diff options
Diffstat (limited to 'setuptools/command/depends.py')
| -rw-r--r-- | setuptools/command/depends.py | 67 |
1 files changed, 61 insertions, 6 deletions
diff --git a/setuptools/command/depends.py b/setuptools/command/depends.py index e149fac..8917c83 100644 --- a/setuptools/command/depends.py +++ b/setuptools/command/depends.py @@ -1,7 +1,9 @@ from distutils.cmd import Command -import os +import os, sys + class depends(Command): + """Download and install dependencies, if needed""" description = "download and install dependencies, if needed" @@ -13,15 +15,68 @@ class depends(Command): "ignore options that won't be passed to child setup scripts"), ] + path_attrs = [ + # Note: these must be in *reverse* order, as they are pushed onto the + # *front* of a copy of sys.path. + ('install','install_libbase'), # installation base if extra_path + ('install_lib','install_dir'), # where modules are installed + ] + + def initialize_options(self): self.temp = None - self.install_purelib = self.install_platlib = None - self.install_lib = self.install_libbase = None - self.install_scripts = self.install_data = self.install_headers = None - self.compiler = self.debug = self.force = None def finalize_options(self): self.set_undefined_options('build',('build_temp', 'temp')) + self.set_search_path() + + def set_search_path(self): + """Determine paths to check for installed dependencies""" + path = sys.path[:] # copy sys path + for cmd,attr in self.path_attrs: + dir = getattr(self.get_finalized_command(cmd),attr,None) + if dir and dir not in path: + path.insert(0,dir) # prepend + self.search_path = path def run(self): - self.announce("downloading and building here") + self.announce("checking for installed dependencies") + needed = [ + dep for dep in self.distribution.requires if self.is_needed(dep) + ] + if not needed: + self.announce("all dependencies are present and up-to-date") + return + + # Alert the user to missing items + fmt = "\t%s\t%s\n" + items = [fmt % (dep.full_name(),dep.homepage) for dep in needed] + items.insert(0,"Please install the following packages first:\n") + items.append('') + raise SystemExit('\n'.join(items)) # dump msg to stderr and exit + + + def is_needed(self,dep): + """Does the specified dependency need to be installed/updated?""" + + self.announce("searching for "+dep.full_name()) + version = dep.get_version(self.search_path) + + if version is None: + self.announce(name+" not found!") + return True + + if str(version)=="unknown": + status = dep.name+" is installed" + else: + status = dep.name+" version "+str(version)+" found" + + if dep.version_ok(version): + self.announce(status+" (OK)") + return False + else: + self.announce(status+" (update needed)") + return True + + + |