Panic when attempting to generate CLI for YNAB's API

[phrohdoh]

I am attempting to generate a CLI for YNAB's API (spec) via Docker (because I really do not want to setup then tear down a go env for this single use-case).

This isn't straightforward as the YNAB API spec is OpenAPI v2 so I converted it to v3 with this tool (then validated the generated spec with this tool).

I uploaded the resulting v3 YAML as a gist.

I then wrote this, potentially bogus, Dockerfile:

FROM golang

WORKDIR /go/ynab-cli

RUN go get -u github.com/danielgtaylor/openapi-cli-generator && \
    curl --silent -o ynab.openapi.yaml https://gist.githubusercontent.com/Phrohdoh/d1ecea1fbe1c8566fad5fd97aa99b346/raw/962661a47d8248aa2edd3618ad6c74d000219fe4/ynab_v1.openapi_v3.yaml && \
    openapi-cli-generator init ynab && \
    cat main.go | sed 's|// TODO: Add register commands here\.|openapiRegister(false)|g' > main.go

RUN openapi-cli-generator generate ynab.openapi.yaml
RUN go install

CMD ynab-cli

When I run the following from the directory containing my Dockerfile:

$ docker build -t gen-ynab-cli .

I get the following output:

Sending build context to Docker daemon   2.56kB
Step 1/6 : FROM golang
 ---> b860ab44e93e
Step 2/6 : WORKDIR /go/ynab-cli
 ---> Using cache
 ---> dfba7020dd36
Step 3/6 : RUN go get -u github.com/danielgtaylor/openapi-cli-generator &&     curl --silent -o ynab.openapi.yaml https://gist.githubusercontent.com/Phrohdoh/d1ecea1fbe1c8566fad5fd97aa99b346/raw/962661a47d8248aa2edd3618ad6c74d000219fe4/ynab_v1.openapi_v3.yaml &&     openapi-cli-generator init ynab &&     cat main.go | sed 's|// TODO: Add register commands here\.|openapiRegister(false)|g' > main.go &&     cat main.go
 ---> Using cache
 ---> e7a8c5ae42a6
Step 4/6 : RUN openapi-cli-generator generate ynab.openapi.yaml
 ---> Running in 4250354ef5c6
panic: 25:9: expected ';', found '.' (and 10 more errors)

goroutine 1 [running]:
main.writeFormattedFile(0xc000160c00, 0xf, 0xc0002ae000, 0x10af6, 0x12000)
        /go/src/github.com/danielgtaylor/openapi-cli-generator/main.go:586 +0x112
main.generate(0xc0000b7b80, 0xc0000530a0, 0x1, 0x1)
        /go/src/github.com/danielgtaylor/openapi-cli-generator/main.go:654 +0x5b0
github.com/spf13/cobra.(*Command).execute(0xc0000b7b80, 0xc000053080, 0x1, 0x1, 0xc0000b7b80, 0xc000053080)
        /go/src/github.com/spf13/cobra/command.go:766 +0x2ae
github.com/spf13/cobra.(*Command).ExecuteC(0xc0000b7680, 0xc00008df78, 0x1, 0x1)
        /go/src/github.com/spf13/cobra/command.go:850 +0x2fc
github.com/spf13/cobra.(*Command).Execute(...)
        /go/src/github.com/spf13/cobra/command.go:800
main.main()
        /go/src/github.com/danielgtaylor/openapi-cli-generator/main.go:674 +0x1c0
The command '/bin/sh -c openapi-cli-generator generate ynab.openapi.yaml' returned a non-zero code: 2

With the relevant portion being:

panic: 25:9: expected ';', found '.' (and 10 more errors)

goroutine 1 [running]:
main.writeFormattedFile(0xc000160c00, 0xf, 0xc0002ae000, 0x10af6, 0x12000)
        /go/src/github.com/danielgtaylor/openapi-cli-generator/main.go:586 +0x112
main.generate(0xc0000b7b80, 0xc0000530a0, 0x1, 0x1)
        /go/src/github.com/danielgtaylor/openapi-cli-generator/main.go:654 +0x5b0
github.com/spf13/cobra.(*Command).execute(0xc0000b7b80, 0xc000053080, 0x1, 0x1, 0xc0000b7b80, 0xc000053080)
        /go/src/github.com/spf13/cobra/command.go:766 +0x2ae
github.com/spf13/cobra.(*Command).ExecuteC(0xc0000b7680, 0xc00008df78, 0x1, 0x1)
        /go/src/github.com/spf13/cobra/command.go:850 +0x2fc
github.com/spf13/cobra.(*Command).Execute(...)
        /go/src/github.com/spf13/cobra/command.go:800
main.main()
        /go/src/github.com/danielgtaylor/openapi-cli-generator/main.go:674 +0x1c0

Am I attempting to use this project incorrectly or is the generated v3 YAML doc invalid?

Any help/input would be greatly appreciated!

[phrohdoh]

Alright I bit the bullet and set go up locally and was able to reproduce this without Docker being involved at all.

[danielgtaylor]

This is a great question, I'll try to have a look when I get a chance and will need to work on making the output of the CLI a bit friendlier. There is very little generator error handling at this point!

[itdove]

You can pass this error if you run the cmd openapi-cli-generator generate ynab.openapi.yaml by stripping the dot... `openapi-cli-generator generate ynab_openapi_yaml.