golang: build specific version w/ -o flag

I am trying to build the package github.com/go-delve/delve/cmd/dlv@2f13672765fe and have the resulting executable named dlv-dap.

Under older versions of go (pre 1.16) I was able to accomplish this by running the following commands.

• go get github.com/go-delve/delve/cmd/dlv@2f13672765fe
• go build -o dlv-dap github.com/go-delve/delve/cmd/dlv@2f13672765fe

Under v1.17 this no longer works, instead the command go get github.com/go-delve/delve/cmd/dlv@2f13672765fe throws the following error

go: go.mod file not found in current directory or any parent directory.
'go get' is no longer supported outside a module.
To build and install a command, use 'go install' with a version,
like 'go install example.com/cmd@latest'
For more information, see https://golang.org/doc/go-get-install-deprecation
or run 'go help get' or 'go help install'.

Reading the information link provided in the error it seems there is no longer a way to download/build a golang package with a customized name (e.g. -o my_custom_named_executable).

Is my understanding correct or is there another way to accomplish this?

Here are 2 solutions to do what you want:

First solution: go install

This will install the dlv executable to your $GOPATH/bin directory.

go install github.com/go-delve/delve/cmd/dlv@2f13672765fe

Second solution: install from source:

git clone git@github.com:go-delve/delve.git
cd delve
git checkout 2f13672765fe
go build -o dlv ./cmd/dlv

This will build dlv executable to the root of the project.

Run Delve DAP

Use dlv dap subcommand, dlv-dap is just an alias to that.

The name given to the binary is defined in the mod-file. In this case the mod-file contains:

module github.com/go-delve/delve

If you clone the repository using git you can change this to:

module github.com/go-delve/dev-dap

If you now start <pre>go build</pre> the new name will be assigned.