app: more versatile initialization for path in config

in case a manifest file is contained into some sub directories,
the command to init a workspace locally should be
```
west init -l sub1/sub2 --mf west.yml
```

but in that case, the west top dir is going to be into `sub1`
which is an issue.

one workaround is to use:
```
west init -l sub1 --mf sub2/west.yml
```

but in that case, the config is initialized incorrectly:
`manifest.path` contains only `sub1` and `manifest.file` is `sub2/west.yml`.

`manifest.path` should contain a path, even if `--mf` is a relative path.
`manifest.file` should only contain the filename.

this change allows any usage so that the workspace top dir is created next to `sub1`
and the manifest repo can be located into nested directories

src/west/app/project.py

@@ -23,9 +23,6 @@
 from west import util
 from west.commands import CommandError, Verbosity, WestCommand
 from west.configuration import Configuration
-from west.manifest import MANIFEST_REV_BRANCH as MANIFEST_REV
-from west.manifest import QUAL_MANIFEST_REV_BRANCH as QUAL_MANIFEST_REV
-from west.manifest import QUAL_REFS_WEST as QUAL_REFS
 from west.manifest import (
     ImportFlag,
     Manifest,
@@ -34,8 +31,12 @@
     Submodule,
     _manifest_content_at,
 )
+from west.manifest import MANIFEST_REV_BRANCH as MANIFEST_REV
+from west.manifest import QUAL_MANIFEST_REV_BRANCH as QUAL_MANIFEST_REV
+from west.manifest import QUAL_REFS_WEST as QUAL_REFS
 from west.manifest import is_group as is_project_group
 
+
 #
 # Project-related or multi-repo commands, like "init", "update",
 # "diff", etc.
@@ -73,7 +74,7 @@ def _projects(self, ids, only_cloned=False):
             return self.manifest.get_projects(ids, only_cloned=only_cloned)
         except ValueError as ve:
             if len(ve.args) != 2:
-                raise          # not directly raised by get_projects()
+                raise  # not directly raised by get_projects()
 
             # Die with an error message on unknown or uncloned projects.
             unknown, uncloned = ve.args
@@ -143,6 +144,7 @@ def has_output():
 
         return has_output()
 
+
 class Init(_ProjectCommand):
 
     def __init__(self):
@@ -204,13 +206,13 @@ def do_add_parser(self, parser_adder):
                             help='''manifest repository branch or tag name
                             to check out first; cannot be combined with -l''')
         parser.add_argument('--mf', '--manifest-file', dest='manifest_file',
-                            help='manifest file name to use')
+                            help='manifest file name to use, relative to "directory"')
         parser.add_argument('-l', '--local', action='store_true',
-                            help='''use "directory" as an existing local
-                            manifest repository instead of cloning one from
-                            MANIFEST_URL; .west is created next to "directory"
-                            in this case, and manifest.path points at
-                            "directory"''')
+                            help='''use "directory" to create the workspace
+                            from a local manifest directory, instead of cloning 
+                            one from MANIFEST_URL; .west is created next to 
+                            "directory" in this case, and manifest.path points at
+                            the manifest file location.''')
         parser.add_argument('--rename-delay', type=int,
                             help='''Number of seconds to wait before renaming
                             some temporary directories. Some filesystems like NTFS
@@ -273,7 +275,7 @@ def local(self, args) -> Path:
         manifest_filename = args.manifest_file or 'west.yml'
         manifest_file = manifest_dir / manifest_filename
         topdir = manifest_dir.parent
-        rel_manifest = manifest_dir.name
+        rel_manifest = manifest_file.parent.relative_to(manifest_dir.parent)
         west_dir = topdir / WEST_DIR
 
         if not manifest_file.is_file():
@@ -287,7 +289,7 @@ def local(self, args) -> Path:
         os.chdir(topdir)
         self.config = Configuration(topdir=topdir)
         self.config.set('manifest.path', os.fspath(rel_manifest))
-        self.config.set('manifest.file', manifest_filename)
+        self.config.set('manifest.file', manifest_file.name)
 
         return topdir
 
@@ -412,6 +414,7 @@ def create(self, directory: Path, exist_ok: bool = True) -> None:
         except Exception as e:
             self.die(f"Can't create {directory}: {e}")
 
