hst/fslink: improve string representation

This shortens the representation of most common use cases and generally improves readability.

Signed-off-by: Ophestra <cat@gensokyo.uk>

cmd/hakurei/print_test.go

@@ -51,8 +51,8 @@ Filesystem
  w+ephemeral(-rwxr-xr-x):/tmp/
  w*/nix/store:/mnt-root/nix/.rw-store/upper:/mnt-root/nix/.rw-store/work:/mnt-root/nix/.ro-store
  */nix/store
- &/run/current-system:*/run/current-system
+ /run/current-system@
- &/run/opengl-driver:*/run/opengl-driver
+ /run/opengl-driver@
  w*/var/lib/hakurei/u0/org.chromium.Chromium:/data/data/org.chromium.Chromium
  d+/dev/dri
 
@@ -128,8 +128,8 @@ Filesystem
  w+ephemeral(-rwxr-xr-x):/tmp/
  w*/nix/store:/mnt-root/nix/.rw-store/upper:/mnt-root/nix/.rw-store/work:/mnt-root/nix/.ro-store
  */nix/store
- &/run/current-system:*/run/current-system
+ /run/current-system@
- &/run/opengl-driver:*/run/opengl-driver
+ /run/opengl-driver@
  w*/var/lib/hakurei/u0/org.chromium.Chromium:/data/data/org.chromium.Chromium
  d+/dev/dri
 

hst/fslink.go

@@ -50,9 +50,12 @@ func (l *FSLink) String() string {
 		return "<invalid>"
 	}
 
-	dereference := ""
+	var dereference string
 	if l.Dereference {
+		if l.Target.String() == l.Linkname {
+			return l.Target.String() + "@"
+		}
 		dereference = "*"
 	}
-	return "&" + l.Target.String() + ":" + dereference + l.Linkname
+	return l.Target.String() + " -> " + dereference + l.Linkname
 }

hst/fslink_test.go

@@ -12,7 +12,20 @@ func TestFSLink(t *testing.T) {
 		{"nil", (*hst.FSLink)(nil), false, nil, nil, nil, "<invalid>"},
 		{"zero", new(hst.FSLink), false, nil, nil, nil, "<invalid>"},
 
-		{"deref rel", &hst.FSLink{Target: m("/"), Linkname: ":3", Dereference: true}, false, nil, nil, nil, "<invalid>"},
+		{"deref rel", &hst.FSLink{Target: m("/"), Linkname: ":3", Dereference: true},
+			false, nil, nil, nil, "<invalid>"},
+		{"deref differs", &hst.FSLink{
+			Target:      m("/.hakurei/etc"),
+			Linkname:    "/etc/static",
+			Dereference: true,
+		}, true, container.Ops{
+			&container.SymlinkOp{
+				Target:      m("/.hakurei/etc"),
+				LinkName:    "/etc/static",
+				Dereference: true,
+			},
+		}, m("/.hakurei/etc"), nil,
+			"/.hakurei/etc -> */etc/static"},
 		{"deref", &hst.FSLink{
 			Target:      m("/run/current-system"),
 			Linkname:    "/run/current-system",
@@ -24,7 +37,7 @@ func TestFSLink(t *testing.T) {
 				Dereference: true,
 			},
 		}, m("/run/current-system"), nil,
-			"&/run/current-system:*/run/current-system"},
+			"/run/current-system@"},
 
 		{"direct", &hst.FSLink{
 			Target:   m("/etc/mtab"),
@@ -34,7 +47,7 @@ func TestFSLink(t *testing.T) {
 				Target:   m("/etc/mtab"),
 				LinkName: "/proc/mounts",
 			},
-		}, m("/etc/mtab"), nil, "&/etc/mtab:/proc/mounts"},
+		}, m("/etc/mtab"), nil, "/etc/mtab -> /proc/mounts"},
 
 		{"direct rel", &hst.FSLink{
 			Target:   m("/etc/mtab"),
@@ -44,6 +57,6 @@ func TestFSLink(t *testing.T) {
 				Target:   m("/etc/mtab"),
 				LinkName: "../proc/mounts",
 			},
-		}, m("/etc/mtab"), nil, "&/etc/mtab:../proc/mounts"},
+		}, m("/etc/mtab"), nil, "/etc/mtab -> ../proc/mounts"},
 	})
 }