diff options
Diffstat (limited to 'portato')
| -rw-r--r-- | portato/plugin.py | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/portato/plugin.py b/portato/plugin.py index 5926922..ae89a1c 100644 --- a/portato/plugin.py +++ b/portato/plugin.py @@ -18,12 +18,16 @@ import os, os.path from xml.dom.minidom import parse from lxml import etree +from .backend import system from .constants import PLUGIN_DIR, XSD_LOCATION from .helper import debug, info, warning, error, flatten class PluginImportException (ImportError): pass +class UnmatchedDepsException (Exception): + pass + class Options (object): """The <options>-element.""" @@ -72,7 +76,10 @@ class Menu: try: mod = __import__(imp, globals(), locals(), [call]) except ImportError: - raise PluginImportException, imp + if self.plugin.unmatched_deps: + raise UnmatchedDepsException + else: + raise PluginImportException, imp try: self.call = eval("mod."+call) # build function @@ -172,6 +179,8 @@ class Plugin: self._import = None self.hooks = [] self.menus = [] + self.deps = [] + self.unmatched_deps = [] self.options = Options() self.status = self.STAT_ENABLED @@ -205,6 +214,15 @@ class Plugin: self.options.parse(o.getElementsByTagName("option")) self.status = self.STAT_DISABLED if self.options.get("disabled") else self.STAT_ENABLED + + def parse_deps (self, deps): + if deps: + for d in deps.firstChild.getElementsByTagName("dependency"): + self.deps.append(d.firstChild.nodeValue.strip()) + + for d in self.deps: + if not system.find_packages(d, "installed", with_version = False): + self.unmatched_deps.append(d) def set_import (self, imports): """This gets a list of imports and parses them - setting the import needed to call the plugin. @@ -221,7 +239,10 @@ class Plugin: mod = __import__(self._import) del mod except ImportError: - raise PluginImportException, self._import + if self.unmatched_deps: + raise UnmatchedDepsException + else: + raise PluginImportException, self._import def needs_import (self): """Returns True if an import is required prior to calling the plugin. @@ -389,6 +410,7 @@ class PluginQueue: if frontendOK is None or frontendOK == True: plugin = Plugin(p, elem.getElementsByTagName("name")[0], elem.getElementsByTagName("author")[0]) + plugin.parse_deps(elem.getElementsByTagName("dependencies")) plugin.parse_hooks(elem.getElementsByTagName("hooks")) plugin.set_import(elem.getElementsByTagName("import")) plugin.parse_menus(elem.getElementsByTagName("menu")) |