Remove bash

This requires to install ncurses explicitly, which was installed as a
dep for bash before, and Vim requires it.

Ref: Vimjas#20 (comment)

Dockerfile

@@ -1,9 +1,6 @@
 FROM alpine:3.5
 
-RUN apk --update add bash \
-  && rm -rf /var/cache/apk/* /tmp/* /var/tmp/*
-
-RUN adduser -h /home -s /bin/bash -D -u 8465 vimtest
+RUN adduser -h /home -s /bin/sh -D -u 8465 vimtest
 
 RUN mkdir -p /vim /vim-build/bin /plugins
 RUN chown vimtest:vimtest /home /plugins

scripts/argecho.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 echo "Running as: $(whoami)"
 

scripts/install_vim.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 set -e
 
@@ -20,6 +20,8 @@ build() {
   [ -z $NAME ] && NAME="vim-${TAG}"
   [ -z $TAG ] && bail "-tag is required"
 
+  apk add ncurses
+
   VIM_NAME="vim_${TAG}_py${PYTHON}_rb${RUBY}_lua${LUA}"
   VIM_PATH="/vim-build/$VIM_NAME"
   VIM_BIN="$VIM_PATH/bin/vim"

scripts/run_vim.sh

@@ -1,10 +1,10 @@
-#!/bin/bash
+#!/bin/sh
 
 BIN=$1
 shift
 
-if [ "$BIN" == "bash" ] || [ -z "$BIN" ]; then
-  exec /bin/bash
+if [ "$BIN" = "sh" ] || [ -z "$BIN" ]; then
+  exec /bin/sh
 fi
 if ! [ -x "/vim-build/bin/$BIN" ]; then
   exec "$BIN" "$@"