我已经将应用程序的一个版本部署到 GAE，但现在部署新版本时遇到问题。
当我尝试时gcloud app deploy --version=VERSION，我收到一堆错误，显示远程构建找不到我的导入包：
Beginning deployment of service [default]...
Building and pushing image for service [default]
Some files were skipped. Pass `--verbosity=info` to see which ones.
You may also view the gcloud log file, found at
[/home/****/.config/gcloud/logs/2018.04.08/***.log].
Started cloud build [***].
To see logs in the Cloud Console: https://console.cloud.google.com/gcr/builds/****?project=**
------------- REMOTE BUILD OUTPUT --------------------------------------------
starting build "****"
FETCHSOURCE
Fetching storage object: gs://staging.****.appspot.com/us.gcr.io/****/appengine/default.20180408t040210:latest#****
Copying gs://staging.****.appspot.com/us.gcr.io/****/appengine/default.***:latest#***...
/ [1 files][ 6.9 MiB/ 6.9 MiB]
Operation completed over 1 objects/6.9 MiB.
BUILD
Starting Step #0
Step #0: Pulling image: gcr.io/gcp-runtimes/go1builder@sha256:****
Step #0: sha256:***: Pulling from gcp-runtimes/go1-builder
Step #0: Digest: sha256:***
Step #0: Status: Downloaded newer image for gcr.io/gcp-runtimes/go1-builder@sha256:***
Step #0: main.go:5:2: cannot find package "config" in any of:
Step #0: /usr/local/go/src/config (from $GOROOT)
Step #0: /workspace/_gopath/src/config (from $GOPATH)
Step #0: main.go:6:2: cannot find package "db" in any of:
Step #0: /usr/local/go/src/db (from $GOROOT)
Step #0: /workspace/_gopath/src/db (from $GOPATH)
...
Finished Step #0
ERROR
ERROR: build step 0 "gcr.io/gcp-runtimes/go1builder@sha256:***" failed: exit status 1
-------------------------------------------------------------------------------
ERROR: (gcloud.app.deploy) Cloud build failed. Check logs at https://console.cloud.google.com/gcr/builds/***?project=*** Failure status: UNKNOWN: Error Response: [2] Build failed; check build logs for details
我已经尝试了一些关于正确设置 GOPATH 的建议，包括以 root 身份运行命令、sudo -E 以及设置系统范围的 GOPATH，但到目前为止还没有成功。无论我是在 Cloud Shell 中部署还是在本地设置中运行命令，我都会遇到相同的错误集。如果我设置了错误的 GOPATH，那么在进入远程构建阶段之前构建就会失败。我也没有更改第一次部署的源代码结构。
我在这方面花了很多时间，感谢任何帮助或建议。
谢谢。
EDIT:这是我的 app.yaml
runtime: go
env: flex
api_version: go1
env_variables:
APP_DATABASE_CONFIG: "{...}"
APP_CONFIG: "{...}"
也在运行dev_appserver.py app.yaml我得到以下输出：
dev_appserver.py app.yaml
INFO 2018-04-11 05:20:51,040 application_configuration.py:506] No version specified. Generated version id: 20180411t052051
WARNING 2018-04-11 05:20:51,040 application_configuration.py:163] The Managed VMs runtime is deprecated, please consider migrating your application to use the Flexible runtime. See https://cloud.google.com/appengine/docs/flexible/python/migrating for more details.
INFO 2018-04-11 05:20:51,040 devappserver2.py:105] Skipping SDK update check.
INFO 2018-04-11 05:20:51,102 api_server.py:265] Starting API server at: http://localhost:46211
INFO 2018-04-11 05:21:16,233 dispatcher.py:255] Starting module "default" running at: http://localhost:8080
INFO 2018-04-11 05:21:16,234 admin_server.py:152] Starting admin server at: http://localhost:8000
...
除了开头的警告之外，它通常工作正常。我不知道为什么它会给出该警告，尽管我配置了 app.yaml，但如果它有帮助，我部署的第一个实例是一个标准项目（Google 演示项目），我稍后删除了该实例。
我想知道远程端的 GOROOT (/usr/local/go/) 和 GOPATH (/workspace/_gopath/) 从哪里来？这些是默认设置吗？另外，如果有帮助的话，错误消息中显示的那些 db 和配置包是我的，它们位于 project-root/src 下。
app.yaml 位于project-root/src/web 下。我的 GOPATH 设置为项目根目录。我的 GOROOT 是空的。
