1 package pngstructure
2
3 import (
4 "os"
5 "path"
6
7 "github.com/dsoprea/go-logging"
8 )
9
10 var (
11 assetsPath = ""
12 )
13
14 func getModuleRootPath() string {
15 moduleRootPath := os.Getenv("PNG_MODULE_ROOT_PATH")
16 if moduleRootPath != "" {
17 return moduleRootPath
18 }
19
20 currentWd, err := os.Getwd()
21 log.PanicIf(err)
22
23 currentPath := currentWd
24 visited := make([]string, 0)
25
26 for {
27 tryStampFilepath := path.Join(currentPath, ".MODULE_ROOT")
28
29 _, err := os.Stat(tryStampFilepath)
30 if err != nil && os.IsNotExist(err) != true {
31 log.Panic(err)
32 } else if err == nil {
33 break
34 }
35
36 visited = append(visited, tryStampFilepath)
37
38 currentPath = path.Dir(currentPath)
39 if currentPath == "/" {
40 log.Panicf("could not find module-root: %v", visited)
41 }
42 }
43
44 return currentPath
45 }
46
47 func getTestAssetsPath() string {
48 if assetsPath == "" {
49 moduleRootPath := getModuleRootPath()
50 assetsPath = path.Join(moduleRootPath, "assets")
51 }
52
53 return assetsPath
54 }
55
56 func getTestBasicImageFilepath() string {
57 assetsPath := getTestAssetsPath()
58 return path.Join(assetsPath, "libpng.png")
59 }
60
61 func getTestExifImageFilepath() string {
62 assetsPath := getTestAssetsPath()
63 return path.Join(assetsPath, "exif.png")
64 }
65
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