{ config, pkgs, ... }: with config.krebs.lib; rec { execve = name: { filename, argv ? null, envp ? {}, destination ? "" }: let in writeC name { inherit destination; } /* c */ '' #include <unistd.h> static char *const filename = ${toC filename}; ${if argv == null then /* Propagate arguments */ /* c */ '' #define MAIN_ARGS int argc, char **argv '' else /* Provide fixed arguments */ /* c */ '' #define MAIN_ARGS void static char *const argv[] = ${toC (argv ++ [null])}; ''} static char *const envp[] = ${toC ( mapAttrsToList (k: v: "${k}=${v}") envp ++ [null] )}; int main (MAIN_ARGS) { execve(filename, argv, envp); return -1; } ''; execveBin = name: cfg: execve name (cfg // { destination = "/bin/${name}"; }); makeScriptWriter = interpreter: name: text: assert (with types; either absolute-pathname filename).check name; pkgs.writeOut (baseNameOf name) { ${optionalString (types.absolute-pathname.check name) name} = { executable = true; text = "#! ${interpreter}\n${text}"; }; }; writeBash = makeScriptWriter "${pkgs.bash}/bin/bash"; writeBashBin = name: assert types.filename.check name; pkgs.writeBash "/bin/${name}"; writeC = name: { destination ? "" }: src: pkgs.runCommand name {} /* sh */ '' PATH=${makeBinPath (with pkgs; [ binutils coreutils gcc ])} src=${pkgs.writeText "${name}.c" src} exe=$out${destination} mkdir -p "$(dirname "$exe")" gcc -O -Wall -o "$exe" $src strip --strip-unneeded "$exe" ''; writeDash = makeScriptWriter "${pkgs.dash}/bin/dash"; writeDashBin = name: assert types.filename.check name; pkgs.writeDash "/bin/${name}"; writeEximConfig = name: text: pkgs.runCommand name { inherit text; passAsFile = [ "text" ]; } /* sh */ '' # TODO validate exim config even with config.nix.useChroot == true # currently doing so will fail because "user exim was not found" #${pkgs.exim}/bin/exim -C "$textPath" -bV >/dev/null mv "$textPath" $out ''; writeOut = name: specs0: let specs = mapAttrsToList (path0: spec0: rec { path = guard { type = types.pathname; value = path0; }; var = "file_${hashString "sha1" path}"; text = spec0.text; executable = guard { type = types.bool; value = spec0.executable or false; }; mode = guard { type = types.file-mode; value = spec0.mode or (if executable then "0755" else "0644"); }; }) specs0; filevars = genAttrs' specs (spec: nameValuePair spec.var spec.text); env = filevars // { passAsFile = attrNames filevars; }; in pkgs.runCommand name env /* sh */ '' set -efu PATH=${makeBinPath [pkgs.coreutils]} ${concatMapStrings (spec: /* sh */ '' install -m ${spec.mode} -D ''$${spec.var}Path $out${spec.path} '') specs} ''; writeHaskell = k: let k' = parseDrvName k; name = k'.name; version = if k'.version != "" then k'.version else "0"; in { base-depends ? ["base"] , executables ? {} , ghc-options ? ["-Wall" "-O3" "-threaded" "-rtsopts"] , haskellPackages ? pkgs.haskellPackages , library ? null , license ? "WTFPL" }: let isExecutable = executables != {}; isLibrary = library != null; cabal-file = pkgs.writeText "${name}-${version}.cabal" /* cabal */ '' build-type: Simple cabal-version: >= 1.2 name: ${name} version: ${version} ${concatStringsSep "\n" (mapAttrsToList exe-section executables)} ${optionalString isLibrary (lib-section library)} ''; exe-install = exe-name: { file ? pkgs.writeText "${name}-${exe-name}.hs" text , relpath ? "${exe-name}.hs" , text , ... }: if types.filename.check exe-name then /* sh */ "install -D ${file} $out/${relpath}" else throw "argument ‘exe-name’ is not a ${types.filename.name}"; exe-section = exe-name: { build-depends ? base-depends ++ extra-depends , extra-depends ? [] , file ? pkgs.writeText "${name}-${exe-name}.hs" text , relpath ? "${exe-name}.hs" , text , ... }: /* cabal */ '' executable ${exe-name} build-depends: ${concatStringsSep "," build-depends} ghc-options: ${toString ghc-options} main-is: ${relpath} ''; get-depends = { build-depends ? base-depends ++ extra-depends , extra-depends ? [] , ... }: build-depends; lib-install = { exposed-modules , ... }: concatStringsSep "\n" (mapAttrsToList mod-install exposed-modules); lib-section = { build-depends ? base-depends ++ extra-depends , extra-depends ? [] , exposed-modules , ... }: /* cabal */ '' library build-depends: ${concatStringsSep "," build-depends} ghc-options: ${toString ghc-options} exposed-modules: ${concatStringsSep "," (attrNames exposed-modules)} ''; mod-install = mod-name: { file ? pkgs.writeText "${name}-${mod-name}.hs" text , relpath ? "${replaceStrings ["."] ["/"] mod-name}.hs" , text , ... }: if types.haskell.modid.check mod-name then /* sh */ "install -D ${file} $out/${relpath}" else throw "argument ‘mod-name’ is not a ${types.haskell.modid.name}"; in haskellPackages.mkDerivation { inherit isExecutable isLibrary license version; executableHaskellDepends = attrVals (concatMap get-depends (attrValues executables)) haskellPackages; libraryHaskellDepends = attrVals (optionals isLibrary (get-depends library)) haskellPackages; pname = name; src = pkgs.runCommand "${name}-${version}-src" {} /* sh */ '' install -D ${cabal-file} $out/${cabal-file.name} ${optionalString isLibrary (lib-install library)} ${concatStringsSep "\n" (mapAttrsToList exe-install executables)} ''; }; writeNixFromCabal = trace (toString [ "The function `writeNixFromCabal` has been deprecated in favour of" "`writeHaskell`." ]) (name: path: pkgs.runCommand name {} /* sh */ '' ${pkgs.cabal2nix}/bin/cabal2nix ${path} > $out ''); }