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common: improve documentation comments (#16701)

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This commit adds many comments and removes unused code.
It also removes the EmptyHash function, which had some uses
but was silly.
This commit is contained in:
kiel barry
2018-05-29 03:42:21 -07:00
committed by Felix Lange
parent 998f6564b2
commit 84f8c0cc1f
9 changed files with 84 additions and 138 deletions
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6
common/path.go
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@ -30,6 +30,7 @@ func MakeName(name, version string) string {
return fmt.Sprintf("%s/v%s/%s/%s", name, version, runtime.GOOS, runtime.Version())
}
// FileExist checks if a file exists at filePath.
func FileExist(filePath string) bool {
_, err := os.Stat(filePath)
if err != nil && os.IsNotExist(err) {
@ -39,9 +40,10 @@ func FileExist(filePath string) bool {
return true
}
func AbsolutePath(Datadir string, filename string) string {
// AbsolutePath returns datadir + filename, or filename if it is absolute.
func AbsolutePath(datadir string, filename string) string {
if filepath.IsAbs(filename) {
return filename
}
return filepath.Join(Datadir, filename)
return filepath.Join(datadir, filename)
}