[Scons-users] Customize build decision logic for phony targets, that doesn't involve files

[Andrew Pashkin]

On 03/28/2016 06:47 PM, Bill Deegan wrote:
> Andrew,
>
> No, Value() is specifically for any value, not just files, so you 
> could create a Value() node which holds the output from git ls-remote 
> as the source for your builder.
> That should be sufficient, then if it changes, it would cause the 
> builder to run.
But why this script continues to rebuilding target after the first build?

    env = Environment()

    def action(**_):
         print('Do crazy things')

    input = env.Value('a')

    env['BUILDERS']['Custom'] = Builder(action=action)
    env.Custom(target='target', source=input)
    env.Pseudo('target')

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