adding option to use python simplehttp webserver module which doesn't require users to install lighttpd

.gitignore

@@ -1,2 +1,3 @@
 config.cfg
 lighttpd-fsfe.conf
+pywebserver-fsfe.log

README.md

@@ -1,3 +1,5 @@
 # FSFE Local Build
 
-FUll instructions can be found in an extensive blog post: https://blog.mehl.mx/2016/build-fsfe-websites-locally/
+This is a collection of scripts and configuration files necessary to build fsfe.org websites locally. 
+
+Full instructions can be found in an extensive blog post: https://blog.mehl.mx/2016/build-fsfe-websites-locally/

config.cfg.sample

@@ -1,13 +1,29 @@
+### BUILD DIRECTORIES ###
+
 # SVN trunk directory (repository with XHTML source files)
 LOC_trunk=~/subversion/fsfe/fsfe-web/trunk
 
 # Directory in which the result of the build process (html files) will be saved
 LOC_out=~/subversion/fsfe/local-build/fsfe.org
 
-# Path to lighttpd config file (default: points to a file in the same directory as the script)
-HTTPD_conf=$ROOT/lighttpd-fsfe.conf
-
 # Directory of the secondary SVN directory with which you made a first full build. 
 # Avoids having some generated files in your clean trunk. 
-# Default: Leave empty if you just want to use one SVN source directory
+# Default: Leave empty if you just want to use one SVN source directory (recommended)
 LOC_trunk_dev=
+
+
+### LOCAL WEBSERVER ###
+
+# Choose your local webserver. 
+# Default is "python" which is python's inbuilt http server that is available on most distributions
+# Use "lighttpd" if you want to use the Lighttpd webserver. This has to be configured manually (see guide)
+HTTPD=python
+
+# Choose on which port the webserver runs. This has no effect for "lighttpd". 
+HTTPD_port=5080
+
+# If you use other webservers like "lighttpd", this is the path to its config file 
+# Default: points to a lighttpd config file in the same directory as the script
+# Has no effect if you use the "python" webserver
+HTTPD_conf=$ROOT/lighttpd-fsfe.conf
+

fsfe-preview.sh

@@ -110,11 +110,25 @@ fi
 
 
 ### START WEBSERVER if necessary
-if [ ! $(pgrep lighttpd) ]; then
-  echo "[INFO] Starting webserver"
-  /usr/sbin/lighttpd -f $HTTPD_conf
-else
-  echo "[INFO] Webserver already seems to be running."
+if [ "$HTTPD" == "python" ]; then   # python
+  if [ ! $(pgrep -f "pywebserver-fsfe.py $LOC_out") ]; then
+    echo "[INFO] Starting $HTTPD webserver"
+    nohup "$ROOT/pywebserver-fsfe.py" "$LOC_out" "$HTTPD_port" > "$ROOT"/pywebserver-fsfe.log 2>&1 &
+  else
+    echo "[INFO] $HTTPD webserver already seems to be running."
+  fi
+elif [ "$HTTPD" == "lighttpd" ]; then
+  if [ ! $(pgrep lighttpd) ]; then   # lighttpd
+    echo "[INFO] Starting $HTTPD webserver"
+    /usr/sbin/lighttpd -f "$HTTPD_conf"
+  else
+    echo "[INFO] $HTTPD webserver already seems to be running."
+  fi
+elif [ "$HTTPD" == "" ]; then   # empty variable
+  echo "[ERROR] No webserver specified. Please define variable HTTPD in config.cfg. Aborting now."
+  exit 1
+else    # something custom
+  echo "[WARNING] Unknown webserver defined. Please check variable HTTPD in config.cfg." 
 fi
 
 ### SHOW RESULTS

pywebserver-fsfe.py

@@ -0,0 +1,15 @@
+#!/usr/bin/env python3
+
+import http.server
+import socketserver
+import os
+import sys
+
+WEB_DIR = sys.argv[1]
+WEB_PORT = int(sys.argv[2])
+
+os.chdir(WEB_DIR)
+
+Handler = http.server.SimpleHTTPRequestHandler
+httpd = socketserver.TCPServer(("", WEB_PORT), Handler)
+httpd.serve_forever()