user/spack: relocate default configuration. fixes #1108.

Switching to a file-based (as opposed to patch-based)
configuration will be easier for us to maintain. Note
that '/opt/spack/etc/spack/config.yaml' will override
values in '/etc/spack/config.yaml'.

Also:

  * change upstream spack.git provider; fixes spack#8,
    which gives users immediate access to our patches
    if they wish to set up a separate Spack tree

1 files changed, 22 insertions, 0 deletions

diff --git a/user/spack/config.yaml b/user/spack/config.yaml
new file mode 100644
index 000000000..c7ffefb41
--- /dev/null
+++ b/user/spack/config.yaml
@@ -0,0 +1,22 @@
+# -------------------------------------------------------------------------
+# This is the Adélie spack configuration file.
+#
+# Settings here are versioned with Adélie and are intended to provide
+# sensible defaults out of the box. Adélie maintainers should edit this
+# file to keep it current.
+#
+# Users can override these settings by editing the following files.
+#
+# Per-spack-instance settings (overrides defaults):
+#   /opt/spack/etc/spack/config.yaml
+#
+# Per-user settings (overrides default and site settings):
+#   ~/.spack/config.yaml
+# -------------------------------------------------------------------------
+
+config:
+
+  install_tree:
+    root: $user_cache_path
+
+  source_cache: $user_cache_path/cache