diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/spack/spack/repository.py | 140 | ||||
| -rw-r--r-- | lib/spack/spack/virtual.py | 14 |
2 files changed, 141 insertions, 13 deletions
diff --git a/lib/spack/spack/repository.py b/lib/spack/spack/repository.py index 6e7e95b8bc..63ae999ce1 100644 --- a/lib/spack/spack/repository.py +++ b/lib/spack/spack/repository.py @@ -23,6 +23,9 @@ # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA ############################################################################## import os +import stat +import shutil +import errno import exceptions import sys import inspect @@ -33,6 +36,7 @@ from bisect import bisect_left import yaml import llnl.util.tty as tty +from llnl.util.lock import Lock from llnl.util.filesystem import * import spack.error @@ -394,13 +398,25 @@ class Repo(object): if not condition: raise BadRepoError(msg) # Validate repository layout. - self.config_file = join_path(self.root, repo_config_name) + self.config_file = join_path(self.root, repo_config_name) check(os.path.isfile(self.config_file), "No %s found in '%s'" % (repo_config_name, root)) + self.packages_path = join_path(self.root, packages_dir_name) check(os.path.isdir(self.packages_path), "No directory '%s' found in '%s'" % (repo_config_name, root)) + self.index_file = join_path(self.root, repo_index_name) + check(not os.path.exists(self.index_file) or + (os.path.isfile(self.index_file) and os.access(self.index_file, os.R_OK|os.W_OK)), + "Cannot access repository index file in %s" % root) + + # lock file for reading/writing the index + self._lock_path = join_path(self.root, 'lock') + if not os.path.exists(self._lock_path): + touch(self._lock_path) + self._lock = Lock(self._lock_path) + # Read configuration and validate namespace config = self._read_config() check('namespace' in config, '%s must define a namespace.' @@ -424,7 +440,14 @@ class Repo(object): self._modules = {} self._classes = {} self._instances = {} + + # list of packages that are newer than the index. + self._needs_update = [] + + # Index of virtual dependencies self._provider_index = None + + # Cached list of package names. self._all_package_names = None # make sure the namespace for packages in this repo exists. @@ -611,13 +634,56 @@ class Repo(object): self._instances.clear() + def _update_provider_index(self): + # Check modification dates of all packages + self._fast_package_check() + + def read(): + with open(self.index_file) as f: + self._provider_index = ProviderIndex.from_yaml(f) + + # Read the old ProviderIndex, or make a new one. + index_existed = os.path.isfile(self.index_file) + if index_existed and not self._needs_update: + self._lock.acquire_read() + try: + read() + finally: + self._lock.release_read() + + else: + self._lock.acquire_write() + try: + if index_existed: + with open(self.index_file) as f: + self._provider_index = ProviderIndex.from_yaml(f) + else: + self._provider_index = ProviderIndex() + + for pkg_name in self._needs_update: + namespaced_name = '%s.%s' % (self.namespace, pkg_name) + self._provider_index.remove_provider(namespaced_name) + self._provider_index.update(namespaced_name) + + + tmp = self.index_file + '.tmp' + with open(tmp, 'w') as f: + self._provider_index.to_yaml(f) + os.rename(tmp, self.index_file) + + except: + shutil.rmtree(tmp, ignore_errors=True) + raise + + finally: + self._lock.release_write() + + @property def provider_index(self): """A provider index with names *specific* to this repo.""" if self._provider_index is None: - namespaced_names = ['%s.%s' % (self.namespace, n) - for n in self.all_package_names()] - self._provider_index = ProviderIndex(namespaced_names) + self._update_provider_index() return self._provider_index @@ -663,21 +729,33 @@ class Repo(object): return join_path(pkg_dir, package_file_name) - def all_package_names(self): - """Returns a sorted list of all package names in the Repo.""" + def _fast_package_check(self): + """List packages in the repo and cehck whether index is up to date. + + Both of these opreations require checking all `package.py` + files so we do them at the same time. We list the repo + directory and look at package.py files, and we compare the + index modification date with the ost recently modified package + file, storing the result. + + The implementation here should try to minimize filesystem + calls. At the moment, it is O(number of packages) and makes + about one stat call per package. This is resonably fast, and + avoids actually importing packages in Spack, which is slow. + + """ if self._all_package_names is None: self._all_package_names = [] + # Get index modification time. + index_mtime = 0 + if os.path.exists(self.index_file): + sinfo = os.stat(self.index_file) + index_mtime = sinfo.st_mtime + for pkg_name in os.listdir(self.packages_path): # Skip non-directories in the package root. pkg_dir = join_path(self.packages_path, pkg_name) - if not os.path.isdir(pkg_dir): - continue - - # Skip directories without a package.py in them. - pkg_file = join_path(self.packages_path, pkg_name, package_file_name) - if not os.path.isfile(pkg_file): - continue # Warn about invalid names that look like packages. if not valid_module_name(pkg_name): @@ -685,14 +763,50 @@ class Repo(object): % (pkg_dir, pkg_name)) continue + # construct the file name from the directory + pkg_file = join_path( + self.packages_path, pkg_name, package_file_name) + + # Use stat here to avoid lots of calls to the filesystem. + try: + sinfo = os.stat(pkg_file) + except OSError as e: + if e.errno == errno.ENOENT: + # No package.py file here. + continue + elif e.errno == errno.EACCES: + tty.warn("Can't read package file %s." % pkg_file) + continue + raise e + + # if it's not a file, skip it. + if stat.S_ISDIR(sinfo.st_mode): + continue + # All checks passed. Add it to the list. self._all_package_names.append(pkg_name) + + # record the package if it is newer than the index. + if sinfo.st_mtime > index_mtime: + self._needs_update.append(pkg_name) + self._all_package_names.sort() return self._all_package_names + def all_package_names(self): + """Returns a sorted list of all package names in the Repo.""" + self._fast_package_check() + return self._all_package_names + + def all_packages(self): + """Iterator over all packages in the repository. + + Use this with care, because loading packages is slow. + + """ for name in self.all_package_names(): yield self.get(name) diff --git a/lib/spack/spack/virtual.py b/lib/spack/spack/virtual.py index 2c47921a3f..785ab98918 100644 --- a/lib/spack/spack/virtual.py +++ b/lib/spack/spack/virtual.py @@ -227,6 +227,20 @@ class ProviderIndex(object): spdict[provided_spec] += opdict[provided_spec] + def remove_provider(self, pkg_name): + """Remove a provider from the ProviderIndex.""" + for pkg in self.providers: + pkg_dict = self.providers[pkg] + for provided, pset in pkg_dict.items(): + for provider in pset: + if provider.fullname == pkg_name: + pset.remove(provider) + if not pset: + del pkg_dict[provided] + if not pkg_dict: + del self.providers[pkg] + + def copy(self): """Deep copy of this ProviderIndex.""" clone = ProviderIndex() |