Add pom2bp
Convert pom2mk to pom2bp that writes out Android.bp files instead
of Android.mk files. pom2mk stays for now until the last users
of it are cleaned up.
Bug: 78300023
Test: cd prebuilts/sdk/current/support && pom2bp -regen Android.mk
Change-Id: I584d63c4228bad32f9e1914b06bde807078d6a55
diff --git a/cmd/pom2bp/pom2bp.go b/cmd/pom2bp/pom2bp.go
new file mode 100644
index 0000000..078a07d
--- /dev/null
+++ b/cmd/pom2bp/pom2bp.go
@@ -0,0 +1,495 @@
+// Copyright 2017 Google Inc. 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 main
+
+import (
+ "bufio"
+ "bytes"
+ "encoding/xml"
+ "flag"
+ "fmt"
+ "io/ioutil"
+ "os"
+ "os/exec"
+ "path/filepath"
+ "regexp"
+ "sort"
+ "strings"
+ "text/template"
+
+ "github.com/google/blueprint/proptools"
+
+ "android/soong/bpfix/bpfix"
+)
+
+type RewriteNames []RewriteName
+type RewriteName struct {
+ regexp *regexp.Regexp
+ repl string
+}
+
+func (r *RewriteNames) String() string {
+ return ""
+}
+
+func (r *RewriteNames) Set(v string) error {
+ split := strings.SplitN(v, "=", 2)
+ if len(split) != 2 {
+ return fmt.Errorf("Must be in the form of <regex>=<replace>")
+ }
+ regex, err := regexp.Compile(split[0])
+ if err != nil {
+ return nil
+ }
+ *r = append(*r, RewriteName{
+ regexp: regex,
+ repl: split[1],
+ })
+ return nil
+}
+
+func (r *RewriteNames) MavenToBp(groupId string, artifactId string) string {
+ for _, r := range *r {
+ if r.regexp.MatchString(groupId + ":" + artifactId) {
+ return r.regexp.ReplaceAllString(groupId+":"+artifactId, r.repl)
+ } else if r.regexp.MatchString(artifactId) {
+ return r.regexp.ReplaceAllString(artifactId, r.repl)
+ }
+ }
+ return artifactId
+}
+
+var rewriteNames = RewriteNames{}
+
+type ExtraDeps map[string][]string
+
+func (d ExtraDeps) String() string {
+ return ""
+}
+
+func (d ExtraDeps) Set(v string) error {
+ split := strings.SplitN(v, "=", 2)
+ if len(split) != 2 {
+ return fmt.Errorf("Must be in the form of <module>=<module>[,<module>]")
+ }
+ d[split[0]] = strings.Split(split[1], ",")
+ return nil
+}
+
+var extraDeps = make(ExtraDeps)
+
+type Exclude map[string]bool
+
+func (e Exclude) String() string {
+ return ""
+}
+
+func (e Exclude) Set(v string) error {
+ e[v] = true
+ return nil
+}
+
+var excludes = make(Exclude)
+
+var sdkVersion string
+var useVersion string
+
+func InList(s string, list []string) bool {
+ for _, l := range list {
+ if l == s {
+ return true
+ }
+ }
+
+ return false
+}
+
+type Dependency struct {
+ XMLName xml.Name `xml:"dependency"`
+
+ BpTarget string `xml:"-"`
+
+ GroupId string `xml:"groupId"`
+ ArtifactId string `xml:"artifactId"`
+ Version string `xml:"version"`
+ Type string `xml:"type"`
+ Scope string `xml:"scope"`
+}
+
+func (d Dependency) BpName() string {
+ if d.BpTarget == "" {
+ d.BpTarget = rewriteNames.MavenToBp(d.GroupId, d.ArtifactId)
+ }
+ return d.BpTarget
+}
+
+type Pom struct {
+ XMLName xml.Name `xml:"http://maven.apache.org/POM/4.0.0 project"`
+
+ PomFile string `xml:"-"`
+ ArtifactFile string `xml:"-"`
+ BpTarget string `xml:"-"`
+
+ GroupId string `xml:"groupId"`
+ ArtifactId string `xml:"artifactId"`
+ Version string `xml:"version"`
+ Packaging string `xml:"packaging"`
+
+ Dependencies []*Dependency `xml:"dependencies>dependency"`
+}
+
+func (p Pom) IsAar() bool {
+ return p.Packaging == "aar"
+}
+
+func (p Pom) IsJar() bool {
+ return p.Packaging == "jar"
+}
+
+func (p Pom) BpName() string {
+ if p.BpTarget == "" {
+ p.BpTarget = rewriteNames.MavenToBp(p.GroupId, p.ArtifactId)
+ }
+ return p.BpTarget
+}
+
+func (p Pom) BpJarDeps() []string {
+ return p.BpDeps("jar", []string{"compile", "runtime"})
+}
+
+func (p Pom) BpAarDeps() []string {
+ return p.BpDeps("aar", []string{"compile", "runtime"})
+}
+
+func (p Pom) BpExtraDeps() []string {
+ return extraDeps[p.BpName()]
+}
+
+// BpDeps obtains dependencies filtered by type and scope. The results of this
+// method are formatted as Android.bp targets, e.g. run through MavenToBp rules.
