Error when using NewFileArchive to create Lambda in Go

[justone]

I'm trying to create a lambda with code that is in a local directory. Here's a snippet:

        lambdaFunction, err := lambda.NewFunction(ctx, "slacker", &lambda.FunctionArgs{
            Runtime: "python3.6",
            Code: asset.NewAssetArchive(map[string]interface{}{
                ".": asset.NewFileArchive("./function.zip"),
            }),
            Timeout: 300,
            Handler: "function.lambda_handler",
            Role:    lambdaRole.Name(),
        })

When I run pulumi up, I get this error message:

Diagnostics:
  global: global
    error: expected an asset, but filename is not an asset

At @swgillespie's request, I changed line 103 of rpc.go from:

rpcTokenSpecialSigKey: rpcTokenSpecialAssetSig,

to:

rpcTokenSpecialSigKey: rpcTokenSpecialArchiveSig,

and that got past the error message.

However, now I get this message:

error: Plan apply failed: creating urn:pulumi:billing-dev::billing::aws:lambda/function:Function::slacker: Error creating Lambda function: InvalidParameterValueException: Uploaded file must be a non-empty zip

I've tried both asset.NewFileArchive("./function") and asset.NewFileArchive("./function.zip"), and the error is the same.

Here's the files on the filesystem:

$ tree function
function
└── function.py

0 directories, 1 file
$ unzip -l function.zip
Archive:  function.zip
  Length      Date    Time    Name
---------  ---------- -----   ----
     2844  2018-09-20 08:56   function.py
---------                     -------
     2844                     1 file

I was able to work around this issue by uploading my code to S3 and using the S3Bucket and S3Key properties.

Any help would be greatly appreciated. Thanks.

[swgillespie]

We should definitely fix rpc.go, that's 100% a bug. There's probably another bug lurking but using rpcTokenSpecialAssetSig to serialize an Archive is definitely a bug.

[swgillespie]

Go support is out of scope for M21.

[EvanBoyle]

We think this may have been fixed. I'll try to create a repro in M31 to verify.

[lukehoban]

Confirmed that this works. There's an example now in the examples repo that does this:

https://github.com/pulumi/examples/blob/1e1720ff87f0cb85dbf12e0840c577953aa35e4a/aws-go-lambda/main.go#L46-L63