sdk/cwl/arvados_cwl/fsaccess.py

   1 import fnmatch
   2 import os
   3 import errno
   4 import urlparse
   5 import re
   6
   7 import ruamel.yaml as yaml
   8
   9 import cwltool.stdfsaccess
  10 from cwltool.pathmapper import abspath
  11 import cwltool.resolver
  12
  13 import arvados.util
  14 import arvados.collection
  15 import arvados.arvfile
  16
  17 from schema_salad.ref_resolver import DefaultFetcher
  18
  19 class CollectionFsAccess(cwltool.stdfsaccess.StdFsAccess):
  20     """Implement the cwltool FsAccess interface for Arvados Collections."""
  21
  22     def __init__(self, basedir, api_client=None, keep_client=None):
  23         super(CollectionFsAccess, self).__init__(basedir)
  24         self.api_client = api_client
  25         self.keep_client = keep_client
  26         self.collections = {}
  27
  28     def get_collection(self, path):
  29         p = path.split("/")
  30         if p[0].startswith("keep:") and arvados.util.keep_locator_pattern.match(p[0][5:]):
  31             pdh = p[0][5:]
  32             if pdh not in self.collections:
  33                 self.collections[pdh] = arvados.collection.CollectionReader(pdh, api_client=self.api_client,
  34                                                                             keep_client=self.keep_client)
  35             return (self.collections[pdh], "/".join(p[1:]))
  36         else:
  37             return (None, path)
  38
  39     def _match(self, collection, patternsegments, parent):
  40         if not patternsegments:
  41             return []
  42
  43         if not isinstance(collection, arvados.collection.RichCollectionBase):
  44             return []
  45
  46         ret = []
  47         # iterate over the files and subcollections in 'collection'
  48         for filename in collection:
  49             if patternsegments[0] == '.':
  50                 # Pattern contains something like "./foo" so just shift
  51                 # past the "./"
  52                 ret.extend(self._match(collection, patternsegments[1:], parent))
  53             elif fnmatch.fnmatch(filename, patternsegments[0]):
  54                 cur = os.path.join(parent, filename)
  55                 if len(patternsegments) == 1:
  56                     ret.append(cur)
  57                 else:
  58                     ret.extend(self._match(collection[filename], patternsegments[1:], cur))
  59         return ret
  60
  61     def glob(self, pattern):
  62         collection, rest = self.get_collection(pattern)
  63         if collection and not rest:
  64             return [pattern]
  65         patternsegments = rest.split("/")
  66         return self._match(collection, patternsegments, "keep:" + collection.manifest_locator())
  67
  68     def open(self, fn, mode):
  69         collection, rest = self.get_collection(fn)
  70         if collection:
  71             return collection.open(rest, mode)
  72         else:
  73             return super(CollectionFsAccess, self).open(self._abs(fn), mode)
  74
  75     def exists(self, fn):
  76         collection, rest = self.get_collection(fn)
  77         if collection:
  78             return collection.exists(rest)
  79         else:
  80             return super(CollectionFsAccess, self).exists(fn)
  81
  82     def isfile(self, fn):  # type: (unicode) -> bool
  83         collection, rest = self.get_collection(fn)
  84         if collection:
  85             if rest:
  86                 return isinstance(collection.find(rest), arvados.arvfile.ArvadosFile)
  87             else:
  88                 return False
  89         else:
  90             return super(CollectionFsAccess, self).isfile(fn)
  91
  92     def isdir(self, fn):  # type: (unicode) -> bool
  93         collection, rest = self.get_collection(fn)
  94         if collection:
  95             if rest:
  96                 return isinstance(collection.find(rest), arvados.collection.RichCollectionBase)
  97             else:
  98                 return True
  99         else:
 100             return super(CollectionFsAccess, self).isdir(fn)
 101
 102     def listdir(self, fn):  # type: (unicode) -> List[unicode]
 103         collection, rest = self.get_collection(fn)
 104         if collection:
