Use text replacement to modify dockerfile once/day for windows#424
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Use text replacement to modify dockerfile once/day for windows#424
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brawner
commented
Apr 9, 2020
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| # Invalidate once a day to cause online installers to check for updates | ||
| RUN echo %TODAYS_DATE% | ||
| RUN echo "@todays_date" |
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Becomes:
RUN echo "Thursday, April 9, 2020"
cottsay
approved these changes
Apr 9, 2020
nuclearsandwich
approved these changes
Apr 9, 2020
| set DOCKERFILE=windows_docker_resources\Dockerfile.msvc%CI_VISUAL_STUDIO_VERSION% | ||
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| rem "Change dockerfile once per day to invalidate docker caches" | ||
| powershell "(Get-Content ${Env:DOCKERFILE}).replace('@todays_date', $(Get-Date).ToLongDateString()) | Set-Content ${Env:DOCKERFILE}" |
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I forgot that this would need to be escaped in order for empty to render the @-sign through: #426
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The previous approach of using a dockerfile
ARGwould not actually invalidate caches once-per-day as a--build-argis apparently not part of the context.This implements a solution similar to
sedwhich is used with the linux dockerfile.