+func (p Pom) BpDeps(typeExt string, scopes []string) []string {
+ var ret []string
+ for _, d := range p.Dependencies {
+ if d.Type != typeExt || !InList(d.Scope, scopes) {
+ continue
+ }
+ name := rewriteNames.MavenToBp(d.GroupId, d.ArtifactId)
+ ret = append(ret, name)
+ }
+ return ret
+}
+
+func (p Pom) SdkVersion() string {
+ return sdkVersion
+}
+
+func (p *Pom) FixDeps(modules map[string]*Pom) {
+ for _, d := range p.Dependencies {
+ if d.Type == "" {
+ if depPom, ok := modules[d.BpName()]; ok {
+ // We've seen the POM for this dependency, use its packaging
+ // as the dependency type rather than Maven spec default.
+ d.Type = depPom.Packaging
+ } else {
+ // Dependency type was not specified and we don't have the POM
+ // for this artifact, use the default from Maven spec.
+ d.Type = "jar"
+ }
+ }
+ if d.Scope == "" {
+ // Scope was not specified, use the default from Maven spec.
+ d.Scope = "compile"
+ }
+ }
+}
+
+var bpTemplate = template.Must(template.New("bp").Parse(`
+{{if .IsAar}}android_library_import{{else}}java_import{{end}} {
+ name: "{{.BpName}}-nodeps",
+ {{if .IsAar}}aars{{else}}jars{{end}}: ["{{.ArtifactFile}}"],
+ sdk_version: "{{.SdkVersion}}",{{if .IsAar}}
+ static_libs: [{{range .BpAarDeps}}
+ "{{.}}",{{end}}{{range .BpExtraDeps}}
+ "{{.}}",{{end}}
+ ],{{end}}
+}
+
+{{if .IsAar}}android_library{{else}}java_library_static{{end}} {
+ name: "{{.BpName}}",
+ sdk_version: "{{.SdkVersion}}",{{if .IsAar}}
+ manifest: "manifests/{{.BpName}}/AndroidManifest.xml",{{end}}
+ static_libs: [
+ "{{.BpName}}-nodeps",{{range .BpJarDeps}}
+ "{{.}}",{{end}}{{range .BpAarDeps}}
+ "{{.}}",{{end}}{{range .BpExtraDeps}}
+ "{{.}}",{{end}}
+ ],
+ java_version: "1.7",
+}
+`))
+
+func parse(filename string) (*Pom, error) {
+ data, err := ioutil.ReadFile(filename)
+ if err != nil {
+ return nil, err
+ }
+
+ var pom Pom
+ err = xml.Unmarshal(data, &pom)
+ if err != nil {
+ return nil, err
+ }
+
+ if useVersion != "" && pom.Version != useVersion {
+ return nil, nil
+ }
+
+ if pom.Packaging == "" {
+ pom.Packaging = "jar"
+ }
+
+ pom.PomFile = filename
+ pom.ArtifactFile = strings.TrimSuffix(filename, ".pom") + "." + pom.Packaging
+
+ return &pom, nil
+}
+
+func rerunForRegen(filename string) error {
+ buf, err := ioutil.ReadFile(filename)
+ if err != nil {
+ return err
+ }
+
+ scanner := bufio.NewScanner(bytes.NewBuffer(buf))
+
+ // Skip the first line in the file
+ for i := 0; i < 2; i++ {
+ if !scanner.Scan() {
+ if scanner.Err() != nil {
+ return scanner.Err()
+ } else {
+ return fmt.Errorf("unexpected EOF")
+ }
+ }
+ }
+
+ // Extract the old args from the file
+ line := scanner.Text()
+ if strings.HasPrefix(line, "// pom2bp ") {
+ line = strings.TrimPrefix(line, "// pom2bp ")
+ } else if strings.HasPrefix(line, "// pom2mk ") {
+ line = strings.TrimPrefix(line, "// pom2mk ")
+ } else if strings.HasPrefix(line, "# pom2mk ") {
