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Fix long-standing excessive file merges...
Fix long-standing excessive file merges Since switching to the multihead approach, we've been creating excessive file-level merges where files are marked as merged with their ancestors. This explicitly checks at commit time whether the two parent versions are linearly related, and if so, reduces the file check-in to a non-merge. Then the file is compared against the remaining parent, and, if equal, skips check-in of that file (as it's not changed). Since we're not checking in all files that were different between versions, we no longer need to mark so many files for merge. This removes most of the 'm' state marking as well. Finally, it is possible to do a tree-level merge with no file-level changes. This will happen if one user changes file A and another changes file B. Thus, if we have have two parents, we allow commit to proceed even if there are no file-level changes.

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r925:5a034646 default
r990:5007e0bd default
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run-tests
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#!/bin/sh -e
LANG="C"; export LANG
LC_CTYPE="C"; export LC_CTYPE
LC_NUMERIC="C"; export LC_NUMERIC
LC_TIME="C"; export LC_TIME
LC_COLLATE="C"; export LC_COLLATE
LC_MONETARY="C"; export LC_MONETARY
LC_MESSAGES="C"; export LC_MESSAGES
LC_PAPER="C"; export LC_PAPER
LC_NAME="C"; export LC_NAME
LC_ADDRESS="C"; export LC_ADDRESS
LC_TELEPHONE="C"; export LC_TELEPHONE
LC_MEASUREMENT="C"; export LC_MEASUREMENT
LC_IDENTIFICATION="C"; export LC_IDENTIFICATION
LC_ALL=""; export LC_ALL
TZ=GMT; export TZ
HGEDITOR=true; export HGEDITOR
HGMERGE=true; export HGMERGE
HGUSER="test"; export HGUSER
umask 022
tests=0
failed=0
HGTMP=""
cleanup_exit() {
rm -rf "$HGTMP"
}
# Remove temporary files even if we get interrupted
trap "cleanup_exit" 0 # normal exit
trap "exit 255" 1 2 3 6 15 # HUP INT QUIT ABRT TERM
HGTMP="${TMPDIR-/tmp}/hgtests.$RANDOM.$RANDOM.$RANDOM.$$"
(umask 077 && mkdir "$HGTMP") || {
echo "Could not create temporary directory! Exiting." 1>&2
exit 1
}
TESTDIR="$PWD"
if [ -d /usr/lib64 ]; then
lib=lib64
else
lib=lib
fi
INST="$HGTMP/install"
cd ..
if ${PYTHON-python} setup.py install --home="$INST" > tests/install.err 2>&1
then
rm tests/install.err
else
cat tests/install.err
exit 1
fi
cd "$TESTDIR"
PATH="$INST/bin:$PATH"; export PATH
PYTHONPATH="$INST/$lib/python"; export PYTHONPATH
run_one() {
rm -f "$1.err"
mkdir "$HGTMP/$1"
cd "$HGTMP/$1"
fail=0
HOME="$HGTMP/$1"; export HOME
OUT="$HGTMP/$1.out"
OUTOK="$TESTDIR/$1.out"
ERR="$TESTDIR/$1.err"
if "$TESTDIR/$1" > "$OUT" 2>&1; then
: no error
else
echo "$1 failed with error code $?"
fail=1
fi
if [ -s "$OUT" -a ! -s "$OUTOK" ] ; then
cp "$OUT" "$ERR"
echo
echo "$1 generated unexpected output:"
cat "$ERR"
fail=1
elif [ -r "$OUTOK" ]; then
if diff -u "$OUTOK" "$OUT" > /dev/null; then
: no differences
else
cp "$OUT" "$ERR"
echo
echo "$1 output changed:"
diff -u "$OUTOK" "$ERR" || true
fail=1
fi
fi
cd "$TESTDIR"
rm -f "$HGTMP/$1.out"
rm -rf "$HGTMP/$1"
return $fail
}
TESTS="$*"
if [ -z "$TESTS" ] ; then
TESTS=`ls test-* | grep -v "[.~]"`
fi
for f in $TESTS ; do
echo -n "."
run_one $f || failed=`expr $failed + 1`
tests=`expr $tests + 1`
done
echo
echo "Ran $tests tests, $failed failed."
if [ $failed -gt 0 ] ; then
exit 1
fi
exit 0