gnu: Add nsncd.

* gnu/packages/rust-apps.scm (nsncd): New variable.

Change-Id: I2f2fe769321dcfa1043b2427b474bf615eb22091

gnu/packages/rust-apps.scm

@@ -1502,6 +1502,51 @@ is being designed to work with Podman but is also applicable for other OCI
 container management applications.")
     (license license:asl2.0)))
 
+(define-public nsncd
+  (package
+    (name "nsncd")
+    (version "1.4.1")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+              (url "https://github.com/twosigma/nsncd")
+              (commit (string-append "v" version))))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32 "03z0fkdp959laa21839y6wz00rg25zvxvr14i1ailj7nkwhysdcx"))
+       (modules '((guix build utils)))
+       (snippet
+        '(begin (substitute* (find-files "." "^Cargo\\.toml$")
+                  (("\"~([[:digit:]]+(\\.[[:digit:]]+)*)" _ version)
+                   (string-append "\"^" version)))))))
+    (build-system cargo-build-system)
+    (arguments
+     (list
+      #:cargo-inputs `(("rust-anyhow" ,rust-anyhow-1)
+                       ("rust-atoi" ,rust-atoi-0.4)
+                       ("rust-slog" ,rust-slog-2)
+                       ("rust-slog-async" ,rust-slog-async-2)
+                       ("rust-slog-term" ,rust-slog-term-2)
+                       ("rust-crossbeam-channel" ,rust-crossbeam-channel-0.5)
+                       ("rust-nix" ,rust-nix-0.21)
+                       ("rust-num-derive" ,rust-num-derive-0.3)
+                       ("rust-num-traits" ,rust-num-traits-0.2)
+                       ("rust-sd-notify" ,rust-sd-notify-0.3)
+                       ("rust-once-cell" ,rust-once-cell-1)
+                       ("rust-static-assertions" ,rust-static-assertions-1))
+      #:cargo-development-inputs `(("rust-criterion" ,rust-criterion-0.3)
+                                   ("rust-temp-env" ,rust-temp-env-0.3))
+      #:install-source? #f))
+    (home-page "https://github.com/twosigma/nsncd")
+    (synopsis "Name service non-caching daemon")
+    (description
+     "Nsncd implements the @acronym{NSCD, name-service caching daemon} protocol
+to provide out-of-process NSS lookups but does not implement caching.  It is
+designed to provide high-performance NSS lookups for programs that are not using
+the system libc, while providing semantics as if NSCD were not being used.")
+    (license license:asl2.0)))
+
 (define-public ripgrep
   (package
     (name "ripgrep")