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|
{ config, pkgs, ... }:
with config.krebs.lib;
rec {
execve = name: { filename, argv ? null, envp ? {}, destination ? "" }: let
in writeC name { inherit destination; } ''
#include <unistd.h>
static char *const filename = ${toC filename};
${if argv == null
then /* Propagate arguments */ ''
#define MAIN_ARGS int argc, char **argv
''
else /* Provide fixed arguments */ ''
#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 {} ''
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" ];
} ''
# 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" ''
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 "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
, ... }: ''
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
, ... }: ''
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 "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" {} ''
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 {} ''
${pkgs.cabal2nix}/bin/cabal2nix ${path} > $out
'');
}
|
