forked from cockroachdb/cockroach
/
build.go
52 lines (45 loc) · 1.48 KB
/
build.go
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// Copyright 2015 The Cockroach Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
// implied. See the License for the specific language governing
// permissions and limitations under the License.
//
// Author: Peter Mattis (peter@cockroachlabs.com)
package testutils
import "go/build"
// TransitiveImports returns a set containing all of importpath's
// transitive dependencies.
func TransitiveImports(importpath string, cgo bool) (map[string]struct{}, error) {
buildContext := build.Default
buildContext.CgoEnabled = cgo
imports := make(map[string]struct{})
var addImports func(string) error
addImports = func(root string) error {
pkg, err := buildContext.Import(root, buildContext.GOPATH, 0)
if err != nil {
return err
}
for _, imp := range pkg.Imports {
// https://github.com/golang/tools/blob/master/refactor/importgraph/graph.go#L115
if imp == "C" {
continue // "C" is fake
}
if _, ok := imports[imp]; !ok {
imports[imp] = struct{}{}
if err := addImports(imp); err != nil {
return err
}
}
}
return nil
}
return imports, addImports(importpath)
}