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bae9f6d2 JC |
1 | package module |
2 | ||
3 | import ( | |
4 | "io/ioutil" | |
5 | "os" | |
15c0b25d | 6 | "path/filepath" |
bae9f6d2 JC |
7 | |
8 | "github.com/hashicorp/go-getter" | |
9 | ) | |
10 | ||
11 | // GetMode is an enum that describes how modules are loaded. | |
12 | // | |
13 | // GetModeLoad says that modules will not be downloaded or updated, they will | |
14 | // only be loaded from the storage. | |
15 | // | |
16 | // GetModeGet says that modules can be initially downloaded if they don't | |
17 | // exist, but otherwise to just load from the current version in storage. | |
18 | // | |
19 | // GetModeUpdate says that modules should be checked for updates and | |
20 | // downloaded prior to loading. If there are no updates, we load the version | |
21 | // from disk, otherwise we download first and then load. | |
22 | type GetMode byte | |
23 | ||
24 | const ( | |
25 | GetModeNone GetMode = iota | |
26 | GetModeGet | |
27 | GetModeUpdate | |
28 | ) | |
29 | ||
30 | // GetCopy is the same as Get except that it downloads a copy of the | |
31 | // module represented by source. | |
32 | // | |
33 | // This copy will omit and dot-prefixed files (such as .git/, .hg/) and | |
34 | // can't be updated on its own. | |
35 | func GetCopy(dst, src string) error { | |
36 | // Create the temporary directory to do the real Get to | |
37 | tmpDir, err := ioutil.TempDir("", "tf") | |
38 | if err != nil { | |
39 | return err | |
40 | } | |
bae9f6d2 JC |
41 | defer os.RemoveAll(tmpDir) |
42 | ||
15c0b25d AP |
43 | tmpDir = filepath.Join(tmpDir, "module") |
44 | ||
bae9f6d2 JC |
45 | // Get to that temporary dir |
46 | if err := getter.Get(tmpDir, src); err != nil { | |
47 | return err | |
48 | } | |
49 | ||
50 | // Make sure the destination exists | |
51 | if err := os.MkdirAll(dst, 0755); err != nil { | |
52 | return err | |
53 | } | |
54 | ||
55 | // Copy to the final location | |
56 | return copyDir(dst, tmpDir) | |
57 | } |