add canonical extraction plugin

Author: marijanp

docs/css/style.css

@@ -448,6 +448,59 @@
       isolation: isolate;
     }
   }
+  .list {
+    display: flex;
+    flex-direction: column;
+    font-size: 0.875rem;
+    :where(.list-row) {
+      --list-grid-cols: minmax(0, auto) 1fr;
+      position: relative;
+      display: grid;
+      grid-auto-flow: column;
+      gap: calc(0.25rem * 4);
+      border-radius: var(--radius-box);
+      padding: calc(0.25rem * 4);
+      word-break: break-word;
+      grid-template-columns: var(--list-grid-cols);
+      &:has(.list-col-grow:nth-child(1)) {
+        --list-grid-cols: 1fr;
+      }
+      &:has(.list-col-grow:nth-child(2)) {
+        --list-grid-cols: minmax(0, auto) 1fr;
+      }
+      &:has(.list-col-grow:nth-child(3)) {
+        --list-grid-cols: minmax(0, auto) minmax(0, auto) 1fr;
+      }
+      &:has(.list-col-grow:nth-child(4)) {
+        --list-grid-cols: minmax(0, auto) minmax(0, auto) minmax(0, auto) 1fr;
+      }
+      &:has(.list-col-grow:nth-child(5)) {
+        --list-grid-cols: minmax(0, auto) minmax(0, auto) minmax(0, auto) minmax(0, auto) 1fr;
+      }
+      &:has(.list-col-grow:nth-child(6)) {
+        --list-grid-cols: minmax(0, auto) minmax(0, auto) minmax(0, auto) minmax(0, auto)
+        minmax(0, auto) 1fr;
+      }
+      :not(.list-col-wrap) {
+        grid-row-start: 1;
+      }
+    }
+    & > :not(:last-child) {
+      &.list-row, .list-row {
+        &:after {
+          content: "";
+          border-bottom: var(--border) solid;
+          inset-inline: var(--radius-box);
+          position: absolute;
+          bottom: calc(0.25rem * 0);
+          border-color: var(--color-base-content);
+          @supports (color: color-mix(in lab, red, red)) {
+            border-color: color-mix(in oklab, var(--color-base-content) 5%, transparent);
+          }
+        }
+      }
+    }
+  }
   .table {
     font-size: 0.875rem;
     position: relative;

plugins/extract-canonical.lua

@@ -0,0 +1,13 @@
+-- extract-canonical.lua
+canonical_link = HTML.select(page, "link[rel=\"canonical\"]")
+if Table.length(canonical_link) > 1 then
+  Plugin.fail("Found more than one canoncial link, make sure there is not more than one canonical link")
+end
+canonical_link = canonical_link[1]
+if canonical_link == nil then
+  Plugin.exit("No canonical link defined, nothing to do")
+end
+
+head = HTML.select_one(page, "head")
+HTML.append_child(head, canonical_link)
+HTML.delete(excerpt, canonical_link)

soupault.toml

@@ -96,6 +96,9 @@ section = "posts"
 [widgets.add-meta-description]
 widget = "add-meta-description"
 
+[widgets.extract-canonical]
+widget = "extract-canonical"
+
 [index]
   index = true