1 files changed, 109 insertions, 0 deletions
diff --git a/nikola/plugins/command_check.py b/nikola/plugins/command_check.py
new file mode 100644
index 0000000..ce1e2e3
--- /dev/null
+++ b/nikola/plugins/command_check.py
@@ -0,0 +1,109 @@
+from optparse import OptionParser
+import os
+import sys
+import urllib
+from urlparse import urlparse
+
+import lxml.html
+
+from nikola.plugin_categories import Command
+
+
+class CommandCheck(Command):
+    """Check the generated site."""
+
+    name = "check"
+
+    def run(self, *args):
+        """Check the generated site."""
+        parser = OptionParser(usage="nikola %s [options]" % self.name)
+        parser.add_option('-l', '--check-links', dest='links',
+            action='store_true',
+            help='Check for dangling links.')
+        parser.add_option('-f', '--check-files', dest='files',
+            action='store_true',
+            help='Check for unknown files.')
+
+        (options, args) = parser.parse_args(list(args))
+        if options.links:
+            scan_links()
+        if options.files:
+            scan_files()
+
+existing_targets = set([])
+
+
+def analize(task):
+    try:
+        filename = task.split(":")[-1]
+        d = lxml.html.fromstring(open(filename).read())
+        for l in d.iterlinks():
+            target = l[0].attrib[l[1]]
+            if target == "#":
+                continue
+            parsed = urlparse(target)
+            if parsed.scheme:
+                continue
+            if parsed.fragment:
+                target = target.split('#')[0]
+            target_filename = os.path.abspath(
+                os.path.join(os.path.dirname(filename),
+                    urllib.unquote(target)))
+            if target_filename not in existing_targets:
+                if os.path.exists(target_filename):
+                    existing_targets.add(target_filename)
+                else:
+                    print "In %s broken link: " % filename, target
+                    if '--find-sources' in sys.argv:
+                        print "Possible sources:"
+                        print os.popen(
+                            'nikola build list --deps %s' % task, 'r').read()
+                        print "===============================\n"
+
+    except Exception as exc:
+        print "Error with:", filename, exc
+
+
+def scan_links():
+    print "Checking Links:\n===============\n"
+    for task in os.popen('nikola build list --all', 'r').readlines():
+        task = task.strip()
+        if task.split(':')[0] in (
+            'render_tags',
+            'render_archive',
+            'render_galleries',
+            'render_indexes',
+            'render_pages',
+            'render_site') and '.html' in task:
+            analize(task)
+
+
+def scan_files():
+    print "Checking Files:\n===============\n"
+    task_fnames = set([])
+    real_fnames = set([])
+    # First check that all targets are generated in the right places
+    for task in os.popen('nikola build list --all', 'r').readlines():
+        task = task.strip()
+        if 'output' in task and ':' in task:
+            fname = task.split(':')[-1]
+            task_fnames.add(fname)
+     # And now check that there are no non-target files
+    for root, dirs, files in os.walk('output'):
+        for src_name in files:
+            fname = os.path.join(root, src_name)
+            real_fnames.add(fname)
+
+    only_on_output = list(real_fnames - task_fnames)
+    if only_on_output:
+        only_on_output.sort()
+        print "\nFiles from unknown origins:\n"
+        for f in only_on_output:
+            print f
+
+    only_on_input = list(task_fnames - real_fnames)
+    if only_on_input:
+        only_on_input.sort()
+        print "\nFiles not generated:\n"
+        for f in only_on_input:
+            print f