Move compliance commands into subdirectories

Move each compliance command into its own directory to avoid Go tooling
considering all the files to be a single package and complaining about
conflicting global names.

Test: go test ./...
Change-Id: I3db6310e7368bcc7fe6a3704b40a84078ed44209
diff --git a/tools/compliance/cmd/bom/bom_test.go b/tools/compliance/cmd/bom/bom_test.go
new file mode 100644
index 0000000..163ac2a
--- /dev/null
+++ b/tools/compliance/cmd/bom/bom_test.go
@@ -0,0 +1,319 @@
+// Copyright 2021 Google LLC
+//
+// 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 main
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"os"
+	"strings"
+	"testing"
+)
+
+func TestMain(m *testing.M) {
+	// Change into the parent directory before running the tests
+	// so they can find the testdata directory.
+	if err := os.Chdir(".."); err != nil {
+		fmt.Printf("failed to change to testdata directory: %s\n", err)
+		os.Exit(1)
+	}
+	os.Exit(m.Run())
+}
+
+func Test(t *testing.T) {
+	tests := []struct {
+		condition   string
+		name        string
+		roots       []string
+		stripPrefix string
+		expectedOut []string
+	}{
+		{
+			condition:   "firstparty",
+			name:        "apex",
+			roots:       []string{"highest.apex.meta_lic"},
+			stripPrefix: "out/target/product/fictional",
+			expectedOut: []string{
+				"/system/apex/highest.apex",
+				"/system/apex/highest.apex/bin/bin1",
+				"/system/apex/highest.apex/bin/bin2",
+				"/system/apex/highest.apex/lib/liba.so",
+				"/system/apex/highest.apex/lib/libb.so",
+			},
+		},
+		{
+			condition:   "firstparty",
+			name:        "container",
+			roots:       []string{"container.zip.meta_lic"},
+			stripPrefix: "out/target/product/fictional/data/",
+			expectedOut: []string{
+				"container.zip",
+				"container.zip/bin1",
+				"container.zip/bin2",
+				"container.zip/liba.so",
+				"container.zip/libb.so",
+			},
+		},
+		{
+			condition:   "firstparty",
+			name:        "application",
+			roots:       []string{"application.meta_lic"},
+			stripPrefix: "out/target/product/fictional/bin/",
+			expectedOut: []string{"application"},
+		},
+		{
+			condition:   "firstparty",
+			name:        "binary",
+			roots:       []string{"bin/bin1.meta_lic"},
+			stripPrefix: "out/target/product/fictional/system/",
+			expectedOut: []string{"bin/bin1"},
+		},
+		{
+			condition:   "firstparty",
+			name:        "library",
+			roots:       []string{"lib/libd.so.meta_lic"},
+			stripPrefix: "out/target/product/fictional/system/",
+			expectedOut: []string{"lib/libd.so"},
+		},
+		{
+			condition: "notice",
+			name:      "apex",
+			roots:     []string{"highest.apex.meta_lic"},
+			expectedOut: []string{
+				"out/target/product/fictional/system/apex/highest.apex",
+				"out/target/product/fictional/system/apex/highest.apex/bin/bin1",
+				"out/target/product/fictional/system/apex/highest.apex/bin/bin2",
+				"out/target/product/fictional/system/apex/highest.apex/lib/liba.so",
+				"out/target/product/fictional/system/apex/highest.apex/lib/libb.so",
+			},
+		},
+		{
+			condition: "notice",
+			name:      "container",
+			roots:     []string{"container.zip.meta_lic"},
+			expectedOut: []string{
+				"out/target/product/fictional/data/container.zip",
+				"out/target/product/fictional/data/container.zip/bin1",
+				"out/target/product/fictional/data/container.zip/bin2",
+				"out/target/product/fictional/data/container.zip/liba.so",
+				"out/target/product/fictional/data/container.zip/libb.so",
+			},
+		},
+		{
+			condition:   "notice",
+			name:        "application",
+			roots:       []string{"application.meta_lic"},
+			expectedOut: []string{"out/target/product/fictional/bin/application"},
+		},
+		{
+			condition:   "notice",
+			name:        "binary",
+			roots:       []string{"bin/bin1.meta_lic"},
+			expectedOut: []string{"out/target/product/fictional/system/bin/bin1"},
+		},
+		{
+			condition:   "notice",
+			name:        "library",
+			roots:       []string{"lib/libd.so.meta_lic"},
+			expectedOut: []string{"out/target/product/fictional/system/lib/libd.so"},
+		},
+		{
+			condition:   "reciprocal",
+			name:        "apex",
+			roots:       []string{"highest.apex.meta_lic"},
+			stripPrefix: "out/target/product/fictional/system/apex/",
+			expectedOut: []string{
+				"highest.apex",
+				"highest.apex/bin/bin1",
+				"highest.apex/bin/bin2",
+				"highest.apex/lib/liba.so",
+				"highest.apex/lib/libb.so",
+			},
+		},
+		{
+			condition:   "reciprocal",
+			name:        "container",
+			roots:       []string{"container.zip.meta_lic"},
+			stripPrefix: "out/target/product/fictional/data/",
+			expectedOut: []string{
+				"container.zip",
+				"container.zip/bin1",
+				"container.zip/bin2",
+				"container.zip/liba.so",
+				"container.zip/libb.so",
+			},
+		},
+		{
