bitbake: Switch to use subprocess for forking tasks and FAKEROOTENV to run shell and python under a fakeroot environment

Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

7 files changed, 201 insertions, 112 deletions

diff --git a/bitbake/bin/bitbake-runtask b/bitbake/bin/bitbake-runtask
new file mode 100755
index 0000000000..417f3949cd
--- /dev/null
+++ b/bitbake/bin/bitbake-runtask
@@ -0,0 +1,77 @@
+#!/usr/bin/env python
+
+import os
+import sys
+import warnings
+sys.path.insert(0, os.path.join(os.path.dirname(os.path.dirname(sys.argv[0])), 'lib'))
+
+class BBConfiguration(object):
+    """
+    Manages build options and configurations for one run
+    """
+
+    def __init__(self):
+        setattr(self, "data", {})
+        setattr(self, "file", [])
+        setattr(self, "cmd", None)
+
+_warnings_showwarning = warnings.showwarning
+def _showwarning(message, category, filename, lineno, file=None, line=None):
+    """Display python warning messages using bb.msg"""
+    if file is not None:
+        if _warnings_showwarning is not None:
+            _warnings_showwarning(message, category, filename, lineno, file, line)
+    else:
+        s = warnings.formatwarning(message, category, filename, lineno)
+        s = s.split("\n")[0]
+        bb.msg.warn(None, s)
+
+warnings.showwarning = _showwarning
+warnings.simplefilter("ignore", DeprecationWarning)
+
+import bb.event
+
+# Need to map our I/O correctly. Currently stdout is a pipe to 
+# the server expecting events. We save this and map stdout to stderr.
+
+eventfd = os.dup(sys.stdout.fileno())
+bb.event.worker_pipe = os.fdopen(eventfd, 'w', 0)
+# Replace those fds with our own
+os.dup2(sys.stderr.fileno(), sys.stdout.fileno())
+
+# Save out the PID so that the event can include it the
+# events
+bb.event.worker_pid = os.getpid()
+bb.event.usestdout = False
+
+
+import bb.cooker
+
+cooker = bb.cooker.BBCooker(BBConfiguration(), None)
+buildfile = sys.argv[1]
+taskname = sys.argv[2]
+
+cooker.parseConfiguration()
+
+cooker.bb_cache = bb.cache.init(cooker)
+cooker.status = bb.cache.CacheData()
+
+(fn, cls) = cooker.bb_cache.virtualfn2realfn(buildfile)
+buildfile = cooker.matchFile(fn)
+fn = cooker.bb_cache.realfn2virtual(buildfile, cls)
+
+cooker.buildSetVars()
+
+# Load data into the cache for fn and parse the loaded cache data
+the_data = cooker.bb_cache.loadDataFull(fn, cooker.get_file_appends(fn), cooker.configuration.data)
+cooker.bb_cache.setData(fn, buildfile, the_data)
+cooker.bb_cache.handle_data(fn, cooker.status)
+
+if taskname.endswith("_setscene"):
+    the_data.setVarFlag(taskname, "quieterrors", "1")
+
+ret = 0
+if sys.argv[3] != "True":
+    ret = bb.build.exec_task(taskname, the_data)
+sys.exit(ret)
+
diff --git a/bitbake/lib/bb/build.py b/bitbake/lib/bb/build.py
index 0bf0154cb4..77af92abee 100644
--- a/bitbake/lib/bb/build.py
+++ b/bitbake/lib/bb/build.py
@@ -44,12 +44,6 @@ class FuncFailed(Exception):
     Second paramter is a logfile (optional)
     """
 
-class EventException(Exception):
-    """Exception which is associated with an Event."""
-
-    def __init__(self, msg, event):
-        self.args = msg, event
-
 class TaskBase(event.Event):
     """Base class for task events"""
 
@@ -80,7 +74,7 @@ class TaskFailed(TaskBase):
         self.msg = msg
         TaskBase.__init__(self, t, d)
 
-class InvalidTask(TaskBase):
+class TaskInvalid(TaskBase):
     """Invalid Task"""
 
