src/allmydata/scripts/common.py

   1
   2 import os, sys, urllib
   3 from twisted.python import usage
   4
   5
   6 class BaseOptions:
   7     optFlags = [
   8         ["quiet", "q", "Operate silently."],
   9         ["version", "V", "Display version numbers and exit."],
  10         ]
  11
  12     def opt_version(self):
  13         import allmydata
  14         print allmydata.get_package_versions_string()
  15         sys.exit(0)
  16
  17
  18 class BasedirMixin:
  19     optFlags = [
  20         ["multiple", "m", "allow multiple basedirs to be specified at once"],
  21         ]
  22
  23     def postOptions(self):
  24         if not self.basedirs:
  25             raise usage.UsageError("<basedir> parameter is required")
  26         if self['basedir']:
  27             del self['basedir']
  28         self['basedirs'] = [os.path.abspath(os.path.expanduser(b))
  29                             for b in self.basedirs]
  30
  31     def parseArgs(self, *args):
  32         self.basedirs = []
  33         if self['basedir']:
  34             self.basedirs.append(self['basedir'])
  35         if self['multiple']:
  36             self.basedirs.extend(args)
  37         else:
  38             if len(args) == 0 and not self.basedirs:
  39                 if sys.platform == 'win32':
  40                     from allmydata.windows import registry
  41                     self.basedirs.append(registry.get_base_dir_path())
  42                 else:
  43                     self.basedirs.append(os.path.expanduser("~/.tahoe"))
  44             if len(args) > 0:
  45                 self.basedirs.append(args[0])
  46             if len(args) > 1:
  47                 raise usage.UsageError("I wasn't expecting so many arguments")
  48
  49 class NoDefaultBasedirMixin(BasedirMixin):
  50     def parseArgs(self, *args):
  51         # create-client won't default to --basedir=~/.tahoe
  52         self.basedirs = []
  53         if self['basedir']:
  54             self.basedirs.append(self['basedir'])
  55         if self['multiple']:
  56             self.basedirs.extend(args)
  57         else:
  58             if len(args) > 0:
  59                 self.basedirs.append(args[0])
  60             if len(args) > 1:
  61                 raise usage.UsageError("I wasn't expecting so many arguments")
  62         if not self.basedirs:
  63             raise usage.UsageError("--basedir must be provided")
  64
  65 DEFAULT_ALIAS = "tahoe"
  66
  67
  68 def get_aliases(nodedir):
  69     from allmydata import uri
  70     aliases = {}
  71     aliasfile = os.path.join(nodedir, "private", "aliases")
  72     rootfile = os.path.join(nodedir, "private", "root_dir.cap")
  73     try:
  74         f = open(rootfile, "r")
  75         rootcap = f.read().strip()
  76         if rootcap:
  77             aliases["tahoe"] = uri.from_string_dirnode(rootcap).to_string()
  78     except EnvironmentError:
  79         pass
  80     try:
  81         f = open(aliasfile, "r")
  82         for line in f.readlines():
  83             line = line.strip()
  84             if line.startswith("#"):
  85                 continue
  86             name, cap = line.split(":", 1)
  87             # normalize it: remove http: prefix, urldecode
  88             cap = cap.strip()
  89             aliases[name] = uri.from_string_dirnode(cap).to_string()
  90     except EnvironmentError:
  91         pass
  92     return aliases
  93
  94 def get_alias(aliases, path, default):
  95     # transform "work:path/filename" into (aliases["work"], "path/filename")
  96     # We special-case URI:
  97     if path.startswith("URI:"):
  98         # The only way to get a sub-path is to use URI:blah:./foo, and we
  99         # strip out the :./ sequence.
 100         sep = path.find(":./")
 101         if sep != -1:
 102             return path[:sep], path[sep+3:]
 103         return path, ""
 104     colon = path.find(":")
 105     if colon == -1:
 106         # no alias
 107         return aliases[default], path
 108     alias = path[:colon]
 109     if "/" in alias:
 110         # no alias, but there's a colon in a dirname/filename, like
 111         # "foo/bar:7"
 112         return aliases[default], path
 113     return aliases[alias], path[colon+1:]
 114
 115 def escape_path(path):
 116     segments = path.split("/")
 117     return "/".join([urllib.quote(s) for s in segments])