X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=youtube_dl%2Futils.py;h=73fe1ad0a3a27165d3dffc61927733beb9c5ed33;hb=7ee40b5d1cf0d4e79a049f3851262378c08d9e4c;hp=0b0d1eb9000ae4875ce64cb10f8a5271b6abacb2;hpb=79f82953039f832576f6d0202c7bbeaa2fd390c0;p=youtube-dl

diff --git a/youtube_dl/utils.py b/youtube_dl/utils.py
index 0b0d1eb90..73fe1ad0a 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):
@@ -1142,3 +1151,13 @@ 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