+ line = strings.TrimPrefix(line, "# pom2mk ")
+ } else {
+ return fmt.Errorf("unexpected second line: %q", line)
+ }
+ args := strings.Split(line, " ")
+ lastArg := args[len(args)-1]
+ args = args[:len(args)-1]
+
+ // Append all current command line args except -regen <file> to the ones from the file
+ for i := 1; i < len(os.Args); i++ {
+ if os.Args[i] == "-regen" {
+ i++
+ } else {
+ args = append(args, os.Args[i])
+ }
+ }
+ args = append(args, lastArg)
+
+ cmd := os.Args[0] + " " + strings.Join(args, " ")
+ // Re-exec pom2bp with the new arguments
+ output, err := exec.Command("/bin/sh", "-c", cmd).Output()
+ if exitErr, _ := err.(*exec.ExitError); exitErr != nil {
+ return fmt.Errorf("failed to run %s\n%s", cmd, string(exitErr.Stderr))
+ } else if err != nil {
+ return err
+ }
+
+ // If the old file was a .mk file, replace it with a .bp file
+ if filepath.Ext(filename) == ".mk" {
+ os.Remove(filename)
+ filename = strings.TrimSuffix(filename, ".mk") + ".bp"
+ }
+
+ return ioutil.WriteFile(filename, output, 0666)
+}
+
+func main() {
+ flag.Usage = func() {
+ fmt.Fprintf(os.Stderr, `pom2bp, a tool to create Android.bp files from maven repos
+
+The tool will extract the necessary information from *.pom files to create an Android.bp whose
+aar libraries can be linked against when using AAPT2.
+
+Usage: %s [--rewrite <regex>=<replace>] [-exclude <module>] [--extra-deps <module>=<module>[,<module>]] [<dir>] [-regen <file>]
+
+ -rewrite <regex>=<replace>
+ rewrite can be used to specify mappings between Maven projects and Android.bp modules. The -rewrite
+ option can be specified multiple times. When determining the Android.bp module for a given Maven
+ project, mappings are searched in the order they were specified. The first <regex> matching
+ either the Maven project's <groupId>:<artifactId> or <artifactId> will be used to generate
+ the Android.bp module name using <replace>. If no matches are found, <artifactId> is used.
+ -exclude <module>
+ Don't put the specified module in the Android.bp file.
+ -extra-deps <module>=<module>[,<module>]
+ Some Android.bp modules have transitive dependencies that must be specified when they are
+ depended upon (like android-support-v7-mediarouter requires android-support-v7-appcompat).
+ This may be specified multiple times to declare these dependencies.
+ -sdk-version <version>
+ Sets LOCAL_SDK_VERSION := <version> for all modules.
+ -use-version <version>
+ If the maven directory contains multiple versions of artifacts and their pom files,
+ -use-version can be used to only write Android.bp files for a specific version of those artifacts.
+ <dir>
+ The directory to search for *.pom files under.
+ The contents are written to stdout, to be put in the current directory (often as Android.bp)
+ -regen <file>
+ Read arguments from <file> and overwrite it (if it ends with .bp) or move it to .bp (if it
+ ends with .mk).
