Install and use bash that support process substitution

claudyus · Sep 12, 2017 · 7557862 · 7557862
1 parent 691a843
commit 7557862
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diff --git a/Dockerfile b/Dockerfile
@@ -1,6 +1,6 @@
 FROM alpine:latest
 
-RUN apk add --update openssh-client git && rm -rf /var/cache/apk/*
+RUN apk add --update bash openssh-client git && rm -rf /var/cache/apk/*
 
 COPY config.sh /ssh/config.sh
 

diff --git a/config.sh b/config.sh
@@ -1,12 +1,12 @@
-#!/bin/sh
+#!/bin/bash
 
 eval $(ssh-agent -s)
 
 ssh-add <(echo $SSH_PRIVATE_KEY)
 
 # set or ignore know_hosts file
 mkdir -p ~/.ssh
-if [ $KNOW_HOSTS_LINE ]; then
+if [[ -n "$KNOW_HOSTS_LINE" ]]; then
   echo $KNOW_HOSTS_LINE > ~/.ssh/known_hosts
 else
   echo "WARNING: host key checking disabled (NOTE: makes you susceptible to man-in-the-middle attacks)"