fix get_xid for cross compilation

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

pkg/file/get_xid.go

@@ -0,0 +1,21 @@
+//go:build linux || darwin || netbsd
+// +build linux darwin netbsd
+
+package file
+
+import (
+	"os"
+	"syscall"
+)
+
+// getXid is the UID GID system info for unix
+func getXid(info os.FileInfo) (uid, gid int) {
+	uid = -1
+	gid = -1
+	if stat, ok := info.Sys().(*syscall.Stat_t); ok {
+		uid = int(stat.Uid)
+		gid = int(stat.Gid)
+	}
+
+	return uid, gid
+}

pkg/file/get_xid_win.go

@@ -0,0 +1,13 @@
+//go:build windows
+// +build windows
+
+package file
+
+import (
+	"os"
+)
+
+// getXid is a placeholder for windows file information
+func getXid(info os.FileInfo) (uid, gid int) {
+	return -1, -1
+}

pkg/file/metadata.go

@@ -2,13 +2,11 @@ package file
 
 import (
 	"archive/tar"
+	"github.com/anchore/stereoscope/internal/log"
 	"io"
 	"os"
 	"path"
 	"path/filepath"
-	"syscall"
-
-	"github.com/anchore/stereoscope/internal/log"
 
 	"github.com/sylabs/squashfs"
 )
@@ -126,15 +124,3 @@ func NewMetadataFromPath(path string, info os.FileInfo) Metadata {
 		IsDir:    info.IsDir(),
 	}
 }
-
-// getXid is the UID GID system info for unix
-func getXid(info os.FileInfo) (uid, gid int) {
-	uid = -1
-	gid = -1
-	if stat, ok := info.Sys().(*syscall.Stat_t); ok {
-		uid = int(stat.Uid)
-		gid = int(stat.Gid)
-	}
-
-	return uid, gid
-}