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Member "go/src/README.vendor" (26 Apr 2023, 2163 Bytes) of package /linux/misc/go1.20.4.src.tar.gz:


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    1 Vendoring in std and cmd
    2 ========================
    3 
    4 The Go command maintains copies of external packages needed by the
    5 standard library in the src/vendor and src/cmd/vendor directories.
    6 
    7 There are two modules, std and cmd, defined in src/go.mod and
    8 src/cmd/go.mod. When a package outside std or cmd is imported
    9 by a package inside std or cmd, the import path is interpreted
   10 as if it had a "vendor/" prefix. For example, within "crypto/tls",
   11 an import of "golang.org/x/crypto/cryptobyte" resolves to
   12 "vendor/golang.org/x/crypto/cryptobyte". When a package with the
   13 same path is imported from a package outside std or cmd, it will
   14 be resolved normally. Consequently, a binary may be built with two
   15 copies of a package at different versions if the package is
   16 imported normally and vendored by the standard library.
   17 
   18 Vendored packages are internally renamed with a "vendor/" prefix
   19 to preserve the invariant that all packages have distinct paths.
   20 This is necessary to avoid compiler and linker conflicts. Adding
   21 a "vendor/" prefix also maintains the invariant that standard
   22 library packages begin with a dotless path element.
   23 
   24 The module requirements of std and cmd do not influence version
   25 selection in other modules. They are only considered when running
   26 module commands like 'go get' and 'go mod vendor' from a directory
   27 in GOROOT/src.
   28 
   29 Maintaining vendor directories
   30 ==============================
   31 
   32 Before updating vendor directories, ensure that module mode is enabled.
   33 Make sure that GO111MODULE is not set in the environment, or that it is
   34 set to 'on' or 'auto'.
   35 
   36 Requirements may be added, updated, and removed with 'go get'.
   37 The vendor directory may be updated with 'go mod vendor'.
   38 A typical sequence might be:
   39 
   40     cd src
   41     go get golang.org/x/net@latest
   42     go mod tidy
   43     go mod vendor
   44 
   45 Use caution when passing '-u' to 'go get'. The '-u' flag updates
   46 modules providing all transitively imported packages, not only
   47 the module providing the target package.
   48 
   49 Note that 'go mod vendor' only copies packages that are transitively
   50 imported by packages in the current module. If a new package is needed,
   51 it should be imported before running 'go mod vendor'.