Allow running builds against a custom local guidelines folder #4182
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These changes are part 1 of 2 to enable preview builds against the
WCAG-2.1
branch. This part applies to themain
branch; see #4183 for part 2, which applies toWCAG-2.1
.This adds logic to
getPrinciples
andgetTermsMap
code flows to allow explicitly specifying a localguidelines/index.html
path when building for a specific version, to be used in place of requesting the latest published recommendation for the specifiedWCAG_VERSION
. This allows us to directly reuse the build process from themain
branch for generating preview builds againstWCAG-2.1
, rather than needing to copy the entire Eleventy build process to that branch and keep it in sync.I have verified that this does not cause any changes to existing builds without the new variable, with
WCAG_VERSION
set to22
,21
, or unset.