lib/fetchers.nix: factor out impure proxy vars (#18702)

Apparently everyone just copied those variables, instead of creating a library constant for them. Some even removed the comment. -.-
2016-09-17 21:50:01 +02:00
parent aa7ab01131
commit 61462c94e6
14 changed files with 29 additions and 72 deletions
@@ -0,0 +1,12 @@
+# snippets that can be shared by mutliple fetchers (pkgs/build-support)
+{
+
+  proxyImpureEnvVars = [
+    # 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"
+  ];
+
+}