1""" 

2@file 

3@brief Helper to download jars from MAVEN (for Pig, Hadoop) 

4""" 

5import os 

6import urllib 

7import urllib.request 

8 

9 

10def download_jar_from_maven(group, lib, version, location, overwrite=False): 

11 """ 

12 download a jar file from maven 

13 

14 @param group group 

15 @param lib lib name 

16 @param version version 

17 @param location location 

18 @return filename 

19 """ 

20 group = group.replace(".", "/") 

21 url = "http://central.maven.org/maven2/{2}/{0}/{1}/{0}-{1}.jar".format( 

22 lib, 

23 version, 

24 group) 

25 final = os.path.join(location, "{0}-{1}.jar".format(lib, version)) 

26 

27 if not os.path.exists(location): 

28 raise FileNotFoundError(location) 

29 

30 if os.path.exists(final) and not overwrite: 

31 return final 

32 else: 

33 try: 

34 u = urllib.request.urlopen(url) 

35 alls = u.read() 

36 u.close() 

37 except Exception as e: 

38 raise FileNotFoundError(url) from e 

39 

40 with open(final, "wb") as f: 

41 f.write(alls) 

42 

43 return final