Merge pull request fractalide#1 from sjmackenzie/master

Problem: no initial framework for xin - equivalent hello world app

default.nix

@@ -0,0 +1,24 @@
+{ racket2nix ? import ./racket2nix {}
+}:
+
+with racket2nix;
+
+let
+src = (builtins.filterSource (path: type:
+  let basePath = baseNameOf path; in
+  (type != "symlink" || null == builtins.match "result.*" basePath) &&
+  (null == builtins.match ".*[.]nix" basePath) &&
+  (null == builtins.match "[.].*[.]swp" basePath) &&
+  (null == builtins.match "[.][#].*" basePath) &&
+  (null == builtins.match "[#].*[#]" basePath) &&
+  (null == builtins.match ".*~" basePath)
+) ./src);
+attrs = rec {
+  catalog = buildRacketCatalog [
+    src
+  ];
+   xin = buildRacket { package = src; inherit catalog; };
+};
+in
+
+attrs.xin // attrs

info.rkt

@@ -0,0 +1,10 @@
+#lang info
+(define collection "xin")
+(define deps '("base"  "typed-map-lib" "typed-racket-more" "redex-lib"))
+(define build-deps '())
+(define scribblings '())
+(define pkg-desc "a configuration language, like a typed nix or a dhall with fixpoint recursion and reflection")
+(define version "0.0")
+(define pkg-authors '("[email protected]"))
+(define racket-launcher-names '("xin"))
+(define racket-launcher-libraries '("src/main.rkt"))

racket2nix/bump-racket2nix.sh

@@ -0,0 +1,44 @@
+#! /usr/bin/env nix-shell
+#! nix-shell -i bash -p bash findutils gawk git nix-prefetch-git
+
+set -e
+set -u
+set -o pipefail
+
+owner=fractalide
+repo=racket2nix
+branch=master
+
+SCRIPT_NAME=${BASH_SOURCE[0]##*/}
+
+cd "${BASH_SOURCE[0]%$SCRIPT_NAME}"
+
+if (( $# > 1 )); then
+  echo "Usage: $SCRIPT_NAME [revision]"
+  exit 2
+fi
+
+if (( $# == 1 )); then
+  rev=$1
+else
+  rev=$(git ls-remote https://github.com/$owner/$repo |
+          awk "/$branch/"' { print $1 }')
+fi
+
+sha256=$(nix-prefetch-git --no-deepClone https://github.com/$owner/$repo.git $rev |
+           awk -F '"'  '/sha256/ { print $4 }')
+
+tee default.nix.new <<EOF
+let
+  bootPkgs = import <nixpkgs> {};
+  pinnedPkgs = bootPkgs.fetchFromGitHub {
+    owner = "$owner";
+    repo = "$repo";
+    rev = "$rev";
+    sha256 = "$sha256";
+  };
+in
+import pinnedPkgs
+EOF
+
+mv default.nix{.new,}

racket2nix/default.nix

@@ -0,0 +1,10 @@
+let
+  bootPkgs = import <nixpkgs> {};
+  pinnedPkgs = bootPkgs.fetchFromGitHub {
+    owner = "fractalide";
+    repo = "racket2nix";
+    rev = "8bce4cc234a6f2a327b61bb4c28f843cec90f550";
+    sha256 = "095fpa1ipiwx4f67awggxnv8jfhnl1907gqvx45sj5lyw7mfskwk";
+  };
+in
+import pinnedPkgs

src/main.rkt

@@ -0,0 +1 @@
+(define hello-world "helloworld")