From ad910dafcc38f7d4aad5c9c28dc0be9dae8c3b5c Mon Sep 17 00:00:00 2001
From: "Niels G. W. Serup" <ngws@metanohi.name>
Date: Fri, 26 Aug 2016 15:26:30 +0200
Subject: [PATCH] Add basic site generation scripts.

---
 scripts/transform-file.py | 100 ++++++++++++++++++++++++++++++++++++++
 scripts/transform-site.sh |  18 +++++++
 2 files changed, 118 insertions(+)
 create mode 100755 scripts/transform-file.py
 create mode 100755 scripts/transform-site.sh

diff --git a/scripts/transform-file.py b/scripts/transform-file.py
new file mode 100755
index 0000000..82c4dae
--- /dev/null
+++ b/scripts/transform-file.py
@@ -0,0 +1,100 @@
+#!/usr/bin/env python3
+
+'''
+Transforms a file into a web-servable file.
+
+In most cases this entails either
+
+  + just symlinking, or
+  + transforming a page to html
+'''
+
+import sys
+import os
+import html
+import subprocess
+
+
+def read(path):
+    with open(path) as f:
+        return f.read()
+
+def write(path, text):
+    with open(path, 'w') as f:
+        f.write(text)
+
+
+script_dir = os.path.dirname(__file__)
+base_dir = os.path.split(script_dir)[0]
+template_dir = os.path.join(base_dir, 'template')
+template_base_file = os.path.join(template_dir, 'base.html')
+template_base = read(template_base_file)
+
+
+def pandoc(filename):
+    proc = subprocess.run(['pandoc', filename], stdout=subprocess.PIPE)
+    return proc.stdout.decode('utf-8').strip()
+
+def indent_block(t, block):
+    return '\n'.join(t + line for line in block.split('\n'))
+
+def extract_markdown_title(filename):
+    with open(filename) as f:
+        for line in f:
+            if line.startswith('# '):
+                return line[2:].strip()
+    if filename.endswith('.md'):
+        return os.path.basename(filename)[:-3]
+
+def markdown_to_html(input_file, output_dir):
+    title = extract_markdown_title(input_file)
+    title = html.escape(title)
+    content = indent_block(8 * ' ', pandoc(input_file))
+    html_out = template_base.format(title=title, content=content)
+    output_file = os.path.join(
+        output_dir,
+        os.path.splitext(os.path.basename(input_file))[0]
+        + '.html')
+    write(output_file, html_out)
+
+def symlink_relative(input_file, output_dir):
+    in_path_abs = os.path.abspath(input_file)
+    os.chdir(output_dir)
+    in_path_rel = os.path.relpath(in_path_abs)
+    output_file = os.path.basename(input_file)
+    os.symlink(in_path_rel, output_file)
+
+def get_extension(filename):
+    _, extension = os.path.splitext(filename)
+    extension = extension[1:]
+    return extension
+    
+def transform(input_file, output_dir):
+    extension = get_extension(input_file)
+
+    actions = {
+        'md': lambda: markdown_to_html(input_file, output_dir)
+    }
+    try:
+        action = actions[extension]
+    except KeyError:
+        action = lambda: symlink_relative(input_file, output_dir)
+    action()
+    return 0
+
+def main(args):
+    try:
+        [input_file, output_dir] = args
+    except ValueError:
+        print_usage()
+        return 1
+
+    transform(input_file, output_dir)
+
+def print_usage():
+    print('''\
+usage: transform-file.py INPUT_FILE OUTPUT_DIRECTORY
+''')
+    
+if __name__ == '__main__':
+    sys.exit(main(sys.argv[1:]))
diff --git a/scripts/transform-site.sh b/scripts/transform-site.sh
new file mode 100755
index 0000000..b1bda95
--- /dev/null
+++ b/scripts/transform-site.sh
@@ -0,0 +1,18 @@
+#!/bin/sh
+#
+# Transform the entire site into something suitable for a web server.
+
+set -e # Exit on first error.
+
+cd "$(dirname "$0")/.."
+
+rm -rf web-serve
+mkdir web-serve
+
+for file in $(cd site; find -type f); do
+    file="$(echo $file | sed -r 's/^\.\/?//')"
+    dir="$(dirname $file)"
+    outdir="web-serve/$dir"
+    mkdir -p "$outdir"
+    ./scripts/transform-file.py "site/$file" "$outdir"
+done