From 39e63f1358aa6baa72a5feba1909a5086d061c02 Mon Sep 17 00:00:00 2001
From: Sergei Trofimov <sergei.trofimov@arm.com>
Date: Thu, 23 Nov 2017 17:39:54 +0000
Subject: [PATCH] utils/android: add a parser for Logcat
Add a simple streaming parser for Logcat logs. At the moment, only the
recent logcat format is supported.
---
wa/utils/android.py | 66 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 66 insertions(+)
create mode 100644 wa/utils/android.py
diff --git a/wa/utils/android.py b/wa/utils/android.py
new file mode 100644
index 00000000..454772c3
--- /dev/null
+++ b/wa/utils/android.py
@@ -0,0 +1,66 @@
+import logging
+from datetime import datetime
+
+from wa.utils.types import enum
+
+
+LogcatLogLevel = enum(['verbose', 'debug', 'info', 'warn', 'error', 'assert'], start=2)
+
+log_level_map = ''.join(n[0].upper() for n in LogcatLogLevel.names)
+
+logger = logging.getLogger('logcat')
+
+
+class LogcatEvent(object):
+
+ __slots__ = ['timestamp', 'pid', 'tid', 'level', 'tag', 'message']
+
+ def __init__(self, timestamp, pid, tid, level, tag, message):
+ self.timestamp = timestamp
+ self.pid = pid
+ self.tid = pid
+ self.level = level
+ self.tag = tag
+ self.message = message
+
+ def __repr__(self):
+ return '{} {} {} {} {}: {}'.format(
+ self.timestamp, self.pid, self.tid,
+ self.level.name.upper(), self.tag,
+ self.message,
+ )
+
+ __str__ = __repr__
+
+
+class LogcatParser(object):
+
+ def parse(self, filepath):
+ with open(filepath) as fh:
+ for line in fh:
+ event = self.parse_line(line)
+ if event:
+ yield event
+
+ def parse_line(self, line):
+ line = line.strip()
+ if not line or line.startswith('-') or ':' not in line:
+ return None
+
+ metadata, message = line.split(': ', 1)
+
+ parts = metadata.split(None, 5)
+ try:
+ ts = ' '.join([parts.pop(0), parts.pop(0)])
+ timestamp = datetime.strptime(ts, '%m-%d %H:%M:%S.%f').replace(year=datetime.now().year)
+ pid = int(parts.pop(0))
+ tid = int(parts.pop(0))
+ level = LogcatLogLevel.levels[log_level_map.index(parts.pop(0))]
+ tag = (parts.pop(0) if parts else '').strip()
+ except Exception as e:
+ message = 'Invalid metadata for line:\n\t{}\n\tgot: "{}"'
+ logger.warning(message.format(line, e))
+ return None
+
+ return LogcatEvent(timestamp, pid, tid, level, tag, message)
+