build-aux/Makefile.am (.version.xml): Only change timestamp on hash change
The timestamp of the file will now only be updated if the hash (version) _actually_ changes. This allows this to be used as a target dependency without forcing a rebuild each and every time.master
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RELEASES.md
12
RELEASES.md
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@ -13,6 +13,18 @@ TAME developers: Add new changes under a "NEXT" heading as part of the
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commits that introduce the changes. To make a new release, run
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`tools/mkrelease`, which will handle updating the heading for you.
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NEXT
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====
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This release contains changes to the build system to accommodate
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liza-proguic's introduction of step-based packages (in place of a monolithic
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`package-dfns.xml`), as well as miscellaneous improvements.
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Build System
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------------
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- Only modify `.version.xml` timestamp when hash changes. This allows
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its use as a dependency without forcefully rebuilding each and every time.
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v17.7.0 (2020-12-09)
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====================
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This release provides tail-call optimizations aimed at the query system in
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@ -190,9 +190,14 @@ c1map: $(dest_c1map)
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%.xml: %.csvo rater/core/vector/table.xmlo
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rater/tools/csv2xml $< > $@
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# This target is always run, but only update the file (and thus its
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# timestamp) if the hash actually changes, so that we do not rebuild any
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# dependencies unnecessarily.
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version: .version.xml
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.version.xml: FORCE
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git log HEAD^.. -1 --pretty=format:'<version>%h</version>' > .version.xml
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git log HEAD^.. -1 --pretty=format:'<version>%h</version>' > $@.new
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cmp $@ $@.new || mv $@.new $@
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$(RM) $@.new
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ui/program.expanded.xml: ui/program.xml $(program_fragments)
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$(TAME_TS)
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