Ignore build files

.gitignore

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+build
+node_modules
+.lock*

countdown_watchface/package-lock.json

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+{
+  "name": "countdown_watchface",
+  "version": "1.0.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "countdown_watchface",
+      "version": "1.0.0",
+      "dependencies": {
+        "pebble-effect-layer": "^1.2.0"
+      }
+    },
+    "node_modules/pebble-effect-layer": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/pebble-effect-layer/-/pebble-effect-layer-1.2.0.tgz",
+      "integrity": "sha512-AMbf4ooRCy/olsf3M5xOgILP+NSvfGlt12I0KAK0cD2F+dbx2gj24/xe9qINJVEhdfel624tP4jzjPJYMsR4Pw=="
+    }
+  }
+}

countdown_watchface/package.json

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+{
+  "name": "countdown_watchface",
+  "author": "Bas Grolleman",
+  "version": "1.0.0",
+  "keywords": [
+    "pebble-app"
+  ],
+  "private": true,
+  "dependencies": {
+    "pebble-effect-layer": "^1.2.0"
+  },
+  "pebble": {
+    "displayName": "countdown_watchface",
+    "uuid": "769d0058-ae41-4e80-b41a-64d58e2ae3e0",
+    "sdkVersion": "3",
+    "enableMultiJS": true,
+    "targetPlatforms": [
+      "aplite",
+      "basalt",
+      "diorite",
+      "emery",
+      "flint"
+    ],
+    "watchapp": {
+      "watchface": true
+    },
+    "messageKeys": [
+      "dummy"
+    ],
+    "resources": {
+      "media": []
+    }
+  }
+}

countdown_watchface/src/c/watchface.c

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+#include <pebble.h>
+#include <pebble-effect-layer/pebble-effect-layer.h>
+
+static Window *s_main_window;
+static TextLayer *s_time_layer;
+static TextLayer *s_date_layer;
+static TextLayer *s_cd_layer;
+static EffectLayer *s_effect_layer;
+
+static void main_window_load(Window *window) {
+  Layer *window_layer = window_get_root_layer(window);
+  GRect bounds = layer_get_bounds(window_layer);
+
+  s_effect_layer = effect_layer_create(bounds);
+  effect_layer_add_effect(s_effect_layer, effect_invert, NULL);
+  layer_add_child(window_layer,effect_layer_get_layer(s_effect_layer));
+
+  s_time_layer = text_layer_create(
+    GRect(0, PBL_IF_ROUND_ELSE(58,52), bounds.size.w, 50)
+  );
+
+  // Improve the layout to be more like a watchface
+  text_layer_set_background_color(s_time_layer, GColorClear);
+  text_layer_set_text_color(s_time_layer, GColorWhite);
+  text_layer_set_text(s_time_layer, "00:00");
+  text_layer_set_font(s_time_layer, fonts_get_system_font(FONT_KEY_ROBOTO_BOLD_SUBSET_49));
+  text_layer_set_text_alignment(s_time_layer, GTextAlignmentCenter);
+
+  // Add it as a child layer to the Window's root layer
+  layer_add_child(window_layer, text_layer_get_layer(s_time_layer));
+
+  s_date_layer = text_layer_create(
+    GRect(0, PBL_IF_ROUND_ELSE(108,102), bounds.size.w, 50)
+  );
+
+  // Improve the layout to be more like a watchface
+  text_layer_set_background_color(s_date_layer, GColorClear);
+  text_layer_set_text_color(s_date_layer, GColorWhite);
+  text_layer_set_text(s_date_layer, "Wed 1st Jan");
+  text_layer_set_font(s_date_layer, fonts_get_system_font(FONT_KEY_ROBOTO_CONDENSED_21));
+  text_layer_set_text_alignment(s_date_layer, GTextAlignmentCenter);
+
+  // Add it as a child layer to the Window's root layer
+  layer_add_child(window_layer, text_layer_get_layer(s_date_layer));
+  
+  s_cd_layer = text_layer_create(
+    GRect(0, PBL_IF_ROUND_ELSE(18,12), bounds.size.w, 50)
+  );
+
+  // Improve the layout to be more like a watchface
+  text_layer_set_background_color(s_cd_layer, GColorClear);
+  text_layer_set_text_color(s_cd_layer, GColorWhite);
+  text_layer_set_text(s_cd_layer, "-----==========");
+  text_layer_set_font(s_cd_layer, fonts_get_system_font(FONT_KEY_GOTHIC_18));
+  text_layer_set_text_alignment(s_cd_layer, GTextAlignmentCenter);
+
+  // Add it as a child layer to the Window's root layer
+  layer_add_child(window_layer, text_layer_get_layer(s_cd_layer));
+}
+
+static void main_window_unload(Window *window) {
+  text_layer_destroy(s_time_layer);
+  text_layer_destroy(s_date_layer);
+  text_layer_destroy(s_cd_layer);
+  effect_layer_destroy(s_effect_layer);
+}
+
+static void update_time() {
+  time_t temp = time(NULL);
+  struct tm *tick_time = localtime(&temp);
+
+  static char s_buffer[8];
+  strftime(s_buffer, sizeof(s_buffer), clock_is_24h_style() ? "%H:%M" : "%I:%M", tick_time);
+
+  text_layer_set_text(s_time_layer, s_buffer);
+  
+  static char d_buffer[12];
+  strftime(d_buffer, sizeof(d_buffer), "%a %d %b", tick_time);
+  
+  text_layer_set_text(s_date_layer, d_buffer);
+
+}
+
+static void tick_handler(struct tm *tick_time, TimeUnits units_changed) {
+  update_time();
+}
+
+static void init() {
+  s_main_window = window_create();
+
+  window_set_window_handlers(s_main_window, (WindowHandlers) {
+    .load = main_window_load,
+    .unload = main_window_unload
+  });
+
+  window_stack_push(s_main_window, true);
+
+  tick_timer_service_subscribe(MINUTE_UNIT, tick_handler);
+  update_time();
+}
+
+static void deinit() {
+  window_destroy(s_main_window);
+}
+
+
+int main(void) {
+  init();
+  app_event_loop();
+  deinit();
+  return 0;
+}

