bin/hostinfo: add support for --hosts and --short

You could now use --hosts to get a listing of all available hosts
with in the current basepath (set by HOSTINFO_PATH or --path or the
default value /usr/local/share/hostinfo/). If you use --short you
will remove the domain spline.inf.fu-berlin.de from the output and
you will get only the hostnames.

1 files changed, 27 insertions, 3 deletions

diff --git a/bin/hostinfo b/bin/hostinfo
index 8876c54..43fd5b4 100755
--- a/bin/hostinfo
+++ b/bin/hostinfo
@@ -44,6 +44,21 @@ def print_keys(path):
     data = _get_data(path)
     _print_keys(data)
 
+def print_hosts(path, short):
+    metadata = os.path.join(path, 'metadata', 'hosts')
+    if os.path.exists(metadata):
+        hosts = yaml.load(file(metadata, 'r'))
+        if 'hosts' in hosts:
+            for host in hosts['hosts']:
+                if short:
+                    print(host.replace('.spline.inf.fu-berlin.de',''))
+                else:
+                    print(host)
+            return True
+
+    sys.stderr.write("'%s' not found!\n" % metadata)
+    return False
+
 def find_host(basepath, host):
     path = os.path.join(basepath, host)
     if os.path.exists(path):
@@ -77,11 +92,13 @@ def main():
     if 'HOSTINFO_PATH' in os.environ:
         basepath = os.environ['HOSTINFO_PATH']
 
-    file = oneline = keys = verbose = nospaces = help = False
+    file = oneline = keys = verbose = nospaces = help = \
+        hosts = short = False
     try:
-        optlist, args = getopt.gnu_getopt(sys.argv, 'ofkvnh?p:',
+        optlist, args = getopt.gnu_getopt(sys.argv, 'ofkvnh?p:ls',
                                           ['oneline', 'file', 'keys', 'verbose',
-                                           'nospaces', 'help', 'path='])
+                                           'nospaces', 'help', 'path=', 'hosts',
+                                           'short'])
         opts = {}
         for key, value in optlist:
             opts[key] = value
@@ -92,6 +109,8 @@ def main():
         verbose = any([o in opts for o in ['--verbose', '-v']])
         nospaces = any([o in opts for o in ['--nospaces', '-n']])
         help = any([o in opts for o in ['--help', '-h', '-?']])
+        hosts = any([o in opts for o in ['--hosts', '-l']])
+        short = any([o in opts for o in ['--short', '-s']])
 
         if any([o in opts for o in ['--path', '-p']]):
             basepath = [opts[o] for o in ['--path', '-p'] if o in opts][0]
@@ -100,6 +119,11 @@ def main():
         print
         args = []
 
+    if hosts:
+        if not print_hosts(basepath, short):
+            sys.exit(1)
+        sys.exit(0)
+
     if help or len(args) < 1:
         print_help(self_name)
         if not help: