refactor(2/init) use util.FileExists

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

# TYPES
# feat
# fix
# docs
# style (formatting, missing semi colons, etc; no code change):
# refactor
# test (adding missing tests, refactoring tests; no production code change)
# chore (updating grunt tasks etc; no production code change)
Signed-off-by: Brian Tiger Chow <brian.holderchow@gmail.com>

cmd/ipfs2/init.go

@@ -92,12 +92,8 @@ func doInit(configRoot string, dspathOverride string, force bool, nBitsForKeypai
 		return nil, errors.New("Couldn't get home directory path")
 	}
 
-	fi, err := os.Lstat(configFilename)
-	if fi != nil || (err != nil && !os.IsNotExist(err)) {
-		if !force {
-			// TODO multi-line string
-			return nil, errCannotInitConfigExists
-		}
+	if u.FileExists(configFilename) && !force {
+		return nil, errCannotInitConfigExists
 	}
 
 	conf, err := initConfig(configFilename, dspathOverride, nBitsForKeypair)