Pass Git hash to docker build in CI script

Author: ali-ince

ci/linux-package.sh

@@ -12,7 +12,9 @@ if [[ ! -f "$BASE/linux/Dockerfile.package-$1" ]]; then
     exit 1
 fi
 
-docker image build --build-arg SEABOLT_VERSION=$SEABOLT_VERSION -t seabolt-package -f $BASE/linux/Dockerfile.package-$1 $BASE/..
+GIT_HASH=$(git log -1 --pretty=format:%h $BASE 2>/dev/null || echo "unknown")
+
+docker image build --build-arg SEABOLT_VERSION=$SEABOLT_VERSION --build-arg SEABOLT_VERSION_HASH=$GIT_HASH -t seabolt-package -f $BASE/linux/Dockerfile.package-$1 $BASE/..
 if [[ "$?" -ne "0" ]]; then
     echo "FATAL: docker image build failed, possible compilation failure."
     exit 1

ci/linux/Dockerfile.package-alpine-3.8

@@ -1,7 +1,9 @@
 FROM alpine:3.8
 RUN apk add --no-cache ca-certificates cmake make g++ openssl-dev git
 ARG SEABOLT_VERSION
+ARG SEABOLT_VERSION_HASH
 ENV SEABOLT_VERSION=$SEABOLT_VERSION
+ENV SEABOLT_VERSION_HASH=$SEABOLT_VERSION_HASH
 ADD . /tmp/seabolt
 WORKDIR /tmp/seabolt/build-docker
 RUN cmake -D CMAKE_BUILD_TYPE=Release /tmp/seabolt \

ci/linux/Dockerfile.package-centos-7

@@ -3,7 +3,9 @@ RUN yum -y install openssl-devel openssl-static wget pkg-config ca-certificates
         && (mkdir -p /cmake && wget --no-verbose --output-document=- https://cmake.org/files/v3.12/cmake-3.12.3-Linux-x86_64.tar.gz | tar xvz -C /cmake --strip 1) \
         && yum -y clean all
 ARG SEABOLT_VERSION
+ARG SEABOLT_VERSION_HASH
 ENV SEABOLT_VERSION=$SEABOLT_VERSION
+ENV SEABOLT_VERSION_HASH=$SEABOLT_VERSION_HASH
 ADD . /tmp/seabolt
 WORKDIR /tmp/seabolt/build-docker
 RUN /cmake/bin/cmake -D CMAKE_BUILD_TYPE=Release /tmp/seabolt \

ci/linux/Dockerfile.package-ubuntu-16.04

@@ -4,7 +4,9 @@ RUN apt-get update \
         && (mkdir -p /cmake && wget --no-verbose --output-document=- https://cmake.org/files/v3.12/cmake-3.12.3-Linux-x86_64.tar.gz | tar xvz -C /cmake --strip 1) \
         && rm -rf /var/lib/apt/lists/*
 ARG SEABOLT_VERSION
+ARG SEABOLT_VERSION_HASH
 ENV SEABOLT_VERSION=$SEABOLT_VERSION
+ENV SEABOLT_VERSION_HASH=$SEABOLT_VERSION_HASH
 ADD . /tmp/seabolt
 WORKDIR /tmp/seabolt/build-docker
 RUN /cmake/bin/cmake -D CMAKE_BUILD_TYPE=Release /tmp/seabolt \

ci/linux/Dockerfile.package-ubuntu-18.04

@@ -4,7 +4,9 @@ RUN apt-get update \
         && (mkdir -p /cmake && wget --no-verbose --output-document=- https://cmake.org/files/v3.12/cmake-3.12.3-Linux-x86_64.tar.gz | tar xvz -C /cmake --strip 1) \
         && rm -rf /var/lib/apt/lists/*
 ARG SEABOLT_VERSION
+ARG SEABOLT_VERSION_HASH
 ENV SEABOLT_VERSION=$SEABOLT_VERSION
+ENV SEABOLT_VERSION_HASH=$SEABOLT_VERSION_HASH
 ADD . /tmp/seabolt
 WORKDIR /tmp/seabolt/build-docker
 RUN /cmake/bin/cmake -D CMAKE_BUILD_TYPE=Release /tmp/seabolt \

cmake/GitHash.cmake

@@ -1,18 +1,23 @@
 # in case Git is not available, we default to "unknown"
 set(VERSION_HASH "unknown")
 
-# find Git and if available set GIT_HASH variable
-find_package(Git QUIET)
-if (GIT_FOUND)
-    execute_process(
-            COMMAND ${GIT_EXECUTABLE} log -1 --pretty=format:%h
-            OUTPUT_VARIABLE VERSION_HASH
-            OUTPUT_STRIP_TRAILING_WHITESPACE
-            ERROR_QUIET
-    )
-endif ()
+if (DEFINED ENV{SEABOLT_VERSION_HASH})
+    set(VERSION_HASH $ENV{SEABOLT_VERSION_HASH})
+    message(STATUS "Using Git hash from environment: ${VERSION_HASH}")
+else ()
+    # find Git and if available set GIT_HASH variable
+    find_package(Git QUIET)
+    if (GIT_FOUND)
+        execute_process(
+                COMMAND ${GIT_EXECUTABLE} log -1 --pretty=format:%h
+                OUTPUT_VARIABLE VERSION_HASH
+                OUTPUT_STRIP_TRAILING_WHITESPACE
+                ERROR_QUIET
+        )
+    endif ()
 
-message(STATUS "Git hash is ${VERSION_HASH}")
+    message(STATUS "Using Git hash from git command: ${VERSION_HASH}")
+endif ()
 
 # generate file version.hpp based on version.hpp.in
 configure_file(