Hi, how do we get all packages using a derivation (e.g. python27) either directly or indirectly?
Current failing approach: 1. generate dependency graph with nix-instantiate (see below) 2. query that graph with xmlstarlet It seems that nix-instantiate does this not only for one (x86_64), but all possible systems and even twice for x86_64, once stdenv has glibc the other time it is null. Here an error from the mingw import, which fails on x86_64: % nix-instantiate --show-trace --eval-only --strict --attr pkgs --xml nixpkgs/default.nix > /tmp/pkgs.xml error: while evaluating the builtin function `derivationStrict': while instantiating the derivation named `stdenv-mingw' at `/home/cfl/dev/nixos/nixpkgs/pkgs/stdenv/mingw/default.nix:73:11': while evaluating the derivation attribute `gcc' at `/home/cfl/dev/nixos/nixpkgs/pkgs/stdenv/mingw/default.nix:82:11': while evaluating the builtin function `getAttr': while evaluating the builtin function `derivationStrict': while instantiating the derivation named `gcc-full-4.4.0-mingw32' at `/home/cfl/dev/nixos/nixpkgs/pkgs/stdenv/mingw/pkgs/default.nix:50:7': while evaluating the derivation attribute `src' at `/home/cfl/dev/nixos/nixpkgs/pkgs/stdenv/mingw/pkgs/default.nix:52:7': while evaluating the builtin function `getAttr': while evaluating the builtin function `derivationStrict': while instantiating the derivation named `gcc-full-4.4.0-mingw32-bin-2.tar.gz' at `/home/cfl/dev/nixos/nixpkgs/pkgs/stdenv/mingw/fetchurl/default.nix:9:3': while evaluating the derivation attribute `chmod' at `/home/cfl/dev/nixos/nixpkgs/pkgs/stdenv/mingw/fetchurl/default.nix:21:10': while evaluating the function at `/home/cfl/dev/nixos/nixpkgs/pkgs/stdenv/mingw/cygpath/default.nix:1:11': while evaluating the builtin function `import': cannot import `/nix/store/l2x5avg1ifybjbx5imb0jcc0p0ica13k-cygpath', since path `/nix/store/mz4jgmj9gxq2dmxv6sraz49aq7g9xa6z-cygpath.drv' is not valid Is there a better way to get reverse dependencies? How can we instantiate for only one system? Motivation: we make changes to python packaging and would like to build all derivations that are affected and write tests whether bindings are correctly built and loadable. regards cillian joachim florian -- Florian Friesdorf <[email protected]> GPG FPR: 7A13 5EEE 1421 9FC2 108D BAAF 38F8 99A3 0C45 F083 Jabber/XMPP: [email protected] IRC: chaoflow on freenode,ircnet,blafasel,OFTC
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