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Commit | Line | Data |
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bae9f6d2 JC |
1 | // +build windows |
2 | ||
3 | package getter | |
4 | ||
5 | import ( | |
6 | "fmt" | |
bae9f6d2 JC |
7 | "net/url" |
8 | "os" | |
9 | "os/exec" | |
10 | "path/filepath" | |
11 | "strings" | |
107c1cdb | 12 | "syscall" |
bae9f6d2 JC |
13 | ) |
14 | ||
15 | func (g *FileGetter) Get(dst string, u *url.URL) error { | |
107c1cdb | 16 | ctx := g.Context() |
bae9f6d2 JC |
17 | path := u.Path |
18 | if u.RawPath != "" { | |
19 | path = u.RawPath | |
20 | } | |
21 | ||
22 | // The source path must exist and be a directory to be usable. | |
23 | if fi, err := os.Stat(path); err != nil { | |
24 | return fmt.Errorf("source path error: %s", err) | |
25 | } else if !fi.IsDir() { | |
26 | return fmt.Errorf("source path must be a directory") | |
27 | } | |
28 | ||
29 | fi, err := os.Lstat(dst) | |
30 | if err != nil && !os.IsNotExist(err) { | |
31 | return err | |
32 | } | |
33 | ||
34 | // If the destination already exists, it must be a symlink | |
35 | if err == nil { | |
36 | mode := fi.Mode() | |
37 | if mode&os.ModeSymlink == 0 { | |
38 | return fmt.Errorf("destination exists and is not a symlink") | |
39 | } | |
40 | ||
41 | // Remove the destination | |
42 | if err := os.Remove(dst); err != nil { | |
43 | return err | |
44 | } | |
45 | } | |
46 | ||
47 | // Create all the parent directories | |
48 | if err := os.MkdirAll(filepath.Dir(dst), 0755); err != nil { | |
49 | return err | |
50 | } | |
51 | ||
52 | sourcePath := toBackslash(path) | |
53 | ||
54 | // Use mklink to create a junction point | |
107c1cdb | 55 | output, err := exec.CommandContext(ctx, "cmd", "/c", "mklink", "/J", dst, sourcePath).CombinedOutput() |
bae9f6d2 JC |
56 | if err != nil { |
57 | return fmt.Errorf("failed to run mklink %v %v: %v %q", dst, sourcePath, err, output) | |
58 | } | |
59 | ||
60 | return nil | |
61 | } | |
62 | ||
63 | func (g *FileGetter) GetFile(dst string, u *url.URL) error { | |
107c1cdb | 64 | ctx := g.Context() |
bae9f6d2 JC |
65 | path := u.Path |
66 | if u.RawPath != "" { | |
67 | path = u.RawPath | |
68 | } | |
69 | ||
70 | // The source path must exist and be a directory to be usable. | |
71 | if fi, err := os.Stat(path); err != nil { | |
72 | return fmt.Errorf("source path error: %s", err) | |
73 | } else if fi.IsDir() { | |
74 | return fmt.Errorf("source path must be a file") | |
75 | } | |
76 | ||
77 | _, err := os.Lstat(dst) | |
78 | if err != nil && !os.IsNotExist(err) { | |
79 | return err | |
80 | } | |
81 | ||
82 | // If the destination already exists, it must be a symlink | |
83 | if err == nil { | |
84 | // Remove the destination | |
85 | if err := os.Remove(dst); err != nil { | |
86 | return err | |
87 | } | |
88 | } | |
89 | ||
90 | // Create all the parent directories | |
91 | if err := os.MkdirAll(filepath.Dir(dst), 0755); err != nil { | |
92 | return err | |
93 | } | |
94 | ||
95 | // If we're not copying, just symlink and we're done | |
96 | if !g.Copy { | |
107c1cdb ND |
97 | if err = os.Symlink(path, dst); err == nil { |
98 | return err | |
99 | } | |
100 | lerr, ok := err.(*os.LinkError) | |
101 | if !ok { | |
102 | return err | |
103 | } | |
104 | switch lerr.Err { | |
105 | case syscall.ERROR_PRIVILEGE_NOT_HELD: | |
106 | // no symlink privilege, let's | |
107 | // fallback to a copy to avoid an error. | |
108 | break | |
109 | default: | |
110 | return err | |
111 | } | |
bae9f6d2 JC |
112 | } |
113 | ||
114 | // Copy | |
115 | srcF, err := os.Open(path) | |
116 | if err != nil { | |
117 | return err | |
118 | } | |
119 | defer srcF.Close() | |
120 | ||
121 | dstF, err := os.Create(dst) | |
122 | if err != nil { | |
123 | return err | |
124 | } | |
125 | defer dstF.Close() | |
126 | ||
107c1cdb | 127 | _, err = Copy(ctx, dstF, srcF) |
bae9f6d2 JC |
128 | return err |
129 | } | |
130 | ||
131 | // toBackslash returns the result of replacing each slash character | |
132 | // in path with a backslash ('\') character. Multiple separators are | |
133 | // replaced by multiple backslashes. | |
134 | func toBackslash(path string) string { | |
135 | return strings.Replace(path, "/", "\\", -1) | |
136 | } |