// IsDirect returns whether the given module provides a package directly
// imported by a package or test in the main module.
func (rs *Requirements) IsDirect(path string) bool {
	return rs.direct[path]
}

// A ModuleGraph represents the complete graph of module dependencies
// of a main module.
//
// If the main module supports module graph pruning, the graph does not include

//
// For:
//
//	x = m[string(k)]
//	x = m[T1{... Tn{..., string(k), ...}}]
//
// where k is []byte, T1 to Tn is a nesting of struct and array literals,
// the allocation of backing bytes for the string can be avoided
// by reusing the []byte backing array. These are special cases
// for avoiding allocations when converting byte slices to strings.
// It would be nice to handle these generally, but because

	}

	// Make a best-effort attempt to acquire the side lock, only to exclude
	// previous versions of the 'go' command from making simultaneous edits.
	if unlock, err := SideLock(ctx); err == nil {
		defer unlock()
	}

	err := lockedfile.Transform(GoSumFile, func(data []byte) ([]byte, error) {
		tidyGoSum := tidyGoSum(data, keep)

	}

	if search.IsMetaPackage(e.Pattern) || strings.Contains(e.Pattern, "...") {
		return fmt.Sprintf("pattern %s matches package %s in the main module, so can't request version %s", e.Pattern, e.Packages[0], e.Query)
	}

to it. Whether Go memory is pinned is a dynamic property of that memory
region; it has nothing to do with the type of the pointer.

Go values created by calling new, by taking the address of a composite
literal, or by taking the address of a local variable may also have their
memory pinned using [runtime.Pinner]. This type may be used to manage
the duration of the memory's pinned status, potentially beyond the

	-buildmode=exe
		Build the listed main packages and everything they import into
		executables. Packages not named main are ignored.

	-buildmode=pie
		Build the listed main packages and everything they import into
		position independent executables (PIE). Packages not named
		main are ignored.

	-buildmode=plugin
		Build the listed main packages, plus all packages that they

		}
	}

	// Compile a main package.
	write("main.go", "package main; func main() {}")
	importcfgfile := filepath.Join(tmpdir, "importcfg")
	testenv.WriteImportcfg(t, importcfgfile, nil, filepath.Join(tmpdir, "main.go"))
	runGo("tool", "compile", "-importcfg="+importcfgfile, "-p=main", "main.go")
	runGo("tool", "pack", "c", "main.a", "main.o")

	// Add an extra section with a short, non-.o name.

//
// to sbCheck, and returns true. If a is a simple variable or field reference,
// it writes
//
//	_cgoIndexNN := &a
//
// and dereferences the uses of _cgoIndexNN. Taking the address avoids
// making a copy of an array.
//
// This tells _cgoCheckPointer to check the complete contents of the
// slice or array being indexed, but no other part of the memory allocation.

}

// HasModRoot reports whether a main module is present.
// HasModRoot may return false even if Enabled returns true: for example, 'get'
// does not require a main module.
func HasModRoot() bool {
	Init()
	return modRoots != nil
}

// MustHaveModRoot checks that a main module or main modules are present,
// and calls base.Fatalf if there are no main modules.
func MustHaveModRoot() {
	Init()

Test files that declare a package with the suffix "_test" will be compiled as a
separate package, and then linked and run with the main test binary.

The go tool will ignore a directory named "testdata", making it available
to hold ancillary data needed by the tests.

As part of building a test binary, go test runs go vet on the package