guix: swap moreutils for just sponge

We build the only moreutils utility we actually need (sponge), have less
unused stuff in the Guix environment, and, the dependency graph is
simplified. i.e we no-longer have a dependency on perl, docbook etc, for
this package.

contrib/guix/manifest.scm

@@ -13,22 +13,22 @@
              ((gnu packages linux) #:select (linux-libre-headers-6.1))
              (gnu packages llvm)
              (gnu packages mingw)
-             (gnu packages moreutils)
              (gnu packages pkg-config)
              ((gnu packages python) #:select (python-minimal))
              ((gnu packages python-build) #:select (python-tomli))
              ((gnu packages python-crypto) #:select (python-asn1crypto))
              ((gnu packages tls) #:select (openssl))
              ((gnu packages version-control) #:select (git-minimal))
              (guix build-system cmake)
+             (guix build-system gnu)
              (guix build-system python)
              (guix build-system trivial)
              (guix download)
              (guix gexp)
              (guix git-download)
              ((guix licenses) #:prefix license:)
              (guix packages)
-             ((guix utils) #:select (substitute-keyword-arguments)))
+             ((guix utils) #:select (cc-for-target substitute-keyword-arguments)))
 
 (define-syntax-rule (search-our-patches file-name ...)
   "Return the list of absolute file names corresponding to each
@@ -487,6 +487,36 @@ inspecting signatures in Mach-O binaries.")
                    (("^install-others =.*$")
                     (string-append "install-others = " out "/etc/rpc\n")))))))))))))
 
+;; The sponge tool from moreutils.
+(define-public sponge
+  (package
+    (name "sponge")
+    (version "0.69")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append
+                    "https://git.joeyh.name/index.cgi/moreutils.git/snapshot/
+                    moreutils-" version ".tar.gz"))
+              (file-name (string-append "moreutils-" version ".tar.gz"))
+              (sha256
+               (base32
+                "1l859qnzccslvxlh5ghn863bkq2vgmqgnik6jr21b9kc6ljmsy8g"))))
+    (build-system gnu-build-system)
+    (arguments
+     (list #:phases
+           #~(modify-phases %standard-phases
+               (delete 'configure)
+               (replace 'install
+                (lambda* (#:key outputs #:allow-other-keys)
+                  (let ((bin (string-append (assoc-ref outputs "out") "/bin")))
+                  (install-file "sponge" bin)))))
+           #:make-flags
+           #~(list "sponge" (string-append "CC=" #$(cc-for-target)))))
+    (home-page "https://joeyh.name/code/moreutils/")
+    (synopsis "Miscellaneous general-purpose command-line tools")
+    (description "Just sponge")
+    (license license:gpl2+)))
+
 (packages->manifest
  (append
   (list ;; The Basics
@@ -502,7 +532,7 @@ inspecting signatures in Mach-O binaries.")
         patch
         gawk
         sed
-        moreutils
+        sponge
         ;; Compression and archiving
         tar
         gzip