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package exifcommon
import (
"os"
"path"
"encoding/binary"
"io/ioutil"
"github.com/dsoprea/go-logging"
)
var (
moduleRootPath = ""
testExifData []byte = nil
// EncodeDefaultByteOrder is the default byte-order for encoding operations.
EncodeDefaultByteOrder = binary.BigEndian
// Default byte order for tests.
TestDefaultByteOrder = binary.BigEndian
)
func GetModuleRootPath() string {
if moduleRootPath == "" {
moduleRootPath = os.Getenv("EXIF_MODULE_ROOT_PATH")
if moduleRootPath != "" {
return moduleRootPath
}
currentWd, err := os.Getwd()
log.PanicIf(err)
currentPath := currentWd
visited := make([]string, 0)
for {
tryStampFilepath := path.Join(currentPath, ".MODULE_ROOT")
_, err := os.Stat(tryStampFilepath)
if err != nil && os.IsNotExist(err) != true {
log.Panic(err)
} else if err == nil {
break
}
visited = append(visited, tryStampFilepath)
currentPath = path.Dir(currentPath)
if currentPath == "/" {
log.Panicf("could not find module-root: %v", visited)
}
}
moduleRootPath = currentPath
}
return moduleRootPath
}
func GetTestAssetsPath() string {
moduleRootPath := GetModuleRootPath()
assetsPath := path.Join(moduleRootPath, "assets")
return assetsPath
}
func getTestImageFilepath() string {
assetsPath := GetTestAssetsPath()
testImageFilepath := path.Join(assetsPath, "NDM_8901.jpg")
return testImageFilepath
}
func getTestExifData() []byte {
if testExifData == nil {
assetsPath := GetTestAssetsPath()
filepath := path.Join(assetsPath, "NDM_8901.jpg.exif")
var err error
testExifData, err = ioutil.ReadFile(filepath)
log.PanicIf(err)
}
return testExifData
}
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