Include stylesheets

With relative links, so that I can just view HTML files on my disk
without spawning a webserver.

4 files changed, 43 insertions, 9 deletions

diff --git a/repo/www/Makefile b/repo/www/Makefile
index aa48971..86d1d98 100644
--- a/repo/www/Makefile
+++ b/repo/www/Makefile
@@ -14,6 +14,7 @@ page_patterns = $(foreach ext,$(EXTENSIONS),'$(TOP_DIR)/**.$(ext)')
 page_folders = $(call dirnames,$(shell git ls-files $(page_patterns)))
 top_readme = $(shell git ls-files $(addprefix $(TOP_DIR)/README.,$(EXTENSIONS)))
 html_template = template.html
+stylesheets_src =
 lua_filters = convert-internal-links.lua
 
 all: site
@@ -42,14 +43,17 @@ $(dependencies): $(site_tree) | $(cache)
 
 include $(dependencies)
 
-site: $(pages) $(indices)
+stylesheets_dir = $(OUT_DIR)/style
+stylesheets = $(foreach s,$(stylesheets_src),$(stylesheets_dir)/$(s))
+
+site: $(pages) $(indices) $(stylesheets) $(stylesheets)
 
 # List of output folders.  Compute this from the full list of HTML
 # pages, since $(page_folders) may be missing some intermediate
 # directories (e.g. folders that only contain subfolders).
 html_folders = $(call dirnames,$(pages) $(indices))
 
-$(html_folders) $(cache):
+$(html_folders) $(stylesheets_dir) $(cache):
 	mkdir -p $@
 
 $(pages) $(subindices): $(title)
@@ -60,6 +64,7 @@ $(pages): $(OUT_DIR)/%.html:
 	$(call v,PAGE,$*)                                               \
 	./generate-page.py --site-title="$$(cat $(title))" --title="$*" \
 		$(foreach f,$(lua_filters),--lua-filter $(f))           \
+		$(foreach s,$(stylesheets_src),--stylesheet style/$(s)) \
 		--template=$(html_template) $< $@
 
 top_index = $(OUT_DIR)/index.html
@@ -74,8 +79,12 @@ $(indices): $(OUT_DIR)/%index.html:
 	$(call v,INDEX,$*)                                                      \
 	./generate-index.py $(index_options) --template=$(html_template)        \
 		$(foreach f,$(lua_filters),--lua-filter $(f))                   \
+		$(foreach s,$(stylesheets_src),--stylesheet style/$(s))         \
 		$(site_tree) "$(patsubst %/,%,$*)" $@
 
+$(stylesheets): $(stylesheets_dir)/%.css: %.css | $(stylesheets_dir)
+	cp $< $@
+
 clean:
 	-rm -r $(cache)
 	-rm -r $(OUT_DIR)
diff --git a/repo/www/generate-index.py b/repo/www/generate-index.py
index 116a454..d615756 100755
--- a/repo/www/generate-index.py
+++ b/repo/www/generate-index.py
@@ -3,6 +3,7 @@
 from argparse import ArgumentParser
 from itertools import chain
 import json
+from os import path
 from pathlib import Path
 from subprocess import run
 from tempfile import NamedTemporaryFile
@@ -25,6 +26,10 @@ def parse_arguments():
         help='Lua filter to run the page through.'
     )
     parser.add_argument(
+        '--stylesheet', dest='css', action='append',
+        help='CSS stylesheet to link to.'
+    )
+    parser.add_argument(
         'site_tree', help='JSON file describing the page tree.'
     )
     parser.add_argument(
@@ -89,7 +94,14 @@ def main(arguments):
 
     html_toc = format_toc(folders, pages)
 
-    index_title = f'Index for {target}' if target else 'Index'
+    if target:
+        index_title = f'Index for {target}'
+        path_to_top = path.relpath('.', target)
+    else:
+        index_title = 'Index'
+        path_to_top = '.'
+
+    stylesheets = (path.join(path_to_top, s) for s in arguments.css)
 
     if readme is not None:
         repo_top = Repo(search_parent_directories=True).working_dir
@@ -105,8 +117,8 @@ def main(arguments):
             toc.flush()
 
             pandoc(readme_path, arguments.output, arguments.template,
-                   arguments.filters, site_title=arguments.site_title,
-                   title=page_title, include_after=(toc.name,))
+                   arguments.filters, stylesheets, title=page_title,
+                   site_title=arguments.site_title, include_after=(toc.name,))
         return
 
     with NamedTemporaryFile(suffix='.md') as dummy_readme, \
@@ -115,8 +127,8 @@ def main(arguments):
         toc.flush()
 
         pandoc(dummy_readme.name, arguments.output, arguments.template,
-               arguments.filters, site_title=arguments.site_title,
-               title=index_title, include_after=(toc.name,))
+               arguments.filters, stylesheets, title=index_title,
+               site_title=arguments.site_title, include_after=(toc.name,))
 
 
 if __name__ == '__main__':
diff --git a/repo/www/generate-page.py b/repo/www/generate-page.py
index c9fa0e4..e200a9e 100755
--- a/repo/www/generate-page.py
+++ b/repo/www/generate-page.py
@@ -1,6 +1,9 @@
 #!/usr/bin/env python3
 
 from argparse import ArgumentParser
+from os import path
+
+from git import Repo
 
 from helpers import pandoc
 
@@ -18,6 +21,10 @@ def parse_arguments():
         help='Lua filter to run the page through.'
     )
     parser.add_argument(
+        '--stylesheet', dest='css', action='append',
+        help='CSS stylesheet to link to.'
+    )
+    parser.add_argument(
         '--title', help='Page title.'
     )
     parser.add_argument(
@@ -30,11 +37,16 @@ def parse_arguments():
 
 
 def main(arguments):
+    repo_top = Repo(search_parent_directories=True).working_dir
+    path_to_top = path.relpath(repo_top, path.dirname(arguments.page))
+    stylesheets = (path.join(path_to_top, s) for s in arguments.css)
+
     pandoc(
         arguments.page,
         arguments.output,
         arguments.template,
         arguments.filters,
+        stylesheets,
         title=arguments.title,
         site_title=arguments.site_title
     )
diff --git a/repo/www/helpers.py b/repo/www/helpers.py
index afdb64b..9b97902 100644
--- a/repo/www/helpers.py
+++ b/repo/www/helpers.py
@@ -56,11 +56,12 @@ def deserialize_directories(directories):
     }
 
 
-def pandoc(page, output, template, filters, title=None, site_title=None,
-           include_after=()):
+def pandoc(page, output, template, filters, stylesheets, title=None,
+           site_title=None, include_after=()):
     cmd = (
         'pandoc', '-s', page, '-o', output, '--template', template,
         *chain(*(('--lua-filter', f) for f in filters)),
+        *chain(*(('--css', s) for s in stylesheets)),
         *chain(*(('--include-after-body', f) for f in include_after))
     )