lix/corepkgs/fetchurl.nix
2013-03-08 01:24:59 +01:00

37 lines
1.2 KiB
Nix

with import <nix/config.nix>;
{system ? builtins.currentSystem, url, outputHash ? "", outputHashAlgo ? "", md5 ? "", sha1 ? "", sha256 ? "", executable ? false}:
assert (outputHash != "" && outputHashAlgo != "")
|| md5 != "" || sha1 != "" || sha256 != "";
let
builder = builtins.toFile "fetchurl.sh"
(''
echo "downloading $url into $out"
${curl} --fail --location --max-redirs 20 --insecure "$url" > "$out"
'' + (if executable then "${coreutils}/chmod +x $out" else ""));
in
derivation {
name = baseNameOf (toString url);
builder = shell;
args = [ "-e" builder ];
# 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;
outputHashMode = if executable then "recursive" else "flat";
inherit system url;
# No need to double the amount of network traffic
preferLocalBuild = true;
# Don't build in a chroot because Nix's dependencies may not be there.
__noChroot = true;
}