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Avoid Liquid failure with empty collections (#1092)

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Avoid Liquid failure when no pages with titles

Fix issue #1085

The user's config specified collections (incorrectly). Trying to build the site resulted in Jekyll failing due to a Liquid error. The error report did not suggest the cause of the error.

Liquid fails with division by 0 when title_pages_size is 0. This fix guards that code by checking that title_pages is non-empty.

To test:

1.  Specify a Jekyll collection with no pages, and specify it as a JTD collection.
2. Build the site.
3. Check that the specified collection has no nav links to pages.
This commit is contained in:
Peter Mosses 2022-12-27 18:46:18 +01:00 committed by GitHub
parent 0279757ff4
commit 0bfa011b47
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1 changed files with 17 additions and 15 deletions
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_includes/nav.html
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@ -39,6 +39,7 @@
pages. pages.
{%- endcomment -%} {%- endcomment -%}
{%- unless title_pages == empty -%}
{%- assign unsorted_pages = title_pages {%- assign unsorted_pages = title_pages
| where_exp: "item", "item.parent == nil" | where_exp: "item", "item.parent == nil"
| where_exp: "item", "item.nav_exclude == true" -%} | where_exp: "item", "item.nav_exclude == true" -%}
@ -54,6 +55,7 @@
{%- endfor -%} {%- endfor -%}
{%- assign title_pages = sorted_pages -%} {%- assign title_pages = sorted_pages -%}
{%- endif -%} {%- endif -%}
{%- endunless -%}
{%- assign nav_order_pages = title_pages {%- assign nav_order_pages = title_pages
| where_exp: "item", "item.nav_order != nil" -%} | where_exp: "item", "item.nav_order != nil" -%}