315 lines
10 KiB
Nix
315 lines
10 KiB
Nix
pkgs: oldpkgs:
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with import <stockholm/lib>;
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{
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execve = name: { filename, argv ? null, envp ? {}, destination ? "" }: let
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in pkgs.writeC name { inherit destination; } /* c */ ''
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#include <unistd.h>
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static char *const filename = ${toC filename};
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${if argv == null
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then /* Propagate arguments */ /* c */ ''
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#define MAIN_ARGS int argc, char **argv
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''
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else /* Provide fixed arguments */ /* c */ ''
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#define MAIN_ARGS void
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static char *const argv[] = ${toC (argv ++ [null])};
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''}
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static char *const envp[] = ${toC (
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mapAttrsToList (k: v: "${k}=${v}") envp ++ [null]
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)};
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int main (MAIN_ARGS) {
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execve(filename, argv, envp);
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return -1;
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}
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'';
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execveBin = name: cfg:
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pkgs.execve name (cfg // { destination = "/bin/${name}"; });
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makeScriptWriter = { interpreter, check ? null }: name: text:
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assert (with types; either absolute-pathname filename).check name;
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pkgs.writeOut (baseNameOf name) {
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${optionalString (types.absolute-pathname.check name) name} = {
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inherit check;
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executable = true;
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text = "#! ${interpreter}\n${text}";
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};
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};
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writeBash = name: text:
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assert (with types; either absolute-pathname filename).check name;
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pkgs.writeOut (baseNameOf name) {
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${optionalString (types.absolute-pathname.check name) name} = {
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check = pkgs.writeDash "shellcheck.sh" ''
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${pkgs.haskellPackages.ShellCheck}/bin/shellcheck "$1" || :
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'';
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executable = true;
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text = "#! ${pkgs.bash}/bin/bash\n${text}";
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};
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};
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writeBashBin = name:
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assert types.filename.check name;
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pkgs.writeBash "/bin/${name}";
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writeC = name: { destination ? "" }: text: pkgs.runCommand name {
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inherit text;
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passAsFile = [ "text" ];
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} /* sh */ ''
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PATH=${makeBinPath (with pkgs; [
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binutils
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coreutils
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gcc
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])}
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exe=$out${destination}
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mkdir -p "$(dirname "$exe")"
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gcc -O -Wall -o "$exe" -x c "$textPath"
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strip --strip-unneeded "$exe"
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'';
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writeDash = pkgs.makeScriptWriter {
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interpreter = "${pkgs.dash}/bin/dash";
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};
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writeDashBin = name:
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assert types.filename.check name;
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pkgs.writeDash "/bin/${name}";
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writeEximConfig = name: text: pkgs.runCommand name {
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inherit text;
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passAsFile = [ "text" ];
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} /* sh */ ''
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# TODO validate exim config even with config.nix.useChroot == true
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# currently doing so will fail because "user exim was not found"
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#${pkgs.exim}/bin/exim -C "$textPath" -bV >/dev/null
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mv "$textPath" $out
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'';
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writeOut = name: specs0:
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let
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writers.link =
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{ path
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, link
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}:
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assert path == "" || types.absolute-pathname.check path;
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assert types.package.check link;
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{
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install = /* sh */ ''
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${optionalString (path != "") /* sh */ ''
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${pkgs.coreutils}/bin/mkdir -p $out${dirOf path}
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''}
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${pkgs.coreutils}/bin/ln -s ${link} $out${path}
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'';
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};
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writers.text =
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{ path
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, check ? null
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, executable ? false
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, mode ? if executable then "0755" else "0644"
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, text
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}:
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assert path == "" || types.absolute-pathname.check path;
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assert types.bool.check executable;
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assert types.file-mode.check mode;
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rec {
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var = "file_${hashString "sha1" path}";
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val = text;
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install = /* sh */ ''
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${optionalString (check != null) /* sh */ ''
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${check} ''$${var}Path
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''}
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${pkgs.coreutils}/bin/install \
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-m ${mode} \
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-D \
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''$${var}Path $out${path}
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'';
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};
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write = spec: writers.${spec.type} (removeAttrs spec ["type"]);
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specs =
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mapAttrsToList
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(path: spec: let
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known-types = [ "link" "text" ];
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found-types = attrNames (getAttrs known-types spec);
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type = assert length found-types == 1; head found-types;
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in spec // { inherit path type; })
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specs0;
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files = map write specs;
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filevars = genAttrs' (filter (hasAttr "var") files)
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(spec: nameValuePair spec.var spec.val);
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env = filevars // { passAsFile = attrNames filevars; };
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in
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# Use a subshell because <nixpkgs/stdenv/generic/setup.sh>'s genericBuild
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# sources (or evaluates) the buildCommand and we don't want to modify its
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# shell. In particular, exitHandler breaks in multiple ways with set -u.
