Make generation of demo.svg deterministic #625
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Helcaraxan
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Helcaraxan
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Jul 26, 2019
| @@ -1,11 +1,15 @@ | |||
| sudo: false | |||
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Removing this as it's deprecated according to Travis documentation.
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Any news from the maintainers ? |
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Unfortunately not. I can't seem to find any trace of their activity on the project over the past 3 weeks. Probably due to it being the summer holiday season, so quite understandable. 🙂 |
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thank you! |
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You're welcome. 🙂 Happy to see this getting merged! |
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While working on #605 we found out that the PR's CI revealed an unexpected diff in
docs/demo.svg. CI onmasterlooked fine as well but I could reproduce the failure nonetheless locally by runningmake -B docs/demo.svg.The rootcause is as follows:
The generation of
demo.svgdepends on a Node tool that is installed vianpm install svg-term-cli. Underneath this thenpmcommand performs its own recursive dependency resolution and fetches the latest version (that is compatible with any existing version constraints) of all required direct & indirect dependencies.The latest CI run on
masterdates back to 13/14 July and passed correctly. Since then thesvgoNPM package, a direct dependency ofsvg-term-cli, released a new minor version making the most recent version1.3.0instead of1.2.2which is still compatible with the>=1.0.3constraint defined bysvg-term-cli. The move from1.2.2to1.3.0apparently introduced a change that resulted in a diff in the generateddocs/demo.svgfile.The solution here (and which will help prevent this occurring in the future as well) is to fix the versions of all (in)direct dependencies used to install the
svg-term-clipackage.This is achieved by creating a fake NPM package in the
toolsfolder using apackage.jsonwithsvg-term-clias a dependency and apackage-lock.jsonfile to hardcode the required version for each dependency. This also allows us to runnpm ciinstead ofnpm install svg-term-cliwhich is designed specifically for the automated runs of a CI environment.This will make the generation of
docs/demo.svgdeterministic and allows the safe upgrade of any of the required package versions in the future via code-reviewed updates to thepackage.jsonandpackage-lock.jsonfiles.