1.https://golang.org/ref/mod#go-mod-vendor

2.https://golang.org/ref/mod#vendoring

命令行幫助：

D:\workspace\demo>go help mod vendor
usage: go mod vendor [-e] [-v]

Vendor resets the main module's vendor directory to include all packages
needed to build and test all the main module's packages.
It does not include test code for vendored packages.

The -v flag causes vendor to print the names of vendored
modules and packages to standard error.

The -e flag causes vendor to attempt to proceed despite errors
encountered while loading packages.

See https://golang.org/ref/mod#go-mod-vendor for more about 'go mod vendor'.

關(guān)鍵部分：

1.The go mod vendor command constructs a directory named vendor in the main module’s root directory that contains copies of all packages needed to support builds and tests of packages in the main module.

2.When vendoring is enabled, the go command will load packages from the vendor directory instead of downloading modules from their sources into the module cache and using packages those downloaded copies.

3.If go.mod changed since vendor/modules.txt was generated, go mod vendor should be run again.

如果 go.mod 發(fā)生變化，應(yīng)當(dāng)重新執(zhí)行 go mod vendor！

4.Note that go mod vendor removes the vendor directory if it exists before re-constructing it. Local changes should not be made to vendored packages. The go command does not check that packages in the vendor directory have not been modified, but one can verify the integrity of the vendor directory by running go mod vendor and checking that no changes were made.

1. 執(zhí)行g(shù)o mod vendor將刪除項(xiàng)目中已存在的vendor目錄；
2. 永遠(yuǎn)不要對(duì)vendor中的依賴(lài)庫(kù)進(jìn)行二次修改、更改！
3. go命令不檢查vendor中的依賴(lài)庫(kù)是否被修改；

5.If the vendor directory is present in the main module’s root directory, it will be used automatically if the go version in the main module’s go.mod file is 1.14 or higher. To explicitly enable vendoring, invoke the go command with the flag -mod=vendor. To disable vendoring, use the flag -mod=readonly or -mod=mod.

在go version >= 1.14時(shí)，如果存在vendor目錄，將自動(dòng)啟用vendor。

-mod=vendor
-mod=readonly
-mod=mod

6.When vendoring is enabled, build commands like go build and go test load packages from the vendor directory instead of accessing the network or the local module cache.

5.參考

• https://golang.org/ref/mod#go-mod-vendor
• https://golang.org/ref/mod#vendoring
• https://yanbin.blog/go-use-go-mod-manage-dependencies/
• https://cloud.tencent.com/developer/article/1626849
• https://cloud.tencent.com/developer/article/1604866

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