22617d335c
A new redo-stamp program takes whatever you give it as stdin and uses it to calculate a checksum for the current target. If that checksum is the same as last time, then we consider the target to be unchanged, and we set checked_runid and stamp, but leave changed_runid alone. That will make future callers of redo-ifchange see this target as unmodified. However, this is only "half" support because by the time we run the .do script that calls redo-stamp, it's too late; the caller is a dependant of the stamped program, which is already being rebuilt, even if redo-stamp turns out to say that this target is unchanged. The other half is coming up.
29 lines
733 B
Text
29 lines
733 B
Text
rm -f stampy usestamp stampy.log usestamp.log
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echo one >inp
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../flush-cache.sh
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redo stampy
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[ "$(wc -l <stampy.log)" -eq 1 ] || exit 11
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redo-ifchange usestamp
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[ "$(wc -l <stampy.log)" -eq 1 ] || exit 21
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[ "$(wc -l <usestamp.log)" -eq 1 ] || exit 12
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../flush-cache.sh
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redo stampy
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[ "$(wc -l <stampy.log)" -eq 2 ] || exit 31
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[ "$(wc -l <usestamp.log)" -eq 1 ] || exit 32
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redo-ifchange usestamp
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[ "$(wc -l <stampy.log)" -eq 2 ] || exit 41
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[ "$(wc -l <usestamp.log)" -eq 1 ] || exit 42
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../flush-cache.sh
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echo two >inp
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redo stampy
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[ "$(wc -l <stampy.log)" -eq 3 ] || exit 51
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[ "$(wc -l <usestamp.log)" -eq 1 ] || exit 52
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redo-ifchange usestamp
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[ "$(wc -l <stampy.log)" -eq 3 ] || exit 61
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[ "$(wc -l <usestamp.log)" -eq 2 ] || exit 62
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