From f21b00ab9ac2d1bfd75405c46dd9fb3342e022c7 Mon Sep 17 00:00:00 2001
From: Jacek Nykis <jacek@stellar.org>
Date: Fri, 10 Sep 2021 12:15:48 +0100
Subject: [PATCH] Update docker image build timestamp format

Golang time parser is not compatible with format rendered by the GNU date,
even though both claim to be RFC3339. This change replaces space separator
betwen date and time with "T" which will allow golang to parse it.
It also switches from `--utc` to `-u` that's supported by both GNU and BSD
date commands.
---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 205a50bc..7c0fb02e 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,7 @@ LABEL ?= $(shell git rev-parse --short HEAD)$(and $(shell git status -s),-dirty-
 # If TAG is not provided set default value
 TAG ?= stellar/account-viewer-v2:$(LABEL)
 # https://github.com/opencontainers/image-spec/blob/master/annotations.md
-BUILD_DATE := $(shell date --utc --rfc-3339=seconds)
+BUILD_DATE := $(shell date -u +%FT%TZ)
 
 docker-build:
 	$(SUDO) docker build --pull --label org.opencontainers.image.created="$(BUILD_DATE)" -t $(TAG) .