 # functions
@@ -94,7 +88,7 @@ def exec_func(func, d, dirs = None):
         return
 
     flags = data.getVarFlags(func, d)
-    for item in ['deps', 'check', 'interactive', 'python', 'cleandirs', 'dirs', 'lockfiles', 'fakeroot']:
+    for item in ['deps', 'check', 'interactive', 'python', 'cleandirs', 'dirs', 'lockfiles', 'fakeroot', 'task']:
         if not item in flags:
             flags[item] = None
 
@@ -138,7 +132,7 @@ def exec_func(func, d, dirs = None):
     # Handle logfiles
     si = file('/dev/null', 'r')
     try:
-        if bb.msg.debug_level['default'] > 0 or ispython:
+        if bb.msg.debug_level['default'] > 0 and not ispython:
             so = os.popen("tee \"%s\"" % logfile, "w")
         else:
             so = file(logfile, 'w')
@@ -158,6 +152,8 @@ def exec_func(func, d, dirs = None):
     os.dup2(so.fileno(), oso[1])
     os.dup2(se.fileno(), ose[1])
 
+    bb.event.useStdout = True
+
     locks = []
     lockfiles = flags['lockfiles']
     if lockfiles:
@@ -183,6 +179,8 @@ def exec_func(func, d, dirs = None):
         for lock in locks:
             bb.utils.unlockfile(lock)
 
+        bb.event.useStdout = False
+
         # Restore the backup fds
         os.dup2(osi[0], osi[1])
         os.dup2(oso[0], oso[1])
@@ -221,6 +219,7 @@ def exec_func_python(func, d, runfile, logfile):
             raise
         raise FuncFailed("Function %s failed" % func, logfile)
 
+
 def exec_func_shell(func, d, runfile, logfile, flags):
     """Execute a shell BB 'function' Returns true if execution was successful.
 
@@ -251,12 +250,11 @@ def exec_func_shell(func, d, runfile, logfile, flags):
         raise FuncFailed("Function not specified for exec_func_shell")
 
     # execute function
-    if flags['fakeroot']:
-        maybe_fakeroot = "PATH=\"%s\" %s " % (bb.data.getVar("PATH", d, 1), bb.data.getVar("FAKEROOT", d, 1) or "fakeroot")
-    else:
-        maybe_fakeroot = ''
+    if flags['fakeroot'] and not flags['task']:
+        bb.fatal("Function %s specifies fakeroot but isn't a task?!" % func)
+
     lang_environment = "LC_ALL=C "
-    ret = os.system('%s%ssh -e %s' % (lang_environment, maybe_fakeroot, runfile))
+    ret = os.system('%ssh -e %s' % (lang_environment, runfile))
 
     if ret == 0:
         return
@@ -273,7 +271,13 @@ def exec_task(task, d):
 
     # Check whther this is a valid task
     if not data.getVarFlag(task, 'task', d):
-        raise EventException("No such task", InvalidTask(task, d))
+        event.fire(TaskInvalid(task, d), d)
+        bb.msg.error(bb.msg.domain.Build, "No such task: %s" % task)
+        return 1
+
+    quieterr = False
+    if d.getVarFlag(task, "quieterrors") is not None:
+         quieterr = True
 
     try:
         bb.msg.debug(1, bb.msg.domain.Build, "Executing task %s" % task)
@@ -292,6 +296,11 @@ def exec_task(task, d):
         for func in postfuncs:
             exec_func(func, localdata)
         event.fire(TaskSucceeded(task, localdata), localdata)
+
+        # make stamp, or cause event and raise exception
+        if not data.getVarFlag(task, 'nostamp', d) and not data.getVarFlag(task, 'selfstamp', d):
+            make_stamp(task, d)
+
     except FuncFailed as message:
         # Try to extract the optional logfile
         try:
@@ -299,14 +308,22 @@ def exec_task(task, d):
         except:
             logfile = None
             msg = message
-        bb.msg.note(1, bb.msg.domain.Build, "Task failed: %s" % message )
-        failedevent = TaskFailed(msg, logfile, task, d)
-        event.fire(failedevent, d)
-        raise EventException("Function failed in task: %s" % message, failedevent)
-
-    # make stamp, or cause event and raise exception
-    if not data.getVarFlag(task, 'nostamp', d) and not data.getVarFlag(task, 'selfstamp', d):
-        make_stamp(task, d)
+        if not quieterr:
+            bb.msg.error(bb.msg.domain.Build, "Task failed: %s" % message )
+            failedevent = TaskFailed(msg, logfile, task, d)
+            event.fire(failedevent, d)
+        return 1
+
+    except Exception:
+        from traceback import format_exc
+        if not quieterr:
+            bb.msg.error(bb.msg.domain.Build, "Build of %s failed" % (task))
+            bb.msg.error(bb.msg.domain.Build, format_exc())
+            failedevent = TaskFailed("Task Failed", None, task, d)
+            event.fire(failedevent, d)
+        return 1
+
+    return 0
 
