read_config_file(): Update to get the config from `config.toml`

Use XDG handling from `state_load_map_group()` to do basically the same
thing here for reading the config from a `config.toml` file.

Use 'error-chain' to handle the `Result`s more easily. No more nested
pattern matching, we'll just have to unwrap one `Result` and write the
error to stderr in an FFI function.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/errors.rs b/src/errors.rs
new file mode 100644
index 0000000..beafc9f
--- /dev/null
+++ b/src/errors.rs
@@ -0,0 +1,7 @@
+use xdg;
+
+error_chain! {
+    foreign_links {
+        Xdg(xdg::BaseDirectoriesError);
+    }
+}