From e47428d0e2bd314c330356865f9a56234afa7af7 Mon Sep 17 00:00:00 2001
From: Moritz Ulrich <moritz@tarn-vedra.de>
Date: Thu, 9 Oct 2014 20:49:15 +0200
Subject: Infrastructure to build chicken eggs.

---
 pkgs/build-support/fetchegg/builder.sh  |  9 +++++++++
 pkgs/build-support/fetchegg/default.nix | 28 ++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+)
 create mode 100644 pkgs/build-support/fetchegg/builder.sh
 create mode 100644 pkgs/build-support/fetchegg/default.nix

(limited to 'pkgs/build-support')

diff --git a/pkgs/build-support/fetchegg/builder.sh b/pkgs/build-support/fetchegg/builder.sh
new file mode 100644
index 000000000000..204661063090
--- /dev/null
+++ b/pkgs/build-support/fetchegg/builder.sh
@@ -0,0 +1,9 @@
+source $stdenv/setup
+
+header "exporting egg ${eggName} (version $version) into $out"
+
+mkdir -p $out
+chicken-install -r "${eggName}:${version}"
+cp -r ${eggName}/* $out/
+
+stopNest
diff --git a/pkgs/build-support/fetchegg/default.nix b/pkgs/build-support/fetchegg/default.nix
new file mode 100644
index 000000000000..223d2098c770
--- /dev/null
+++ b/pkgs/build-support/fetchegg/default.nix
@@ -0,0 +1,28 @@
+# Fetches a chicken egg from henrietta using `chicken-install -r'
+# See: http://wiki.call-cc.org/chicken-projects/egg-index-4.html
+
+{ stdenv, chicken }:
+{ name, version, md5 ? "", sha256 ? "" }:
+
+stdenv.mkDerivation {
+  name = "chicken-${name}-export";
+  builder = ./builder.sh;
+  buildInputs = [ chicken ];
+
+  outputHashAlgo = if sha256 == "" then "md5" else "sha256";
+  outputHashMode = "recursive";
+  outputHash = if sha256 == "" then md5 else sha256;
+
+  inherit version;
+
+  eggName = name;
+
+  impureEnvVars = [
+    # We borrow these environment variables from the caller to allow
+    # easy proxy configuration.  This is impure, but a fixed-output
+    # derivation like fetchurl is allowed to do so since its result is
+    # by definition pure.
+    "http_proxy" "https_proxy" "ftp_proxy" "all_proxy" "no_proxy"
+  ];
+}
+
-- 
cgit 1.4.1