Bump version to 1.0.48

Makefile

@@ -1,5 +1,5 @@
 BINARY=syncserver
-VERSION?=1.0.47
+VERSION?=1.0.48
 GO?=go
 LDFLAGS=-s -w -X main.version=$(VERSION) -X main.commit=$(shell git rev-parse --short HEAD 2>/dev/null || echo unknown)
 BUILD_FLAGS=CGO_ENABLED=0

cmd/server/main.go

@@ -20,7 +20,7 @@ import (
 	"github.com/syncserver/internal/syncengine"
 )
 
-var version = "1.0.47"
+var version = "1.0.48"
 
 func main() {
 	cfgPath := flag.String("config", "", "Path to config.yaml")

internal/syncengine/rsync_runner.go

@@ -69,15 +69,28 @@ func (r *RsyncRunner) buildArgs(pair *SyncPairConfig) []string {
 		args = append(args, "--delete")
 	}
 
+	src := ensureDirSlash(pair.Source)
 	if pair.Direction == "pull" {
-		args = append(args, pair.Dest, pair.Source)
+		args = append(args, pair.Dest, src)
 	} else {
-		args = append(args, pair.Source, pair.Dest)
+		args = append(args, src, pair.Dest)
 	}
 
 	return args
 }
 
+// ensureDirSlash guarantees the source path is treated by rsync as a
+// directory whose contents are copied, regardless of whether the user
+// supplied a trailing slash. This avoids the common foot-gun where
+// "rsync host:/path/series /dest/" creates /dest/series/<contents> nested
+// inside an extra "series" subdirectory.
+func ensureDirSlash(p string) string {
+	if strings.HasSuffix(p, "/") {
+		return p
+	}
+	return p + "/"
+}
+
 type MachineKeys struct {
 	Host    string
 	Port    int

internal/syncengine/rsync_runner_test.go

@@ -40,8 +40,8 @@ func TestBuildArgs_Push(t *testing.T) {
 	if args[0] != "-aP" {
 		t.Errorf("first flag = %q, want %q", args[0], "-aP")
 	}
-	if args[len(args)-2] != "/local/src" {
-		t.Errorf("source = %q, want %q", args[len(args)-2], "/local/src")
+	if args[len(args)-2] != "/local/src/" {
+		t.Errorf("source = %q, want %q (auto-appended trailing slash)", args[len(args)-2], "/local/src/")
 	}
 	if args[len(args)-1] != "admin@10.5.0.144:/remote/dst" {
 		t.Errorf("dest = %q, want %q", args[len(args)-1], "admin@10.5.0.144:/remote/dst")
@@ -61,8 +61,8 @@ func TestBuildArgs_Pull(t *testing.T) {
 	if args[len(args)-2] != "/local/dst" {
 		t.Errorf("pull: second-to-last (dest) = %q, want %q", args[len(args)-2], "/local/dst")
 	}
-	if args[len(args)-1] != "admin@10.5.0.144:/remote/src" {
-		t.Errorf("pull: last (source) = %q, want %q", args[len(args)-1], "admin@10.5.0.144:/remote/src")
+	if args[len(args)-1] != "admin@10.5.0.144:/remote/src/" {
+		t.Errorf("pull: last (source) = %q, want %q (auto-appended trailing slash)", args[len(args)-1], "admin@10.5.0.144:/remote/src/")
 	}
 }
 
@@ -162,8 +162,8 @@ func TestRunRemote_PushSrcAndDestStayAsIs(t *testing.T) {
 	}
 	srcArg, dstArg := tc.build()
 
-	if srcArg != "/share/homes/admin/media" {
-		t.Errorf("push src = %q, want raw path '/share/homes/admin/media' (no user@host: prefix added)", srcArg)
+	if srcArg != "/share/homes/admin/media/" {
+		t.Errorf("push src = %q, want '/share/homes/admin/media/' (auto-appended trailing slash, no user@host: prefix added)", srcArg)
 	}
 	if dstArg != "/share/media/peliculas" {
 		t.Errorf("push dst = %q, want raw path '/share/media/peliculas'", dstArg)
@@ -193,6 +193,80 @@ func TestRunRemote_PullSrcAndDestStayAsIs(t *testing.T) {
 	}
 }
 
+func TestBuildArgs_AutoAppendsTrailingSlashToSource(t *testing.T) {
+	cases := []struct {
+		name     string
+		source   string
+		dest     string
+		direction string
+		wantSrc  string
+	}{
+		{
+			name:      "push, source without trailing slash",
+			source:    "/mnt/storage/multimedia/series",
+			dest:      "/share/media/series",
+			direction: "push",
+			wantSrc:   "/mnt/storage/multimedia/series/",
+		},
+		{
+			name:      "push, source already has trailing slash (idempotent)",
+			source:    "/mnt/storage/multimedia/series/",
+			dest:      "/share/media/series",
+			direction: "push",
+			wantSrc:   "/mnt/storage/multimedia/series/",
+		},
+		{
+			name:      "push, remote source without trailing slash",
+			source:    "admin@baby-nas:/mnt/storage/multimedia/series",
+			dest:      "/share/media/series",
+			direction: "push",
+			wantSrc:   "admin@baby-nas:/mnt/storage/multimedia/series/",
+		},
+		{
+			name:      "pull, source without trailing slash",
+			source:    "admin@baby-nas:/mnt/storage/multimedia/series",
+			dest:      "/share/media/series",
+			direction: "pull",
+			wantSrc:   "admin@baby-nas:/mnt/storage/multimedia/series/",
+		},
+		{
+			name:      "mirror, source without trailing slash",
+			source:    "/mnt/storage/multimedia/series",
+			dest:      "admin@10.5.0.144:/share/media/series",
+			direction: "mirror",
+			wantSrc:   "/mnt/storage/multimedia/series/",
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			runner := NewRsyncRunner("/tmp/ssh", "")
+			pair := &SyncPairConfig{
+				Source:    tc.source,
+				Dest:      tc.dest,
+				Direction: tc.direction,
+			}
+			args := runner.buildArgs(pair)
+
+			var gotSrc, gotDest string
+			if tc.direction == "pull" {
+				gotDest = args[len(args)-2]
+				gotSrc = args[len(args)-1]
+			} else {
+				gotSrc = args[len(args)-2]
+				gotDest = args[len(args)-1]
+			}
+
+			if gotSrc != tc.wantSrc {
+				t.Errorf("source = %q, want %q (dest must never be touched)", gotSrc, tc.wantSrc)
+			}
+			if gotDest != tc.dest {
+				t.Errorf("dest = %q, want %q (dest must never be normalized)", gotDest, tc.dest)
+			}
+		})
+	}
+}
+
 func countOccurrences(s, substr string) int {
 	return strings.Count(s, substr)
 }

web/src/pages/SyncPairs.tsx

@@ -375,6 +375,9 @@ export default function SyncPairs() {
                       setForm({ ...form, source_path: e.target.value })
                     }
                   />
+                  <p className="text-xs text-fg-subtle">
+                    Directory on the source machine. Its <span className="font-medium">contents</span> will be copied into the destination. Trailing <code className="font-mono">/</code> is optional.
+                  </p>
                 </div>
                 <div className="space-y-1.5">
                   <Label htmlFor="sp-dest-path" required>
@@ -388,6 +391,9 @@ export default function SyncPairs() {
                       setForm({ ...form, dest_path: e.target.value })
                     }
                   />
+                  <p className="text-xs text-fg-subtle">
+                    Directory on the destination machine where the source contents will land.
+                  </p>
                 </div>
               </div>
               <div className="grid grid-cols-2 gap-3">