[librsvg-oci-images] Sync the rustc template dockerfile

[Jordan Petridis <jpetridis src gnome org>]

commit ac6ae676f137702feb263aa33994e4bc5939374a
Author: Jordan Petridis <jpetridis gnome org>
Date:   Sun Sep 2 15:56:20 2018 +0300

    Sync the rustc template dockerfile

 rustc/rustc_template | 46 ++++++++++++++++++++++++++--------------------
 1 file changed, 26 insertions(+), 20 deletions(-)
---
diff --git a/rustc/rustc_template b/rustc/rustc_template
index 31b0b44..f27f218 100644
--- a/rustc/rustc_template
+++ b/rustc/rustc_template
@@ -1,32 +1,36 @@
-FROM debian:testing
+FROM debian:testing-slim
 
+# Librsvg deps
 RUN apt update -yqq && apt upgrade -yqq && \
     apt install -yqq --no-install-recommends \
-    gcc make valac curl libpango1.0-dev \
+    gcc make vala curl \
     automake autoconf libtool gettext itstool \
     libgdk-pixbuf2.0-dev libgirepository1.0-dev \
-    gtk-doc-tools git libgtk-3-dev ccache \
-    libxml2-dev libcroco3-dev libcairo2-dev \
-    ca-certificates gcc libc6-dev wget
+    gtk-doc-tools git libgtk-3-dev libxml2-dev \
+    libcroco3-dev libcairo2-dev libpango1.0-dev
 
-# Kepp in sync with https://github.com/rust-lang-nursery/docker-rust
 ENV RUSTUP_HOME=/usr/local/rustup \
     CARGO_HOME=/usr/local/cargo \
     PATH=/usr/local/cargo/bin:$PATH
 
+# Kepp in sync with https://github.com/rust-lang-nursery/docker-rust
 RUN set -eux; \
-    \
-# this "case" statement is generated via "update.sh"
+    apt-get update; \
+    apt-get install -y --no-install-recommends \
+        ca-certificates \
+        gcc \
+        libc6-dev \
+        wget \
+        ; \
     dpkgArch="$(dpkg --print-architecture)"; \
-       case "${dpkgArch##*-}" in \
-               amd64) rustArch='x86_64-unknown-linux-gnu'; 
rustupSha256='c9837990bce0faab4f6f52604311a19bb8d2cde989bea6a7b605c8e526db6f02' ;; \
-               armhf) rustArch='armv7-unknown-linux-gnueabihf'; 
rustupSha256='297661e121048db3906f8c964999f765b4f6848632c0c2cfb6a1e93d99440732' ;; \
-               arm64) rustArch='aarch64-unknown-linux-gnu'; 
rustupSha256='a68ac2d400409f485cb22756f0b3217b95449884e1ea6fd9b70522b3c0a929b2' ;; \
-               i386) rustArch='i686-unknown-linux-gnu'; 
rustupSha256='27e6109c7b537b92a6c2d45ac941d959606ca26ec501d86085d651892a55d849' ;; \
-               *) echo >&2 "unsupported architecture: ${dpkgArch}"; exit 1 ;; \
-       esac; \
-    \
-    url="https://static.rust-lang.org/rustup/archive/1.11.0/${rustArch}/rustup-init";; \
+    case "${dpkgArch##*-}" in \
+        amd64) rustArch='x86_64-unknown-linux-gnu'; 
rustupSha256='f69dafcca62fe70d7882113e21bb96a2cbdf4fc4636d25337d6de9191bdec8da' ;; \
+        armhf) rustArch='armv7-unknown-linux-gnueabihf'; 
rustupSha256='eee969b9fd128e8dc9b4ec44acde46735cf8e612d06495e9d022517849aba2d6' ;; \
+        arm64) rustArch='aarch64-unknown-linux-gnu'; 
rustupSha256='cdc48b7882582fd8475107a406dd86df85c7d72e5deea99ff8940c8e11531285' ;; \
+        i386) rustArch='i686-unknown-linux-gnu'; 
rustupSha256='3bad3945452509ac28ba4113e198323daab57488d6885bb31ac30c9eecd88825' ;; \
+        *) echo >&2 "unsupported architecture: ${dpkgArch}"; exit 1 ;; \
+    esac; \
+    url="https://static.rust-lang.org/rustup/archive/1.13.0/${rustArch}/rustup-init";; \
     wget "$url"; \
     echo "${rustupSha256} *rustup-init" | sha256sum -c -; \
     chmod +x rustup-init; \
@@ -35,6 +39,8 @@ RUN set -eux; \
     chmod -R a+w $RUSTUP_HOME $CARGO_HOME; \
     rustup --version; \
     cargo --version; \
-    rustc --version;
-
-RUN apt clean && rm -rf /var/lib/apt/lists
\ No newline at end of file
+    rustc --version; \
+    apt-get remove -y --auto-remove \
+        wget \
+        ; \
+    rm -rf /var/lib/apt/lists/*;