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/textnotice/textnotice_test.go b/tools/compliance/cmd/textnotice/textnotice_test.go
new file mode 100644
index 0000000..7993532
--- /dev/null
+++ b/tools/compliance/cmd/textnotice/textnotice_test.go
@@ -0,0 +1,623 @@
+// 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"
+	"regexp"
+	"strings"
+	"testing"
+)
+
+var (
+	horizontalRule = regexp.MustCompile("^===[=]*===$")
+)
+
+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 []matcher
+	}{
+		{
+			condition: "firstparty",
+			name:      "apex",
+			roots:     []string{"highest.apex.meta_lic"},
+			expectedOut: []matcher{
+				hr{},
+				library{"Android"},
+				usedBy{"highest.apex"},
+				usedBy{"highest.apex/bin/bin1"},
+				usedBy{"highest.apex/bin/bin2"},
+				usedBy{"highest.apex/lib/liba.so"},
+				usedBy{"highest.apex/lib/libb.so"},
+				firstParty{},
+			},
+		},
+		{
+			condition: "firstparty",
+			name:      "container",
+			roots:     []string{"container.zip.meta_lic"},
+			expectedOut: []matcher{
+				hr{},
+				library{"Android"},
+				usedBy{"container.zip"},
+				usedBy{"container.zip/bin1"},
+				usedBy{"container.zip/bin2"},
+				usedBy{"container.zip/liba.so"},
+				usedBy{"container.zip/libb.so"},
+				firstParty{},
+			},
+		},
+		{
+			condition: "firstparty",
+			name:      "application",
+			roots:     []string{"application.meta_lic"},
+			expectedOut: []matcher{
+				hr{},
+				library{"Android"},
+				usedBy{"application"},
+				firstParty{},
+			},
+		},
+		{
+			condition: "firstparty",
+			name:      "binary",
+			roots:     []string{"bin/bin1.meta_lic"},
+			expectedOut: []matcher{
+				hr{},
+				library{"Android"},
+				usedBy{"bin/bin1"},
+				firstParty{},
+			},
+		},
+		{
+			condition: "firstparty",
+			name:      "library",
+			roots:     []string{"lib/libd.so.meta_lic"},
+			expectedOut: []matcher{
+				hr{},
+				library{"Android"},
+				usedBy{"lib/libd.so"},
+				firstParty{},
+			},
+		},
+		{
+			condition: "notice",
+			name:      "apex",
+			roots:     []string{"highest.apex.meta_lic"},
+			expectedOut: []matcher{
+				hr{},
+				library{"Android"},
+				usedBy{"highest.apex"},
+				usedBy{"highest.apex/bin/bin1"},
+				usedBy{"highest.apex/bin/bin2"},
+				usedBy{"highest.apex/lib/libb.so"},
+				firstParty{},
+				hr{},
+				library{"Device"},
+				usedBy{"highest.apex/bin/bin1"},
+				usedBy{"highest.apex/lib/liba.so"},
+				library{"External"},
+				usedBy{"highest.apex/bin/bin1"},
+				notice{},
+			},
+		},
+		{
+			condition: "notice",
+			name:      "container",
+			roots:     []string{"container.zip.meta_lic"},
+			expectedOut: []matcher{
+				hr{},
+				library{"Android"},
+				usedBy{"container.zip"},
+				usedBy{"container.zip/bin1"},
+				usedBy{"container.zip/bin2"},
+				usedBy{"container.zip/libb.so"},
+				firstParty{},
+				hr{},
+				library{"Device"},
+				usedBy{"container.zip/bin1"},
+				usedBy{"container.zip/liba.so"},
+				library{"External"},
+				usedBy{"container.zip/bin1"},
+				notice{},
+			},
+		},
+		{
+			condition: "notice",
+			name:      "application",
+			roots:     []string{"application.meta_lic"},
+			expectedOut: []matcher{
+				hr{},
+				library{"Android"},
+				usedBy{"application"},
+				firstParty{},
+				hr{},
+				library{"Device"},
+				usedBy{"application"},
+				notice{},
+			},
+		},
+		{
+			condition: "notice",
+			name:      "binary",
+			roots:     []string{"bin/bin1.meta_lic"},
+			expectedOut: []matcher{
