安装前准备：
设置GOPROXY代理
我使用的是下面的两条命令：
$ go env -w GO111MODULE=on $ go env -w GOPROXY=https://goproxy.cn,direct
我的go env信息：
% go env GO111MODULE="on" GOARCH="amd64" GOBIN="" GOCACHE="/Users/mac/Library/Caches/go-build" GOENV="/Users/mac/Library/Application Support/go/env" GOEXE="" GOFLAGS="" GOHOSTARCH="amd64" GOHOSTOS="darwin" GOINSECURE="" GOMODCACHE="/Users/mac/go/pkg/mod" GONOPROXY="" GONOSUMDB="" GOOS="darwin" GOPATH="/Users/mac/go" GOPRIVATE="" GOPROXY="https://proxy.golang.org,direct" GOROOT="/usr/local/go" GOSUMDB="sum.golang.org" GOTMPDIR="" GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64" GCCGO="gccgo" AR="ar" CC="clang" CXX="clang++" CGO_ENABLED="1" GOMOD="/Users/mac/www/iris/go.mod" CGO_CFLAGS="-g -O2" CGO_CPPFLAGS="" CGO_CXXFLAGS="-g -O2" CGO_FFLAGS="-g -O2" CGO_LDFLAGS="-g -O2" PKG_CONFIG="pkg-config" GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/d5/13f52jg52n500y4w_8bxcx680000gn/T/go-build475857461=/tmp/go-build -gno-record-gcc-switches -fno-common" mac@MacdeMacBook-Pro iris % go env -w GO111MODULE=on mac@MacdeMacBook-Pro iris % go env -w GOPROXY=https://goproxy.cn,direct mac@MacdeMacBook-Pro iris % go env GO111MODULE="on" GOARCH="amd64" GOBIN="" GOCACHE="/Users/mac/Library/Caches/go-build" GOENV="/Users/mac/Library/Application Support/go/env" GOEXE="" GOFLAGS="" GOHOSTARCH="amd64" GOHOSTOS="darwin" GOINSECURE="" GOMODCACHE="/Users/mac/go/pkg/mod" GONOPROXY="" GONOSUMDB="" GOOS="darwin" GOPATH="/Users/mac/go" GOPRIVATE="" GOPROXY="https://goproxy.cn,direct" GOROOT="/usr/local/go" GOSUMDB="sum.golang.org" GOTMPDIR="" GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64" GCCGO="gccgo" AR="ar" CC="clang" CXX="clang++" CGO_ENABLED="1" GOMOD="/Users/mac/www/iris/go.mod" CGO_CFLAGS="-g -O2" CGO_CPPFLAGS="" CGO_CXXFLAGS="-g -O2" CGO_FFLAGS="-g -O2" CGO_LDFLAGS="-g -O2" PKG_CONFIG="pkg-config" GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/d5/13f52jg52n500y4w_8bxcx680000gn/T/go-build212739672=/tmp/go-build -gno-record-gcc-switches -fno-common"
安装过程参考：https://www.iris-go.com/docs/#/
创建一个新项目：
% cd ~/www
% mkdir iris
% cd iris
% go mod init iris
go: creating new go.mod: module iris
% ls
go.mod
%vim main.go
package main
import (
"github.com/kataras/iris/v12"
)
func main() {
app := iris.New()
app.Get("/", func(ctx iris.Context) {
ctx.HTML("<h1>Hello World!</h1>")
app.Logger().Info("我在学习Iris噢")
})
app.Run(iris.Addr(":8009"))
}
实际安装过程：
go get -u github.com/kataras/iris/v12@master go: downloading github.com/kataras/iris/v12 v12.2.0-alpha.0.20201126085352-5b6802d00eaf go: downloading github.com/kataras/iris v0.0.0-20191006184023-c8e73f4f4df2 go: github.com/kataras/iris/v12 master => v12.2.0-alpha.0.20201126085352-5b6802d00eaf go: downloading github.com/tdewolff/minify/v2 v2.9.10 go: downloading github.com/BurntSushi/toml v0.3.1 go: downloading github.com/kataras/tunnel v0.0.2 go: downloading github.com/mailru/easyjson v0.7.6 go: downloading gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776 go: downloading github.com/json-iterator/go v1.1.10 go: downloading github.com/schollz/closestmatch v2.1.0+incompatible go: downloading github.com/fatih/structs v1.1.0 go: downloading github.com/CloudyKit/jet/v5 v5.1.1 go: downloading github.com/flosch/pongo2/v4 v4.0.0 go: downloading github.com/kataras/golog v0.1.5 go: downloading gopkg.in/ini.v1 v1.62.0 go: downloading golang.org/x/text v0.3.4 go: downloading github.com/kataras/blocks v0.0.4 go: downloading github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 go: downloading github.com/tdewolff/parse/v2 v2.5.5 go: downloading github.com/kataras/pio v0.0.10 go: downloading github.com/iris-contrib/jade v1.1.4 go: downloading google.golang.org/protobuf v1.25.0 go: downloading github.com/yosssi/ace v0.0.5 go: downloading github.com/CloudyKit/fastprinter v0.0.0-20200109182630-33d98a066a53 go: downloading golang.org/x/sys v0.0.0-20201119102817-f84b799fce68 go: downloading github.com/google/uuid v1.1.2 go: downloading github.com/aymerick/raymond v2.0.3-0.20180322193309-b565731e1464+incompatible go: downloading golang.org/x/time v0.0.0-20200630173020-3af7569d3a1e go: downloading github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742 go: downloading golang.org/x/net v0.0.0-20201110031124-69a78807bb2b go: downloading github.com/russross/blackfriday v1.5.2 go: downloading github.com/klauspost/compress v1.11.3 go: downloading github.com/eknkc/amber v0.0.0-20171010120322-cdade1c07385 go: downloading github.com/andybalholm/brotli v1.0.1 go: downloading github.com/vmihailenco/msgpack/v5 v5.0.0 go: downloading github.com/russross/blackfriday/v2 v2.1.0 go: downloading github.com/iris-contrib/schema v0.0.6 go: downloading github.com/vmihailenco/tagparser v0.1.2 go: downloading github.com/kataras/sitemap v0.0.5 go: downloading github.com/valyala/bytebufferpool v1.0.0 go: downloading golang.org/x/crypto v0.0.0-20201124201722-c8d3bf9c5392 go: downloading github.com/Shopify/goreferrer v0.0.0-20181106222321-ec9c9a553398 go: downloading github.com/microcosm-cc/bluemonday v1.0.4 go: downloading github.com/chris-ramon/douceur v0.2.0 go: downloading github.com/aymerick/douceur v0.2.0 go: downloading github.com/gorilla/css v1.0.0
以上安装在了~/go/pkg/mod目录下了：
创建一个main.go文件:
%vim main.go
package main
import (
"github.com/kataras/iris/v12"
)
func main() {
app := iris.New()
app.Get("/", func(ctx iris.Context) {
ctx.HTML("<h1>Hello World!</h1>")
app.Logger().Info("我在学习Iris噢")
})
app.Run(iris.Addr(":8009"))
}
以上保存后运行：
% go run main.go
Now listening on: http://localhost:8009
Application started. Press CMD+C to shut down.
用goland打开刚才的iris项目发现不能识别iris，引入的iris部分提示红色，解决办法为：Preferences->Go Modules
保存即可
外部库下载到项目根目录下：
% go mod vendor
执行之后，项目的根目录下增加了一个vendor的文件夹，文件夹的名字和PHP的composer生成的文件夹相同，作用也是一样的。
然后在这基础上可以进行功能的开发了。
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