 def extract_stamp(d, fn):
     """
@@ -380,6 +397,7 @@ def add_tasks(tasklist, d):
         getTask('rdeptask')
         getTask('recrdeptask')
         getTask('nostamp')
+        getTask('fakeroot')
         task_deps['parents'][task] = []
         for dep in flags['deps']:
             dep = data.expand(dep, d)
diff --git a/bitbake/lib/bb/cooker.py b/bitbake/lib/bb/cooker.py
index a1620b0162..3a25956625 100644
--- a/bitbake/lib/bb/cooker.py
+++ b/bitbake/lib/bb/cooker.py
@@ -70,12 +70,16 @@ class BBCooker:
         self.cache = None
         self.bb_cache = None
 
-        self.server = server.BitBakeServer(self)
+        if server:
+            self.server = server.BitBakeServer(self)
 
         self.configuration = configuration
 
         self.configuration.data = bb.data.init()
 
+        if not server:
+            bb.data.setVar("BB_WORKERCONTEXT", "1", self.configuration.data)
+
         bb.data.inheritFromOS(self.configuration.data)
 
         self.parseConfigurationFiles(self.configuration.file)
@@ -544,7 +548,6 @@ class BBCooker:
 
             bb.event.fire(bb.event.ConfigParsed(), self.configuration.data)
 
-
         except IOError as e:
             bb.msg.fatal(bb.msg.domain.Parsing, "Error when parsing %s: %s" % (files, str(e)))
         except bb.parse.ParseError as details:
diff --git a/bitbake/lib/bb/data.py b/bitbake/lib/bb/data.py
index 636983edcc..9e37f5e32d 100644
--- a/bitbake/lib/bb/data.py
+++ b/bitbake/lib/bb/data.py
@@ -229,6 +229,15 @@ def emit_env(o=sys.__stdout__, d = init(), all=False):
         for key in keys:
             emit_var(key, o, d, all and not isfunc) and o.write('\n')
 
+def export_vars(d):
+    keys = (key for key in d.keys() if d.getVarFlag(key, "export"))
+    ret = {}
+    for k in keys:
+        v = d.getVar(k, True)
+        if v: 
+            ret[k] = v
+    return ret
+
 def update_data(d):
     """Performs final steps upon the datastore, including application of overrides"""
     d.finalize()
diff --git a/bitbake/lib/bb/event.py b/bitbake/lib/bb/event.py
index 7731649eff..f5ba6eab3c 100644
--- a/bitbake/lib/bb/event.py
+++ b/bitbake/lib/bb/event.py
@@ -31,6 +31,7 @@ import pickle
 # the runqueue forks off.
 worker_pid = 0
 worker_pipe = None
+useStdout = True
 
 class Event:
     """Base class for events"""
@@ -102,15 +103,12 @@ def fire(event, d):
 
 def worker_fire(event, d):
     data = "<event>" + pickle.dumps(event) + "</event>"
-    try:
-        if os.write(worker_pipe, data) != len (data):
-            print("Error sending event to server (short write)")
-    except OSError:
-        sys.exit(1)
+    worker_pipe.write(data)
+    worker_pipe.flush()
 