+				hr{},
+				library{"Android"},
+				usedBy{"bin/bin1"},
+				firstParty{},
+				hr{},
+				library{"Device"},
+				usedBy{"bin/bin1"},
+				library{"External"},
+				usedBy{"bin/bin1"},
+				notice{},
+			},
+		},
+		{
+			condition: "notice",
+			name:      "library",
+			roots:     []string{"lib/libd.so.meta_lic"},
+			expectedOut: []matcher{
+				hr{},
+				library{"External"},
+				usedBy{"lib/libd.so"},
+				notice{},
+			},
+		},
+		{
+			condition: "reciprocal",
+			name:      "apex",
+			roots:     []string{"highest.apex.meta_lic"},
+			expectedOut: []matcher{
+				hr{},
+				library{"Android"},
+				usedBy{"highest.apex"},
+				usedBy{"highest.apex/bin/bin1"},
+				usedBy{"highest.apex/bin/bin2"},
+				usedBy{"highest.apex/lib/libb.so"},
+				firstParty{},
+				hr{},
+				library{"Device"},
+				usedBy{"highest.apex/bin/bin1"},
+				usedBy{"highest.apex/lib/liba.so"},
+				library{"External"},
+				usedBy{"highest.apex/bin/bin1"},
+				reciprocal{},
+			},
+		},
+		{
+			condition: "reciprocal",
+			name:      "container",
+			roots:     []string{"container.zip.meta_lic"},
+			expectedOut: []matcher{
+				hr{},
+				library{"Android"},
+				usedBy{"container.zip"},
+				usedBy{"container.zip/bin1"},
+				usedBy{"container.zip/bin2"},
+				usedBy{"container.zip/libb.so"},
+				firstParty{},
+				hr{},
+				library{"Device"},
+				usedBy{"container.zip/bin1"},
+				usedBy{"container.zip/liba.so"},
+				library{"External"},
+				usedBy{"container.zip/bin1"},
+				reciprocal{},
+			},
+		},
+		{
+			condition: "reciprocal",
+			name:      "application",
+			roots:     []string{"application.meta_lic"},
+			expectedOut: []matcher{
+				hr{},
+				library{"Android"},
+				usedBy{"application"},
+				firstParty{},
+				hr{},
+				library{"Device"},
+				usedBy{"application"},
+				reciprocal{},
+			},
+		},
+		{
+			condition: "reciprocal",
+			name:      "binary",
+			roots:     []string{"bin/bin1.meta_lic"},
+			expectedOut: []matcher{
+				hr{},
+				library{"Android"},
+				usedBy{"bin/bin1"},
+				firstParty{},
+				hr{},
+				library{"Device"},
+				usedBy{"bin/bin1"},
+				library{"External"},
+				usedBy{"bin/bin1"},
+				reciprocal{},
+			},
+		},
+		{
+			condition: "reciprocal",
+			name:      "library",
+			roots:     []string{"lib/libd.so.meta_lic"},
+			expectedOut: []matcher{
+				hr{},
+				library{"External"},
+				usedBy{"lib/libd.so"},
+				notice{},
+			},
+		},
+		{
+			condition: "restricted",
+			name:      "apex",
+			roots:     []string{"highest.apex.meta_lic"},
+			expectedOut: []matcher{
+				hr{},
+				library{"Android"},
+				usedBy{"highest.apex"},
+				usedBy{"highest.apex/bin/bin1"},
+				usedBy{"highest.apex/bin/bin2"},
+				firstParty{},
+				hr{},
+				library{"Android"},
+				usedBy{"highest.apex/bin/bin2"},
+				usedBy{"highest.apex/lib/libb.so"},
+				library{"Device"},
+				usedBy{"highest.apex/bin/bin1"},
+				usedBy{"highest.apex/lib/liba.so"},
+				restricted{},
+				hr{},
+				library{"External"},
+				usedBy{"highest.apex/bin/bin1"},
+				reciprocal{},
+			},
+		},
+		{
+			condition: "restricted",
+			name:      "container",
+			roots:     []string{"container.zip.meta_lic"},
+			expectedOut: []matcher{
+				hr{},
+				library{"Android"},
+				usedBy{"container.zip"},
+				usedBy{"container.zip/bin1"},
+				usedBy{"container.zip/bin2"},
+				firstParty{},
+				hr{},
+				library{"Android"},
+				usedBy{"container.zip/bin2"},
+				usedBy{"container.zip/libb.so"},
