Yotam Harchol | 466b321 | 2013-08-15 12:14:46 -0700 | [diff] [blame^] | 1 | #!/usr/bin/python |
| 2 | |
| 3 | import sys |
| 4 | import re |
| 5 | |
| 6 | class ImportLine: |
| 7 | def __init__(self, line): |
| 8 | self.line = line |
| 9 | class_name = None |
| 10 | if line[len(line) - 1] == '*': |
| 11 | class_name = '*' |
| 12 | else: |
| 13 | i = 7 |
| 14 | while i < len(line) - 1: |
| 15 | if re.match('\.[A-Z][\..]*$', line[i - 1 : len(line) - 1]): |
| 16 | class_name = line[i : len(line) - 1] |
| 17 | break |
| 18 | i = i + 1 |
| 19 | if class_name is None: |
| 20 | class_name = line[line.rfind('.') + 1 : len(line) - 1] |
| 21 | self.class_name = class_name |
| 22 | |
| 23 | |
| 24 | class ImportCleaner: |
| 25 | def __init__(self, path): |
| 26 | f = open(path) |
| 27 | self.imp_lines = [] |
| 28 | self.code_lines = [] |
| 29 | self.imports_first_line = -1 |
| 30 | i = 0 |
| 31 | for line in f: |
| 32 | if len(line) > 6 and re.match('^[ \t]*import ', line): |
| 33 | self.imp_lines.append(ImportLine(line.rstrip())) |
| 34 | if self.imports_first_line == -1: |
| 35 | self.imports_first_line = i |
| 36 | else: |
| 37 | self.code_lines.append(line.rstrip()) |
| 38 | i = i + 1 |
| 39 | f.close() |
| 40 | |
| 41 | def find_used_imports(self): |
| 42 | self.used_imports = [] |
| 43 | for line in self.code_lines: |
| 44 | temp = [] |
| 45 | for imp in self.imp_lines: |
| 46 | if imp.class_name == '*' or line.find(imp.class_name) > -1: |
| 47 | temp.append(imp) |
| 48 | for x in temp: |
| 49 | self.imp_lines.remove(x) |
| 50 | self.used_imports.append(x) |
| 51 | |
| 52 | def rewrite_file(self, path): |
| 53 | f = open(path, 'w') |
| 54 | imports_written = False |
| 55 | for i in range(len(self.code_lines)): |
| 56 | if not imports_written and self.imports_first_line == i: |
| 57 | # Put all imports |
| 58 | for imp in self.used_imports: |
| 59 | f.write(imp.line + '\n') |
| 60 | imports_written = True |
| 61 | # Put next code line |
| 62 | f.write(self.code_lines[i] + '\n') |
| 63 | f.close() |
| 64 | |
| 65 | def main(argv): |
| 66 | if len(argv) != 2: |
| 67 | print 'Usage: ImportCleaner <java file>' |
| 68 | return |
| 69 | |
| 70 | filename = argv[1] |
| 71 | print 'Cleaning imports from file %s' % (filename) |
| 72 | cleaner = ImportCleaner(filename) |
| 73 | cleaner.find_used_imports() |
| 74 | cleaner.rewrite_file(filename) |
| 75 | |
| 76 | if __name__ == '__main__': |
| 77 | main(sys.argv) |