+
 class List(_ProjectCommand):
     def __init__(self):
         super().__init__(
@@ -554,6 +557,7 @@ def delay(func, project):
 
             self.inf(result, colorize=False)
 
+
 class ManifestCommand(_ProjectCommand):
     # The slightly weird naming is to avoid a conflict with
     # west.manifest.Manifest.
@@ -617,7 +621,7 @@ def do_run(self, args, user_args):
                        'sort_keys': False}
 
         if args.validate:
-            pass              # nothing more to do
+            pass  # nothing more to do
         elif args.resolve:
             self._die_if_manifest_project_filter('resolve')
             self._dump(args, manifest.as_yaml(**dump_kwargs))
@@ -647,6 +651,7 @@ def _dump(self, args, to_dump):
         else:
             sys.stdout.write(to_dump)
 
+
 class Compare(_ProjectCommand):
     def __init__(self):
         super().__init__(
@@ -809,6 +814,7 @@ def print_status(self, project):
         self.small_banner('status:')
         self.inf(textwrap.indent(cp.stdout.decode().rstrip(), ' ' * 4))
 
+
 class Diff(_ProjectCommand):
     def __init__(self):
         super().__init__(
@@ -841,7 +847,7 @@ def do_run(self, args, user_args):
         color = ['--color=always'] if self.color_ui else []
         for project in self._cloned_projects(args, only_active=not args.all):
             diff_commit = (
-                ['manifest-rev'] # see #719 and #747
+                ['manifest-rev']  # see #719 and #747
                 # Special-case the manifest repository while it's
                 # still showing up in the 'projects' list. Yet
                 # more evidence we should tackle #327.
@@ -875,6 +881,7 @@ def do_run(self, args, user_args):
         elif self.verbosity <= Verbosity.INF:
             self.inf(f"Empty diff in {no_diff} projects.")
 
+
 class Status(_ProjectCommand):
     def __init__(self):
         super().__init__(
@@ -924,6 +931,7 @@ def do_run(self, args, user_args):
                 failed.append(project)
         self._handle_failed(args, failed)
 
+
 class Update(_ProjectCommand):
 
     def __init__(self):
@@ -1238,7 +1246,7 @@ def update_submodules(self, project):
                     project.git(['submodule', 'sync', '--recursive'])
                 project.git(config_opts +
                             ['submodule', 'update', '--init',
-                                submodules_update_strategy, '--recursive'])
+                             submodules_update_strategy, '--recursive'])
                 return
             else:
                 # Cache used so convert to a list so that --reference can be used.
@@ -1265,8 +1273,8 @@ def update_submodules(self, project):
                         level=Verbosity.DBG_MORE)
             project.git(config_opts +
                         ['submodule', 'update',
-                            '--init', submodules_update_strategy,
-                            '--recursive'] + ref + [submodule.path])
+                         '--init', submodules_update_strategy,
+                         '--recursive'] + ref + [submodule.path])
 
     def update(self, project):
         if self.args.stats:
@@ -1658,6 +1666,7 @@ def decide_update_strategy(self, project, sha, stats, take_stats):
     def project_is_active(self, project):
         return self.manifest.is_active(project, extra_filter=self.group_filter)
 
+
 class ForAll(_ProjectCommand):
     def __init__(self):
         super().__init__(
@@ -1737,6 +1746,7 @@ def do_run(self, args, user_args):
                 failed.append(project)
         self._handle_failed(args, failed)
 
