id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc	difficulty	ghcversion	platform
931	Support building source trees with many packages	tibbe		"A not uncommon use case is building a package against a set of dependencies that exist in (unreleased) source form. For example, given two packages:

{{{
$ ls
hashable
unordered-containers
}}}

I'd like to be able to

{{{
$ cd unordered-containers
cabal build --root=..
}}}

Cabal should then recursively traverse directories from `--root`, looking for .cabal files to use when fulfilling dependencies (i.e. in this case it'd find `hashable`.) Those dependencies should also be marked as preferred to any Hackage versions of the package with the same version number.

It'd also be convenient to add several `--root` flags, so one can specify specific packages to use in source form (without using e.g. the user's complete `~/src` directory.)

{{{
$ cd unordered-containers
cabal build --root=../hashable --root=../text
}}}
"	enhancement	new	normal	cabal-install-0.16	cabal-install tool	1.10.2.0	normal			byorgey@…	unknown