+
+`, os.Args[0])
+ }
+
+ var regen string
+
+ flag.Var(&excludes, "exclude", "Exclude module")
+ flag.Var(&extraDeps, "extra-deps", "Extra dependencies needed when depending on a module")
+ flag.Var(&rewriteNames, "rewrite", "Regex(es) to rewrite artifact names")
+ flag.StringVar(&sdkVersion, "sdk-version", "", "What to write to LOCAL_SDK_VERSION")
+ flag.StringVar(&useVersion, "use-version", "", "Only read artifacts of a specific version")
+ flag.Bool("static-deps", false, "Ignored")
+ flag.StringVar(®en, "regen", "", "Rewrite specified file")
+ flag.Parse()
+
+ if regen != "" {
+ err := rerunForRegen(regen)
+ if err != nil {
+ fmt.Fprintln(os.Stderr, err)
+ os.Exit(1)
+ }
+ os.Exit(0)
+ }
+
+ if flag.NArg() == 0 {
+ fmt.Fprintln(os.Stderr, "Directory argument is required")
+ os.Exit(1)
+ } else if flag.NArg() > 1 {
+ fmt.Fprintln(os.Stderr, "Multiple directories provided:", strings.Join(flag.Args(), " "))
+ os.Exit(1)
+ }
+
+ dir := flag.Arg(0)
+ absDir, err := filepath.Abs(dir)
+ if err != nil {
+ fmt.Fprintln(os.Stderr, "Failed to get absolute directory:", err)
+ os.Exit(1)
+ }
+
+ var filenames []string
+ err = filepath.Walk(absDir, func(path string, info os.FileInfo, err error) error {
+ if err != nil {
+ return err
+ }
+
+ name := info.Name()
+ if info.IsDir() {
+ if strings.HasPrefix(name, ".") {
+ return filepath.SkipDir
+ }
+ return nil
+ }
+
+ if strings.HasPrefix(name, ".") {
+ return nil
+ }
+
+ if strings.HasSuffix(name, ".pom") {
+ path, err = filepath.Rel(absDir, path)
+ if err != nil {
+ return err
+ }
+ filenames = append(filenames, filepath.Join(dir, path))
+ }
+ return nil
+ })
+ if err != nil {
+ fmt.Fprintln(os.Stderr, "Error walking files:", err)
+ os.Exit(1)
+ }
+
+ if len(filenames) == 0 {
+ fmt.Fprintln(os.Stderr, "Error: no *.pom files found under", dir)
+ os.Exit(1)
+ }
+
+ sort.Strings(filenames)
+
+ poms := []*Pom{}
+ modules := make(map[string]*Pom)
+ duplicate := false
+ for _, filename := range filenames {
+ pom, err := parse(filename)
+ if err != nil {
+ fmt.Fprintln(os.Stderr, "Error converting", filename, err)
+ os.Exit(1)
+ }
+
+ if pom != nil {
+ key := pom.BpName()
+ if excludes[key] {
+ continue
+ }
+
+ if old, ok := modules[key]; ok {
+ fmt.Fprintln(os.Stderr, "Module", key, "defined twice:", old.PomFile, pom.PomFile)
+ duplicate = true
+ }
+
+ poms = append(poms, pom)
+ modules[key] = pom
+ }
+ }
+ if duplicate {
+ os.Exit(1)
+ }
+
+ for _, pom := range poms {
+ pom.FixDeps(modules)
+ }
+
+ buf := &bytes.Buffer{}
+
+ fmt.Fprintln(buf, "// Automatically generated with:")
+ fmt.Fprintln(buf, "// pom2bp", strings.Join(proptools.ShellEscape(os.Args[1:]), " "))
+
+ for _, pom := range poms {
+ var err error
+ err = bpTemplate.Execute(buf, pom)
+ if err != nil {
+ fmt.Fprintln(os.Stderr, "Error writing", pom.PomFile, pom.BpName(), err)
+ os.Exit(1)
+ }
+ }
+
+ out, err := bpfix.Reformat(buf.String())
+ if err != nil {
+ fmt.Fprintln(os.Stderr, "Error formatting output", err)
+ os.Exit(1)
+ }
+
+ os.Stdout.WriteString(out)
+}