| 1 | //go:build windows |
| 2 | |
| 3 | package pathidentity |
| 4 | |
| 5 | import ( |
| 6 | "errors" |
| 7 | "os" |
| 8 | "os/exec" |
| 9 | "path/filepath" |
| 10 | "strings" |
| 11 | "testing" |
| 12 | ) |
| 13 | |
| 14 | func junctionFixture(t *testing.T) (string, string) { |
| 15 | t.Helper() |
| 16 | root := t.TempDir() |
| 17 | target, alias := filepath.Join(root, "target"), filepath.Join(root, "alias") |
| 18 | if err := os.Mkdir(target, 0o700); err != nil { |
| 19 | t.Fatal(err) |
| 20 | } |
| 21 | if out, err := exec.Command("cmd", "/c", "mklink", "/J", alias, target).CombinedOutput(); err != nil { |
| 22 | t.Fatalf("create junction: %v: %s", err, out) |
| 23 | } |
| 24 | return alias, target |
| 25 | } |
| 26 | |
| 27 | func TestResolveWindowsJunctionEntryChildrenAndMissingTail(t *testing.T) { |
| 28 | alias, target := junctionFixture(t) |
| 29 | if err := os.Mkdir(filepath.Join(target, "locks"), 0o700); err != nil { |
| 30 | t.Fatal(err) |
| 31 | } |
| 32 | if err := os.WriteFile(filepath.Join(target, "locks", "existing.lock"), nil, 0o600); err != nil { |
| 33 | t.Fatal(err) |
| 34 | } |
| 35 | for _, tail := range []string{"", "locks", `locks\existing.lock`, `locks\absent\new.lock`} { |
| 36 | t.Run(tail, func(t *testing.T) { |
| 37 | left, err := Resolve(filepath.Join(alias, tail), Options{FollowLeaf: true}) |
| 38 | if err != nil { |
| 39 | t.Fatal(err) |
| 40 | } |
| 41 | right, err := Resolve(filepath.Join(target, tail), Options{FollowLeaf: true}) |
| 42 | if err != nil || left.Key != right.Key || left.PhysicalPath != right.PhysicalPath { |
| 43 | t.Fatalf("alias=%+v target=%+v err=%v", left, right, err) |
| 44 | } |
| 45 | if left.AccessPath != filepath.Join(alias, tail) { |
| 46 | t.Fatal("access spelling changed") |
| 47 | } |
| 48 | }) |
| 49 | } |
| 50 | if _, err := os.Lstat(filepath.Join(target, "locks", "absent")); !os.IsNotExist(err) { |
| 51 | t.Fatalf("missing tail was created: %v", err) |
| 52 | } |
| 53 | } |
| 54 | |
| 55 | func TestResolveWindowsJunctionPreservesOnlyLeaf(t *testing.T) { |
| 56 | alias, target := junctionFixture(t) |
| 57 | entry, err := Resolve(alias, Options{FollowLeaf: false}) |
| 58 | if err != nil { |
| 59 | t.Fatal(err) |
| 60 | } |
| 61 | parent, err := Resolve(filepath.Dir(alias), Options{FollowLeaf: true}) |
| 62 | if err != nil || entry.PhysicalPath != filepath.Join(parent.PhysicalPath, filepath.Base(alias)) { |
| 63 | t.Fatalf("leaf entry followed: %+v, %v", entry, err) |
| 64 | } |
| 65 | child, err := Resolve(filepath.Join(alias, "child"), Options{FollowLeaf: false}) |
| 66 | real, realErr := Resolve(filepath.Join(target, "child"), Options{FollowLeaf: false}) |
| 67 | if err != nil || realErr != nil || child.Key != real.Key { |
| 68 | t.Fatalf("parent junction not resolved: %+v / %+v, %v / %v", child, real, err, realErr) |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | func TestResolveWindowsCrossVolumeJunction(t *testing.T) { |
| 73 | root := t.TempDir() |
| 74 | // GitHub's Windows runners place RUNNER_TEMP on the work drive and the |
| 75 | // process temp directory on the system drive. Local single-drive machines |
| 76 | // still execute the unconditional junction cases above. |
| 77 | other := os.Getenv("RUNNER_TEMP") |
