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{ lib, runCommand, awscli }:
{ s3url
, name ? builtins.baseNameOf s3url
, sha256
, region ? "us-east-1"
, credentials ? null # Default to looking at local EC2 metadata service
, recursiveHash ? false
, postFetch ? null
}:
let
mkCredentials = { access_key_id, secret_access_key, session_token ? null }: {
AWS_ACCESS_KEY_ID = access_key_id;
AWS_SECRET_ACCESS_KEY = secret_access_key;
AWS_SESSION_TOKEN = session_token;
};
credentialAttrs = lib.optionalAttrs (credentials != null) (mkCredentials credentials);
in runCommand name ({
nativeBuildInputs = [ awscli ];
outputHashAlgo = "sha256";
outputHash = sha256;
outputHashMode = if recursiveHash then "recursive" else "flat";
preferLocalBuild = true;
AWS_DEFAULT_REGION = region;
} // credentialAttrs) (if postFetch != null then ''
downloadedFile="$(mktemp)"
aws s3 cp ${s3url} $downloadedFile
${postFetch}
'' else ''
aws s3 cp ${s3url} $out
'')
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