diff --git a/main.py b/main.py
old mode 100644
new mode 100755
index 5a07b29..97ccd02
--- a/main.py
+++ b/main.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 """
 Compound HTML Transclusion Compiler
 Copyright (C) 2016  Damian Heaton <dh64784@gmail.com>
@@ -18,6 +19,7 @@
 
 import bs4
 import sys
+import os
 
 minify = False
 nocomm = False
@@ -40,72 +42,82 @@
         print("""Compound should be used with syntax thus:
     python(3) main.py <CHTML file> [any optional parameters (see docs)]""")
     else:
-        output = ".".join(sys.argv[1].split(".")[:-2]) + ".html"
-        if "-o" in sys.argv:
-            output = sys.argv[sys.argv.index("-o") + 1]
-        elif "--output" in sys.argv:
-            output = sys.argv[sys.argv.index("--output") + 1]
-
-        if "-b" in sys.argv:
-            output = sys.argv[sys.argv.index("-b") + 1] + output
-        elif "--build-dir" in sys.argv:
-            output = sys.argv[sys.argv.index("-b") + 1] + output
-
-        try:
-            if(".c.html" not in sys.argv[1]):
-                print("WARNING: CHTML input file does not contain '.c.html' in its name; are you sure that it's the correct format?")
-            chtml = bs4.BeautifulSoup(open(sys.argv[1]), "html.parser")
-
-            # index all of the tags that we deal with
-            transcludes = chtml.find_all("link", rel="transclusion")
-            csslinks = chtml.find_all("link", rel="stylesheet")
-            scriptlinks = chtml.find_all("script", src=True)
-
-            for transclusion in transcludes:
-                try:
-                    transclusion.replaceWith(bs4.BeautifulSoup(open(transclusion["href"]), "html.parser"))
-                except IOError as e:
-                    print("Transclusion failure: file %s could not be found -- perhaps it's misspelt?" % transclusion["href"])
-                    del transclusion
-                except Exception as e:
-                    print("Transclusion failure:", e)
-
-            if "-v" in sys.argv or "--verbose" in sys.argv:
-                # they passed the verbose flag; embed script and css files
-
-                # css files
-                for cssfile in csslinks:
-                    # create a new <style> tag to contain embedded css
-                    csstag = chtml.new_tag("style")
-
-                    # fill the <style> tag with the css
-                    csstag.append(bs4.BeautifulSoup(open(cssfile["href"]), "html.parser"))
-
-                    # replace the link tag with the <style> tag
-                    cssfile.replaceWith(csstag)
-
-                # script files
-                for scriptfile in scriptlinks:
-                    # create a new <script> tag to contain embedded js
-                    scripttag = chtml.new_tag("script")
-
-                    # fill the <script> tag with the js
-                    scripttag.append(bs4.BeautifulSoup(open(scriptfile["src"]), "html.parser"))
-
-                    # replace the link tag with the <script> tag
-                    scriptfile.replaceWith(scripttag)
-
-            if minify:
-                chtml = htmlmin.minify(str(chtml), remove_empty_space=True, remove_comments=nocomm)
-
-                # TODO: if minify flag set, and -d (deep) flag is set, then also transclude JS and CSS files into the base HTML file. (we really don't like external references ;))
-
-            # save the new file
-            f = open(output, "w")
-            f.write(str(chtml))
-            f.close()
-            print("SUCCESS: Compiled to %s!" % output)
-        except IOError as e:
-            print("File %s could not be found -- are you sure you spelt it right?" % sys.argv[1])
-        except Exception as e:
-            print("Whoops, we couldn't compile the CHTML file. See error:", e)
+        files = []
+        if ".c.html" in sys.argv[1]:
+            files[0] = sys.argv[1]
+        else:
+            print("WARNING: CHTML input file does not contain '.c.html' in its name; are you sure that it's the correct format?")
+            # no .c.html;  user likely specified a directory to build
+            if os.path.isdir(sys.argv[1]):
+                # it is a dir; we should go through the files and compile them all.
+                for f in os.listdir(sys.argv[1]):
+                    if os.path.isfile(os.path.join(sys.argv[1], f)):
+                        files.append(os.path.join(sys.argv[1], f))
+        for f in files:
+            output = ".".join(f.split(".")[:-2]).split("/")[-1] + ".html"
+            if "-o" in sys.argv:
+                output = sys.argv[sys.argv.index("-o") + 1]
+            elif "--output" in sys.argv:
+                output = sys.argv[sys.argv.index("--output") + 1]
+
+            if "-b" in sys.argv:
+                output = sys.argv[sys.argv.index("-b") + 1] + "/" + output
+            elif "--build-dir" in sys.argv:
+                output = sys.argv[sys.argv.index("-b") + 1] + "/" + output
+
+            try:
+                chtml = bs4.BeautifulSoup(open(f), "html.parser")
+
+                # index all of the tags that we deal with
+                transcludes = chtml.find_all("link", rel="transclusion")
+                csslinks = chtml.find_all("link", rel="stylesheet")
+                scriptlinks = chtml.find_all("script", src=True)
+
+                for transclusion in transcludes:
+                    try:
+                        transclusion.replaceWith(bs4.BeautifulSoup(open(transclusion["href"]), "html.parser"))
+                    except IOError as e:
+                        print("Transclusion failure: file %s could not be found -- perhaps it's misspelt?" % transclusion["href"])
+                        del transclusion
+                    except Exception as e:
+                        print("Transclusion failure:", e)
+
+                if "-v" in sys.argv or "--verbose" in sys.argv:
+                    # they passed the verbose flag; embed script and css files
+
+                    # css files
+                    for cssfile in csslinks:
+                        # create a new <style> tag to contain embedded css
+                        csstag = chtml.new_tag("style")
+
+                        # fill the <style> tag with the css
+                        csstag.append(bs4.BeautifulSoup(open(cssfile["href"]), "html.parser"))
+
+                        # replace the link tag with the <style> tag
+                        cssfile.replaceWith(csstag)
+
+                    # script files
+                    for scriptfile in scriptlinks:
+                        # create a new <script> tag to contain embedded js
+                        scripttag = chtml.new_tag("script")
+
+                        # fill the <script> tag with the js
+                        scripttag.append(bs4.BeautifulSoup(open(scriptfile["src"]), "html.parser"))
+
+                        # replace the link tag with the <script> tag
+                        scriptfile.replaceWith(scripttag)
+
+                if minify:
+                    chtml = htmlmin.minify(str(chtml), remove_empty_space=True, remove_comments=nocomm)
+
+                    # TODO: if minify flag set, and -d (deep) flag is set, then also transclude JS and CSS files into the base HTML file. (we really don't like external references ;))
+
+                # save the new file
+                f = open(output, "w")
+                f.write(str(chtml))
+                f.close()
+                print("SUCCESS: Compiled to %s!" % output)
+            except IOError as e:
+                print("File %s could not be found -- are you sure you spelt it right?" % f)
+            except Exception as e:
+                print("Whoops, we couldn't compile the CHTML file. See error:", e)