countdown_watchface/wscript

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+#
+# This file is the default set of rules to compile a Pebble application.
+#
+# Feel free to customize this to your needs.
+#
+import os.path
+
+top = '.'
+out = 'build'
+
+
+def options(ctx):
+    ctx.load('pebble_sdk')
+
+
+def configure(ctx):
+    """
+    This method is used to configure your build. ctx.load(`pebble_sdk`) automatically configures
+    a build for each valid platform in `targetPlatforms`. Platform-specific configuration: add your
+    change after calling ctx.load('pebble_sdk') and make sure to set the correct environment first.
+    Universal configuration: add your change prior to calling ctx.load('pebble_sdk').
+    """
+    ctx.load('pebble_sdk')
+
+
+def build(ctx):
+    ctx.load('pebble_sdk')
+
+    build_worker = os.path.exists('worker_src')
+    binaries = []
+
+    cached_env = ctx.env
+    for platform in ctx.env.TARGET_PLATFORMS:
+        ctx.env = ctx.all_envs[platform]
+        ctx.set_group(ctx.env.PLATFORM_NAME)
+        app_elf = '{}/pebble-app.elf'.format(ctx.env.BUILD_DIR)
+        ctx.pbl_build(source=ctx.path.ant_glob('src/c/**/*.c'), target=app_elf, bin_type='app')
+
+        if build_worker:
+            worker_elf = '{}/pebble-worker.elf'.format(ctx.env.BUILD_DIR)
+            binaries.append({'platform': platform, 'app_elf': app_elf, 'worker_elf': worker_elf})
+            ctx.pbl_build(source=ctx.path.ant_glob('worker_src/c/**/*.c'),
+                          target=worker_elf,
+                          bin_type='worker')
+        else:
+            binaries.append({'platform': platform, 'app_elf': app_elf})
+    ctx.env = cached_env
+
+    ctx.set_group('bundle')
+    ctx.pbl_bundle(binaries=binaries,
+                   js=ctx.path.ant_glob(['src/pkjs/**/*.js',
+                                         'src/pkjs/**/*.json',
+                                         'src/common/**/*.js']),
+                   js_entry_file='src/pkjs/index.js')