3 files changed, 89 insertions, 1 deletions
diff --git a/lib/python/qmk/cli/__init__.py b/lib/python/qmk/cli/__init__.py
index cfb6e6ea59..e7a5d5cd84 100644
--- a/lib/python/qmk/cli/__init__.py
+++ b/lib/python/qmk/cli/__init__.py
@@ -25,6 +25,7 @@ from . import json2c
 from . import lint
 from . import list
 from . import kle2json
+from . import multibuild
 from . import new
 from . import pyformat
 from . import pytest
diff --git a/lib/python/qmk/cli/info.py b/lib/python/qmk/cli/info.py
index 6115e8f87d..0d08d242cd 100755
--- a/lib/python/qmk/cli/info.py
+++ b/lib/python/qmk/cli/info.py
@@ -10,7 +10,7 @@ from milc import cli
 from qmk.json_encoders import InfoJSONEncoder
 from qmk.constants import COL_LETTERS, ROW_LETTERS
 from qmk.decorators import automagic_keyboard, automagic_keymap
-from qmk.keyboard import keyboard_completer, keyboard_folder, render_layouts, render_layout
+from qmk.keyboard import keyboard_completer, keyboard_folder, render_layouts, render_layout, rules_mk
 from qmk.keymap import locate_keymap
 from qmk.info import info_json
 from qmk.path import is_keyboard
@@ -124,12 +124,20 @@ def print_text_output(kb_info_json):
         show_keymap(kb_info_json, False)
 
 
+def print_parsed_rules_mk(keyboard_name):
+    rules = rules_mk(keyboard_name)
+    for k in sorted(rules.keys()):
+        print('%s = %s' % (k, rules[k]))
+    return
+
+
 @cli.argument('-kb', '--keyboard', type=keyboard_folder, completer=keyboard_completer, help='Keyboard to show info for.')
 @cli.argument('-km', '--keymap', help='Show the layers for a JSON keymap too.')
 @cli.argument('-l', '--layouts', action='store_true', help='Render the layouts.')
 @cli.argument('-m', '--matrix', action='store_true', help='Render the layouts with matrix information.')
 @cli.argument('-f', '--format', default='friendly', arg_only=True, help='Format to display the data in (friendly, text, json) (Default: friendly).')
 @cli.argument('--ascii', action='store_true', default=not UNICODE_SUPPORT, help='Render layout box drawings in ASCII only.')
+@cli.argument('-r', '--rules-mk', action='store_true', help='Render the parsed values of the keyboard\'s rules.mk file.')
 @cli.subcommand('Keyboard information.')
 @automagic_keyboard
 @automagic_keymap
@@ -146,6 +154,10 @@ def info(cli):
         cli.log.error('Invalid keyboard: "%s"', cli.config.info.keyboard)
         return False
 
+    if bool(cli.args.rules_mk):
+        print_parsed_rules_mk(cli.config.info.keyboard)
+        return False
+
     # Build the info.json file
     kb_info_json = info_json(cli.config.info.keyboard)
 
