[Scons-users] How to tell if a node is an explicit command-line argument?

Gary Oberbrunner garyo at oberbrunner.com
Sun Jul 26 21:46:53 EDT 2015


Sure, this seems very helpful!

On Sun, Jul 26, 2015 at 9:37 PM, William Blevins <wblevins001 at gmail.com>
wrote:

> Does this interest anyone?  I think it could be a very convenient debug
> mechanism because environment information queries currently require scripts
> modifications.
>
> V/R,
> William
>
> On Sat, Jul 25, 2015 at 4:23 PM, William Blevins <wblevins001 at gmail.com>
> wrote:
>
>> Bill,
>>
>> Long story short, I was investigating making a new debug option.  The
>> option would perform print env.Dump() for a node's builder environment, but
>> I wanted to print on for explicit targets.
>>
>> Here is a working patch delta, but my check seems a bit sketchy.
>>
>> diff -r e6d4edfedcb4 src/engine/SCons/Node/__init__.py
>> --- a/src/engine/SCons/Node/__init__.py    Mon Jun 29 07:04:53 2015 -0400
>> +++ b/src/engine/SCons/Node/__init__.py    Mon Jun 29 10:54:02 2015 -0400
>> @@ -1141,6 +1141,12 @@
>>          the command interpreter literally."""
>>          return 1
>>
>> +    def generate_dump(self):
>> +        env = self.get_build_env()
>> +        if env:
>> +            return env.Dump()
>> +        return None
>> +
>>      def render_include_tree(self):
>>          """
>>          Return a text representation, suitable for displaying to the
>> diff -r e6d4edfedcb4 src/engine/SCons/Script/Main.py
>> --- a/src/engine/SCons/Script/Main.py    Mon Jun 29 07:04:53 2015 -0400
>> +++ b/src/engine/SCons/Script/Main.py    Mon Jun 29 10:54:02 2015 -0400
>> @@ -300,6 +300,13 @@
>>                  if tree:
>>                      print
>>                      print tree
>> +
>> +        if self.options.debug_dump:
>> +            t = self.targets[0]
>> +            if t.get_path() in SCons.Script.COMMAND_LINE_TARGETS:
>> +                print 'Environment dump for node: ' + str(t)
>> +                print t.generate_dump()
>> +
>>          SCons.Taskmaster.OutOfDateTask.postprocess(self)
>>
>>      def make_ready(self):
>> @@ -653,6 +660,7 @@
>>      if "findlibs" in debug_values:
>>          SCons.Scanner.Prog.print_find_libs = "findlibs"
>>      options.debug_includes = ("includes" in debug_values)
>> +    options.debug_dump = ("dump" in debug_values)
>>      print_memoizer = ("memoizer" in debug_values)
>>      if "memory" in debug_values:
>>          memory_stats.enable(sys.stdout)
>> diff -r e6d4edfedcb4 src/engine/SCons/Script/SConsOptions.py
>> --- a/src/engine/SCons/Script/SConsOptions.py    Mon Jun 29 07:04:53 2015
>> -0400
>> +++ b/src/engine/SCons/Script/SConsOptions.py    Mon Jun 29 10:54:02 2015
>> -0400
>> @@ -673,7 +673,7 @@
>>          "tree"          : '; please use --tree=all instead',
>>      }
>>
>> -    debug_options = ["count", "duplicate", "explain", "findlibs",
>> +    debug_options = ["count", "duplicate", "dump", "explain", "findlibs",
>>                       "includes", "memoizer", "memory", "objects",
>>                       "pdb", "prepare", "presub", "stacktrace",
>>                       "time"]
>>
>>
>> V/R,
>> William
>>
>> On Sat, Jul 25, 2015 at 4:00 PM, William Blevins <wblevins001 at gmail.com>
>> wrote:
>>
>>> SCons.Node has a function set_explicit, but after reading the function
>>> description, I don't think that is what this does?
>>>
>>> On Sat, Jul 25, 2015 at 3:56 PM, Bill Deegan <bill at baddogconsulting.com>
>>> wrote:
>>>
>>>> William,
>>>>
>>>>
>>>> On Sat, Jul 25, 2015 at 3:53 PM, William Blevins <wblevins001 at gmail.com
>>>> > wrote:
>>>>
>>>>>
>>>>>
>>>>> On Sat, Jul 25, 2015 at 3:52 PM, William Blevins <
>>>>> wblevins001 at gmail.com> wrote:
>>>>>
>>>>>> Yes, but here is an example in case:
>>>>>>
>>>>>> File "a.c" exists
>>>>>> File "b.c" exists
>>>>>>
>>>>>> FS node representing "a.c" is node_a and representing "b.c" is node_b
>>>>>>
>>>>>> If I run "scons" or "scons a.o", then node_b.is_explicit_target (or
>>>>>> some other function name) returns False.
>>>>>> If I run "scons b.o" or "scons a.o b.o", then
>>>>>> node_b.is_explicit_target return True for both cases, but
>>>>>> node_b.is_explicit_target return True only for the second case.
>>>>>>
>>>>>>
>>>>> Copy-pasta error fixed below:
>>>>> If I run "scons b.o" or "scons a.o b.o", then
>>>>> node_b.is_explicit_target return True for both cases, but
>>>>> node_a.is_explicit_target return True only for the second case.
>>>>>
>>>>
>>>> Isn't this what you'd expect?
>>>> I guess I'm missing where this doesn't answer your original question?
>>>> Also you can get the list of  command line arguments raw..
>>>>
>>>> -Bill
>>>>
>>>>
>>>>>
>>>>>
>>>>>
>>>>>> V/R,
>>>>>> William
>>>>>>
>>>>>> On Sat, Jul 25, 2015 at 3:32 PM, Bill Deegan <
>>>>>> bill at baddogconsulting.com> wrote:
>>>>>>
>>>>>>> So you mean if scons was run as: scons a/b/c/d.exe ?
>>>>>>>
>>>>>>> On Sat, Jul 25, 2015 at 2:13 PM, William Blevins <
>>>>>>> wblevins001 at gmail.com> wrote:
>>>>>>>
>>>>>>>> Is there an easy way to determine if a Node was specified
>>>>>>>> explicitly as a command-line argument?
>>>>>>>>
>>>>>>>> V/R,
>>>>>>>> William
>>>>>>>>
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>>>>>>>>
>>>>>>>>
>>>>>>>
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>>>>>>>
>>>>>>
>>>>>
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>>>>>
>>>>
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>>>
>>
>
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-- 
Gary
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