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fix: override DNS resolver for CGO_ENABLED=0 Android builds

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The pure-Go DNS resolver falls back to [::1]:53 on Android because
/etc/resolv.conf does not exist, causing all hostname-based API calls
to fail. Use 8.8.8.8:53 via net.DefaultResolver.Dial as fallback.
When CGO is enabled (Termux), the cgo resolver is used and this
override is never called.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
KoheiYamashita 2026-03-01 03:48:59 +09:00
parent 3b3c3bc884
commit c0babbc643
1 changed files with 11 additions and 0 deletions
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11
cmd/clawdroid/main.go
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@ -13,6 +13,7 @@ import (
"fmt" "fmt"
"io" "io"
"io/fs" "io/fs"
"net"
"os" "os"
"os/signal" "os/signal"
"path/filepath" "path/filepath"
@ -114,6 +115,16 @@ func copyDirectory(src, dst string) error {
}) })
} }
func init() {
// Override DNS resolver for CGO_ENABLED=0 builds (Android APK).
// The pure-Go resolver falls back to [::1]:53 on Android because
// /etc/resolv.conf does not exist. When CGO is enabled (Termux),
// the cgo resolver is used instead and this Dial is never called.
net.DefaultResolver.Dial = func(ctx context.Context, network, address string) (net.Conn, error) {
return (&net.Dialer{}).DialContext(ctx, "udp", "8.8.8.8:53")
}
}
func main() { func main() {
if len(os.Args) < 2 { if len(os.Args) < 2 {
printHelp() printHelp()