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diff: add --inverse option...
diff: add --inverse option Most of the time, one can reverse a diff by swapping the revisions passed with -r but it happens that if you use the global -R, and diff against the tip of the current repo, you can't swap the revisions. One use-case for that is reviewing changes from a bundle before unbundling. One could also pipe the output of `hg diff` to a command line filter that reverses the diff, but that would remove the benefit from color diffs. Therefore, having an option in `hg diff` to reverse a diff is a good thing. The option flag selection was tricky. GNU patch uses -R/--reverse but -R is already used as a global option and --reverse would make --rev ambiguous.

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test-hgwebdirsym
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#!/bin/sh
# Tests whether or not hgwebdir properly handles various symlink topologies.
"$TESTDIR/hghave" symlink || exit 80
hg init a
echo a > a/a
hg --cwd a ci -Ama -d'1 0'
mkdir webdir
cd webdir
hg init b
echo b > b/b
hg --cwd b ci -Amb -d'2 0'
hg init c
echo c > c/c
hg --cwd c ci -Amc -d'3 0'
ln -s ../a al
ln -s ../webdir circle
root=`pwd`
cd ..
cat > collections.conf <<EOF
[collections]
$root=$root
EOF
hg serve -p $HGPORT -d --pid-file=hg.pid --webdir-conf collections.conf \
-A access-collections.log -E error-collections.log
cat hg.pid >> $DAEMON_PIDS
echo % should succeed
"$TESTDIR/get-with-headers.py" localhost:$HGPORT '/?style=raw'
"$TESTDIR/get-with-headers.py" localhost:$HGPORT '/al/file/tip/a?style=raw'
"$TESTDIR/get-with-headers.py" localhost:$HGPORT '/b/file/tip/b?style=raw'
"$TESTDIR/get-with-headers.py" localhost:$HGPORT '/c/file/tip/c?style=raw'
echo % should fail
"$TESTDIR/get-with-headers.py" localhost:$HGPORT '/circle/al/file/tip/a?style=raw'
"$TESTDIR/get-with-headers.py" localhost:$HGPORT '/circle/b/file/tip/a?style=raw'
"$TESTDIR/get-with-headers.py" localhost:$HGPORT '/circle/c/file/tip/a?style=raw'
echo % collections errors
cat error-collections.log