+			condition:   "reciprocal",
+			name:        "application",
+			roots:       []string{"application.meta_lic"},
+			stripPrefix: "out/target/product/fictional/bin/",
+			expectedOut: []string{"application"},
+		},
+		{
+			condition:   "reciprocal",
+			name:        "binary",
+			roots:       []string{"bin/bin1.meta_lic"},
+			stripPrefix: "out/target/product/fictional/system/",
+			expectedOut: []string{"bin/bin1"},
+		},
+		{
+			condition:   "reciprocal",
+			name:        "library",
+			roots:       []string{"lib/libd.so.meta_lic"},
+			stripPrefix: "out/target/product/fictional/system/",
+			expectedOut: []string{"lib/libd.so"},
+		},
+		{
+			condition:   "restricted",
+			name:        "apex",
+			roots:       []string{"highest.apex.meta_lic"},
+			stripPrefix: "out/target/product/fictional/system/apex/",
+			expectedOut: []string{
+				"highest.apex",
+				"highest.apex/bin/bin1",
+				"highest.apex/bin/bin2",
+				"highest.apex/lib/liba.so",
+				"highest.apex/lib/libb.so",
+			},
+		},
+		{
+			condition:   "restricted",
+			name:        "container",
+			roots:       []string{"container.zip.meta_lic"},
+			stripPrefix: "out/target/product/fictional/data/",
+			expectedOut: []string{
+				"container.zip",
+				"container.zip/bin1",
+				"container.zip/bin2",
+				"container.zip/liba.so",
+				"container.zip/libb.so",
+			},
+		},
+		{
+			condition:   "restricted",
+			name:        "application",
+			roots:       []string{"application.meta_lic"},
+			stripPrefix: "out/target/product/fictional/bin/",
+			expectedOut: []string{"application"},
+		},
+		{
+			condition:   "restricted",
+			name:        "binary",
+			roots:       []string{"bin/bin1.meta_lic"},
+			stripPrefix: "out/target/product/fictional/system/",
+			expectedOut: []string{"bin/bin1"},
+		},
+		{
+			condition:   "restricted",
+			name:        "library",
+			roots:       []string{"lib/libd.so.meta_lic"},
+			stripPrefix: "out/target/product/fictional/system/",
+			expectedOut: []string{"lib/libd.so"},
+		},
+		{
+			condition:   "proprietary",
+			name:        "apex",
+			roots:       []string{"highest.apex.meta_lic"},
+			stripPrefix: "out/target/product/fictional/system/apex/",
+			expectedOut: []string{
+				"highest.apex",
+				"highest.apex/bin/bin1",
+				"highest.apex/bin/bin2",
+				"highest.apex/lib/liba.so",
+				"highest.apex/lib/libb.so",
+			},
+		},
+		{
+			condition:   "proprietary",
+			name:        "container",
+			roots:       []string{"container.zip.meta_lic"},
+			stripPrefix: "out/target/product/fictional/data/",
+			expectedOut: []string{
+				"container.zip",
+				"container.zip/bin1",
+				"container.zip/bin2",
+				"container.zip/liba.so",
+				"container.zip/libb.so",
+			},
+		},
+		{
+			condition:   "proprietary",
+			name:        "application",
+			roots:       []string{"application.meta_lic"},
+			stripPrefix: "out/target/product/fictional/bin/",
+			expectedOut: []string{"application"},
+		},
+		{
+			condition:   "proprietary",
+			name:        "binary",
+			roots:       []string{"bin/bin1.meta_lic"},
+			stripPrefix: "out/target/product/fictional/system/",
+			expectedOut: []string{"bin/bin1"},
+		},
+		{
+			condition:   "proprietary",
+			name:        "library",
+			roots:       []string{"lib/libd.so.meta_lic"},
+			stripPrefix: "out/target/product/fictional/system/",
+			expectedOut: []string{"lib/libd.so"},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.condition+" "+tt.name, func(t *testing.T) {
+			stdout := &bytes.Buffer{}
+			stderr := &bytes.Buffer{}
+
+			rootFiles := make([]string, 0, len(tt.roots))
+			for _, r := range tt.roots {
+				rootFiles = append(rootFiles, "testdata/"+tt.condition+"/"+r)
+			}
+
+			ctx := context{stdout, stderr, os.DirFS("."), tt.stripPrefix}
+
+			err := billOfMaterials(&ctx, rootFiles...)
+			if err != nil {
+				t.Fatalf("bom: error = %v, stderr = %v", err, stderr)
+				return
+			}
+			if stderr.Len() > 0 {
+				t.Errorf("bom: gotStderr = %v, want none", stderr)
+			}
+
+			t.Logf("got stdout: %s", stdout.String())
+
+			t.Logf("want stdout: %s", strings.Join(tt.expectedOut, "\n"))
+
+			out := bufio.NewScanner(stdout)
+			lineno := 0
+			for out.Scan() {
+				line := out.Text()
+				if strings.TrimLeft(line, " ") == "" {
+					continue
+				}
+				if len(tt.expectedOut) <= lineno {
+					t.Errorf("bom: unexpected output at line %d: got %q, want nothing (wanted %d lines)", lineno+1, line, len(tt.expectedOut))
+				} else if tt.expectedOut[lineno] != line {
+					t.Errorf("bom: unexpected output at line %d: got %q, want %q", lineno+1, line, tt.expectedOut[lineno])
+				}
+				lineno++
+			}
+			for ; lineno < len(tt.expectedOut); lineno++ {
+				t.Errorf("bom: missing output line %d: ended early, want %q", lineno+1, tt.expectedOut[lineno])
+			}
+		})
+	}
+}