bitbake: Share BB_TASKDEPDATA with tasks

Currently tasks have no knowledge of which other tasks they depend
upon. This makes it impossible to do at least two things which would be
desirable/interesting:

a) Have the ability to create per recipe sysroots
b) Allow the aclocal files to be present only for the entries in
   DEPENDS (directly and indirectly)

By exporting task data through this new variable, tasks can inspect
their dependencies and then take actions based upon this.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 4 insertions, 3 deletions

diff --git a/bin/bitbake-worker b/bin/bitbake-worker
index ff20c1ca9..bc13b4f31 100755
--- a/bin/bitbake-worker
+++ b/bin/bitbake-worker
@@ -81,7 +81,7 @@ def workerlog_write(msg):
         lf.write(msg)
         lf.flush()
 
-def fork_off_task(cfg, data, workerdata, fn, task, taskname, appends, quieterrors=False):
+def fork_off_task(cfg, data, workerdata, fn, task, taskname, appends, taskdepdata, quieterrors=False):
     # We need to setup the environment BEFORE the fork, since
     # a fork() or exec*() activates PSEUDO...
 
@@ -148,6 +148,7 @@ def fork_off_task(cfg, data, workerdata, fn, task, taskname, appends, quieterror
                 os.umask(umask)
 
             data.setVar("BB_WORKERCONTEXT", "1")
+            data.setVar("BB_TASKDEPDATA", taskdepdata)
             data.setVar("BUILDNAME", workerdata["buildname"])
             data.setVar("DATE", workerdata["date"])
             data.setVar("TIME", workerdata["time"])
@@ -300,10 +301,10 @@ class BitbakeWorker(object):
         sys.exit(0)
 
     def handle_runtask(self, data):
-        fn, task, taskname, quieterrors, appends = pickle.loads(data)
+        fn, task, taskname, quieterrors, appends, taskdepdata = pickle.loads(data)
         workerlog_write("Handling runtask %s %s %s\n" % (task, fn, taskname))
 
-        pid, pipein, pipeout = fork_off_task(self.cookercfg, self.data, self.workerdata, fn, task, taskname, appends, quieterrors)
+        pid, pipein, pipeout = fork_off_task(self.cookercfg, self.data, self.workerdata, fn, task, taskname, appends, taskdepdata, quieterrors)
 
         self.build_pids[pid] = task
         self.build_pipes[pid] = runQueueWorkerPipe(pipein, pipeout)