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pkgs.runCommand name env /* sh */ ''
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(
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set -efu
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${concatMapStringsSep "\n" (getAttr "install") files}
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)
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'';
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writeHaskell =
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k:
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let
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k' = parseDrvName k;
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name = k'.name;
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version = if k'.version != "" then k'.version else "0";
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in
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{ base-depends ? ["base"]
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, executables ? {}
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, ghc-options ? ["-Wall" "-O3" "-threaded" "-rtsopts"]
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, haskellPackages ? pkgs.haskellPackages
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, library ? null
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, license ? "WTFPL"
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}:
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let
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isExecutable = executables != {};
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isLibrary = library != null;
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cabal-file = pkgs.writeText "${name}-${version}.cabal" /* cabal */ ''
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build-type: Simple
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cabal-version: >= 1.2
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name: ${name}
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version: ${version}
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${concatStringsSep "\n" (mapAttrsToList exe-section executables)}
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${optionalString isLibrary (lib-section library)}
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'';
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exe-install =
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exe-name:
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{ file ? pkgs.writeText "${name}-${exe-name}.hs" text
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, relpath ? "${exe-name}.hs"
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, text
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, ... }:
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if types.filename.check exe-name
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then /* sh */ "install -D ${file} $out/${relpath}"
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else throw "argument ‘exe-name’ is not a ${types.filename.name}";
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exe-section =
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exe-name:
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{ build-depends ? base-depends ++ extra-depends
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, extra-depends ? []
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, file ? pkgs.writeText "${name}-${exe-name}.hs" text
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, relpath ? "${exe-name}.hs"
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, text
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, ... }: /* cabal */ ''
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executable ${exe-name}
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build-depends: ${concatStringsSep "," build-depends}
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ghc-options: ${toString ghc-options}
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main-is: ${relpath}
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'';
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get-depends =
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{ build-depends ? base-depends ++ extra-depends
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, extra-depends ? []
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, ...
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}:
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build-depends;
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lib-install =
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{ exposed-modules
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, ... }:
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concatStringsSep "\n" (mapAttrsToList mod-install exposed-modules);
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lib-section =
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{ build-depends ? base-depends ++ extra-depends
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, extra-depends ? []
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, exposed-modules
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, ... }: /* cabal */ ''
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library
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build-depends: ${concatStringsSep "," build-depends}
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ghc-options: ${toString ghc-options}
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exposed-modules: ${concatStringsSep "," (attrNames exposed-modules)}
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'';
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mod-install =
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mod-name:
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{ file ? pkgs.writeText "${name}-${mod-name}.hs" text
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, relpath ? "${replaceStrings ["."] ["/"] mod-name}.hs"
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, text
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, ... }:
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if types.haskell.modid.check mod-name
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then /* sh */ "install -D ${file} $out/${relpath}"
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else throw "argument ‘mod-name’ is not a ${types.haskell.modid.name}";
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in
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haskellPackages.mkDerivation {
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inherit isExecutable isLibrary license version;
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executableHaskellDepends =
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attrVals
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(concatMap get-depends (attrValues executables))
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haskellPackages;
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libraryHaskellDepends =
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attrVals
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(optionals isLibrary (get-depends library))
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haskellPackages;
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pname = name;
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src = pkgs.runCommand "${name}-${version}-src" {} /* sh */ ''
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install -D ${cabal-file} $out/${cabal-file.name}
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${optionalString isLibrary (lib-install library)}
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${concatStringsSep "\n" (mapAttrsToList exe-install executables)}
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'';
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};
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writeJq = name: text:
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assert (with types; either absolute-pathname filename).check name;
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pkgs.writeOut (baseNameOf name) {
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${optionalString (types.absolute-pathname.check name) name} = {
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check = pkgs.writeDash "jqcheck.sh" ''
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exec ${pkgs.jq}/bin/jq -f "$1" < /dev/null
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'';
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inherit text;
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};
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};
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writeJSON = name: value: pkgs.runCommand name {
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json = toJSON value;
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passAsFile = [ "json" ];
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} /* sh */ ''
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${pkgs.jq}/bin/jq . "$jsonPath" > "$out"
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'';
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writeNixFromCabal =
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trace (toString [
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"The function `writeNixFromCabal` has been deprecated in favour of"
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"`writeHaskell`."
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])
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(name: path: pkgs.runCommand name {} /* sh */ ''
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${pkgs.cabal2nix}/bin/cabal2nix ${path} > $out
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'');
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writePython2 = name: text:
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assert (with types; either absolute-pathname filename).check name;
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pkgs.writeOut (baseNameOf name) {
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${optionalString (types.absolute-pathname.check name) name} = {
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check = pkgs.writeDash "python2check.sh" ''
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exec ${pkgs.python2}/bin/python -m py_compile "$1"
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'';
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inherit text;
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};
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};
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writePython3 = name: text:
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assert (with types; either absolute-pathname filename).check name;
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pkgs.writeOut (baseNameOf name) {
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${optionalString (types.absolute-pathname.check name) name} = {
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check = pkgs.writeDash "python3check.sh" ''
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exec ${pkgs.python3}/bin/python -m py_compile "$textPath"
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'';
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inherit text;
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};
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};
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writeSed = pkgs.makeScriptWriter {
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interpreter = "${pkgs.gnused}/bin/sed -f";
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};
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}
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