From f254781274f35c485befb4f6acedb8fb8d1f797b Mon Sep 17 00:00:00 2001
From: Aaron Bentley <abentley@panoramicfeedback.com>
Date: Fri, 11 Mar 2005 19:17:17 +0000
Subject: Implemented plugin system for viewing commands

---
 be                     | 11 +++++++++--
 becommands/close.py    |  1 +
 becommands/list.py     |  1 +
 becommands/new.py      |  1 +
 becommands/open.py     |  1 +
 becommands/set_root.py |  1 +
 becommands/show.py     |  1 +
 libbe/cmdutil.py       |  9 +++++++++
 libbe/plugin.py        | 25 +++++++++++++++++++++++++
 9 files changed, 49 insertions(+), 2 deletions(-)
 create mode 100644 libbe/plugin.py

diff --git a/be b/be
index 3aa8d38..3c6c36d 100755
--- a/be
+++ b/be
@@ -1,7 +1,7 @@
 #!/usr/bin/env python
 from libbe.cmdutil import *
 from libbe.bugdir import tree_root, create_bug_dir
-from libbe import names
+from libbe import names, plugin, cmdutil
 import sys
 import os
 import becommands.severity
@@ -29,7 +29,14 @@ Unimplemented becommands
 
 
 if len(sys.argv) == 1:
-    print __doc__
+    cmdlist = []
+    print """Bugs Everywhere - Distributed bug tracking
+    
+Supported commands"""
+    for name, module in cmdutil.iter_commands():
+        cmdlist.append((name, module.__doc__))
+    for name, desc in cmdlist:
+        print "%s: %s" % (name, desc)
 else:
     try:
         try:
diff --git a/becommands/close.py b/becommands/close.py
index 184e2e1..11c5c74 100644
--- a/becommands/close.py
+++ b/becommands/close.py
@@ -1,3 +1,4 @@
+"""Close a bug"""
 from libbe import cmdutil
 def execute(args):
     assert(len(args) == 1)
diff --git a/becommands/list.py b/becommands/list.py
index b608629..d4b9142 100644
--- a/becommands/list.py
+++ b/becommands/list.py
@@ -1,3 +1,4 @@
+"""List bugs"""
 from libbe import bugdir, cmdutil
 import os
 def execute(args):
diff --git a/becommands/new.py b/becommands/new.py
index 2e78524..284f730 100644
--- a/becommands/new.py
+++ b/becommands/new.py
@@ -1,3 +1,4 @@
+"""Create a new bug"""
 from libbe import bugdir, cmdutil, names
 def execute(args):
     if len(args) != 1:
diff --git a/becommands/open.py b/becommands/open.py
index db89035..e6ff51e 100644
--- a/becommands/open.py
+++ b/becommands/open.py
@@ -1,3 +1,4 @@
+"""Re-open a bug"""
 from libbe import cmdutil
 def execute(args):
     assert(len(args) == 1)
diff --git a/becommands/set_root.py b/becommands/set_root.py
index bf1d495..0775da3 100644
--- a/becommands/set_root.py
+++ b/becommands/set_root.py
@@ -1,3 +1,4 @@
+"""Assign the root directory for bug tracking"""
 from libbe import bugdir, cmdutil
 
 def execute(args):
diff --git a/becommands/show.py b/becommands/show.py
index 8b38386..cd74eae 100644
--- a/becommands/show.py
+++ b/becommands/show.py
@@ -1,3 +1,4 @@
+"""Show a particular bug"""
 from libbe import bugdir, cmdutil
 import os
 
diff --git a/libbe/cmdutil.py b/libbe/cmdutil.py
index 2afd53c..77f0dfb 100644
--- a/libbe/cmdutil.py
+++ b/libbe/cmdutil.py
@@ -1,4 +1,5 @@
 import bugdir
+import plugin
 def unique_name(bug, bugs):
     chars = 1
     for some_bug in bugs:
@@ -49,3 +50,11 @@ def bug_summary(bug, bugs):
             (unique_name(bug, bugs), bug.severity, target, bug.creator,
              bug.summary)
 
+def iter_commands():
+    return plugin.iter_plugins("becommands")
+
+def execute(cmd, args):
+    return plugin.get_plugin("becommands", cmd).execute(args)
+
+def help(cmd, args):
+    return plugin.get_plugin("becommands", cmd).help()
diff --git a/libbe/plugin.py b/libbe/plugin.py
new file mode 100644
index 0000000..2dedac4
--- /dev/null
+++ b/libbe/plugin.py
@@ -0,0 +1,25 @@
+import os
+import os.path
+import sys
+def my_import(mod_name):
+    module = __import__(mod_name)
+    components = mod_name.split('.')
+    for comp in components[1:]:
+        module = getattr(module, comp)
+    return module
+
+def iter_plugins(prefix):
+    modfiles = os.listdir(os.path.join(sys.path[0], prefix))
+    modfiles.sort()
+    for modfile in modfiles:
+        if modfile.endswith(".py") and modfile != "__init__.py":
+            yield modfile[:-3], my_import(prefix+"."+modfile[:-3])
+
+
+def get_plugin(prefix, name):
+    dirprefix = '/'.join(prefix.split('.'))
+    command_path = os.path.join(sys.path[0], dirprefix, name+".py")
+    if os.path.isfile(command_path):
+        return my_import(prefix + "." + name)
+    return None
+ 
-- 
cgit