From d0d869e06b30a1f8b7b539978caa0ed6123f9864 Mon Sep 17 00:00:00 2001
From: Kévin Le Gouguec <kevin.legouguec@gmail.com>
Date: Wed, 26 Aug 2020 00:17:32 +0200
Subject: Add breadcrumbs

Likewise, use relative links so that things work when just browsing
files locally without a server.

Next: tweak or remove redundant titles.
---
 repo/www/helpers.py | 29 ++++++++++++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

(limited to 'repo/www/helpers.py')

diff --git a/repo/www/helpers.py b/repo/www/helpers.py
index 9b97902..80b8857 100644
--- a/repo/www/helpers.py
+++ b/repo/www/helpers.py
@@ -57,7 +57,7 @@ def deserialize_directories(directories):
 
 
 def pandoc(page, output, template, filters, stylesheets, title=None,
-           site_title=None, include_after=()):
+           site_title=None, include_after=(), variables=None):
     cmd = (
         'pandoc', '-s', page, '-o', output, '--template', template,
         *chain(*(('--lua-filter', f) for f in filters)),
@@ -69,6 +69,33 @@ def pandoc(page, output, template, filters, stylesheets, title=None,
         cmd += ('-M', f'title={title}')
     if site_title is not None:
         cmd += ('-T', site_title)
+    if variables is not None:
+        cmd += tuple(chain(
+            *(('-V', f'{k}={v}') for k, v in variables.items())
+        ))
 
     environ['LUA_PATH'] = '.cache/?.lua;;'
     run(cmd, check=True)
+
+
+def generate_crumbs(target):
+    parts = ('(top)', *target.parts)
+
+    if parts[-1] == 'index':
+        *crumbs, current = parts[:-1]
+    else:
+        crumbs = parts[:-1]
+        current, _ = path.splitext(parts[-1])
+
+    crumbs_li = (
+        '<li><a href="{link}">{crumb}</a></li>'.format(
+            link=(path.relpath(path.join(*crumbs[1:i], 'index.html'),
+                               start=target.parent)),
+            crumb=crumb
+        )
+        for i, crumb in enumerate(crumbs, start=1)
+    )
+
+    current_li = f'<li aria-current="page">{current}</li>'
+
+    return '\n'.join((*crumbs_li, current_li))
-- 
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