Configure macros for multi-key combos

This makes use of the functionality in the following PR:
zmkfirmware/zmk#685

Makefile

@@ -1,13 +1,14 @@
 board=nice_nano
 shield=cradio
-zmk_app=${HOME}/code/zmk/app
 zmk_config=${HOME}/zmk-config
-build=${zmk_config}/.build
+zmk=${zmk_config}/zmk
+zmk_image=zmkfirmware/zmk-dev-arm:2.4
+build=${zmk}/build
 bootloader=/media/${USER}/NICENANO
 
 define do_build
 	mkdir -pv "${build}/${shield}_$(1)"
-	cd "${zmk_app}" && \
+	cd "${zmk}/app" && \
 		west build --pristine -d "${build}/${shield}_$(1)" -b "${board}" \
 			-- -DSHIELD="${shield}_$(1)" -DZMK_CONFIG="${zmk_config}/config"
 endef
@@ -21,7 +22,20 @@ endef
 
 .PHONY: build flash clean
 
-build:
+zmk:
+	# Get ZMK codebase:
+	git clone https://github.com/zmkfirmware/zmk ${zmk}
+	# Apply patches:
+	git -C ${zmk} remote add -ft macros okke-formsa https://github.com/okke-formsma/zmk
+	git -C ${zmk} remote add -ft cradio-v2 davidphilipbarr https://github.com/davidphilipbarr/zmk
+	git -C ${zmk} merge davidphilipbarr/cradio-v2 --no-edit --no-gpg-sign
+	git -C ${zmk} merge okke-formsa/macros --no-edit --no-gpg-sign
+	# Set up workspace:
+	docker run --rm --userns=host --user=$(shell id -u) \
+		--workdir="/zmk" --volume="${zmk}:/zmk" "${zmk_image}" \
+		sh -c 'west init -l app; west update'
+
+build: zmk
 	$(call do_build,left)
 	$(call do_build,right)
 
@@ -32,4 +46,4 @@ flash-right:
 	$(call do_flash,right)
 
 clean:
-	rm -rf ${build}
+	rm -rf ${build} ${zmk}

config/combos.dtsi

@@ -136,4 +136,41 @@ combos {
     key-positions = <32 17>;
   };
 
+  // Common patterns
+
+  combo_double_dash {
+    bindings = <&macro_double_dash>;
+    key-positions = <31 11 12>;
+  };
+
+  combo_double_ampersand {
+    bindings = <&macro_double_ampersand>;
+    key-positions = <32 28 29>;
+  };
+
+  combo_brackets {
+    bindings = <&macro_brackets>;
+    key-positions = <32 7 8>;
+  };
+
+  combo_code_fence {
+    bindings = <&macro_code_fence>;
+    key-positions = <31 12 13>;
+  };
+
+  combo_double_pipe {
+    bindings = <&macro_double_pipe>;
+    key-positions = <31 21 22>;
+  };
+
+  combo_parentheses {
+    bindings = <&macro_parentheses>;
+    key-positions = <31 1 2>;
+  };
+
+  combo_shell_command {
+    bindings = <&macro_shell_command>;
+    key-positions = <31 1 2 3>;
+  };
+
 };

config/cradio.keymap

@@ -19,6 +19,12 @@
 
   #include "combos.dtsi"
 
+  behaviors {
+
+    #include "macros.dtsi"
+
+  };
+
   keymap {
     compatible = "zmk,keymap";
 

config/macros.dtsi

@@ -0,0 +1,48 @@
+macro_double_dash: macro_double_dash {
+  compatible = "zmk,behavior-macro";
+  label = "macro_double_dash";
+  #binding-cells = <0>;
+  bindings = <&kp MINUS>, <&kp MINUS>;
+};
+
+macro_double_ampersand: macro_double_ampersand {
+  compatible = "zmk,behavior-macro";
+  label = "macro_double_ampersand";
+  #binding-cells = <0>;
+  bindings = <&kp AMPERSAND>, <&kp AMPERSAND>;
+};
+
+macro_brackets: macro_brackets {
+  compatible = "zmk,behavior-macro";
+  label = "macro_brackets";
+  #binding-cells = <0>;
+  bindings = <&kp LEFT_BRACKET>, <&kp RIGHT_BRACKET>, <&kp LEFT>;
+};
+
+macro_code_fence: macro_code_fence {
+  compatible = "zmk,behavior-macro";
+  label = "macro_code_fence";
+  #binding-cells = <0>;
+  bindings = <&kp GRAVE>, <&kp GRAVE>, <&kp GRAVE>;
+};
+
+macro_double_pipe: macro_double_pipe {
+  compatible = "zmk,behavior-macro";
+  label = "macro_double_pipe";
+  #binding-cells = <0>;
+  bindings = <&kp PIPE>, <&kp PIPE>, <&kp LEFT>;
+};
+
+macro_parentheses: macro_parentheses {
+  compatible = "zmk,behavior-macro";
+  label = "macro_parentheses";
+  #binding-cells = <0>;
+  bindings = <&kp LEFT_PARENTHESIS>, <&kp RIGHT_PARENTHESIS>, <&kp LEFT>;
+};
+
+macro_shell_command: macro_shell_command {
+  compatible = "zmk,behavior-macro";
+  label = "macro_shell_command";
+  #binding-cells = <0>;
+  bindings = <&kp DOLLAR>, <&kp LEFT_PARENTHESIS>, <&kp RIGHT_PARENTHESIS>, <&kp LEFT>;
+};