nixpkgs/pkgs/build-support/buildenv/default.nix
Eelco Dolstra e4610f2965 buildEnv: Support package priorities like nix-env
This gets rid of a bunch of collision warnings.
2015-08-25 00:40:40 +02:00

42 lines
1 KiB
Nix

# buildEnv creates a tree of symlinks to the specified paths. This is
# a fork of the buildEnv in the Nix distribution. Most changes should
# eventually be merged back into the Nix distribution.
{ perl, runCommand }:
{ name
, # The manifest file (if any). A symlink $out/manifest will be
# created to it.
manifest ? ""
, # The paths to symlink.
paths
, # Whether to ignore collisions or abort.
ignoreCollisions ? false
, # The paths (relative to each element of `paths') that we want to
# symlink (e.g., ["/bin"]). Any file not inside any of the
# directories in the list is not symlinked.
pathsToLink ? ["/"]
, # Shell command to run after building the symlink tree.
postBuild ? ""
, passthru ? {}
}:
runCommand name
{ inherit manifest ignoreCollisions passthru pathsToLink postBuild;
pkgs = builtins.toJSON (map (drv: {
paths = [ drv ]; # FIXME: handle multiple outputs
priority = drv.meta.priority or 5;
}) paths);
preferLocalBuild = true;
}
''
${perl}/bin/perl -w ${./builder.pl}
eval "$postBuild"
''