nixpkgs/pkgs/build-support/fetchs3/default.nix
zimbatm f7abcb0752
fetchs3: allow to name the derivation output (#39823)
* fetchs3: add configurable name

Change the default from "foo" to the basename of the s3 URL and make it
configurable.

* fetchs3: fix error on missing credentials.session_token

The session token should default to null instead of failing

* fetchs3: make use of the region argument

Set it to null if you don't want to use it

* fetchs3: prefer local build

Fetcher-types spend more time on network than CPU
2018-05-03 11:08:25 +01:00

38 lines
977 B
Nix

{ stdenvNoCC, runCommand, awscli }:
{ s3url
, name ? builtins.baseNameOf s3url
, sha256
, region ? "us-east-1"
, credentials ? null # Default to looking at local EC2 metadata service
, executable ? false
, 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 = stdenvNoCC.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
'')