bitbake: print clear message for "bitbake -e ASSUME_PROVIDED"

"bitbake -e ASSUME_PROVIDED" should fail, but the error message wasn't
clear enough in the past:

$ bitbake -e bzip2-native
[snip]
ERROR: Command execution failed: Traceback (most recent call last):
  File "/buildarea/lyang1/poky/bitbake/lib/bb/command.py", line 94, in
runAsyncCommand
    commandmethod(self.cmds_async, self, options)
  File "/buildarea/lyang1/poky/bitbake/lib/bb/command.py", line 323, in
showEnvironmentTarget
    command.cooker.showEnvironment(None, pkg)
  File "/buildarea/lyang1/poky/bitbake/lib/bb/cooker.py", line 325, in
showEnvironment
    fnid = taskdata.build_targets[targetid][0]
KeyError: 0
[snip]

With this patch, the massage will be:
[snip]
ERROR: bzip2-native is in ASSUME_PROVIDED
ERROR: Command execution failed: Exited with 1

Summary: There were 2 ERROR messages shown, returning a non-zero exit code.

[YOCTO #3392]

(Bitbake rev: f31447dac92454c822d4ebb7dd48e96c6c69dde4)

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/bitbake/lib/bb/cooker.py b/bitbake/lib/bb/cooker.py
index e299059401..5f88f1ff59 100644
--- a/bitbake/lib/bb/cooker.py
+++ b/bitbake/lib/bb/cooker.py
@@ -313,6 +313,10 @@ class BBCooker:
         elif len(pkgs_to_build) == 1:
             self.updateCache()
 
+            ignore = self.configuration.data.getVar("ASSUME_PROVIDED", True) or ""
+            if pkgs_to_build[0] in set(ignore.split()):
+                bb.fatal("%s is in ASSUME_PROVIDED" % pkgs_to_build[0])
+
             localdata = data.createCopy(self.configuration.data)
             bb.data.update_data(localdata)
             bb.data.expandKeys(localdata)