nixpkgs/pkgs/build-support/fetchurl/default.nix
Eelco Dolstra bb93fa69fa * fetchurl: use standard proxy-related variables from the caller such
as `http_proxy'.

svn path=/nixpkgs/trunk/; revision=5347
2006-05-31 09:52:39 +00:00

33 lines
1.1 KiB
Nix

# Argh, this thing is duplicated (more-or-less) in Nix (in corepkgs).
# Need to find a way to combine them.
{stdenv, curl}: # Note that `curl' may be `null', in case of the native stdenv.
{url, outputHash ? "", outputHashAlgo ? "", md5 ? "", sha1 ? "", sha256 ? ""}:
assert (outputHash != "" && outputHashAlgo != "")
|| md5 != "" || sha1 != "" || sha256 != "";
stdenv.mkDerivation {
name = baseNameOf (toString url);
builder = ./builder.sh;
buildInputs = [curl];
# Compatibility with Nix <= 0.7.
id = md5;
# New-style output content requirements.
outputHashAlgo = if outputHashAlgo != "" then outputHashAlgo else
if sha256 != "" then "sha256" else if sha1 != "" then "sha1" else "md5";
outputHash = if outputHash != "" then outputHash else
if sha256 != "" then sha256 else if sha1 != "" then sha1 else md5;
inherit url;
# 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.
impureEnvVars = ["http_proxy" "https_proxy" "ftp_proxy" "all_proxy" "no_proxy"];
}