From 1affc55b17cb68c748ef6f5192705b0a0d536ea0 Mon Sep 17 00:00:00 2001
From: Ulysses Souza <ulysses.souza@docker.com>
Date: Thu, 22 Nov 2018 15:58:41 +0100
Subject: [PATCH] Adopts 'unknown' as build revision in case git cannot
 retrieve it.

Signed-off-by: Ulysses Souza <ulysses.souza@docker.com>
---
 script/build/write-git-sha | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/script/build/write-git-sha b/script/build/write-git-sha
index d16743c6f..be87f5058 100755
--- a/script/build/write-git-sha
+++ b/script/build/write-git-sha
@@ -2,6 +2,11 @@
 #
 # Write the current commit sha to the file GITSHA. This file is included in
 # packaging so that `docker-compose version` can include the git sha.
-#
-set -e
-git rev-parse --short HEAD > compose/GITSHA
+# sets to 'unknown' and echoes a message if the command is not successful
+
+DOCKER_COMPOSE_GITSHA="$(git rev-parse --short HEAD)"
+if [[ "${?}" != "0" ]]; then
+    echo "Couldn't get revision of the git repository. Setting to 'unknown' instead"
+    DOCKER_COMPOSE_GITSHA="unknown"
+fi
+echo "${DOCKER_COMPOSE_GITSHA}" > compose/GITSHA