From a93a63a6b7e3d119d488534c3e8573ba6d87cbd8 Mon Sep 17 00:00:00 2001
From: Andre Richter <andre.o.richter@gmail.com>
Date: Tue, 29 Aug 2017 18:08:52 +0200
Subject: [PATCH] Docker: Cache cargo downloads with named volume

Currently, cargo downloads dependencies on every single run.
Get rid of this overhead by caching /home/user/.cargo in a
named volume.
---
 docker/README.md | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/docker/README.md b/docker/README.md
index e24f7c0..4d9ad93 100644
--- a/docker/README.md
+++ b/docker/README.md
@@ -38,6 +38,7 @@ git pull --rebase --recurse-submodules && git submodule sync \
 ```shell
 docker run --cap-add MKNOD --cap-add SYS_ADMIN --device /dev/fuse \
     -e LOCAL_UID="$(id -u)" -e LOCAL_GID="$(id -g)" \
+    -v redox-"$(id -u)"-"$(id -g)"-cargo:/home/user/.cargo \
     -v "$(pwd):/home/user/src" --rm redox make fetch all
 ```
 #### Linux with security modules<br>
@@ -51,11 +52,24 @@ Ex.: for a SELinux only system such as Fedora or CentOS
 ```shell
 docker run --cap-add MKNOD --cap-add SYS_ADMIN --device /dev/fuse \
     -e LOCAL_UID="$(id -u)" -e LOCAL_GID="$(id -g)" \
-     --security-opt label=disable \
+    --security-opt label=disable \
+    -v redox-"$(id -u)"-"$(id -g)"-cargo:/home/user/.cargo \
     -v "$(pwd):/home/user/src" --rm redox make fetch all
 ```
 #### MacOS
 ```shell
 docker run --cap-add MKNOD --cap-add SYS_ADMIN --device /dev/fuse \
+    -v redox-cargo:/home/user/.cargo \
     -v "$(pwd):/home/user/src" --rm redox make fetch all
 ```
+
+### Clear the named volume containing the cargo cache
+#### Linux
+```shell
+docker volume rm redox-"$(id -u)"-"$(id -g)"-cargo
+```
+
+#### MacOS
+```shell
+docker volume rm redox-cargo
+```