[bitbake-devel] [PATCH 1/3] server/process: Show last 60 lines of the log if the server didn't start

[Richard Purdie]

We're seeing issues where the server doesn't start with no logs as to why. Allow
the server to print the last 60 log lines just in case this shows us something useful
about what is failing.

Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>
---
 lib/bb/server/process.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/bb/server/process.py b/lib/bb/server/process.py
index 4e0d9c2dbc..38a62fa34e 100644
--- a/lib/bb/server/process.py
+++ b/lib/bb/server/process.py
@@ -412,22 +412,28 @@ class BitBakeServer(object):
                 logstart_re = re.compile(self.start_log_format % ('([0-9]+)', '([0-9-]+ [0-9:.]+)'))
                 started = False
                 lines = []
+                lastlines = []
                 with open(logfile, "r") as f:
                     for line in f:
                         if started:
                             lines.append(line)
                         else:
+                            lastlines.append(line)
                             res = logstart_re.match(line.rstrip())
                             if res:
                                 ldatetime = datetime.datetime.strptime(res.group(2), self.start_log_datetime_format)
                                 if ldatetime >= startdatetime:
                                     started = True
                                     lines.append(line)
+                        if len(lastlines) > 60:
+                            lastlines = lastlines[-60:]
                 if lines:
                     if len(lines) > 10:
                         bb.error("Last 10 lines of server log for this session (%s):\n%s" % (logfile, "".join(lines[-10:])))
                     else:
                         bb.error("Server log for this session (%s):\n%s" % (logfile, "".join(lines)))
+                elif lastlines:
+                        bb.error("Server didn't start, last 60 loglines (%s):\n%s" % (logfile, "".join(lastlines)))
             else:
                 bb.error("%s doesn't exist" % logfile)
 
-- 
2.17.1