forked from mirrors/nixpkgs
104 lines
2.8 KiB
Nix
104 lines
2.8 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.
|
|
|
|
let
|
|
|
|
mirrors = import ./mirrors.nix;
|
|
|
|
# Write the list of mirrors to a file that we can reuse between
|
|
# fetchurl instantiations, instead of passing the mirrors to
|
|
# fetchurl instantiations via environment variables. This makes the
|
|
# resulting store derivations (.drv files) much smaller, which in
|
|
# turn makes nix-env/nix-instantiate faster.
|
|
mirrorsFile =
|
|
stdenv.mkDerivation ({
|
|
name = "mirrors-list";
|
|
builder = ./write-mirror-list.sh;
|
|
} // mirrors);
|
|
|
|
# Names of the master sites that are mirrored (i.e., "sourceforge",
|
|
# "gnu", etc.).
|
|
sites =
|
|
if builtins ? attrNames
|
|
then builtins.attrNames mirrors
|
|
else [] /* backwards compatibility */;
|
|
|
|
in
|
|
|
|
{ # URL to fetch.
|
|
url ? ""
|
|
|
|
, # Alternatively, a list of URLs specifying alternative download
|
|
# locations. They are tried in order.
|
|
urls ? []
|
|
|
|
, # Name of the file. If empty, use the basename of `url' (or of the
|
|
# first element of `urls').
|
|
name ? ""
|
|
|
|
# Different ways of specifying the hash.
|
|
, outputHash ? ""
|
|
, outputHashAlgo ? ""
|
|
, md5 ? ""
|
|
, sha1 ? ""
|
|
, sha256 ? ""
|
|
|
|
, # If set, don't download the file, but write a list of all possible
|
|
# URLs (resulting from resolving mirror:// URLs) to $out.
|
|
showURLs ? false
|
|
}:
|
|
|
|
assert urls != [] -> url == "";
|
|
assert url != "" -> urls == [];
|
|
|
|
assert showURLs || (outputHash != "" && outputHashAlgo != "")
|
|
|| md5 != "" || sha1 != "" || sha256 != "";
|
|
|
|
let
|
|
|
|
urls_ = if urls != [] then urls else [url];
|
|
|
|
in
|
|
|
|
stdenv.mkDerivation {
|
|
name =
|
|
if showURLs then "urls"
|
|
else if name != "" then name
|
|
else baseNameOf (toString (builtins.head urls_));
|
|
|
|
builder = ./builder.sh;
|
|
|
|
buildInputs = [curl];
|
|
|
|
urls = urls_;
|
|
|
|
# If set, prefer the content-addressable mirrors
|
|
# (http://nixos.org/tarballs) over the original URLs.
|
|
preferHashedMirrors = true;
|
|
|
|
# Compatibility with Nix <= 0.7.
|
|
id = md5;
|
|
|
|
# New-style output content requirements.
|
|
outputHashAlgo = if outputHashAlgo != "" then outputHashAlgo else
|
|
if sha256 != "" then "sha256" else if sha1 != "" then "sha1" else "md5";
|
|
outputHash = if outputHash != "" then outputHash else
|
|
if sha256 != "" then sha256 else if sha1 != "" then sha1 else md5;
|
|
|
|
impureEnvVars = [
|
|
# We borrow these environment variables from the caller to allow
|
|
# easy proxy configuration. This is impure, but a fixed-output
|
|
# derivation like fetchurl is allowed to do so since its result is
|
|
# by definition pure.
|
|
"http_proxy" "https_proxy" "ftp_proxy" "all_proxy" "no_proxy"
|
|
|
|
# This variable allows the user to override hashedMirrors from the
|
|
# command-line.
|
|
"NIX_HASHED_MIRRORS"
|
|
] ++ (map (site: "NIX_MIRRORS_${site}") sites);
|
|
|
|
inherit showURLs mirrorsFile;
|
|
}
|