Docker build error: 'go get' is no longer supported outside a module

[pf56]

Trying to build the container image fails with the following error:

$ docker build --rm -t copybara .
[+] Building 42.8s (11/20)
 => [internal] load build definition from Dockerfile                                                                              0.0s
 => => transferring dockerfile: 38B                                                                                               0.0s
 => [internal] load .dockerignore                                                                                                 0.0s
 => => transferring context: 2B                                                                                                   0.0s
 => [internal] load metadata for docker.io/library/openjdk:11-jre-slim                                                           21.4s
 => [internal] load metadata for gcr.io/cloud-builders/bazel:latest                                                               0.4s
 => [internal] load metadata for docker.io/library/golang:latest                                                                 42.4s
 => CANCELED [build 1/4] FROM gcr.io/cloud-builders/bazel:latest@sha256:010369291cd04d3edeb102487aed83de16b01ab8bf561b97f07c3d70  0.3s
 => => resolve gcr.io/cloud-builders/bazel:latest@sha256:010369291cd04d3edeb102487aed83de16b01ab8bf561b97f07c3d700103f4f9         0.0s
 => => sha256:3a4bc586ae1cf72174215a09288cc3f6e828a85ff3094dfaf3e112d5b706e02a 4.25kB / 4.25kB                                    0.0s
 => => sha256:3c6ffb290287f2afd118047f8dccb18d07d59d45df5143cc1fcb1396a9da8fbe 0B / 28.56MB                                       0.3s
 => => sha256:fe1dccac7e061acb50b76ef132c27160fa7c9eb7a72507f68012baaea6052803 0B / 6.49MB                                        0.3s
 => => sha256:3c2cba919283a210665e480bcbf943eaaf4ed87a83f02e81bb286b8bdead0e75 0B / 49B                                           0.3s
 => => sha256:010369291cd04d3edeb102487aed83de16b01ab8bf561b97f07c3d700103f4f9 1.78kB / 1.78kB                                    0.0s
 => [internal] load build context                                                                                                 0.0s
 => => transferring context: 56.83kB                                                                                              0.0s
 => [stage-2 1/7] FROM docker.io/library/openjdk:11-jre-slim@sha256:93af7df2308c5141a751c4830e6b6c5717db102b3b31f012ea29d842dc4f  0.0s
 => CACHED [buildtools 1/3] FROM docker.io/library/golang:latest@sha256:d3f734e1f46ec36da8c1bce67cd48536138085289e24cfc8765f483c  0.0s
 => CACHED [stage-2 2/7] WORKDIR /usr/src/app                                                                                     0.0s
 => ERROR [buildtools 2/3] RUN go get github.com/bazelbuild/buildtools/buildozer                                                  0.3s
------
 > [buildtools 2/3] RUN go get github.com/bazelbuild/buildtools/buildozer:
#15 0.322 go: go.mod file not found in current directory or any parent directory.
#15 0.322       'go get' is no longer supported outside a module.
#15 0.322       To build and install a command, use 'go install' with a version,
#15 0.322       like 'go install example.com/cmd@latest'
#15 0.322       For more information, see https://golang.org/doc/go-get-install-deprecation
#15 0.322       or run 'go help get' or 'go help install'.
------
executor failed running [/bin/sh -c go get github.com/bazelbuild/buildtools/buildozer]: exit code: 1

go get seems to be deprecated in favor of go install since Go 1.18.

[mikelalcon]

Should be fixed at #206 . Thanks for reporting!