diff options
Diffstat (limited to 'third_party/nix/corepkgs/fetchurl.nix')
-rw-r--r-- | third_party/nix/corepkgs/fetchurl.nix | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/third_party/nix/corepkgs/fetchurl.nix b/third_party/nix/corepkgs/fetchurl.nix new file mode 100644 index 000000000000..a84777f57448 --- /dev/null +++ b/third_party/nix/corepkgs/fetchurl.nix @@ -0,0 +1,41 @@ +{ system ? "" # obsolete +, url +, hash ? "" # an SRI ash + +# Legacy hash specification +, md5 ? "", sha1 ? "", sha256 ? "", sha512 ? "" +, outputHash ? + if hash != "" then hash else if sha512 != "" then sha512 else if sha1 != "" then sha1 else if md5 != "" then md5 else sha256 +, outputHashAlgo ? + if hash != "" then "" else if sha512 != "" then "sha512" else if sha1 != "" then "sha1" else if md5 != "" then "md5" else "sha256" + +, executable ? false +, unpack ? false +, name ? baseNameOf (toString url) +}: + +derivation { + builder = "builtin:fetchurl"; + + # New-style output content requirements. + inherit outputHashAlgo outputHash; + outputHashMode = if unpack || executable then "recursive" else "flat"; + + inherit name url executable unpack; + + system = "builtin"; + + # No need to double the amount of network traffic + preferLocalBuild = true; + + 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" + ]; + + # To make "nix-prefetch-url" work. + urls = [ url ]; +} |