+				library{"Device"},
+				usedBy{"container.zip/bin1"},
+				usedBy{"container.zip/liba.so"},
+				restricted{},
+				hr{},
+				library{"External"},
+				usedBy{"container.zip/bin1"},
+				reciprocal{},
+			},
+		},
+		{
+			condition: "restricted",
+			name:      "application",
+			roots:     []string{"application.meta_lic"},
+			expectedOut: []matcher{
+				hr{},
+				library{"Android"},
+				usedBy{"application"},
+				firstParty{},
+				hr{},
+				library{"Device"},
+				usedBy{"application"},
+				restricted{},
+			},
+		},
+		{
+			condition: "restricted",
+			name:      "binary",
+			roots:     []string{"bin/bin1.meta_lic"},
+			expectedOut: []matcher{
+				hr{},
+				library{"Android"},
+				usedBy{"bin/bin1"},
+				firstParty{},
+				hr{},
+				library{"Device"},
+				usedBy{"bin/bin1"},
+				restricted{},
+				hr{},
+				library{"External"},
+				usedBy{"bin/bin1"},
+				reciprocal{},
+			},
+		},
+		{
+			condition: "restricted",
+			name:      "library",
+			roots:     []string{"lib/libd.so.meta_lic"},
+			expectedOut: []matcher{
+				hr{},
+				library{"External"},
+				usedBy{"lib/libd.so"},
+				notice{},
+			},
+		},
+		{
+			condition: "proprietary",
+			name:      "apex",
+			roots:     []string{"highest.apex.meta_lic"},
+			expectedOut: []matcher{
+				hr{},
+				library{"Android"},
+				usedBy{"highest.apex/bin/bin2"},
+				usedBy{"highest.apex/lib/libb.so"},
+				restricted{},
+				hr{},
+				library{"Android"},
+				usedBy{"highest.apex"},
+				usedBy{"highest.apex/bin/bin1"},
+				firstParty{},
+				hr{},
+				library{"Android"},
+				usedBy{"highest.apex/bin/bin2"},
+				library{"Device"},
+				usedBy{"highest.apex/bin/bin1"},
+				usedBy{"highest.apex/lib/liba.so"},
+				library{"External"},
+				usedBy{"highest.apex/bin/bin1"},
+				proprietary{},
+			},
+		},
+		{
+			condition: "proprietary",
+			name:      "container",
+			roots:     []string{"container.zip.meta_lic"},
+			expectedOut: []matcher{
+				hr{},
+				library{"Android"},
+				usedBy{"container.zip/bin2"},
+				usedBy{"container.zip/libb.so"},
+				restricted{},
+				hr{},
+				library{"Android"},
+				usedBy{"container.zip"},
+				usedBy{"container.zip/bin1"},
+				firstParty{},
+				hr{},
+				library{"Android"},
+				usedBy{"container.zip/bin2"},
+				library{"Device"},
+				usedBy{"container.zip/bin1"},
+				usedBy{"container.zip/liba.so"},
+				library{"External"},
+				usedBy{"container.zip/bin1"},
+				proprietary{},
+			},
+		},
+		{
+			condition: "proprietary",
+			name:      "application",
+			roots:     []string{"application.meta_lic"},
+			expectedOut: []matcher{
+				hr{},
+				library{"Android"},
+				usedBy{"application"},
+				firstParty{},
+				hr{},
+				library{"Device"},
+				usedBy{"application"},
+				proprietary{},
+			},
+		},
+		{
+			condition: "proprietary",
+			name:      "binary",
+			roots:     []string{"bin/bin1.meta_lic"},
+			expectedOut: []matcher{
+				hr{},
+				library{"Android"},
+				usedBy{"bin/bin1"},
+				firstParty{},
+				hr{},
+				library{"Device"},
+				usedBy{"bin/bin1"},
+				library{"External"},
+				usedBy{"bin/bin1"},
+				proprietary{},
+			},
+		},
+		{
+			condition: "proprietary",
+			name:      "library",
+			roots:     []string{"lib/libd.so.meta_lic"},
+			expectedOut: []matcher{
+				hr{},
+				library{"External"},
+				usedBy{"lib/libd.so"},
+				notice{},
+			},
+		},
+	}
+	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 := textNotice(&ctx, rootFiles...)
