better control of qr genration

wedding-invitation/Makefile

@@ -9,9 +9,9 @@ default: $(TARGET)
 $(TARGET): $(INPUT) Makefile $(QR)
 	$(TEX) $< && $(TEX) $< 
 
-$(QR): event.txt
-	cat $< | qr > $@
+$(QR): qrEvent_vi.txt
+	./qrGen.py
 
 clean:
-	rm -f $(DOC).{pdf,out,aux,log}
+	rm -f $(DOC).{pdf,out,aux,log} $(QR)
 	rm -f *.{pdf,out,aux,log,bbl,blg}

wedding-invitation/qrEvent_vi.txt

@@ -2,9 +2,8 @@ BEGIN:VCALENDAR
 VERSION:2.0
 BEGIN:VEVENT
 SUMMARY:Đám cưới Nam-Hương
-DTSTART:20200301
-DTEND:20200301
-DTSTAMP:20200301T140000
+DTSTART;TZID=Asia/Saigon:20200301T160000
+DTEND;TZID=Asia/Saigon:20200301T200000
 LOCATION:Nhà hàng Âu Cơ, 1A Nguyễn Hữu Cầu, P. Ngọc Châu, Thành phố Hải Dương, Hải Dương, Vietnam
 GEO:20.9351879;106.3433482,18
 URL:https://goo.gl/maps/eyfMhXgjFTQzAWB79

wedding-invitation/qrGen.py

@@ -0,0 +1,14 @@
+#!/usr/bin/env python3
+import qrcode
+
+qr = qrcode.QRCode(
+    version=2,
+    error_correction=qrcode.constants.ERROR_CORRECT_Q,
+    box_size=5,
+    border=1)
+
+with open("qrEvent_vi.txt") as fp:
+    qr.add_data(fp.read())
+    qr.make(fit=True)
+    img = qr.make_image(fill_color="orangered", back_color="white")
+    img.save("qr.png")