*: do not require env.sh
This removes the need to source env.{sh,fish} when working with hscloud.
This is done by:
1. Implementing a Go library to reliably detect the location of the
active hscloud checkout. That in turn is enabled by
BUILD_WORKSPACE_DIRECTORY being now a thing in Bazel.
2. Creating a tool `hscloud`, with a command `hscloud workspace` that
returns the workspace path.
3. Wrapping this tool to be accessible from Python and Bash.
4. Bumping all users of hscloud_root to use either the Go library or
one of the two implemented wrappers.
We also drive-by replace tools/install.sh to be a proper sh_binary, and
make it yell at people if it isn't being ran as `bazel run
//tools:install`.
Finally, we also drive-by delete cluster/tools/nixops.sh which was never used.
Change-Id: I7873714319bfc38bbb930b05baa605c5aa36470a
Reviewed-on: https://gerrit.hackerspace.pl/c/hscloud/+/1169
Reviewed-by: informatic <informatic@hackerspace.pl>
diff --git a/go/workspace/BUILD.bazel b/go/workspace/BUILD.bazel
new file mode 100644
index 0000000..34f8acc
--- /dev/null
+++ b/go/workspace/BUILD.bazel
@@ -0,0 +1,8 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+ name = "go_default_library",
+ srcs = ["workspace.go"],
+ importpath = "code.hackerspace.pl/hscloud/go/workspace",
+ visibility = ["//visibility:public"],
+)