diff options
Diffstat (limited to 'krebs/5pkgs/writers.nix')
| -rw-r--r-- | krebs/5pkgs/writers.nix | 301 |
1 files changed, 301 insertions, 0 deletions
diff --git a/krebs/5pkgs/writers.nix b/krebs/5pkgs/writers.nix new file mode 100644 index 000000000..fe8fe5d72 --- /dev/null +++ b/krebs/5pkgs/writers.nix @@ -0,0 +1,301 @@ +{ pkgs, ... }: +with import <stockholm/lib>; +{ + nixpkgs.config.packageOverrides = _: { + execve = name: { filename, argv ? null, envp ? {}, destination ? "" }: let + in pkgs.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}=${v}") envp ++ [null] + )}; + + int main (MAIN_ARGS) { + execve(filename, argv, envp); + return -1; + } + ''; + + execveBin = name: cfg: + pkgs.execve name (cfg // { destination = "/bin/${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 = name: text: + assert (with types; either absolute-pathname filename).check name; + pkgs.writeOut (baseNameOf name) { + ${optionalString (types.absolute-pathname.check name) name} = { + check = pkgs.writeDash "shellcheck.sh" '' + ${pkgs.haskellPackages.ShellCheck}/bin/shellcheck "$1" || : + ''; + executable = true; + text = "#! ${pkgs.bash}/bin/bash\n${text}"; + }; + }; + + writeBashBin = name: + assert types.filename.check name; + pkgs.writeBash "/bin/${name}"; + + writeC = name: { destination ? "" }: text: pkgs.runCommand name { + inherit text; + passAsFile = [ "text" ]; + } /* sh */ '' + PATH=${makeBinPath (with pkgs; [ + binutils + coreutils + gcc + ])} + exe=$out${destination} + mkdir -p "$(dirname "$exe")" + gcc -O -Wall -o "$exe" -x c "$textPath" + strip --strip-unneeded "$exe" + ''; + + writeDash = pkgs.makeScriptWriter "${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 + writers.link = + { path + , link + }: + assert path == "" || types.absolute-pathname.check path; + assert types.package.check link; + { + install = /* sh */ '' + ${optionalString (dirOf path != "/") /* sh */ '' + ${pkgs.coreutils}/bin/mkdir -p $out${dirOf path} + ''} + ${pkgs.coreutils}/bin/ln -s ${link} $out${path} + ''; + }; + + writers.text = + { path + , check ? null + , executable ? false + , mode ? if executable then "0755" else "0644" + , text + }: + assert path == "" || types.absolute-pathname.check path; + assert types.bool.check executable; + assert types.file-mode.check mode; + rec { + var = "file_${hashString "sha1" path}"; + val = text; + install = /* sh */ '' + ${optionalString (check != null) /* sh */ '' + ${check} ''$${var}Path + ''} + ${pkgs.coreutils}/bin/install \ + -m ${mode} \ + -D \ + ''$${var}Path $out${path} + ''; + }; + + write = spec: writers.${spec.type} (removeAttrs spec ["type"]); + + specs = + mapAttrsToList + (path: spec: let + known-types = [ "link" "text" ]; + found-types = attrNames (getAttrs known-types spec); + type = assert length found-types == 1; head found-types; + in spec // { inherit path type; }) + specs0; + + files = map write specs; + + filevars = genAttrs' (filter (hasAttr "var") files) + (spec: nameValuePair spec.var spec.val); + + env = filevars // { passAsFile = attrNames filevars; }; + in + pkgs.runCommand name env /* sh */ '' + set -efu + ${concatMapStringsSep "\n" (getAttr "install") files} + ''; + + writeHaskell = + k: + let + k' = parseDrvName k; + name = k'.name; + version = if k'.version != "" then k'.version else "0"; + in + { base-depends ? ["base"] + , executables ? {} + , ghc-options ? ["-Wall" "-O3" "-threaded" "-rtsopts"] + , haskellPackages ? pkgs.haskellPackages + , library ? null + , license ? "WTFPL" + }: + let + isExecutable = executables != {}; + isLibrary = library != null; + + cabal-file = pkgs.writeText "${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)} + ''; + }; + + writeJq = name: text: + assert (with types; either absolute-pathname filename).check name; + pkgs.writeOut (baseNameOf name) { + ${optionalString (types.absolute-pathname.check name) name} = { + check = pkgs.writeDash "jqcheck.sh" '' + exec ${pkgs.jq}/bin/jq -f "$1" -n + ''; + inherit text; + }; + }; + + writeJSON = name: value: pkgs.writeText name (toJSON value); + + 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 + ''); + + writePython2 = name: text: + assert (with types; either absolute-pathname filename).check name; + pkgs.writeOut (baseNameOf name) { + ${optionalString (types.absolute-pathname.check name) name} = { + check = pkgs.writeDash "python2check.sh" '' + exec ${pkgs.python2}/bin/python -m py_compile "$1" + ''; + inherit text; + }; + }; + + writePython3 = name: text: + assert (with types; either absolute-pathname filename).check name; + pkgs.writeOut (baseNameOf name) { + ${optionalString (types.absolute-pathname.check name) name} = { + check = pkgs.writeDash "python3check.sh" '' + exec ${pkgs.python3}/bin/python -m py_compile "$textPath" + ''; + inherit text; + }; + }; + + writeSed = pkgs.makeScriptWriter "${pkgs.gnused}/bin/sed -f"; + }; +} |