 105             if rest:
 106                 dir = collection.find(rest)
 107             else:
 108                 dir = collection
 109             if dir is None:
 110                 raise IOError(errno.ENOENT, "Directory '%s' in '%s' not found" % (rest, collection.portable_data_hash()))
 111             if not isinstance(dir, arvados.collection.RichCollectionBase):
 112                 raise IOError(errno.ENOENT, "Path '%s' in '%s' is not a Directory" % (rest, collection.portable_data_hash()))
 113             return [abspath(l, fn) for l in dir.keys()]
 114         else:
 115             return super(CollectionFsAccess, self).listdir(fn)
 116
 117     def join(self, path, *paths): # type: (unicode, *unicode) -> unicode
 118         if paths and paths[-1].startswith("keep:") and arvados.util.keep_locator_pattern.match(paths[-1][5:]):
 119             return paths[-1]
 120         return os.path.join(path, *paths)
 121
 122     def realpath(self, path):
 123         if path.startswith("$(task.tmpdir)") or path.startswith("$(task.outdir)"):
 124             return path
 125         collection, rest = self.get_collection(path)
 126         if collection:
 127             return path
 128         else:
 129             return os.path.realpath(path)
 130
 131 class CollectionFetcher(DefaultFetcher):
 132     def __init__(self, cache, session, api_client=None, keep_client=None):
 133         super(CollectionFetcher, self).__init__(cache, session)
 134         self.api_client = api_client
 135         self.fsaccess = CollectionFsAccess("", api_client=api_client, keep_client=keep_client)
 136
 137     def fetch_text(self, url):
 138         if url.startswith("keep:"):
 139             with self.fsaccess.open(url, "r") as f:
 140                 return f.read()
 141         if url.startswith("arvwf:"):
 142             return self.api_client.workflows().get(uuid=url[6:]).execute()["definition"]
 143         return super(CollectionFetcher, self).fetch_text(url)
 144
 145     def check_exists(self, url):
 146         if url.startswith("keep:"):
 147             return self.fsaccess.exists(url)
 148         if url.startswith("arvwf:"):
 149             if self.fetch_text(url):
 150                 return True
 151         return super(CollectionFetcher, self).check_exists(url)
 152
 153     def urljoin(self, base_url, url):
 154         if not url:
 155             return base_url
 156
 157         urlsp = urlparse.urlsplit(url)
 158         if urlsp.scheme or not base_url:
 159             return url
 160
 161         basesp = urlparse.urlsplit(base_url)
 162         if basesp.scheme in ("keep", "arvwf"):
 163             if not basesp.path:
 164                 raise IOError(errno.EINVAL, "Invalid Keep locator", base_url)
 165
 166             baseparts = basesp.path.split("/")
 167             urlparts = urlsp.path.split("/") if urlsp.path else []
 168
 169             pdh = baseparts.pop(0)
 170
 171             if basesp.scheme == "keep" and not arvados.util.keep_locator_pattern.match(pdh):
 172                 raise IOError(errno.EINVAL, "Invalid Keep locator", base_url)
 173
 174             if urlsp.path.startswith("/"):
 175                 baseparts = []
 176                 urlparts.pop(0)
 177
 178             if baseparts and urlsp.path:
 179                 baseparts.pop()
 180
 181             path = "/".join([pdh] + baseparts + urlparts)
 182             return urlparse.urlunsplit((basesp.scheme, "", path, "", urlsp.fragment))
 183
 184         return super(CollectionFetcher, self).urljoin(base_url, url)
 185
 186 workflow_uuid_pattern = re.compile(r'[a-z0-9]{5}-7fd4e-[a-z0-9]{15}')
 187
 188 def collectionResolver(api_client, document_loader, uri):
 189     if workflow_uuid_pattern.match(uri):
 190         return "arvwf:%s#main" % (uri)
 191
 192     p = uri.split("/")
 193     if arvados.util.keep_locator_pattern.match(p[0]):
 194         return "keep:%s" % (uri)
 195
 196     if arvados.util.collection_uuid_pattern.match(p[0]):
 197         return "keep:%s%s" % (self.api_client.collections().
 198                               get(uuid=uri).execute()["portable_data_hash"],
 199                               uri[len(p[0]):])
 200
 201     return cwltool.resolver.tool_resolver(document_loader, uri)