[docker-base]: Add less, strace, and configuration for vim (#591)

* Add less in docker-base. Add strace in docker_base_dbg.
* Make link vim to vim.tiny and have vim config file

build_debian.sh

@@ -199,6 +199,7 @@ sudo LANG=C DEBIAN_FRONTEND=noninteractive chroot $FILESYSTEM_ROOT apt-get -y in
     logrotate               \
     curl                    \
     kexec-tools             \
+    less                    \
     unzip
 
 ## Disable kexec supported reboot which was installed by default

dockers/docker-base/Dockerfile.j2

@@ -27,10 +27,12 @@ RUN apt-get -y install \
     supervisor         \
     vim-tiny           \
     perl               \
-    python
+    python             \
+    less
 
 COPY ["etc/rsyslog.conf", "/etc/rsyslog.conf"]
 COPY ["etc/rsyslog.d/*", "/etc/rsyslog.d/"]
+COPY ["root/.vimrc", "/root/.vimrc"]
 
 RUN apt-get -y purge   \
     exim4              \
@@ -44,6 +46,8 @@ RUN apt-get -y install \
 {% for dbg_pkg in docker_base_dbgs.split(' ') -%}
     {{ dbg_pkg }}{{' '}}
 {%- endfor %}
+{% else %}
+RUN ln /usr/bin/vim.tiny /usr/bin/vim
 {% endif %}
 
 ## Clean up apt

dockers/docker-base/root/.vimrc

@@ -0,0 +1,2 @@
+" enable vim features
+set nocompatible

rules/docker-base.mk

@@ -8,7 +8,8 @@ GDB = gdb
 VIM = vim
 OPENSSH = openssh-client
 SSHPASS = sshpass
-$(DOCKER_BASE)_DBG_PACKAGES += $(GDB) $(VIM) $(OPENSSH) $(SSHPASS)
+STRACE = strace
+$(DOCKER_BASE)_DBG_PACKAGES += $(GDB) $(VIM) $(OPENSSH) $(SSHPASS) $(STRACE)
 endif
 
 SONIC_DOCKER_IMAGES += $(DOCKER_BASE)