repo2docker/docker/entrypoint

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#!/bin/sh
set -e
function write_config() {
# Checks for the environment variables *_PROXY.
# If at least one variables is found, it writes all found variables
# into a docker config file
docker_cfg="$1"
httpProxy="${HTTP_PROXY:-$http_proxy}"
httpsProxy="${HTTPS_PROXY:-$https_proxy}"
noProxy="${NO_PROXY:-$no_proxy}"
# If no proxy vars are set, do nothing
[ -z "$httpProxy" ] && [ -z "$httpsProxy" ] && [ -z "$noProxy" ] && return
[ -f "$1" ] && echo "$1 already exists. Not touching it. You are responsible for setting your proxy vars there yourself" >&2 && return
sep=""
mkdir -p "$(dirname $docker_cfg)"
cat <<EOF > "$docker_cfg"
{
"proxies": {
"default": {
EOF
[ -n "$httpProxy" ] && echo -ne "$sep"' "httpProxy": "'"$httpProxy"'"' >> "$docker_cfg" && sep=",\n"
[ -n "$httpsProxy" ] && echo -ne "$sep"' "httpsProxy": "'"$httpsProxy"'"' >> "$docker_cfg" && sep=",\n"
[ -n "$noProxy" ] && echo -ne "$sep"' "noProxy": "'"$noProxy"'"' >> "$docker_cfg" && sep=",\n"
cat <<EOF >> "$docker_cfg"
}
}
}
EOF
}
write_config /root/.docker/config.json
exec "$@"