+			if err != nil {
+				t.Fatalf("textnotice: error = %v, stderr = %v", err, stderr)
+				return
+			}
+			if stderr.Len() > 0 {
+				t.Errorf("textnotice: gotStderr = %v, want none", stderr)
+			}
+
+			t.Logf("got stdout: %s", stdout.String())
+
+			t.Logf("want stdout: %s", matcherList(tt.expectedOut).String())
+
+			out := bufio.NewScanner(stdout)
+			lineno := 0
+			for out.Scan() {
+				line := out.Text()
+				if strings.TrimLeft(line, " ") == "" {
+					continue
+				}
+				if len(tt.expectedOut) <= lineno {
+					t.Errorf("unexpected output at line %d: got %q, want nothing (wanted %d lines)", lineno+1, line, len(tt.expectedOut))
+				} else if !tt.expectedOut[lineno].isMatch(line) {
+					t.Errorf("unexpected output at line %d: got %q, want %q", lineno+1, line, tt.expectedOut[lineno].String())
+				}
+				lineno++
+			}
+			for ; lineno < len(tt.expectedOut); lineno++ {
+				t.Errorf("textnotice: missing output line %d: ended early, want %q", lineno+1, tt.expectedOut[lineno].String())
+			}
+		})
+	}
+}
+
+type matcher interface {
+	isMatch(line string) bool
+	String() string
+}
+
+type hr struct{}
+
+func (m hr) isMatch(line string) bool {
+	return horizontalRule.MatchString(line)
+}
+
+func (m hr) String() string {
+	return " ================================================== "
+}
+
+type library struct {
+	name string
+}
+
+func (m library) isMatch(line string) bool {
+	return strings.HasPrefix(line, m.name+" ")
+}
+
+func (m library) String() string {
+	return m.name + " used by:"
+}
+
+type usedBy struct {
+	name string
+}
+
+func (m usedBy) isMatch(line string) bool {
+	return len(line) > 0 && line[0] == ' ' && strings.HasPrefix(strings.TrimLeft(line, " "), "out/") && strings.HasSuffix(line, "/"+m.name)
+}
+
+func (m usedBy) String() string {
+	return "  out/.../" + m.name
+}
+
+type firstParty struct{}
+
+func (m firstParty) isMatch(line string) bool {
+	return strings.HasPrefix(strings.TrimLeft(line, " "), "&&&First Party License&&&")
+}
+
+func (m firstParty) String() string {
+	return "&&&First Party License&&&"
+}
+
+type notice struct{}
+
+func (m notice) isMatch(line string) bool {
+	return strings.HasPrefix(strings.TrimLeft(line, " "), "%%%Notice License%%%")
+}
+
+func (m notice) String() string {
+	return "%%%Notice License%%%"
+}
+
+type reciprocal struct{}
+
+func (m reciprocal) isMatch(line string) bool {
+	return strings.HasPrefix(strings.TrimLeft(line, " "), "$$$Reciprocal License$$$")
+}
+
+func (m reciprocal) String() string {
+	return "$$$Reciprocal License$$$"
+}
+
+type restricted struct{}
+
+func (m restricted) isMatch(line string) bool {
+	return strings.HasPrefix(strings.TrimLeft(line, " "), "###Restricted License###")
+}
+
+func (m restricted) String() string {
+	return "###Restricted License###"
+}
+
+type proprietary struct{}
+
+func (m proprietary) isMatch(line string) bool {
+	return strings.HasPrefix(strings.TrimLeft(line, " "), "@@@Proprietary License@@@")
+}
+
+func (m proprietary) String() string {
+	return "@@@Proprietary License@@@"
+}
+
+type matcherList []matcher
+
+func (l matcherList) String() string {
+	var sb strings.Builder
+	for _, m := range l {
+		s := m.String()
+		if s[:3] == s[len(s)-3:] {
+			fmt.Fprintln(&sb)
+		}
+		fmt.Fprintf(&sb, "%s\n", s)
+		if s[:3] == s[len(s)-3:] {
+			fmt.Fprintln(&sb)
+		}
+	}
+	return sb.String()
+}