gnu: Add rust-sloggers-1.

* gnu/packages/crates-io.scm (rust-sloggers-1): New variable.

gnu/packages/crates-io.scm

@@ -33718,6 +33718,43 @@ (define-public rust-slog-term-2
      "This package provides the Unix terminal drain and formatter for slog.")
     (license (list license:mpl2.0 license:expat license:asl2.0))))
 
+(define-public rust-sloggers-1
+  (package
+    (name "rust-sloggers")
+    (version "1.0.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "sloggers" version))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32 "0sbdflswmivykx5sx1f2hip905lvcgi733d0ry879wx6g983f7gh"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:skip-build? #t
+       #:cargo-inputs
+       (("rust-chrono" ,rust-chrono-0.4)
+        ("rust-libflate" ,rust-libflate-1)
+        ("rust-regex" ,rust-regex-1)
+        ("rust-serde" ,rust-serde-1)
+        ("rust-slog" ,rust-slog-2)
+        ("rust-slog-async" ,rust-slog-async-2)
+        ("rust-slog-kvfilter" ,rust-slog-kvfilter-0.7)
+        ("rust-slog-scope" ,rust-slog-scope-4)
+        ("rust-slog-stdlog" ,rust-slog-stdlog-4)
+        ("rust-slog-term" ,rust-slog-term-2)
+        ("rust-trackable" ,rust-trackable-1))
+       #:cargo-development-inputs
+       (("rust-clap" ,rust-clap-2)
+        ("rust-serdeconv" ,rust-serdeconv-0.4)
+        ("rust-tempfile" ,rust-tempfile-3))))
+    (home-page "https://github.com/sile/sloggers")
+    (synopsis "Frequently used slog loggers and convenient functions")
+    (description
+     "This library provides frequently used slog loggers and convenient
+functions.")
+    (license license:expat)))
+
 (define-public rust-slug-0.1
   (package
     (name "rust-slug")