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