Add QMK Compile Context Sensitivity (#6884)

* Add context sensitive compile, without config check

* Initial full working state. Plan to refactor

* Refactor loop for simplicity, add comments

* Update docs/cli.md with qmk compile examples

* Simplify path for keyboard derivation

* Update path to use path.join instead of concat

* Refactor keyboard path, the skully way

* Add in keymap folder support

* Add /layouts compile support

* Update docs/cli.md with empty compile in layouts

* Add comments to compile.py

* Update docs for clarity, and fix compile error typo

* Fix config option compile

* Fix layout compile and failure mode

* Add rules.mk check

* Fix variable names for global config

* Add in_layout priority

* Remove default fallback in favor of throw, update docs

* Add keymap folder context

* Fix formatting

* Add os import

* Convert to create_make_command

* Fix Travis lint errors

* Remove blank line with whitespace

* Add blank lines for readability

* Remove unnecessary config logic

* Update Docs to add flash

Co-Authored-By: skullydazed <skullydazed@users.noreply.github.com>

* Shift config precedence to MILC

Co-authored-by: skullydazed <skullydazed@users.noreply.github.com>

lib/python/qmk/cli/compile.py

@@ -3,6 +3,7 @@
 You can compile a keymap already in the repo or using a QMK Configurator export.
 """
 import subprocess
+import os
 from argparse import FileType
 
 from milc import cli
@@ -28,6 +29,46 @@ def compile(cli):
     If --keyboard and --keymap are provided this command will build a firmware based on that.
 
     """
+    # Set CWD as directory command was issued from
+    cwd = os.environ['ORIG_CWD']
+    qmk_path = os.getcwd()
+    current_folder = os.path.basename(cwd)
+    # Initialize boolean to check for being in a keyboard directory and initialize keyboard string
+    in_keyboard = False
+    in_layout = False
+    keyboard = ""
+    keymap = ""
+    user_keymap = ""
+    user_keyboard = ""
+
+    # Set path for '/keyboards/' directory
+    keyboards_path = os.path.join(qmk_path, "keyboards")
+    layouts_path = os.path.join(qmk_path, "layouts")
+
+    # If below 'keyboards' and not in 'keyboards' or 'keymaps', get current keyboard name
+    if cwd.startswith(keyboards_path):
+        if current_folder != "keyboards" and current_folder != "keymaps":
+            if os.path.basename(os.path.abspath(os.path.join(cwd, ".."))) == "keymaps":
+                # If in a keymap folder, set relative path, get everything before /keymaps, and the keymap name
+                relative_path = cwd[len(keyboards_path):][1:]
+                keyboard = str(relative_path).split("/keymaps", 1)[0]
+                keymap = str(relative_path.rsplit("/", 1)[-1])
+            else:
+                keyboard = str(cwd[len(keyboards_path):])[1:]
+
+            in_keyboard = True
+
+    # If in layouts dir
+    if cwd.startswith(layouts_path):
+        if current_folder != "layouts":
+            in_layout = True
+
+    # If user keyboard/keymap or compile keyboard/keymap are supplied, assign those
+    if cli.config.compile.keyboard:
+        user_keyboard = cli.config.compile.keyboard
+    if cli.config.compile.keymap and not in_layout:
+        user_keymap = cli.config.compile.keymap
+
     if cli.args.filename:
         # Parse the configurator json
         user_keymap = parse_configurator_json(cli.args.filename)
@@ -41,12 +82,40 @@ def compile(cli):
 
         cli.log.info('Wrote keymap to {fg_cyan}%s/%s/keymap.c', keymap_path, user_keymap['keymap'])
 
-    elif cli.config.compile.keyboard and cli.config.compile.keymap:
+    elif user_keyboard and user_keymap:
         # Generate the make command for a specific keyboard/keymap.
-        command = create_make_command(cli.config.compile.keyboard, cli.config.compile.keymap)
+        command = create_make_command(user_keyboard, user_keymap)
+
+    elif in_keyboard:
+        keyboard = user_keyboard if user_keyboard else keyboard
+        keymap = user_keymap if user_keymap else keymap
+
+        if not os.path.exists(os.path.join(keyboards_path, keyboard, "rules.mk")):
+            cli.log.error('This directory does not contain a rules.mk file. Change directory or supply --keyboard with optional --keymap')
+            return False
+
+        # Get path for keyboard directory
+        keymap_path = qmk.path.keymap(keyboard)
+
+        # Check for global keymap config first
+        if keymap:
+            command = create_make_command(keyboard, keymap)
+
+        else:
+            # If no default keymap exists and none provided
+            cli.log.error('This directory does not contain a keymap. Set one with `qmk config` or supply `--keymap` ')
+            return False
+
+    elif in_layout:
+        if user_keyboard:
+            keymap = current_folder
+            command = create_make_command(user_keyboard, keymap)
+        else:
+            cli.log.error('You must supply a keyboard to compile a layout keymap. Set one with `qmk config` or supply `--keyboard` ')
+            return False
 
     else:
-        cli.log.error('You must supply a configurator export or both `--keyboard` and `--keymap`.')
+        cli.log.error('You must supply a configurator export, both `--keyboard` and `--keymap`, or be in a directory for a keyboard or keymap.')
         return False
 
     cli.log.info('Compiling keymap with {fg_cyan}%s\n\n', ' '.join(command))