Return a list of operator, version tuples if any are specified, else None.
(ver_remaining)
| 63 | else: |
| 64 | |
| 65 | def get_versions(ver_remaining): |
| 66 | """ |
| 67 | Return a list of operator, version tuples if any are |
| 68 | specified, else None. |
| 69 | """ |
| 70 | m = COMPARE_OP.match(ver_remaining) |
| 71 | versions = None |
| 72 | if m: |
| 73 | versions = [] |
| 74 | while True: |
| 75 | op = m.groups()[0] |
| 76 | ver_remaining = ver_remaining[m.end():] |
| 77 | m = VERSION_IDENTIFIER.match(ver_remaining) |
| 78 | if not m: |
| 79 | raise SyntaxError('invalid version: %s' % ver_remaining) |
| 80 | v = m.groups()[0] |
| 81 | versions.append((op, v)) |
| 82 | ver_remaining = ver_remaining[m.end():] |
| 83 | if not ver_remaining or ver_remaining[0] != ',': |
| 84 | break |
| 85 | ver_remaining = ver_remaining[1:].lstrip() |
| 86 | m = COMPARE_OP.match(ver_remaining) |
| 87 | if not m: |
| 88 | raise SyntaxError('invalid constraint: %s' % ver_remaining) |
| 89 | if not versions: |
| 90 | versions = None |
| 91 | return versions, ver_remaining |
| 92 | |
| 93 | if remaining[0] != '(': |
| 94 | versions, remaining = get_versions(remaining) |