From 063908a90e8a4d371d0e4907f580c1edbc6a1495 Mon Sep 17 00:00:00 2001
From: Florian Fleissner <florian.fleissner@inpartik.de>
Date: Wed, 27 Feb 2019 18:26:30 +0100
Subject: Fallback settings for BOARD_HARDWARE_PATH

This commit allows the Makefile to check if the BOARD_HARDWARE_PATH
it tried to determine based on the system specific Arduino installation
is correct. This is done by checking for the Kaleidoscope library's existence.
If Kaleidoscope is not found, the Makefile falls back to determining
the hardware path relative to its own location. This even enables
building from any location where a *.ino file lives without
the requirement to checkout the kaleidoscope libraries into
Arduino installation's hardware path or to symlink them there.

The following now is possible

> SOURCE_DIR=<place where the sources live>
> cd $SOURCE_DIR
> mkdir hardware
> git clone --recursive <URL of the Kaleidoscope bundle> hardware/keyboardio
> BUILD_DIR=<location where a *.ino file lives>
> cd $BUILD_DIR
> make -f $SOURCE_DIR/hardware/keyboardio/avr/libraries/Model01-Firmware/Makefile

for quick builds

> SOURCE_DIR=<place where the sources live>
> cd $SOURCE_DIR
> mkdir hardware
> git clone --recursive <URL of the Kaleidoscope bundle> hardware/keyboardio
> cd hardware/keyboardio/avr/libraries/Model01-Firmware make

Signed-off-by: Florian Fleissner <florian.fleissner@inpartik.de>
---
 Makefile | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'Makefile')

diff --git a/Makefile b/Makefile
index 14a7f3c..9ae32d0 100644
--- a/Makefile
+++ b/Makefile
@@ -52,4 +52,14 @@ endif
 BOARD_HARDWARE_PATH ?= $(SKETCHBOOK_DIR)/hardware
 KALEIDOSCOPE_PLUGIN_MAKEFILE_DIR ?= keyboardio/build-tools/makefiles/
 
+# If Kaleidoscope's Arduino libraries cannot be found, e.g. because 
+# they reside outside of SKETCHBOOK_DIR, we fall back to assuming that 
+# the hardware directory can be determined in relation to the position of 
+# this Makefile.
+ifeq ("$(wildcard $(BOARD_HARDWARE_PATH)/keyboardio/avr/libraries/Kaleidoscope)","")
+   # Determine the path of this Makefile
+   MKFILE_DIR:=$(shell dirname $(realpath $(lastword $(MAKEFILE_LIST))))
+   BOARD_HARDWARE_PATH = $(MKFILE_DIR)/../../../..
+endif
+
 include $(BOARD_HARDWARE_PATH)/$(KALEIDOSCOPE_PLUGIN_MAKEFILE_DIR)/rules.mk
-- 
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