[Scons-users] Need Help - Renaming an input file does not re-trigger SCons builder

[Bill Deegan]

So if you change:
    result1 = env.Foo("__proc_done.txt",    [

"src/work/dds/codeSymbols.grl",
                                                "src/work/dds/gtypes_dds_1.
grl",

"src/work/dds/iopt_memmap.grl",
                                                "src/work/dds/@ecu_add_test.
grl"
                                            ]
                    )

to
    result1 = env.Foo("src/work/dds/codeSymbols.grl",    [

"src/work/dds/codeSymbols.grl",
                                                "src/work/dds/gtypes_dds_1.
grl",

"src/work/dds/iopt_memmap.grl",
                                                "src/work/dds/@ecu_add_test.
grl"
                                            ]
                    )

It doesn't rebuild?
I'm not sure what you're saying you're changing which is not resulting in
an action running.
(Also please don't change the color of the text, it makes it quite hard to
read)

-Bill
SCons Project Co-Manager

On Thu, Feb 1, 2018 at 8:41 PM, Basil Mathew <iambasilmathew at gmail.com>
wrote:

> Hello all,
>
> I am fairly new to SCons and to Python; hence, please excuse if this is a
> silly question.
>
> I am using SCons version "v2.4.0.rel_2.4.0:3365:9259ea1c13d7". I was
> playing around with some very basic topics in SCons to get myself
> acquainted with SCons when I came across the strange scenario that SCons
> does not execute the builder when I rename one of the input file to a
> target without changing its content. I was really surprised since I was
> expecting the SCons to recognize that the input files list has
> changed(though not its content) and execute the builder. Please see the
> content of the SConstruct file that I have been using.
>
> import os
> import sys
> import SCons
> import subprocess
>
> DefaultEnvironment(tools = [])
>
> input_files_list = []
> process_option_list = []
> process_exec_cmd_line = ''
> target_name = ''
>
> def command_process_executor_builder(target, source, env):
>     target_file_path_name = target[0].get_abspath()
>
>     print "############### Executing Process"
>
>     return None
>
> def build():
>     global input_files_list, process_option_list, process_exec_cmd_line,
> target_name
>
>     env = DefaultEnvironment(tools = [])
>     a = Action(command_process_executor_builder, varlist=['my_arg',
> 'PROCESS_EXEC_CMD_LINE', 'PROCESS_OPTION_LIST'])
>
>     proc_exec_bldr = Builder(action = a)
>
>     env['my_arg'] = 'default-value'
>     env['PROCESS_EXEC_CMD_LINE'] = process_exec_cmd_line
>     env['PROCESS_OPTION_LIST'] = process_option_list
>
>     env.Append(BUILDERS = {'Foo' : proc_exec_bldr})
>
>     result1 = env.Foo("__proc_done.txt",    [
>
> "src/work/dds/codeSymbols.grl",
>                                                 "src/work/dds/gtypes_dds_1.
> grl",
>
> "src/work/dds/iopt_memmap.grl",
>
> "src/work/dds/@ecu_add_test.grl"
>                                             ]
>                     )
>
>
> build()
>
> I was wondering if this is the default behaviour of SCons when it comes to
> renaming input files or if there is some mistake with the way I am using
> SCons. If this is indeed the default behaviour of SCons, can some one let
> me know the reason behind this.
>
> Thank you
>
> Basil Mathew
>
>
>
> _______________________________________________
> Scons-users mailing list
> Scons-users at scons.org
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>
>
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