 def fire_from_worker(event, d):
     if not event.startswith("<event>") or not event.endswith("</event>"):
-        print("Error, not an event")
+        print("Error, not an event %s" % event)
         return
     event = pickle.loads(event[7:-8])
     fire_ui_handlers(event, d)
@@ -140,6 +138,7 @@ def remove(name, handler):
 def register_UIHhandler(handler):
     bb.event._ui_handler_seq = bb.event._ui_handler_seq + 1
     _ui_handlers[_ui_handler_seq] = handler
+    bb.event.useStdout = False
     return _ui_handler_seq
 
 def unregister_UIHhandler(handlerNum):
diff --git a/bitbake/lib/bb/msg.py b/bitbake/lib/bb/msg.py
index 8d2bcce452..5bb30e8dd3 100644
--- a/bitbake/lib/bb/msg.py
+++ b/bitbake/lib/bb/msg.py
@@ -109,7 +109,7 @@ def debug(level, msgdomain, msg, fn = None):
 
     if debug_level[msgdomain] >= level:
         bb.event.fire(MsgDebug(msg), None)
-        if not bb.event._ui_handlers:
+        if bb.event.useStdout:
             print('DEBUG: %s' % (msg))
 
 def note(level, msgdomain, msg, fn = None):
@@ -118,17 +118,18 @@ def note(level, msgdomain, msg, fn = None):
 
     if level == 1 or verbose or debug_level[msgdomain] >= 1:
         bb.event.fire(MsgNote(msg), None)
-        if not bb.event._ui_handlers:
+        if bb.event.useStdout:
             print('NOTE: %s' % (msg))
 
 def warn(msgdomain, msg, fn = None):
     bb.event.fire(MsgWarn(msg), None)
-    if not bb.event._ui_handlers:
+    if bb.event.useStdout:
         print('WARNING: %s' % (msg))
 
 def error(msgdomain, msg, fn = None):
     bb.event.fire(MsgError(msg), None)
-    print('ERROR: %s' % (msg))
+    if bb.event.useStdout:
+       print('ERROR: %s' % (msg))
 
 def fatal(msgdomain, msg, fn = None):
     bb.event.fire(MsgFatal(msg), None)
@@ -137,5 +138,5 @@ def fatal(msgdomain, msg, fn = None):
 
 def plain(msg, fn = None):
     bb.event.fire(MsgPlain(msg), None)
-    if not bb.event._ui_handlers:
+    if bb.event.useStdout:
         print(msg)
diff --git a/bitbake/lib/bb/runqueue.py b/bitbake/lib/bb/runqueue.py
index 9127f248d5..b2d5fc01ab 100644
--- a/bitbake/lib/bb/runqueue.py
+++ b/bitbake/lib/bb/runqueue.py
@@ -23,6 +23,7 @@ Handles preparation and execution of a queue of tasks
 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
 import bb, os, sys
+import subprocess
 from bb import msg, data, event
 import signal
 import stat
@@ -937,6 +938,7 @@ class RunQueueExecute:
         self.runq_complete = []
         self.build_pids = {}
         self.build_pipes = {}
+        self.build_procs = {}
         self.failed_fnids = []
 
     def runqueue_process_waitpid(self):
@@ -944,19 +946,22 @@ class RunQueueExecute:
         Return none is there are no processes awaiting result collection, otherwise
         collect the process exit codes and close the information pipe.
         """
-        result = os.waitpid(-1, os.WNOHANG)
-        if result[0] is 0 and result[1] is 0:
-            return None
-        task = self.build_pids[result[0]]
-        del self.build_pids[result[0]]
-        self.build_pipes[result[0]].close()
-        del self.build_pipes[result[0]]
-        if result[1] != 0:
-            self.task_fail(task, result[1])
-        else:
-            self.task_complete(task)
-            self.stats.taskCompleted()
-            bb.event.fire(runQueueTaskCompleted(task, self.stats, self.rq), self.cfgData)
+        for pid in self.build_procs.keys():
+            proc = self.build_procs[pid]
+            proc.poll()
+            if proc.returncode is not None:
+                task = self.build_pids[pid]
+                del self.build_pids[pid]
+                self.build_pipes[pid].close()
+                del self.build_pipes[pid]
+                del self.build_procs[pid]
+                if proc.returncode != 0:
+                    self.task_fail(task, proc.returncode)
+                else:
+                    self.task_complete(task)
+                    self.stats.taskCompleted()
+                    bb.event.fire(runQueueTaskCompleted(task, self.stats, self.rq), self.cfgData)
+
 
