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// Copyright 2018 The Bazel Authors. All rights reserved.
//
// 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.
package cc_libs_test
import (
"debug/macho"
"path"
"strings"
"testing"
"github.com/bazelbuild/rules_go/go/tools/bazel"
)
func TestBinaries(t *testing.T) {
for _, test := range []struct {
shortPath string
wantLibs map[string]bool
}{
{
shortPath: "tests/core/cgo/pure_bin",
// Since go1.11, pure binaries have a dependency on libSystem.
// This is true with go tool link -linkmode=internal
// and with CGO_ENABLED=0 go build ...
wantLibs: map[string]bool{"libc++": false},
}, {
shortPath: "tests/core/cgo/c_srcs_bin",
wantLibs: map[string]bool{"libSystem": true, "libc++": false},
}, {
shortPath: "tests/core/cgo/cc_srcs_bin",
wantLibs: map[string]bool{"libSystem": true, "libc++": true},
}, {
shortPath: "tests/core/cgo/cc_deps_bin",
wantLibs: map[string]bool{"libSystem": true, "libc++": true},
},
} {
t.Run(path.Base(test.shortPath), func(t *testing.T) {
libs, err := listLibs(test.shortPath)
if err != nil {
t.Fatal(err)
}
haveLibs := make(map[string]bool)
for _, lib := range libs {
haveLibs[lib] = true
}
for haveLib := range haveLibs {
if wantLib, ok := test.wantLibs[haveLib]; ok && !wantLib {
t.Errorf("unexpected dependency on library %q", haveLib)
}
}
for wantLib, want := range test.wantLibs {
if want && !haveLibs[wantLib] {
t.Errorf("wanted dependency on library %q", wantLib)
}
}
verifyNoCachePaths(t, test.shortPath)
})
}
}
func listLibs(shortPath string) ([]string, error) {
binPath, err := bazel.Runfile(shortPath)
if err != nil {
return nil, err
}
f, err := macho.Open(binPath)
if err != nil {
return nil, err
}
defer f.Close()
libs, err := f.ImportedLibraries()
if err != nil {
return nil, err
}
for i := range libs {
if pos := strings.LastIndexByte(libs[i], '/'); pos >= 0 {
libs[i] = libs[i][pos+1:]
}
if pos := strings.IndexByte(libs[i], '.'); pos >= 0 {
libs[i] = libs[i][:pos]
}
}
return libs, nil
}
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