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/CmdGetAuthInfo.py

@@ -0,0 +1,55 @@
+# -*- coding: utf-8 -*-
+
+import re, os
+from argparse import Namespace, ArgumentParser
+from urllib.parse import urlparse
+
+from ..Cmd import Cmd
+from ...lib.util import run_cmd
+
+class CmdGetAuthInfo(Cmd): # export
+
+    def __init__(self) -> None:
+        super().__init__('get-auth-info', help='Try to retrieve authentication information from the source tree')
+
+    def add_arguments(self, parser: ArgumentParser) -> None:
+        super().add_arguments(parser)
+        parser.add_argument('--only-values', help='Don\'t prefix values by "<field-name>="', action='store_true', default=False)
+        parser.add_argument('--username', help='Show user name', action='store_true', default=False)
+        parser.add_argument('--password', help='Show password', action='store_true', default=False)
+        parser.add_argument('--remote-base', help='Show remote base URL', action='store_true', default=False)
+
+    def _run(self, args: Namespace) -> None:
+        keys = ['username', 'password']
+
+        # --- Milk jw-pkg repo
+        jw_pkg_dir = self.app.proj_dir('jw-pkg')
+        if not os.path.isdir(jw_pkg_dir + '/.git'):
+            self.app.debug(f'jw-pkg directory is not a Git repo: {jw_pkg_dir}')
+            return
+        remotes = run_cmd(['git', '-C', jw_pkg_dir, 'remote', '-v'])
+        result: dict[str, str] = {}
+        for line in remotes.split('\n'):
+            if re.match(r'^\s*$', line):
+                continue
+            name, url, typ = re.split(r'\s+', line)
+            if name == 'origin' and typ == '(pull)': # TODO: Use other remotes, too?
+                parsed = urlparse(url)
+                for key in keys:
+                    result[key] = getattr(parsed, key)
+                base = parsed.geturl()
+                base = re.sub(r'/jw-pkg', '', base)
+                base = re.sub(r'/proj$', '', base)
+                url['remote-base'] = base
+                break
+
+        # --- Print results
+        for key, val in result.items():
+            if getattr(args, key, None) != True:
+                continue
+            if val is None:
+                continue
+            if args.only_values:
+                print(val)
+                continue
+            print(f'{key}="{val}"')