4 files changed, 40 insertions, 50 deletions
diff --git a/forged/internal/misc/misc.go b/forged/internal/misc/misc.go
index 398020a..e9e10ab 100644
--- a/forged/internal/misc/misc.go
+++ b/forged/internal/misc/misc.go
@@ -3,16 +3,3 @@
 
 // Package misc provides miscellaneous functions and other definitions.
 package misc
-
-import "strings"
-
-// sliceContainsNewlines returns true if and only if the given slice contains
-// one or more strings that contains newlines.
-func SliceContainsNewlines(s []string) bool {
-	for _, v := range s {
-		if strings.Contains(v, "\n") {
-			return true
-		}
-	}
-	return false
-}
diff --git a/forged/internal/misc/slices.go b/forged/internal/misc/slices.go
new file mode 100644
index 0000000..3ad0211
--- /dev/null
+++ b/forged/internal/misc/slices.go
@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: AGPL-3.0-only
+// SPDX-FileCopyrightText: Copyright (c) 2025 Runxi Yu <https://runxiyu.org>
+
+package misc
+
+import "strings"
+
+// sliceContainsNewlines returns true if and only if the given slice contains
+// one or more strings that contains newlines.
+func SliceContainsNewlines(s []string) bool {
+	for _, v := range s {
+		if strings.Contains(v, "\n") {
+			return true
+		}
+	}
+	return false
+}
diff --git a/forged/internal/misc/url.go b/forged/internal/misc/url.go
index 0f9dc04..346ff76 100644
--- a/forged/internal/misc/url.go
+++ b/forged/internal/misc/url.go
@@ -4,48 +4,11 @@
 package misc
 
 import (
-	"errors"
 	"net/http"
 	"net/url"
 	"strings"
 )
 
-var (
-	ErrDupRefSpec = errors.New("duplicate ref spec")
-	ErrNoRefSpec  = errors.New("no ref spec")
-)
-
-// getParamRefTypeName looks at the query parameters in an HTTP request and
-// returns its ref name and type, if any.
-func GetParamRefTypeName(request *http.Request) (retRefType, retRefName string, err error) {
-	rawQuery := request.URL.RawQuery
-	queryValues, err := url.ParseQuery(rawQuery)
-	if err != nil {
-		return
-	}
-	done := false
-	for _, refType := range []string{"commit", "branch", "tag"} {
-		refName, ok := queryValues[refType]
-		if ok {
-			if done {
-				err = ErrDupRefSpec
-				return
-			}
-			done = true
-			if len(refName) != 1 {
-				err = ErrDupRefSpec
-				return
-			}
-			retRefName = refName[0]
-			retRefType = refType
-		}
-	}
-	if !done {
-		err = ErrNoRefSpec
-	}
-	return
-}
-
 // ParseReqURI parses an HTTP request URL, and returns a slice of path segments
 // and the query parameters. It handles %2F correctly.
 func ParseReqURI(requestURI string) (segments []string, params url.Values, err error) {
diff --git a/forged/internal/misc/usock.go b/forged/internal/misc/usock.go
new file mode 100644
index 0000000..357fa43
--- /dev/null
+++ b/forged/internal/misc/usock.go
@@ -0,0 +1,23 @@
+package misc
+
+import (
+	"errors"
+	"fmt"
+	"net"
+	"syscall"
+)
+
+func ListenUnixSocket(path string) (listener net.Listener, replaced bool, err error) {
+	listener, err = net.Listen("unix", path)
+	if errors.Is(err, syscall.EADDRINUSE) {
+		replaced = true
+		if unlinkErr := syscall.Unlink(path); unlinkErr != nil {
+			return listener, false, fmt.Errorf("remove existing socket %q: %w", path, unlinkErr)
+		}
+		listener, err = net.Listen("unix", path)
+	}
+	if err != nil {
+		return listener, replaced, fmt.Errorf("listen on unix socket %q: %w", path, err)
+	}
+	return listener, replaced, nil
+}