为什么这个 Go 构建在 Heroku 上失败了？它在本地构建没有问题

Question

有谁能告诉我为什么这个构建在 heroku 上失败了？

我试过寻找替代包并整理 mod 文件，甚至删除它并重做。

这是我的构建日志

    Overview Resources Deploy Metrics Activity Access Settings
Activity Feed  Build LogID f8e9d5ce-0d8f-4e8e-8b2a-661c4d1f68f7
-----> Building on the Heroku-20 stack
-----> Go app detected
-----> Fetching stdlib.sh.v8... done
-----> 
       Detected go modules via go.mod
-----> 
       Detected Module Name: github.com/xxxxxx/xxxxxx-xxxxxx
-----> 
 !!    The go.mod file for this project does not specify a Go version
 !!    
 !!    Defaulting to go1.12.17
 !!    
 !!    For more details see: https://devcenter.heroku.com/articles/go-apps-with-modules#build-configuration
 !!    
-----> Using go1.12.17
-----> Determining packages to install
       
       Detected the following main packages to install:
            github.com/xxxxxx/xxxxxx-xxxxxx
       
-----> Running: go install -v -tags heroku github.com/xxxxxx/xxxxxx-companion 
github.com/vektah/gqlparser/v2/ast
github.com/agnivade/levenshtein
github.com/mitchellh/mapstructure
github.com/vektah/gqlparser/v2/gqlerror
github.com/99designs/gqlgen/graphql
# github.com/99designs/gqlgen/graphql
../codon/tmp/cache/go-path/pkg/mod/github.com/99designs/gqlgen@v0.13.0/graphql/error.go:21:5: undefined: errors.As
github.com/99designs/gqlgen/graphql/errcode
github.com/vektah/gqlparser/v2/lexer
github.com/hashicorp/golang-lru/simplelru
github.com/vektah/gqlparser/v2/parser
github.com/hashicorp/golang-lru
github.com/gorilla/websocket
github.com/vektah/gqlparser/v2/validator
github.com/99designs/gqlgen/graphql/playground
github.com/xxxxxx/xxxxxx-xxxxxx/graph/model
github.com/xxxxxx/xxxxxx-xxxxxx/database
github.com/99designs/gqlgen/graphql/introspection
github.com/vektah/gqlparser/v2/validator/rules
github.com/go-sql-driver/mysql
github.com/vektah/gqlparser/v2
 !     Push rejected, failed to compile Go app.
 !     Push failed

这是我的 go.mod 文件：

module github.com/xxxxxx/xxxxxx-xxxxxx

go 1.15

require (
    github.com/99designs/gqlgen v0.13.0
    github.com/go-sql-driver/mysql v1.5.0
    github.com/hashicorp/golang-lru v0.5.1 // indirect
    github.com/mitchellh/mapstructure v0.0.0-20180220230111-00c29f56e238 // indirect
    github.com/stretchr/testify v1.5.1 // indirect
    github.com/vektah/gqlparser/v2 v2.1.0
    gopkg.in/yaml.v2 v2.2.8 // indirect
)

我完全不知所措，我怀疑它与不正确的版本有关，但构建日志并没有给我太多继续下去的信息。我以后如何诊断此类问题？

谢谢。

Answer 1

回来标记这个完成，我发现通过在 go mod 文件中指定

// +heroku goVersion go1.15

Go buildback 支持在构建之前指定版本控制的任意注释。

https://github.com/heroku/heroku-buildpack-go#go-module-specifics

也感谢用户@JimB 为我指明了正确的方向。

Answer 2

您可以在 go.mod 文件中添加指令 // +heroku goVersion go1.15。

module somemodule

// +heroku goVersion go1.15
go 1.15

require (
    // ...
)

那么它应该是这样的。

remote:        Detected go modules via go.mod
remote: ----->
remote:        Detected Module Name: somemodule
remote: ----->
remote: -----> New Go Version, clearing old cache
remote: -----> Installing go1.15

文档：https://github.com/heroku/heroku-buildpack-go#go-module-specifics

Go Module Specifics

You can specify specific package spec(s) via the go.mod file's // +heroku install directive (see below).

// +heroku goVersion <version>: the major version of go you would like Heroku to use when compiling your code. If not specified this defaults to the buildpack's [DefaultVersion].

为什么这个 Go 构建在 Heroku 上失败了？它在本地构建没有问题

Why is this Go build failing on Heroku? It builds locally with no issue

deployment

build

heroku

go

Go Module Specifics