HADOOP-17298. Backslash in username causes build failure in the environment started by start-build-env.sh. (#2367)

Signed-off-by: Akira Ajisaka <aajisaka@apache.org>
(cherry picked from commit a2e7a073f03f682d6716ed59c60533be09841784)

start-build-env.sh

@@ -66,13 +66,16 @@ if [ "$(uname -s)" = "Linux" ]; then
   fi
 fi
 
+# Set the home directory in the Docker container.
+DOCKER_HOME_DIR=${DOCKER_HOME_DIR:-/home/${USER_NAME}}
+
 docker build -t "hadoop-build-${USER_ID}" - <<UserSpecificDocker
 FROM hadoop-build
 RUN rm -f /var/log/faillog /var/log/lastlog
 RUN groupadd --non-unique -g ${GROUP_ID} ${USER_NAME}
-RUN useradd -g ${GROUP_ID} -u ${USER_ID} -k /root -m ${USER_NAME}
+RUN useradd -g ${GROUP_ID} -u ${USER_ID} -k /root -m ${USER_NAME} -d "${DOCKER_HOME_DIR}"
 RUN echo "${USER_NAME} ALL=NOPASSWD: ALL" > "/etc/sudoers.d/hadoop-build-${USER_ID}"
-ENV HOME /home/${USER_NAME}
+ENV HOME "${DOCKER_HOME_DIR}"
 
 UserSpecificDocker
 
@@ -85,9 +88,9 @@ DOCKER_INTERACTIVE_RUN=${DOCKER_INTERACTIVE_RUN-"-i -t"}
 # system.  And this also is a significant speedup in subsequent
 # builds because the dependencies are downloaded only once.
 docker run --rm=true $DOCKER_INTERACTIVE_RUN \
-  -v "${PWD}:/home/${USER_NAME}/hadoop${V_OPTS:-}" \
-  -w "/home/${USER_NAME}/hadoop" \
-  -v "${HOME}/.m2:/home/${USER_NAME}/.m2${V_OPTS:-}" \
-  -v "${HOME}/.gnupg:/home/${USER_NAME}/.gnupg${V_OPTS:-}" \
+  -v "${PWD}:${DOCKER_HOME_DIR}/hadoop${V_OPTS:-}" \
+  -w "${DOCKER_HOME_DIR}/hadoop" \
+  -v "${HOME}/.m2:${DOCKER_HOME_DIR}/.m2${V_OPTS:-}" \
+  -v "${HOME}/.gnupg:${DOCKER_HOME_DIR}/.gnupg${V_OPTS:-}" \
   -u "${USER_ID}" \
   "hadoop-build-${USER_ID}" "$@"