Golang | vendor folder

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• https://golang.org/cmd/go/#hdr-Vendor_Directories
• http://www.informit.com/store/go-in-24-hours-sams-teach-yourself-next-generation-9780672338038
  • https://github.com/shapeshed/golang-book-examples/tree/master/hour13/example02

As an example, the Go in 24 Hours book has this import block:

import (
    "fmt"
    "github.com/golang/example/stringutil"
)

and a vendor subfolder with a copy of the package (one relative and one explicit here for illustration):

• ./vendor/github.com/golang/example/stringutil
• $GOPATH/src/github.com/shapeshed/golang-book-examples/tree/master/hour13/example02/vendor/github.com/golang/example/stringutil

Because the vendor directory is present and we're using a recent Go verion (e.g., v1.12), Go will use the code from the vendor directory instead of code from $GOPATH/src/github.com/golang/example/stringutil.

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Example tree structure for the vendor folder in the golang-book-examples/hour13/example02 path:

$ tree
.
|-- example02.go
`-- vendor
    `-- github.com
        `-- golang
            `-- example
                `-- stringutil
                    |-- reverse.go
                    `-- reverse_test.go

5 directories, 3 files