forked from ungleich-public/cdist
67 lines
1.7 KiB
Text
67 lines
1.7 KiB
Text
Meeting with: Steven, Thorsten, Nico
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Problem: execute my code only if somebody else's changed something.
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Proposals:
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1) Introduce new binary (Steven)
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gencode:
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if has_changed __file/etc/nginx.conf; then
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echo mycode
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fi
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2) Use -f plus new variable to cover .cdist/has_code:
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if [ -f $global/objects/__file/etc/nginx.conf/$has_code ]; then
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echo mycode
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fi
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And $has_code resolves to .cdist/has_code to cover the .cdist
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directory.
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3) Create a new tree that contains changed objects
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if [ -e $global/changed/__file/etc/nginx.conf ]; then
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echo mycode
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fi
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4) Use a \n seperated list
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if grep -q __file/etc/nginx.conf $global/changed; then
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echo mycode
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fi
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X) General problem (add to FAQ):
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When having "do something only if somebody else did something"
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it is possible that users get confused, because code will not
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be executed.
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This may especially happen in code development:
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a) User creates __file/etc/nginx.conf
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b) User creates a new type __nginx that restarts
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nginx, only if __file/etc/nginx.conf changed.
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But __file/etc/nginx.conf has already been deployed
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and thus will never be restarted.
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--------------------------------------------------------------------------------
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Introduce exclude/conflicts attribute for types?
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Handling in cdist vs. handling in the types themselves?
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Examples: __file, __link, __directory
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Need to handle errors on low level for those anyway.
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Conclusion: Wait until we need exclude in a different type.
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Pro:
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Throw error as soon as possible without touching the target.
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Contra:
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No needod for most cases.
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Very controversal for stuff like __package and __package_gem
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for instance: rails; Should those two conflict or not?
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