull --rev 1 &
  > done > /dev/null
  $ wait
  $ wc -l server/.hg/pull_log.jsonl
  \s*64 .* (re)


Test log rotation when reaching some size threshold

  $ cat >> $HGRCPATH << EOF
  > [pull-logger]
  > rotate-size = 1kb
  > EOF

  $ rm -f server/.hg/pull_log.jsonl
  $ for i in $($TESTDIR/seq.py 10); do
  >   hg -R client pull --rev 1
  > done > /dev/null
  $ wc -l server/.hg/pull_log.jsonl
  \s*3 .* (re)
  $ wc -l server/.hg/pull_log.jsonl.rotated
  \s*7 .* (re)