     def finish_now(self):
         if self.stats.active:
@@ -990,31 +995,8 @@ class RunQueueExecute:
     def fork_off_task(self, fn, task, taskname):
         sys.stdout.flush()
         sys.stderr.flush()
-        try:
-            pipein, pipeout = os.pipe()
-            pid = os.fork() 
-        except OSError as e: 
-            bb.msg.fatal(bb.msg.domain.RunQueue, "fork failed: %d (%s)" % (e.errno, e.strerror))
-        if pid == 0:
-            os.close(pipein)
-            # Save out the PID so that the event can include it the
-            # events
-            bb.event.worker_pid = os.getpid()
-            bb.event.worker_pipe = pipeout
-
-            self.rq.state = runQueueChildProcess
-            # Make the child the process group leader
-            os.setpgid(0, 0)
-            # No stdin
-            newsi = os.open('/dev/null', os.O_RDWR)
-            os.dup2(newsi, sys.stdin.fileno())
-            # Stdout to a logfile
-            #logout = data.expand("${TMPDIR}/log/stdout.%s" % os.getpid(), self.cfgData, True)
-            #mkdirhier(os.path.dirname(logout))
-            #newso = open(logout, 'w')
-            #os.dup2(newso.fileno(), sys.stdout.fileno())
-            #os.dup2(newso.fileno(), sys.stderr.fileno())
 
+        try:
             bb.event.fire(runQueueTaskStarted(task, self.stats, self.rq), self.cfgData)
             bb.msg.note(1, bb.msg.domain.RunQueue,
                         "Running task %d of %d (ID: %s, %s)" % (self.stats.completed + self.stats.active + self.stats.failed + 1,
@@ -1022,26 +1004,25 @@ class RunQueueExecute:
                                                                 task,
                                                                 self.rqdata.get_user_idstring(task)))
 
-            bb.data.setVar("__RUNQUEUE_DO_NOT_USE_EXTERNALLY", self, self.cooker.configuration.data)
-            bb.data.setVar("__RUNQUEUE_DO_NOT_USE_EXTERNALLY2", fn, self.cooker.configuration.data)
-            try:
-                the_data = self.cooker.bb_cache.loadDataFull(fn, self.cooker.get_file_appends(fn), self.cooker.configuration.data)
-
-                if not self.cooker.configuration.dry_run:
-                    bb.build.exec_task(taskname, the_data)
-                os._exit(0)
-
-            except bb.build.EventException as e:
-                event = e.args[1]
-                bb.msg.error(bb.msg.domain.Build, "%s event exception, aborting" % bb.event.getName(event))
-                os._exit(1)
-            except Exception:
-                from traceback import format_exc
-                bb.msg.error(bb.msg.domain.Build, "Build of %s %s failed" % (fn, taskname))
-                bb.msg.error(bb.msg.domain.Build, format_exc())
-                os._exit(1)
-            os._exit(0)
-        return pid, pipein, pipeout
+            the_data = self.cooker.bb_cache.loadDataFull(fn, self.cooker.get_file_appends(fn), self.cooker.configuration.data)
+
+            env = bb.data.export_vars(the_data)
+
+            taskdep = self.rqdata.dataCache.task_deps[fn]
+            if 'fakeroot' in taskdep and taskname in taskdep['fakeroot']:
+                envvars = the_data.getVar("FAKEROOTENV", True).split()
+                for var in envvars:
+                    comps = var.split("=")
+                    env[comps[0]] = comps[1]
+
+            proc = subprocess.Popen(["bitbake-runtask", fn, taskname, str(self.cooker.configuration.dry_run)], env=env, stdout=subprocess.PIPE, stdin=subprocess.PIPE)
+            pipein = proc.stdout
+            pipeout = proc.stdin
+            pid = proc.pid
+        except OSError as e: 
+            bb.msg.fatal(bb.msg.domain.RunQueue, "fork failed: %d (%s)" % (e.errno, e.strerror))
+
+        return proc
 
 class RunQueueExecuteTasks(RunQueueExecute):
     def __init__(self, rq):
@@ -1153,10 +1134,11 @@ class RunQueueExecuteTasks(RunQueueExecute):
                     self.task_skip(task)
                     continue
 
