asciidoc2html: Try to find asciidoc on the system.

Fixes #106.

scripts/asciidoc2html.py

@@ -32,29 +32,45 @@ sys.path.insert(0, os.path.join(os.path.dirname(__file__), os.pardir))
 from scripts import utils
 
 
-def call_asciidoc(src, dst):
+def _get_asciidoc_cmd(args):
+    """Try to find out what commandline to use to invoke asciidoc."""
+    if args.asciidoc is not None:
+        return args.asciidoc
+
+    try:
+        subprocess.call(['asciidoc'], stdout=subprocess.DEVNULL,
+                        stderr=subprocess.DEVNULL)
+    except OSError:
+        pass
+    else:
+        return ['asciidoc']
+
+    try:
+        subprocess.call(['asciidoc.py'], stdout=subprocess.DEVNULL,
+                        stderr=subprocess.DEVNULL)
+    except OSError:
+        pass
+    else:
+        return ['asciidoc.py']
+
+    raise FileNotFoundError
+
+
+def call_asciidoc(args, src, dst):
     """Call asciidoc for the given files.
 
     Args:
+        args: The asciidoc binary to use, as a list.
         src: The source .asciidoc file.
         dst: The destination .html file, or None to auto-guess.
     """
     print("Calling asciidoc for {}...".format(os.path.basename(src)))
-    if os.name == 'nt':
+    args = args[:]
-        # FIXME this is highly specific to my machine
-        # https://github.com/The-Compiler/qutebrowser/issues/106
-        args = [r'C:\Python27\python', r'J:\bin\asciidoc-8.6.9\asciidoc.py']
-    else:
-        args = ['asciidoc']
     if dst is not None:
         args += ['--out-file', dst]
     args.append(src)
     try:
         subprocess.check_call(args)
-    except FileNotFoundError:
-        utils.print_col("asciidoc needs to be installed to use this script!",
-                        'red')
-        sys.exit(1)
     except (subprocess.CalledProcessError, OSError) as e:
         utils.print_col(str(e), 'red')
         sys.exit(1)
@@ -67,6 +83,10 @@ def main(colors=False):
     parser = argparse.ArgumentParser()
     parser.add_argument('--all', help="Build all documentation into a given "
                         "directory.", nargs=1)
+    parser.add_argument('--asciidoc', help="Full path to python and "
+                        "asciidoc.py. If not given, it's searched in PATH.",
+                        nargs=2, required=False,
+                        metavar=('PYTHON', 'ASCIIDOC'))
     args = parser.parse_args()
     asciidoc_files = [
         ('doc/FAQ.asciidoc', 'qutebrowser/html/doc/FAQ.html'),
@@ -77,6 +97,13 @@ def main(colors=False):
         os.mkdir('qutebrowser/html/doc')
     except FileExistsError:
         pass
+    try:
+        asciidoc = _get_asciidoc_cmd(args)
+    except FileNotFoundError:
+        utils.print_col("Could not find asciidoc! Please install it, or use "
+                        "the --asciidoc argument to point this script to the "
+                        "correct python/asciidoc.py location!", 'red')
+        sys.exit(1)
     if args.all:
         for root, _dirs, files in os.walk(os.getcwd()):
             for filename in files:
@@ -92,14 +119,14 @@ def main(colors=False):
                                     'html')))
                 dst = os.path.join(*parts)
                 os.makedirs(os.path.dirname(dst), exist_ok=True)
-                call_asciidoc(src, dst)
+                call_asciidoc(asciidoc, src, dst)
     else:
         for src in glob.glob('doc/help/*.asciidoc'):
             name, _ext = os.path.splitext(os.path.basename(src))
             dst = 'qutebrowser/html/doc/{}.html'.format(name)
             asciidoc_files.append((src, dst))
         for src, dst in asciidoc_files:
-            call_asciidoc(src, dst)
+            call_asciidoc(asciidoc, src, dst)
 
 
 if __name__ == '__main__':