report: add get maintainers function

2 files changed, 42 insertions, 2 deletions

diff --git a/pkg/git/git.go b/pkg/git/git.go
index 5c91c6040..29ebcbadc 100644
--- a/pkg/git/git.go
+++ b/pkg/git/git.go
@@ -36,7 +36,7 @@ func Poll(dir, repo, branch string) (string, error) {
 			return "", err
 		}
 	}
-	if _, err := osutil.RunCmd(timeout, dir, "git", "fetch", "--no-tags", "--depth", "1"); err != nil {
+	if _, err := osutil.RunCmd(timeout, dir, "git", "fetch", "--no-tags"); err != nil {
 		// Something else is wrong, re-clone.
 		if err := clone(dir, repo, branch); err != nil {
 			return "", err
@@ -58,7 +58,6 @@ func clone(dir, repo, branch string) error {
 	args := []string{
 		"clone",
 		repo,
-		"--depth", "1",
 		"--single-branch",
 		"--branch", branch,
 		dir,
diff --git a/pkg/report/guilty.go b/pkg/report/guilty.go
index 087d2f275..272f63063 100644
--- a/pkg/report/guilty.go
+++ b/pkg/report/guilty.go
@@ -4,8 +4,12 @@
 package report
 
 import (
+	"net/mail"
 	"regexp"
 	"strings"
+	"time"
+
+	"github.com/google/syzkaller/pkg/osutil"
 )
 
 var (
@@ -52,3 +56,40 @@ nextFile:
 	}
 	return ""
 }
+
+func getMaintainersImpl(linux, file string, blame bool) ([]string, error) {
+	// ./scripts/get_maintainer.pl is a Linux kernel script.
+	args := []string{"--no-n", "--no-rolestats"}
+	if blame {
+		args = append(args, "--git-blame")
+	}
+	args = append(args, file)
+	output, err := osutil.RunCmd(time.Minute, linux, "./scripts/get_maintainer.pl", args...)
+	if err != nil {
+		return nil, err
+	}
+	lines := strings.Split(string(output), "\n")
+	var mtrs []string
+	for _, line := range lines {
+		addr, err := mail.ParseAddress(line)
+		if err != nil {
+			continue
+		}
+		mtrs = append(mtrs, addr.Address)
+	}
+	return mtrs, nil
+}
+
+func GetMaintainers(linux, file string) ([]string, error) {
+	mtrs, err := getMaintainersImpl(linux, file, false)
+	if err != nil {
+		return nil, err
+	}
+	if len(mtrs) <= 1 {
+		mtrs, err = getMaintainersImpl(linux, file, true)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return mtrs, nil
+}