conflict with Decider('MD5-timestamp') and --implicit-deps-unchanged?

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Hash: SHA256

Hello,

comparing
v3.0.4.3a41ed6b288cee8d085373ad7fa02894e1903864,
2019-01-20 22:51:36, by bdeegan on kufra
against (worked good)
v3.0.3.27552f9e8d59c13c3567f2bd380b74e34ee25324,
2019-01-08 02:59:02, by bdbaddog on hpmicrodog

shows

"scons: rebuilding `dir2\file2.txt' because `dir1\file1.txt' changed"
even when the file did not change.

scons --implicit-deps-unchanged --tree=prune --debug=explain

first pass will process everthing, expected

on second pass:

scons: Reading SConscript files ...
scons: done reading SConscript files.
scons: Building targets ...
scons: `dir1\file1.txt' is up to date.
+-dir1\file1.txt
  +-file0.txt
scons: rebuilding `dir2\file2.txt' because `dir1\file1.txt' changed
Copy("dir2\file2.txt", "dir1\file1.txt")
+-dir2\file2.txt
  +-dir1\file1.txt
    +-file0.txt
scons: done building targets.


when disabling Decider('MD5-timestamp') or the
'--implicit-deps-unchanged' option,
the targets are considered up to date.



import os

# Decider('MD5')

#
Decider('MD5-timestamp')

def cp(target, source):
  Command(target, source, Copy("$TARGET", "$SOURCE"))
  Default(target)

f0 =                      'file0.txt'
f1 = os.path.join('dir1', 'file1.txt')
f2 = os.path.join('dir2', 'file2.txt')

cp(f1, f0)
cp(f2, f1)



maybe this is related to <https://github.com/SCons/scons/issues/2980>


regards

- --
Veit Kannegieser
software developer

Magneti Marelli GmbH
Instrument Cluster and Display

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Fax: +49 711 12371 198
mailto:[email protected]

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import os

# Decider('MD5')

#
Decider('MD5-timestamp')

def cp(target, source):
  Command(target, source, Copy("$TARGET", "$SOURCE"))
  Default(target)

f0 =                      'file0.txt'
f1 = os.path.join('dir1', 'file1.txt')
f2 = os.path.join('dir2', 'file2.txt')

cp(f1, f0)
cp(f2, f1)

@echo off
echo --- init ---
if exist dir1 rmdir /s /q dir1
if exist dir2 rmdir /s /q dir2
del /q /f .sconsign.dblite > nul
mkdir dir1
mkdir dir2
echo %date% %time% > file0.txt

@echo off
call _init.cmd
echo --- pass 1 ---
"C:\Program Files\Python37\python.exe" "C:\Program Files\Python37\Scripts\scons" --implicit-deps-unchanged --tree=prune --debug=explain
echo --- pass 2 ---
"C:\Program Files\Python37\python.exe" "C:\Program Files\Python37\Scripts\scons" --implicit-deps-unchanged --tree=prune --debug=explain
echo --- changing file0 ---
echo %date% %time% > file0.txt
echo --- pass 3 ---
"C:\Program Files\Python37\python.exe" "C:\Program Files\Python37\Scripts\scons" --implicit-deps-unchanged --tree=prune --debug=explain