-                pid, pipein, pipeout = self.fork_off_task(fn, task, taskname)
+                proc = self.fork_off_task(fn, task, taskname)
 
-                self.build_pids[pid] = task
-                self.build_pipes[pid] = runQueuePipe(pipein, pipeout, self.cfgData)
+                self.build_pids[proc.pid] = task
+                self.build_procs[proc.pid] = proc
+                self.build_pipes[proc.pid] = runQueuePipe(proc.stdout, proc.stdin, self.cfgData)
                 self.runq_running[task] = 1
                 self.stats.taskActive()
                 if self.stats.active < self.number_tasks:
@@ -1356,10 +1338,11 @@ class RunQueueExecuteScenequeue(RunQueueExecute):
                 self.task_skip(task)
                 return True
 
-            pid, pipein, pipeout = self.fork_off_task(fn, realtask, taskname)
+            proc = self.fork_off_task(fn, realtask, taskname)
 
-            self.build_pids[pid] = task
-            self.build_pipes[pid] = runQueuePipe(pipein, pipeout, self.cfgData)
+            self.build_pids[proc.pid] = task
+            self.build_procs[proc.pid] = proc
+            self.build_pipes[proc.pid] = runQueuePipe(proc.stdout, proc.stdin, self.cfgData)
             self.runq_running[task] = 1
             self.stats.taskActive()
             if self.stats.active < self.number_tasks:
@@ -1384,7 +1367,6 @@ class RunQueueExecuteScenequeue(RunQueueExecute):
         self.rq.state = runQueueRunInit
         return True
 
-
 class TaskFailure(Exception):
     """
     Exception raised when a task in a runqueue fails
@@ -1437,14 +1419,14 @@ class runQueueTaskCompleted(runQueueEvent):
         runQueueEvent.__init__(self, task, stats, rq)
         self.message = "Task %s completed (%s)" % (task, self.taskstring)
 
-def check_stamp_fn(fn, taskname, d):
-    rq = bb.data.getVar("__RUNQUEUE_DO_NOT_USE_EXTERNALLY", d)
-    fn = bb.data.getVar("__RUNQUEUE_DO_NOT_USE_EXTERNALLY2", d)
-    fnid = rq.rqdata.taskData.getfn_id(fn)
-    taskid = rq.get_task_id(fnid, taskname)
-    if taskid is not None:
-        return rq.check_stamp_task(taskid)
-    return None
+#def check_stamp_fn(fn, taskname, d):
+#    rq = bb.data.getVar("__RUNQUEUE_DO_NOT_USE_EXTERNALLY", d)
+#    fn = bb.data.getVar("__RUNQUEUE_DO_NOT_USE_EXTERNALLY2", d)
+#    fnid = rq.rqdata.taskData.getfn_id(fn)
+#    taskid = rq.get_task_id(fnid, taskname)
+#    if taskid is not None:
+#        return rq.check_stamp_task(taskid)
+#    return None
 
 class runQueuePipe():
     """
@@ -1452,7 +1434,7 @@ class runQueuePipe():
     """
     def __init__(self, pipein, pipeout, d):
         self.fd = pipein
-        os.close(pipeout)
+        pipeout.close()
         fcntl.fcntl(self.fd, fcntl.F_SETFL, fcntl.fcntl(self.fd, fcntl.F_GETFL) | os.O_NONBLOCK)
         self.queue = ""
         self.d = d
@@ -1460,8 +1442,8 @@ class runQueuePipe():
     def read(self):
         start = len(self.queue)
         try:
-            self.queue = self.queue + os.read(self.fd, 1024)
-        except OSError:
+            self.queue = self.queue + self.fd.read(1024)
+        except IOError:
             pass
         end = len(self.queue)
         index = self.queue.find("</event>")
@@ -1476,4 +1458,4 @@ class runQueuePipe():
             continue
         if len(self.queue) > 0:
             print("Warning, worker left partial message")
-        os.close(self.fd)
+        self.fd.close()