hook: flush stdout before redirecting to stderr
When hook output redirection is enabled (e.g. when cloning over ssh), hook
output on stdout is redirected to stderr, to prevent the repository data on
stdout from being corrupted.
In certain cases, the redirection could cause part of the repository data to
end up on stderr as well. In case of a clone, this causes:
"abort: consistency error in delta!"
This was seen with a clone over ssh, an outgoing hook present (any
non-python type, e.g. 'pwd'), on certain repositories only,
probably depending on the distribution of the sent data)
This patch updates the hook redirection code to flush stdout before
redirecting, removing the problem.
import: fix parent selection when importing merges
With "wp1" and "wp2" the current working directory parents, "p1" and "p2" the
patch parents and "parents" the resulting commit parents, the current behaviour
is:
--bypass --exact p2 parents
0 0 0 [wp1, wp2]
0 0 1 [wp1, wp2]/buggy
0 1 0 [p1]
0 1 1 [p1, p2]
1 0 0 [wp1, wp2]
1 0 1 [p1, p2]
1 1 0 [p1]
1 1 1 [p1, p2]
The original behaviour before
f53dc0787424 was:
--bypass --exact p2 parents
0 0 0 [wp1, wp2]
0 0 1 if p1 == wp1 then [p1, p2] otherwise [wp1, wp2]
0 1 0 [p1]
0 1 1 [p1, p2]
This patch restores the previous behaviour when --bypass is not set, and align
--bypass behaviour when --exact is not set with merge diffs.