Add grep command.
It currently searches all revs of every matching file. I'll change
this soon so that it can still do this, but it will not be the default
behaviour.
Many options are unimplemented. There's only one output mode. Binary
files are not handled yet.
#!/bin/sh
mkdir t
cd t
hg init
echo This is file a1 > a
echo This is file b1 > b
hg add a b
hg commit -m "commit #0" -d "0 0"
echo This is file b22 > b
hg commit -m"comment #1" -d "0 0"
hg update 0
rm b
hg commit -A -m"comment #2" -d "0 0"
# in theory, we shouldn't need the "yes k" below, but it prevents
# this test from hanging when "hg update" erroneously prompts the
# user for "keep or delete"
yes k | hg update 1
# we exit with 0 to avoid the unavoidable SIGPIPE from above causing
# us to fail this test
exit 0