go imports 源码
golang imports 代码
文件路径：/src/cmd/vendor/golang.org/x/tools/go/types/typeutil/imports.go
// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package typeutil
import "go/types"
// Dependencies returns all dependencies of the specified packages.
//
// Dependent packages appear in topological order: if package P imports
// package Q, Q appears earlier than P in the result.
// The algorithm follows import statements in the order they
// appear in the source code, so the result is a total order.
func Dependencies(pkgs ...*types.Package) []*types.Package {
var result []*types.Package
seen := make(map[*types.Package]bool)
var visit func(pkgs []*types.Package)
visit = func(pkgs []*types.Package) {
for _, p := range pkgs {
if !seen[p] {
seen[p] = true
visit(p.Imports())
result = append(result, p)
}
}
}
visit(pkgs)
return result
}
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