web-wasm: Bump Emscripten to 1.38.24

Use Debian stretch packaged gosu, as recommended in the documentation:

  https://github.com/tianon/gosu/blob/master/INSTALL.md

to avoid GPG key issues.

web-wasm/Dockerfile.in

@@ -5,7 +5,54 @@ MAINTAINER Matt McCormick "matt.mccormick@kitware.com"
 # See https://github.com/asRIA/emscripten-docker/blob/master/Dockerfile.in#L4
 RUN rm /bin/sh && ln -s /bin/dash /bin/sh
 
-#include "common.debian"
+COPY install-gosu-sudo.sh /buildscripts/
+
+ARG DEBIAN_FRONTEND=noninteractive
+ARG REPO=http://cdn-fastly.deb.debian.org
+
+RUN \
+  bash -c "echo \"deb $REPO/debian stretch main contrib non-free\" > /etc/apt/sources.list"  && \
+  bash -c "echo \"deb $REPO/debian stretch-updates main contrib non-free\" >> /etc/apt/sources.list"  && \
+  bash -c "echo \"deb $REPO/debian-security stretch/updates main\" >> /etc/apt/sources.list" && \
+  bash -c "echo \"deb http://ftp.debian.org/debian stretch-backports main\" >> /etc/apt/sources.list" && \
+  apt-get update --yes && \
+  apt-get install --no-install-recommends --yes \
+    automake \
+    autogen \
+    bash \
+    build-essential \
+    bc \
+    bzip2 \
+    ca-certificates \
+    curl \
+    dirmngr \
+    file \
+    gettext \
+    gnupg2 \
+    gosu \
+    gzip \
+    zip \
+    make \
+    ncurses-dev \
+    pkg-config \
+    libtool \
+    python \
+    python-pip \
+    rsync \
+    sed \
+    ssh \
+    bison \
+    flex \
+    tar \
+    pax \
+    vim \
+    wget \
+    xz-utils \
+    zlib1g-dev \
+  && \
+  apt-get clean --yes && \
+  /buildscripts/install-gosu-sudo.sh && \
+  rm -rf /buildscripts
 
 #include "common.docker"
 

web-wasm/install-gosu-sudo.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+
+# verify that the binary works
+gosu nobody true
+
+
+cat << EOF >> /usr/bin/sudo
+#!/bin/sh
+
+# Emulate the sudo command
+
+exec gosu root:root "\$@"
+
+EOF
+
+chmod +x /usr/bin/sudo