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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.
Dirkjan Ochtman - - Load All Authors

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r9402:5d49fdef default
r9725:3f522d2f default
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test-hgweb-diffs
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#!/bin/sh
echo % setting up repo
hg init test
cd test
echo a > a
echo b > b
hg ci -Ama
echo % change permissions for git diffs
chmod 755 a
hg ci -Amb
echo % set up hgweb
hg serve -n test -p $HGPORT -d --pid-file=hg.pid -A access.log -E errors.log
cat hg.pid >> $DAEMON_PIDS
echo % revision
"$TESTDIR/get-with-headers.py" localhost:$HGPORT '/rev/0'
echo % raw revision
"$TESTDIR/get-with-headers.py" localhost:$HGPORT '/raw-rev/0'
echo % diff removed file
"$TESTDIR/get-with-headers.py" localhost:$HGPORT '/diff/tip/a'
echo % set up hgweb with git diffs
"$TESTDIR/killdaemons.py"
hg serve --config 'diff.git=1' -n test -p $HGPORT -d --pid-file=hg.pid -A access.log -E errors.log
cat hg.pid >> $DAEMON_PIDS
echo % revision
"$TESTDIR/get-with-headers.py" localhost:$HGPORT '/rev/0'
echo % revision
"$TESTDIR/get-with-headers.py" localhost:$HGPORT '/raw-rev/0'
echo % diff removed file
"$TESTDIR/get-with-headers.py" localhost:$HGPORT '/diff/tip/a'
echo % errors
cat errors.log