Add pom2mk, a maven repo -> Android.mk tool
This is still fairly simplistic, but good enough to test some build
system changes.
Bug: 33381544
Test: run, inspect output
Change-Id: Ia5c19570493116dca01cb65605cdf20becf8c1d0
diff --git a/cmd/pom2mk/Android.bp b/cmd/pom2mk/Android.bp
new file mode 100644
index 0000000..54422b1
--- /dev/null
+++ b/cmd/pom2mk/Android.bp
@@ -0,0 +1,19 @@
+// 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.
+
+blueprint_go_binary {
+ name: "pom2mk",
+ deps: ["blueprint-proptools"],
+ srcs: ["pom2mk.go"],
+}
diff --git a/cmd/pom2mk/pom2mk.go b/cmd/pom2mk/pom2mk.go
new file mode 100644
index 0000000..e6144a5
--- /dev/null
+++ b/cmd/pom2mk/pom2mk.go
@@ -0,0 +1,254 @@
+// 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 (
+ "encoding/xml"
+ "flag"
+ "fmt"
+ "io"
+ "io/ioutil"
+ "os"
+ "path/filepath"
+ "regexp"
+ "sort"
+ "strings"
+ "text/template"
+
+ "github.com/google/blueprint/proptools"
+)
+
+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) Rewrite(name string) string {
+ for _, r := range *r {
+ if r.regexp.MatchString(name) {
+ return r.regexp.ReplaceAllString(name, r.repl)
+ }
+ }
+ return name
+}
+
+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 Dependency struct {
+ XMLName xml.Name `xml:"dependency"`
+
+ GroupId string `xml:"groupId"`
+ ArtifactId string `xml:"artifactId"`
+ Version string `xml:"version"`
+ Type string `xml:"type"`
+
+ Scope string `xml:"scope"`
+}
+
+type Pom struct {
+ XMLName xml.Name `xml:"http://maven.apache.org/POM/4.0.0 project"`
+
+ ArtifactFile 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) MkName() string {
+ return rewriteNames.Rewrite(p.ArtifactId)
+}
+
+func (p Pom) MkDeps() []string {
+ var ret []string
+ for _, d := range p.Dependencies {
+ if d.Type != "aar" {
+ continue
+ }
+ name := rewriteNames.Rewrite(d.ArtifactId)
+ ret = append(ret, name)
+ ret = append(ret, extraDeps[name]...)
+ }
+ return ret
+}
+
+var mkTemplate = template.Must(template.New("mk").Parse(`
+include $(CLEAR_VARS)
+LOCAL_MODULE := {{.MkName}}
+LOCAL_MODULE_CLASS := JAVA_LIBRARIES
+LOCAL_UNINSTALLABLE_MODULE := true
+LOCAL_SRC_FILES := {{.ArtifactFile}}
+LOCAL_BUILT_MODULE_STEM := javalib.jar
+LOCAL_MODULE_SUFFIX := .{{.Packaging}}
+LOCAL_USE_AAPT2 := true
+LOCAL_STATIC_ANDROID_LIBRARIES := \
+{{range .MkDeps}} {{.}} \
+{{end}}
+include $(BUILD_PREBUILT)
+`))
+
+func convert(filename string, out io.Writer) error {
+ data, err := ioutil.ReadFile(filename)
+ if err != nil {
+ return err
+ }
+
+ var pom Pom
+ err = xml.Unmarshal(data, &pom)
+ if err != nil {
+ return err
+ }
+
+ if pom.Packaging == "" {
+ pom.Packaging = "jar"
+ }
+
+ pom.ArtifactFile = strings.TrimSuffix(filename, ".pom") + "." + pom.Packaging
+
+ return mkTemplate.Execute(out, pom)
+}
+
+func main() {
+ flag.Usage = func() {
+ fmt.Fprintf(os.Stderr, `pom2mk, a tool to create Android.mk files from maven repos
+
+The tool will extract the necessary information from *.pom files to create an Android.mk whose
+aar libraries can be linked against when using AAPT2.
+
+Usage: %s [--rewrite <regex>=<replace>] [--extra-deps <module>=<module>[,<module>]] <dir>
+
+ -rewrite <regex>=<replace>
+ rewrite can be used to specify mappings between the artifactId in the pom files and module
+ names in the Android.mk files. This can be specified multiple times, the first matching
+ regex will be used.
+ -extra-deps <module>=<module>[,<module>]
+ Some Android.mk 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.
+ <dir>
+ The directory to search for *.pom files under.
+
+The makefile is written to stdout, to be put in the current directory (often as Android.mk)
+`, os.Args[0])
+ }
+
+ flag.Var(&extraDeps, "extra-deps", "Extra dependencies needed when depending on a module")
+ flag.Var(&rewriteNames, "rewrite", "Regex(es) to rewrite artifact names")
+ flag.Parse()
+
+ if flag.NArg() != 1 {
+ flag.Usage()
+ os.Exit(1)
+ }
+
+ dir := flag.Arg(0)
+ absDir, err := filepath.Abs(dir)
+ if err != nil {
+ fmt.Println(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)
+
+ fmt.Println("# Automatically generated with:")
+ fmt.Println("# pom2mk", strings.Join(proptools.ShellEscape(os.Args[1:]), " "))
+ fmt.Println("LOCAL_PATH := $(call my-dir)")
+
+ for _, filename := range filenames {
+ err := convert(filename, os.Stdout)
+ if err != nil {
+ fmt.Fprintln(os.Stderr, "Error converting", filename, err)
+ os.Exit(1)
+ }
+ }
+}