euscanwww: Added PoC of stabilization candidates feature

Signed-off-by: volpino <fox91@anche.no>

euscanwww/djeuscan/processing/misc/__init__.py

@@ -1,5 +1,6 @@
-__all__ = ["regen_rrds", "update_counters", "update_portage_trees"]
+__all__ = ["regen_rrds", "update_counters", "update_portage_trees", "stabilization_candidates"]
 
 from regen_rrds import regen_rrds
 from update_counters import update_counters
 from update_portage_trees import update_portage_trees
+from stabilization_candidates import stabilization_candidates

euscanwww/djeuscan/processing/misc/stabilization_candidates.py

@@ -0,0 +1,57 @@
+import os.path
+import re
+from datetime import datetime, timedelta
+from gentoolkit.package import Package
+from dateutil.parser import  parse
+
+from djeuscan.processing import FakeLogger
+from djeuscan.models import Version
+
+
+def get_version_date(version, date_limit):
+    """
+    Returns the datetime when the version was added to Portage, if less than date_limit
+    """
+    changelog_path = os.path.join(os.path.dirname(version.ebuild_path), "ChangeLog")
+    if not os.path.exists(changelog_path):
+        return
+
+    with open(changelog_path) as changelog:
+        for line in changelog:
+            match = re.match(r"^\*([^\(]+) \((\d\d \w\w\w \d\d\d\d)\)\s*$", line)
+            if match:
+                version_date = parse(match.group(2)).date()
+                if version_date < date_limit:
+                    return version_date
+
+
+def stabilization_candidates(date_limit=None, logger=None):
+    """
+    Collect stabilization candidates
+    """
+
+    if logger is None:
+        logger = FakeLogger()
+
+    if date_limit is None:
+        date_limit = (datetime.utcnow() - timedelta(days=30)).date()
+
+    logger.info("Starting collecting stabilization candidates - date_limit=%s", str(date_limit))
+
+    # Set all versions to not be stabilization_candidates
+    #Version.objects.update(stabilization_candidate=False)
+
+    # For every version check if it's unstable.
+    # If it is then check if can be a stabilization candidate
+    for version in Version.objects.filter(overlay='gentoo').exclude(version='9999').exclude(version='99999999'):
+        pkg = Package(version.cpv())
+        keywords = pkg.environment("KEYWORDS").split()
+        if all([x.startswith("~") for x in keywords]):
+            version_date = get_version_date(version, date_limit)
+            if version_date:
+                logger.info('+ [s] %s @ %s', version, version_date)
+                # XXX: What should we save? A flag and version_date? Just the date?
+                #version.stabilization_candidate = True
+                #version.save()
+
+    logger.info("Finished collecting stabilization candidates")