report-error.bbclass: new class to save build information when errors occur

Class is used to save data about errors after every task that failed.
Errors saved as json files in ERROR_REPORT_DIR (defaults to tmp/log/error-report).
To use this class one has to add INHERIT += "report-error" to local.conf.

scripts/send-error-report is a simple script that sends the json file
to a HTTP server that collects data (git://git.yoctoproject.org/error-report-web
is a Django web interface that can be used to receive and visualize
the error reports). The script will give you an URL where you can
find your report.

(From OE-Core rev: f186b4c7c6c975638e60b30a512d669dc6dc390f)

Signed-off-by: Andreea Proca <andreea.b.proca@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/report-error.bbclass

@@ -0,0 +1,66 @@
+#
+# Collects debug information in order to create error report files.
+#
+# Copyright (C) 2013 Intel Corporation
+# Author: Andreea Brandusa Proca <andreea.b.proca@intel.com>
+#
+# Licensed under the MIT license, see COPYING.MIT for details
+
+ERR_REPORT_DIR ?= "${LOG_DIR}/error-report"
+
+def errorreport_getdata(e):
+    logpath = e.data.getVar('ERR_REPORT_DIR', True)
+    datafile = os.path.join(logpath, "error-report.txt")
+    with open(datafile) as f:
+        data = f.read()
+    return data
+
+def errorreport_savedata(e, newdata, file):
+    import json
+    logpath = e.data.getVar('ERR_REPORT_DIR', True)
+    bb.utils.mkdirhier(logpath)
+    datafile = os.path.join(logpath, file)
+    with open(datafile, "w") as f:
+        json.dump(newdata, f, indent=4, sort_keys=True)
+    return datafile
+
+python errorreport_handler () {
+        import json
+
+        if isinstance(e, bb.event.BuildStarted):
+            data = {}
+            machine = e.data.getVar("MACHINE")
+            data['machine'] = machine
+            data['build_sys'] = e.data.getVar("BUILD_SYS", True)
+            data['nativelsb'] = e.data.getVar("NATIVELSBSTRING")
+            data['distro'] = e.data.getVar("DISTRO")
+            data['target_sys'] = e.data.getVar("TARGET_SYS", True)
+            data['failures'] = []
+            data['component'] = e.getPkgs()[0]
+            data['branch_commit'] = base_detect_branch(e.data) + ": " + base_detect_revision(e.data)
+            errorreport_savedata(e, data, "error-report.txt")
+
+        elif isinstance(e, bb.build.TaskFailed):
+            task = e.task
+            taskdata={}
+            log = e.data.getVar('BB_LOGFILE', True)
+            logFile = open(log, 'r')
+            taskdata['package'] = e.data.expand("${PF}")
+            taskdata['task'] = task
+            taskdata['log'] = logFile.read()
+            logFile.close()
+            jsondata = json.loads(errorreport_getdata(e))
+            jsondata['failures'].append(taskdata)
+            errorreport_savedata(e, jsondata, "error-report.txt")
+
+        elif isinstance(e, bb.event.BuildCompleted):
+            jsondata = json.loads(errorreport_getdata(e))
+            failures = jsondata['failures']
+            if(len(failures) > 0):
+                filename = "error_report_" + e.data.getVar("BUILDNAME")+".txt"
+                datafile = errorreport_savedata(e, jsondata, filename)
+                bb.note("The errors of this build are stored in: %s. You can send the errors to an upstream server by running: send-error-report %s [server]" % (datafile, datafile))
+}
+
+addhandler errorreport_handler
+errorreport_handler[eventmask] = "bb.event.BuildStarted bb.event.BuildCompleted bb.build.TaskFailed"