diff --git a/lib/python/qmk/cli/multibuild.py b/lib/python/qmk/cli/multibuild.py
new file mode 100755
index 0000000000..1f3a097704
--- /dev/null
+++ b/lib/python/qmk/cli/multibuild.py
@@ -0,0 +1,75 @@
+"""Compile all keyboards.
+
+This will compile everything in parallel, for testing purposes.
+"""
+import re
+from pathlib import Path
+
+from milc import cli
+
+from qmk.constants import QMK_FIRMWARE
+from qmk.commands import _find_make
+import qmk.keyboard
+
+
+def _make_rules_mk_filter(key, value):
+    def _rules_mk_filter(keyboard_name):
+        rules_mk = qmk.keyboard.rules_mk(keyboard_name)
+        return True if key in rules_mk and rules_mk[key].lower() == str(value).lower() else False
+    return _rules_mk_filter
+
+
+def _is_split(keyboard_name):
+    rules_mk = qmk.keyboard.rules_mk(keyboard_name)
+    return True if 'SPLIT_KEYBOARD' in rules_mk and rules_mk['SPLIT_KEYBOARD'].lower() == 'yes' else False
+
+
+@cli.argument('-j', '--parallel', type=int, default=1, help="Set the number of parallel make jobs to run.")
+@cli.argument('-c', '--clean', arg_only=True, action='store_true', help="Remove object files before compiling.")
+@cli.argument('-f', '--filter', arg_only=True, action='append', default=[], help="Filter the list of keyboards based on the supplied value in rules.mk. Supported format is 'SPLIT_KEYBOARD=yes'. May be passed multiple times.")
+@cli.subcommand('Compile QMK Firmware for all keyboards.', hidden=False if cli.config.user.developer else True)
+def multibuild(cli):
+    """Compile QMK Firmware against all keyboards.
+    """
+
+    make_cmd = _find_make()
+    if cli.args.clean:
+        cli.run([make_cmd, 'clean'], capture_output=False, text=False)
+
+    builddir = Path(QMK_FIRMWARE) / '.build'
+    makefile = builddir / 'parallel_kb_builds.mk'
+
+    keyboard_list = qmk.keyboard.list_keyboards()
+
+    filter_re = re.compile(r'^(?P<key>[A-Z0-9_]+)\s*=\s*(?P<value>[^#]+)$')
+    for filter_txt in cli.args.filter:
+        f = filter_re.match(filter_txt)
+        if f is not None:
+            keyboard_list = filter(_make_rules_mk_filter(f.group('key'), f.group('value')), keyboard_list)
+
+    keyboard_list = list(sorted(keyboard_list))
+
+    if len(keyboard_list) == 0:
+        return
+
+    builddir.mkdir(parents=True, exist_ok=True)
+    with open(makefile, "w") as f:
+        for keyboard_name in keyboard_list:
+            keyboard_safe = keyboard_name.replace('/', '_')
+            f.write(
+                f"""\
+all: {keyboard_safe}_binary
+{keyboard_safe}_binary:
+	@rm -f "{QMK_FIRMWARE}/.build/failed.log.{keyboard_safe}" || true
+	+@$(MAKE) -C "{QMK_FIRMWARE}" -f "{QMK_FIRMWARE}/build_keyboard.mk" KEYBOARD="{keyboard_name}" KEYMAP="default" REQUIRE_PLATFORM_KEY= COLOR=true SILENT=false \\
+		>>"{QMK_FIRMWARE}/.build/build.log.{keyboard_safe}" 2>&1 \\
+		|| cp "{QMK_FIRMWARE}/.build/build.log.{keyboard_safe}" "{QMK_FIRMWARE}/.build/failed.log.{keyboard_safe}"
+	@{{ grep '\[ERRORS\]' "{QMK_FIRMWARE}/.build/build.log.{keyboard_safe}" >/dev/null 2>&1 && printf "Build %-64s \e[1;31m[ERRORS]\e[0m\\n" "{keyboard_name}:default" ; }} \\
+		|| {{ grep '\[WARNINGS\]' "{QMK_FIRMWARE}/.build/build.log.{keyboard_safe}" >/dev/null 2>&1 && printf "Build %-64s \e[1;33m[WARNINGS]\e[0m\\n" "{keyboard_name}:default" ; }} \\
+		|| printf "Build %-64s \e[1;32m[OK]\e[0m\\n" "{keyboard_name}:default"
+	@rm -f "{QMK_FIRMWARE}/.build/build.log.{keyboard_safe}" || true
+
+""" # noqa: yapf should not care about the formatting of the Makefile
+            )
+
+    cli.run([make_cmd, '-j', str(cli.args.parallel), '-f', makefile, 'all'], capture_output=False, text=False)