| 78 | if !filepath.IsAbs(other) || strings.EqualFold(filepath.VolumeName(root), filepath.VolumeName(other)) { |
| 79 | if os.Getenv("GITHUB_ACTIONS") == "true" { |
| 80 | t.Fatal("Windows CI must provide temporary directories on two volumes") |
| 81 | } |
| 82 | t.Skip("no temporary directory on a second volume") |
| 83 | } |
| 84 | target, err := os.MkdirTemp(other, "reasonix-junction-*") |
| 85 | if err != nil { |
| 86 | t.Fatal(err) |
| 87 | } |
| 88 | t.Cleanup(func() { _ = os.RemoveAll(target) }) |
| 89 | alias := filepath.Join(root, "alias") |
| 90 | if out, err := exec.Command("cmd", "/c", "mklink", "/J", alias, target).CombinedOutput(); err != nil { |
| 91 | t.Fatalf("create cross-volume junction: %v: %s", err, out) |
| 92 | } |
| 93 | for _, tail := range []string{"", `missing\new.lock`} { |
| 94 | left, err := Resolve(filepath.Join(alias, tail), Options{FollowLeaf: true}) |
| 95 | right, rightErr := Resolve(filepath.Join(target, tail), Options{FollowLeaf: true}) |
| 96 | if err != nil || rightErr != nil || left.Key != right.Key || left.PhysicalPath != right.PhysicalPath { |
| 97 | t.Fatalf("cross-volume identity split: %+v / %+v, %v / %v", left, right, err, rightErr) |
| 98 | } |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | func TestResolveWindowsRejectsDanglingJunction(t *testing.T) { |
| 103 | alias, target := junctionFixture(t) |
| 104 | if err := os.Remove(target); err != nil { |
| 105 | t.Fatal(err) |
| 106 | } |
| 107 | for _, path := range []string{alias, filepath.Join(alias, "missing.lock")} { |
| 108 | _, err := Resolve(path, Options{FollowLeaf: true}) |
| 109 | var failure *Error |
| 110 | if !errors.As(err, &failure) || failure.Stage != "physical" || failure.Kind != ErrorUnavailable { |
| 111 | t.Fatalf("dangling junction accepted: %q, %v", path, err) |
| 112 | } |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | func TestResolveWindowsLongPath(t *testing.T) { |
| 117 | path := t.TempDir() |
| 118 | for len(path) < 300 { |
| 119 | path = filepath.Join(path, strings.Repeat("a", 40)) |
| 120 | } |
| 121 | if err := os.MkdirAll(path, 0o700); err != nil { |
| 122 | t.Fatal(err) |
| 123 | } |
| 124 | plain, err := Resolve(path, Options{FollowLeaf: true}) |
| 125 | extended, extendedErr := Resolve(extendedWindowsPath(path), Options{FollowLeaf: true}) |
| 126 | if err != nil || extendedErr != nil || plain.Key != extended.Key { |
| 127 | t.Fatalf("long path identity: %+v / %+v, %v / %v", plain, extended, err, extendedErr) |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | func TestWindowsNativePathSpelling(t *testing.T) { |
| 132 | for _, pair := range [][2]string{ |
| 133 | {`C:\dir`, `\\?\C:\dir`}, |
| 134 | {`\\server\share\dir`, `\\?\UNC\server\share\dir`}, |
| 135 | {`\\?\Volume{test}\dir`, `\\?\Volume{test}\dir`}, |
| 136 | } { |
| 137 | if got := extendedWindowsPath(pair[0]); got != pair[1] { |
| 138 | t.Errorf("extend %q = %q", pair[0], got) |
| 139 | } |
| 140 | if got, want := ntPhysicalPath(pair[0]), `\??\`+pair[1][4:]; got != want { |
| 141 | t.Errorf("NT path %q = %q, want %q", pair[0], got, want) |
| 142 | } |
| 143 | if got := stripExtendedPrefix(pair[1]); got != pair[0] { |
| 144 | t.Errorf("strip %q = %q", pair[1], got) |
| 145 | } |
| 146 | } |
| 147 | } |
| 148 |