76 lines
1.5 KiB
Nix
76 lines
1.5 KiB
Nix
{
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system ? "", # obsolete
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url,
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hash ? "", # an SRI hash
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# Legacy hash specification
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md5 ? "",
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sha1 ? "",
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sha256 ? "",
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sha512 ? "",
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outputHash ?
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if hash != "" then
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hash
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else if sha512 != "" then
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sha512
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else if sha1 != "" then
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sha1
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else if md5 != "" then
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md5
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else
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sha256,
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outputHashAlgo ?
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if hash != "" then
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""
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else if sha512 != "" then
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"sha512"
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else if sha1 != "" then
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"sha1"
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else if md5 != "" then
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"md5"
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else
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"sha256",
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executable ? false,
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unpack ? false,
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name ? baseNameOf (toString url),
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impure ? false,
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}:
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derivation (
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{
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builder = "builtin:fetchurl";
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# New-style output content requirements.
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outputHashMode = if unpack || executable then "recursive" else "flat";
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inherit
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name
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url
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executable
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unpack
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;
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system = "builtin";
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# No need to double the amount of network traffic
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preferLocalBuild = true;
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impureEnvVars = [
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# We borrow these environment variables from the caller to allow
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# easy proxy configuration. This is impure, but a fixed-output
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# derivation like fetchurl is allowed to do so since its result is
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# by definition pure.
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"http_proxy"
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"https_proxy"
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"ftp_proxy"
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"all_proxy"
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"no_proxy"
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];
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# To make "nix-prefetch-url" work.
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urls = [ url ];
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}
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// (if impure then { __impure = true; } else { inherit outputHashAlgo outputHash; })
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)
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