feat(aliases): add basic argument parsing (#10710)

plugins/aliases/README.md

@@ -17,6 +17,12 @@ Requirements: Python needs to be installed.
 
 - `acs`: show all aliases by group.
 
+- `acs -h/--help`: print help mesage.
+
 - `acs <keyword>`: filter aliases by `<keyword>` and highlight.
 
+- `acs -g <group>/--group <group`: show only aliases for group `<group>`. Multiple uses of the flag show all groups,
+
+- `acs --groups-only`: show only group names
+
   ![screenshot](https://cloud.githubusercontent.com/assets/3602957/11581913/cb54fb8a-9a82-11e5-846b-5a67f67ad9ad.png)

plugins/aliases/cheatsheet.py

@@ -2,6 +2,7 @@
 import sys
 import itertools
 import termcolor
+import argparse
 
 def parse(line):
     left = line[0:line.find('=')].strip()
@@ -26,7 +27,7 @@ def cheatsheet(lines):
         target_aliases.extend(group_list)
     return cheatsheet
 
-def pretty_print_group(key, aliases, highlight=None):
+def pretty_print_group(key, aliases, highlight=None, only_groupname=False):
     if len(aliases) == 0:
         return
     group_hl_formatter = lambda g, hl: termcolor.colored(hl, 'yellow').join([termcolor.colored(part, 'red') for part in ('[%s]' % g).split(hl)])
@@ -35,21 +36,33 @@ def pretty_print_group(key, aliases, highlight=None):
     alias_formatter = lambda alias: termcolor.colored('\t%s = %s' % alias[0:2], 'green')
     if highlight and len(highlight)>0:
         print (group_hl_formatter(key, highlight))
-        print ('\n'.join([alias_hl_formatter(alias, highlight) for alias in aliases]))
+        if not only_groupname:
+            print ('\n'.join([alias_hl_formatter(alias, highlight) for alias in aliases]))
     else:
         print (group_formatter(key))
-        print ('\n'.join([alias_formatter(alias) for alias in aliases]))
+        if not only_groupname:
+            print ('\n'.join([alias_formatter(alias) for alias in aliases]))
     print ('')
 
-def pretty_print(cheatsheet, wfilter):
+def pretty_print(cheatsheet, wfilter, group_list=None, groups_only=False):
     sorted_key = sorted(cheatsheet.keys())
     for key in sorted_key:
+        if group_list and key not in group_list:
+            continue
         aliases = cheatsheet.get(key)
         if not wfilter:
-            pretty_print_group(key, aliases, wfilter)
+            pretty_print_group(key, aliases, wfilter, groups_only)
         else:
             pretty_print_group(key, [ alias for alias in aliases if alias[0].find(wfilter)>-1 or alias[1].find(wfilter)>-1], wfilter)
 
 if __name__ == '__main__':
+    parser = argparse.ArgumentParser(description="Pretty print aliases.")
+    parser.add_argument('filter', nargs="*", help="search aliases matching string")
+    parser.add_argument('-g', '--group', dest="group_list", action='append', help="only print aliases in given groups")
+    parser.add_argument('--groups', dest='groups_only', action='store_true', help="only print alias groups")
+    args = parser.parse_args()
+
     lines = sys.stdin.readlines()
-    pretty_print(cheatsheet(lines), sys.argv[1] if len(sys.argv)>1 else None)
+    group_list = args.group_list or None
+    wfilter = " ".join(args.filter) or None
+    pretty_print(cheatsheet(lines), wfilter, group_list, args.groups_only)