[PATCH] meta/classes/base: fixed listtasks by copying code from oe-core

[claudius.heine.ext@siemens.com]

From: Claudius Heine <ch@denx.de>

The listtasks task seemed to be broken, here I fixed it by just copying
the code from openembedded-core.

Signed-off-by: Claudius Heine <ch@denx.de>
---
 meta/classes/base.bbclass | 27 +++++++++++++++++----------
 1 file changed, 17 insertions(+), 10 deletions(-)

diff --git a/meta/classes/base.bbclass b/meta/classes/base.bbclass
index 7d44f72..ede2c3e 100644
--- a/meta/classes/base.bbclass
+++ b/meta/classes/base.bbclass
@@ -37,16 +37,23 @@ bbfatal() {
 	exit 1
 }
 
-addtask showdata
-do_showdata[nostamp] = "1"
-python do_showdata() {
-	import sys
-	# emit variables and shell functions
-	bb.data.emit_env(sys.__stdout__, d, True)
-	# emit the metadata which isnt valid shell
-	for e in bb.data.keys(d):
-		if bb.data.getVarFlag(e, 'python', d):
-			sys.__stdout__.write("\npython %s () {\n%s}\n" % (e, bb.data.getVar(e, d, 1)))
+addtask listtasks
+do_listtasks[nostamp] = "1"
+python do_listtasks() {
+    taskdescs = {}
+    maxlen = 0
+    for e in d.keys():
+        if d.getVarFlag(e, 'task'):
+            maxlen = max(maxlen, len(e))
+            if e.endswith('_setscene'):
+                desc = "%s (setscene version)" % (d.getVarFlag(e[:-9], 'doc') or '')
+            else:
+                desc = d.getVarFlag(e, 'doc') or ''
+            taskdescs[e] = desc
+
+    tasks = sorted(taskdescs.keys())
+    for taskname in tasks:
+        bb.plain("%s  %s" % (taskname.ljust(maxlen), taskdescs[taskname]))
 }
 
 addtask listtasks
-- 
2.15.1