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Eelco Dolstra 7f38087f35 Add a command "nix-build --run-env" to reproduce the environment of a derivation
This command builds or fetches all dependencies of the given
derivation, then starts a shell with the environment variables from
the derivation.  This shell also sources $stdenv/setup to initialise
the environment further.

The current directory is not changed.  Thus this is a convenient way
to reproduce a build environment in an existing working tree.

Existing environment variables are left untouched (unless the
derivation overrides them).  As a special hack, the original value of
$PATH is appended to the $PATH produced by $stdenv/setup.

Example session:

$ nix-build --run-env '<nixpkgs>' -A xterm
(the dependencies of xterm are built/fetched...)
$ tar xf $src
$ ./configure
$ make
$ emacs
(... hack source ...)
$ make
$ ./xterm
2012-03-19 04:14:21 +01:00
..
lib/Nix Add a command "nix-build --run-env" to reproduce the environment of a derivation 2012-03-19 04:14:21 +01:00
Makefile.am * Don't distribute Store.cc, it's generated automatically by xsubpp. 2012-01-18 16:43:48 +00:00
MANIFEST * Include the Nix Perl bindings in Nix itself. This will allow the 2011-10-10 18:12:40 +00:00