build: setup env for local development

.envrc

@@ -0,0 +1 @@
+layout python3

.gitignore

@@ -0,0 +1,8 @@
+.build
+.direnv
+.venv
+.west
+modules
+firmware
+zephyr
+zmk

Justfile

@@ -0,0 +1,87 @@
+default:
+    @just --list --unsorted
+
+config := absolute_path('config')
+build := absolute_path('.build')
+out := absolute_path('firmware')
+
+# parse combos.dtsi and adjust settings to not run out of slots
+_parse_combos:
+    #!/usr/bin/env bash
+    set -euo pipefail
+    cconf="{{ config / 'combos.dtsi' }}"
+    if [[ -f $cconf ]]; then
+        # set MAX_COMBOS_PER_KEY to the most frequent combos count
+        count=$(
+            tail -n +10 $cconf |
+                grep -Eo '[LR][TMBH][0-9]' |
+                sort | uniq -c | sort -nr |
+                awk 'NR==1{print $1}'
+        )
+        sed -Ei "/CONFIG_ZMK_COMBO_MAX_COMBOS_PER_KEY/s/=.+/=$count/" "{{ config }}"/*.conf
+        echo "Setting MAX_COMBOS_PER_KEY to $count"
+
+        # set MAX_KEYS_PER_COMBO to the most frequent key count
+        count=$(
+            tail -n +10 $cconf |
+                grep -o -n '[LR][TMBH][0-9]' |
+                cut -d : -f 1 | uniq -c | sort -nr |
+                awk 'NR==1{print $1}'
+        )
+        sed -Ei "/CONFIG_ZMK_COMBO_MAX_KEYS_PER_COMBO/s/=.+/=$count/" "{{ config }}"/*.conf
+        echo "Setting MAX_KEYS_PER_COMBO to $count"
+    fi
+
+# parse build.yaml and filter targets by expression
+_parse_targets $expr:
+    #!/usr/bin/env bash
+    attrs="[.board, .shield]"
+    filter=".include[] | [.board, .shield] | join(\",\")"
+    echo "$(yq -r "$filter" build.yaml | grep -i "${expr/#all/.*}")"
+
+# build firmware for single board & shield combination
+_build_single $board $shield *west_args:
+    #!/usr/bin/env bash
+    set -euo pipefail
+    artifact="${shield:+$shield-}${board}"
+    build_dir="{{ build / '$artifact' }}"
+
+    echo "Building firmware for $artifact..."
+    west build -s zmk/app -d "$build_dir" -b $board {{ west_args }} -- \
+        ${shield:+-DSHIELD="$shield"} \
+        -DZMK_CONFIG="{{ config }}" \
+
+    if [[ -f "$build_dir/zephyr/zmk.uf2" ]]; then
+        mkdir -p "{{ out }}" && cp "$build_dir/zephyr/zmk.uf2" "{{ out }}/$artifact.uf2"
+    else
+        mkdir -p "{{ out }}" && cp "$build_dir/zephyr/zmk.bin" "{{ out }}/$artifact.bin"
+    fi
+
+# build firmware for matching targets
+build expr *west_args: _parse_combos
+    #!/usr/bin/env bash
+    set -euo pipefail
+    targets=$(just _parse_targets {{ expr }})
+
+    [[ -z $targets ]] && echo "No matching targets found. Aborting..." >&2 && exit 1
+    echo "$targets" | while IFS=, read -r board shield; do
+        just _build_single "$board" "$shield" {{ west_args }}
+    done
+
+# clear build cache and artifacts
+clean:
+    rm -rf {{ build }} {{ out }}
+
+# initialize west
+init:
+    west init -l config
+    west update
+    west zephyr-export
+
+# update west
+update:
+    west update
+
+# list build targets
+list:
+    @just _parse_targets all | sed 's/,$//' | sort | column

config/custom_behavior.dtsi

@@ -1,6 +1,6 @@
 / {
     behaviors {
-        swapper: swapper {
+        sw_win: swapper {
             compatible = "zmk,behavior-tri-state";
             #binding-cells = <0>;
             bindings = <&kt RGUI>, <&kp TAB>, <&kt RGUI>;  // Cmd, Tab, and release Cmd

config/splitkb_aurora_corne.keymap

@@ -55,7 +55,7 @@
 // | SHFT |     |     |     |     |     |   |     |     |     |     |     |      |
 //                    | GUI |     | SPC |   | ENT |     | ALT |
                         bindings = <
-   &swapper   &kp N1       &kp N2       &kp N3       &kp N4       &kp N5         &kp N6   &kp N7   &kp N8 &kp N9    &kp N0 &kp BSPC
+   &sw_win  &kp N1       &kp N2       &kp N3       &kp N4       &kp N5         &kp N6   &kp N7   &kp N8 &kp N9    &kp N0 &kp BSPC
    &bt BT_CLR &bt BT_SEL 0 &bt BT_SEL 1 &bt BT_SEL 2 &bt BT_SEL 3 &bt BT_SEL 4   &kp LEFT &kp DOWN &kp UP &kp RIGHT &trans &trans
    &kp LSHFT  &trans       &trans       &trans       &trans       &trans         &trans   &trans   &trans &trans    &trans &trans
                                     &kp LGUI     &trans       &kp SPACE      &kp RET  &trans   &kp RALT

config/west.yml

@@ -4,8 +4,7 @@ manifest:
       url-base: https://github.com/zmkfirmware
     - name: dhruvinsh
       url-base: https://github.com/dhruvinsh
-    # Additional modules containing boards/shields/custom code can be listed here as well
-    # See https://docs.zephyrproject.org/3.2.0/develop/west/manifest.html#projects
+
   projects:
     - name: zmk
       remote: zmkfirmware
@@ -14,5 +13,6 @@ manifest:
     - name: zmk-tri-state
       remote: dhruvinsh
       revision: main
+      path: modules/tri-state
   self:
     path: config