X-Git-Url: http://git.cielonegro.org/gitweb.cgi?a=blobdiff_plain;f=youtube_dl%2Futils.py;h=70f28414981111d63fb74c00f3ea554702042ea7;hb=94a23d2a1ed94af8bb80898194f03c38a5dcdb1d;hp=918a127cae014377a3b463c810930be1f07a937f;hpb=5d73273f6f458970b34b3c6f4c8bd18fbad9c1ca;p=youtube-dl.git

diff --git a/youtube_dl/utils.py b/youtube_dl/utils.py
index 918a127ca..70f284149 100644
--- a/youtube_dl/utils.py
+++ b/youtube_dl/utils.py
@@ -818,6 +818,15 @@ def date_from_str(date_str):
         return today + delta
     return datetime.datetime.strptime(date_str, "%Y%m%d").date()
     
+def hyphenate_date(date_str):
+    """
+    Convert a date in 'YYYYMMDD' format to 'YYYY-MM-DD' format"""
+    match = re.match(r'^(\d\d\d\d)(\d\d)(\d\d)$', date_str)
+    if match is not None:
+        return '-'.join(match.groups())
+    else:
+        return date_str
+
 class DateRange(object):
     """Represents a time interval between two dates"""
     def __init__(self, start=None, end=None):
@@ -1027,9 +1036,9 @@ def smuggle_url(url, data):
     return url + u'#' + sdata
 
 
-def unsmuggle_url(smug_url):
+def unsmuggle_url(smug_url, default=None):
     if not '#__youtubedl_smuggle' in smug_url:
-        return smug_url, None
+        return smug_url, default
     url, _, sdata = smug_url.rpartition(u'#')
     jsond = compat_parse_qs(sdata)[u'__youtubedl_smuggle'][0]
     data = json.loads(jsond)
@@ -1083,9 +1092,12 @@ def month_by_name(name):
         return None
 
 
-def fix_xml_all_ampersand(xml_str):
+def fix_xml_ampersands(xml_str):
     """Replace all the '&' by '&' in XML"""
-    return xml_str.replace(u'&', u'&')
+    return re.sub(
+        r'&(?!amp;|lt;|gt;|apos;|quot;|#x[0-9a-fA-F]{,4};|#[0-9]{,4};)',
+        u'&',
+        xml_str)
 
 
 def setproctitle(title):
@@ -1142,3 +1154,13 @@ def parse_duration(s):
 def prepend_extension(filename, ext):
     name, real_ext = os.path.splitext(filename) 
     return u'{0}.{1}{2}'.format(name, ext, real_ext)
+
+
+def check_executable(exe, args=[]):
+    """ Checks if the given binary is installed somewhere in PATH, and returns its name.
+    args can be a list of arguments for a short output (like -version) """
+    try:
+        subprocess.Popen([exe] + args, stdout=subprocess.PIPE, stderr=subprocess.PIPE).communicate()
+    except OSError:
+        return False
+    return exe