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authortv <tv@krebsco.de>2018-06-12 20:08:24 +0200
committertv <tv@krebsco.de>2018-06-12 20:08:24 +0200
commit394590c4b35edbfbb5a503923fed0c8cbb382410 (patch)
treecff9ff9e975c64a5f390fdd7f1abfffdf1861434
import writers from stockholm 0bc2409
-rw-r--r--lib/default.nix24
-rw-r--r--lib/types.nix23
-rw-r--r--pkgs/default.nix318
3 files changed, 365 insertions, 0 deletions
diff --git a/lib/default.nix b/lib/default.nix
new file mode 100644
index 0000000..01d43f7
--- /dev/null
+++ b/lib/default.nix
@@ -0,0 +1,24 @@
+let {
+ body = lib;
+
+ lib = nixpkgs.lib // builtins // (with lib; {
+ genAttrs' = names: f: listToAttrs (map f names);
+ getAttrs = names: set:
+ listToAttrs (map (name: nameValuePair name set.${name})
+ (filter (flip hasAttr set) names));
+ toC = x: let
+ type = typeOf x;
+ reject = throw "cannot convert ${type}";
+ in {
+ list = "{ ${concatStringsSep ", " (map toC x)} }";
+ null = "NULL";
+ set = if isDerivation x then toJSON x else reject;
+ string = toJSON x; # close enough
+ }.${type} or reject;
+ test = re: x: isString x && testString re x;
+ testString = re: x: match re x != null;
+ types = nixpkgs.lib.types // import ./types.nix { lib = body; };
+ });
+
+ nixpkgs.lib = import <nixpkgs/lib>;
+}
diff --git a/lib/types.nix b/lib/types.nix
new file mode 100644
index 0000000..197633e
--- /dev/null
+++ b/lib/types.nix
@@ -0,0 +1,23 @@
+{ lib, ... }:
+with lib;
+rec {
+ # POSIX.1‐2013, 3.2 Absolute Pathname
+ absolute-pathname = mkOptionType {
+ name = "POSIX absolute pathname";
+ check = x: isString x && substring 0 1 x == "/" && pathname.check x;
+ merge = mergeOneOption;
+ };
+
+ file-mode = mkOptionType {
+ name = "file mode";
+ check = test "[0-7]{4}";
+ merge = mergeOneOption;
+ };
+
+ # POSIX.1‐2013, 3.278 Portable Filename Character Set
+ filename = mkOptionType {
+ name = "POSIX filename";
+ check = test "([0-9A-Za-z._])[0-9A-Za-z._-]*";
+ merge = mergeOneOption;
+ };
+}
diff --git a/pkgs/default.nix b/pkgs/default.nix
new file mode 100644
index 0000000..ea98bd7
--- /dev/null
+++ b/pkgs/default.nix
@@ -0,0 +1,318 @@
+with import ../lib;
+
+pkgs: oldpkgs: {
+ execve = name: { filename, argv ? null, envp ? {}, destination ? "" }:
+ 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, check ? null }: name: text:
+ assert (with types; either absolute-pathname filename).check name;
+ pkgs.write (baseNameOf name) {
+ ${optionalString (types.absolute-pathname.check name) name} = {
+ inherit check;
+ executable = true;
+ text = "#! ${interpreter}\n${text}";
+ };
+ };
+
+ write = name: specs0:
+ let
+ env = filevars // { passAsFile = attrNames filevars; };
+
+ files = map write' specs;
+
+ filevars = genAttrs' (filter (hasAttr "var") files)
+ (spec: nameValuePair spec.var spec.val);
+
+ 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;
+
+ writers.link =
+ { path
+ , link
+ }:
+ assert path == "" || types.absolute-pathname.check path;
+ assert types.package.check link;
+ {
+ install = /* sh */ ''
+ ${optionalString (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"]);
+ in
+ # Use a subshell because <nixpkgs/stdenv/generic/setup.sh>'s genericBuild
+ # sources (or evaluates) the buildCommand and we don't want to modify its
+ # shell. In particular, exitHandler breaks in multiple ways with set -u.
+ pkgs.runCommand name env /* sh */ ''
+ (
+ set -efu
+ ${concatMapStringsSep "\n" (getAttr "install") files}
+ )
+ '';
+
+ writeBash = name: text:
+ assert (with types; either absolute-pathname filename).check name;
+ pkgs.write (baseNameOf name) {
+ ${optionalString (types.absolute-pathname.check name) name} = {
+ 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; [
+ # TODO remove if everyone migrated to 18.03
+ (if hasAttr "binutils-unwrapped" pkgs then binutils-unwrapped else binutils)
+ coreutils
+ gcc
+ ])}
+ exe=$out${destination}
+ mkdir -p "$(dirname "$exe")"
+ gcc -O -Wall -o "$exe" -x c "$textPath"
+ strip --strip-unneeded "$exe"
+ '';
+
+ writeDash = pkgs.makeScriptWriter {
+ interpreter = "${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" $out
+ '';
+
+ writeHaskell =
+ k:
+ let
+ k' = parseDrvName k;
+ name = k'.name;
+ version = if k'.version != "" then k'.version else "0";
+ in
+ { base-depends ? ["base"]
+ , executables ? {}
+ , ghc-options ? ["-Wall" "-O3" "-threaded" "-rtsopts"]
+ , haskellPackages ? pkgs.haskellPackages
+ , library ? null
+ , license ? "WTFPL"
+ }:
+ let
+ isExecutable = executables != {};
+ isLibrary = library != null;
+
+ cabal-file = pkgs.writeText "${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.write (baseNameOf name) {
+ ${optionalString (types.absolute-pathname.check name) name} = {
+ check = pkgs.writeDash "jqcheck.sh" ''
+ exec ${pkgs.jq}/bin/jq -f "$1" < /dev/null
+ '';
+ inherit text;
+ };
+ };
+
+ writeJSON = name: value: pkgs.runCommand name {
+ json = toJSON value;
+ passAsFile = [ "json" ];
+ } /* sh */ ''
+ ${pkgs.jq}/bin/jq . "$jsonPath" > "$out"
+ '';
+
+ writeNixFromCabal =
+ trace (toString [
+ "The function `writeNixFromCabal` has been deprecated in favour of"
+ "`writeHaskell`."
+ ])
+ (name: path: pkgs.runCommand name {} /* sh */ ''
+ ${pkgs.cabal2nix}/bin/cabal2nix ${path} > $out
+ '');
+
+ writePython2 = deps:
+ let
+ py = pkgs.python2.withPackages(ps: attrVals deps ps);
+ in
+ pkgs.makeScriptWriter {
+ interpreter = "${py}/bin/python";
+ check = pkgs.writeDash "python2check.sh" ''
+ exec ${pkgs.python2Packages.flake8}/bin/flake8 --show-source "$1"
+ '';
+ };
+
+ writePython2Bin = d: name:
+ pkgs.writePython2 d "/bin/${name}";
+
+ writePython3 = deps:
+ let
+ py = pkgs.python3.withPackages(ps: attrVals deps ps);
+ in
+ pkgs.makeScriptWriter {
+ interpreter = "${py}/bin/python";
+ check = pkgs.writeDash "python3check.sh" ''
+ exec ${pkgs.python3Packages.flake8}/bin/flake8 --show-source "$1"
+ '';
+ };
+
+ writePython3Bin = d: name:
+ pkgs.writePython3 d "/bin/${name}";
+
+ writeSed = pkgs.makeScriptWriter {
+ interpreter = "${pkgs.gnused}/bin/sed -f";
+ };
+}