jw.build.cmds: Move build.cmds -> cmds.projects

Reorganize the Python module structure. Placing the command classes
under jw.cmds.projects instead of jw.build.cmds will allow to add a
nested command structure, with the current commands, being mostly
related to building software, found below a "projects" toplevel
command.

Other conceivable commands could be "package" for packaging, or
"distro" for commands wrapping the distribution's package manager.

Signed-off-by: Jan Lindemann <jan@janware.com>

src/python/jw/pkg/cmds/projects/CmdModules.py

@@ -0,0 +1,42 @@
+# -*- coding: utf-8 -*-
+
+from argparse import Namespace, ArgumentParser
+
+from ..Cmd import Cmd
+
+class CmdModules(Cmd): # export
+
+    def __init__(self) -> None:
+        super().__init__('modules', help='Query existing janware packages')
+
+    def add_arguments(self, parser: ArgumentParser) -> None:
+        super().add_arguments(parser)
+        parser.add_argument('-F', '--filter', nargs='?', default=None, help='Key-value pairs, seperated by commas, to be searched for in project.conf')
+
+    def _run(self, args: Namespace) -> None:
+        import pathlib
+        proj_root = self.app.projs_root
+        self.app.debug("proj_root = " + proj_root)
+        path = pathlib.Path(self.app.projs_root)
+        modules = [p.parents[1].name for p in path.glob('*/make/project.conf')]
+        self.app.debug("modules = ", modules)
+        out = []
+        filters = None if args.filter is None else [re.split("=", f) for f in re.split(",", args.filter)]
+        for m in modules:
+            if filters:
+                for f in filters:
+                    path = f[0].rsplit('.')
+                    if len(path) > 1:
+                        sec = path[0]
+                        key = path[1]
+                    else:
+                        sec = None
+                        key = path[0]
+                    val = self.app.get_value(m, sec, key)
+                    self.app.debug('Checking in {} if {}="{}", is "{}"'.format(m, f[0], f[1], val))
+                    if val and val == f[1]:
+                        out.append(m)
+                        break
+            else:
+                out.append(m)
+        print(' '.join(out))