+
 GREP_EPILOG = '''
 EXAMPLES
 --------
@@ -1835,11 +1845,12 @@ def do_run(self, args, user_args):
 
   west config grep.color never
 '''
+
+
 # color.ui limitation:
 # https://github.com/zephyrproject-rtos/west/issues/651
 
 class Grep(_ProjectCommand):
-
     # When adding a tool, make sure to check:
     #
     # - the 'failed' handling below for proper exit codes
@@ -1978,6 +1989,7 @@ def tool_args(self, tool, cmdline_args):
 
         return ret
 
+
 class Topdir(_ProjectCommand):
     def __init__(self):
         super().__init__(
@@ -1996,6 +2008,7 @@ def do_add_parser(self, parser_adder):
     def do_run(self, args, user_args):
         self.inf(PurePath(self.topdir).as_posix())
 
+
 class SelfUpdate(_ProjectCommand):
     def __init__(self):
         super().__init__(
@@ -2009,6 +2022,7 @@ def do_add_parser(self, parser_adder):
     def do_run(self, args, user_args):
         self.die(self.description)
 
+
 #
 # Private helper routines.
 #
@@ -2027,11 +2041,13 @@ def _clean_west_refspace(project):
         delete_ref_cmd = ['update-ref', '-d', ref]
         project.git(delete_ref_cmd)
 
+
 def _update_manifest_rev(project, new_manifest_rev):
     project.git(['update-ref',
                  '-m', f'west update: moving to {new_manifest_rev}',
                  QUAL_MANIFEST_REV, new_manifest_rev])
 
+
 def _maybe_sha(rev):
     # Return true if and only if the given revision might be a SHA.
 
@@ -2042,6 +2058,7 @@ def _maybe_sha(rev):
 
     return len(rev) <= 40
 
+
 def _rev_type(project, rev=None):
     # Returns a "refined" revision type of rev (default:
     # project.revision) as one of the following strings: 'tag', 'tree',
@@ -2067,7 +2084,7 @@ def _rev_type(project, rev=None):
         return 'other'
     elif stdout in ('blob', 'tree', 'tag'):
         return stdout
-    elif stdout != 'commit':    # just future-proofing
+    elif stdout != 'commit':  # just future-proofing
         return 'other'
 
     # to tell branches, lightweight tags, and commits apart, we need rev-parse.
@@ -2095,6 +2112,7 @@ def _rev_type(project, rev=None):
     else:
         return 'other'
 
+
 def _head_ok(project):
     # Returns True if the reference 'HEAD' exists and is not a tag or remote
     # ref (e.g. refs/remotes/origin/HEAD).
@@ -2110,6 +2128,7 @@ def _head_ok(project):
     return project.git('show-ref --quiet --head /',
                        check=False).returncode == 0
 
+
 def projects_unknown(manifest, projects):
     # Retrieve the projects with get_projects(project,
     # only_cloned=False). Return a pair: (projects, unknown)
@@ -2120,12 +2139,13 @@ def projects_unknown(manifest, projects):
         return (manifest.get_projects(projects, only_cloned=False), None)
     except ValueError as ve:
         if len(ve.args) != 2:
-            raise          # not directly raised by get_projects()
+            raise  # not directly raised by get_projects()
         unknown = ve.args[0]
         if not unknown:
-            raise   # only_cloned is False, so this "can't happen"
+            raise  # only_cloned is False, so this "can't happen"
         return (None, unknown)
 
+
 #
 # Special files and directories in the west workspace.
 #
@@ -2163,6 +2183,7 @@ def projects_unknown(manifest, projects):
 Regardless of the above, output is limited to cloned projects.
 '''
 
+
 #
 # Helper class for creating format string keys that are expensive or
 # undesirable to compute if not needed.
@@ -2190,6 +2211,7 @@ def __format__(self, format_spec):
                 self.as_str = str(self.obj)
         return ('{:' + format_spec + '}').format(self.as_str)
 
+
 #
 # Logging helpers
 #