packaging: install and run Inno files in a build directory
Upcoming commits will refactor the Windows installers so their
content is dynamically derived. In preparation for this, we
copy the Inno files into a new build directory and run them
from there. This required changing some relative paths to
work from a new directory level but is otherwise a pretty
straightforward change.
Differential Revision: https://phab.mercurial-scm.org/D7157
$ hg init
$ touch a
$ unset HGUSER
$ echo "[ui]" >> .hg/hgrc
$ echo "username= foo" >> .hg/hgrc
$ echo " bar1" >> .hg/hgrc
$ hg ci -Am m
adding a
abort: username 'foo\nbar1' contains a newline
[255]
$ rm .hg/hgrc
$ HGUSER=`(echo foo; echo bar2)` hg ci -Am m
adding a
abort: username 'foo\nbar2' contains a newline
[255]
$ hg ci -Am m -u "`(echo foo; echo bar3)`"
adding a
transaction abort!
rollback completed
abort: username 'foo\nbar3' contains a newline!
[255]