Golang Cloud Function failed deployment missing dot in first path element

Question

I tried to deploy Golang Project with module = mymodule, but failed with below error

Deployment failure:
Build failed: {"error":{"buildpackId":"google.go.functions-framework","buildpackVersion":"0.9.0","errorType":13,"canonicalCode":13,"errorId":"131fbb9d"
,"errorMessage":"go mod: [email protected]: invalid path: malformed module path \"mymodule\":
missing dot in first path element"},"stats":null}

If I rename the mymodule to have dot within it, e.g. mymodule.test , then it fails in my local as it tried to fetch it externally from https://mymodule.test which does not exist

Thanks in advance

Can you provide reproducible steps so I could test it from my side? — llompalles
– llompalles, Commented May 18, 2020 at 14:40

guillaume blaquiere · Accepted Answer · 2020-05-17 18:43:05Z

3

You can define in your go.mod file a local module, like this

require mymodule.test v0.0.0

replace mymodule.test v0.0.0=> ./path/to/mymodule

answered May 17, 2020 at 18:43

guillaume blaquiere

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3 Comments

iwan Over a year ago

Thanks a lot for the suggestion. I tried to use replace for some reason it tries to fetch from GOROOT folder instead of project root folder, hence returns another error cmd\main.go:13:2: package //mymodule.test/graph/resolvers is not in GOROOT (c:\go\src\mymodule.test\graph\resolvers)

guillaume blaquiere Over a year ago

Can you share your project structure?

iwan Over a year ago

After putting replace mymodule.test => ./ in the last line of go.mod, and modify all other places to use mymodule.test , I was able to deploy in GCP, many thanks

Community · Accepted Answer · 2020-06-20 09:12:55Z

0

A Go module name will be interpreted as a URL from which the given project is available. You have to name your module by your project's URL. E.g. github.com/iwan/yourproject, assuming your project is under github.com/iwan/yourproject.

Reason

When you publish your go module and it is being built into gcloud, your module will be imported (see the error message: go mod: [email protected]). The standard go module import process will verify the checksum of the available module by fetching the contents of https://<your_module_name>@v.0.0.0.

That is why you get a complain about the missing '.', because it tries to make sure you provided a valid URL. And that is why it fails when you named it mymodule.test because the URL, the go module indicates (i.e. https://mymodule.test) is unavailable.

edited Jun 20, 2020 at 9:12

CommunityBot

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answered May 17, 2020 at 15:35

aliras

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1 Comment

iwan Over a year ago

Thank you @aliras. The explanation makes sense for external dependencies. But for the code in the local project i.e. the project module itself (that already available within google cloud source repository) -- probably it should not attempt to interpret the module name as URL

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