diff --git a/mercurial/hook.py b/mercurial/hook.py --- a/mercurial/hook.py +++ b/mercurial/hook.py @@ -158,6 +158,10 @@ env[b'HG_HOOKNAME'] = name for k, v in pycompat.iteritems(args): + # transaction changes can accumulate MBs of data, so skip it + # for external hooks + if k == b'changes': + continue if callable(v): v = v() if isinstance(v, (dict, list)): diff --git a/mercurial/localrepo.py b/mercurial/localrepo.py --- a/mercurial/localrepo.py +++ b/mercurial/localrepo.py @@ -2237,6 +2237,7 @@ tr.hookargs[b'txnid'] = txnid tr.hookargs[b'txnname'] = desc + tr.hookargs[b'changes'] = tr.changes # note: writing the fncache only during finalize mean that the file is # outdated when running hooks. As fncache is used for streaming clone, # this is not expected to break anything that happen during the hooks. diff --git a/tests/test-hook.t b/tests/test-hook.t --- a/tests/test-hook.t +++ b/tests/test-hook.t @@ -443,7 +443,7 @@ HG_PENDING=$TESTTMP/a transaction abort! - txnabort Python hook: txnid,txnname + txnabort Python hook: changes,txnid,txnname txnabort hook: HG_HOOKNAME=txnabort.1 HG_HOOKTYPE=txnabort HG_TXNID=TXN:$ID$