From 7caef9c744fe483236cba664a7143c892bea99d8 Mon Sep 17 00:00:00 2001
From: Drath <drath@drath.cc>
Date: Tue, 21 Jul 2026 20:57:39 +0200
Subject: [PATCH] tell it what ver it is

---
 meson.build | 16 ++++++++++++++++
 src/main.c  | 11 +++++++++--
 2 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/meson.build b/meson.build
index f2bc702..7f92d8f 100644
--- a/meson.build
+++ b/meson.build
@@ -24,6 +24,22 @@ srcs = [
 
 cc = meson.get_compiler('c')
 
+git = find_program('git', required : false)
+
+if git.found()
+    git_hash = run_command(git, 'rev-parse', '--short', 'HEAD', check: false).stdout().strip()
+    git_commits = run_command(git, 'rev-list', '--count', 'HEAD', check: false).stdout().strip()
+else
+    git_hash = 'unknown'
+    git_commits = '0'
+endif
+
+add_project_arguments(
+    '-DGIT_HASH="' + git_hash + '"',
+    '-DGIT_COMMITS="' + git_commits + '"',
+    language: 'c'
+)
+
 executable(
     'linuxSmartie',
     srcs,
diff --git a/src/main.c b/src/main.c
index bf5cf03..eb49b7d 100644
--- a/src/main.c
+++ b/src/main.c
@@ -98,9 +98,16 @@ static void *display_thread(void *arg) {
 	lcd_init(&lcd);
 	lcd_set_backlight(&lcd, true);
 	lcd_set_contrast(&lcd, lcd_contrast);
-	lcd_write_buf(&lcd, 1, 9, "Waiting for sensors..."); // need to center this still
+
+	lcd_write_buf(&lcd, 0, 14, "linuxSmartie");
+	lcd_writef(&lcd, 0, 2, "Ver. hash %s", GIT_HASH);
+	lcd_writef(&lcd, 0, 3, "Commit no. %s", GIT_COMMITS);
 	lcd_flush_buf(&lcd);
 	lcd_clear_buf(&lcd);
+	struct timespec next;
+	clock_gettime(CLOCK_REALTIME, &next);
+	timespec_add_ms(&next, refresh_interval_ms);
+	clock_nanosleep(CLOCK_REALTIME, TIMER_ABSTIME, &next, nullptr);
 
 	/* setup custom chars */
 	lcd_set_custom_char(&lcd, 0, &(lcd_glyph_t){16, 6, 9, 8, 8, 9, 6, 0});	  // celcius
@@ -172,7 +179,7 @@ static void *display_thread(void *arg) {
 }
 
 int main(void) {
-	applog(LOG_START, "linuxSmartie starting");
+	applog(LOG_START, "linuxSmartie r%s (%s) starting", GIT_COMMITS, GIT_HASH);
 	applog(LOG_DBG, "Compiled with %s", C_STD);
 
 	/* see if another instance is up, quit if it is */