gnu: Add uniutils.

* gnu/packages/textutils.scm (uniutils): New variable.

gnu/packages/textutils.scm

@@ -45,6 +45,7 @@ (define-module (gnu packages textutils)
   #:use-module (guix build-system python)
   #:use-module (gnu packages)
   #:use-module (gnu packages autotools)
+  #:use-module (gnu packages base)
   #:use-module (gnu packages compression)
   #:use-module (gnu packages gettext)
   #:use-module (gnu packages java)
@@ -362,6 +363,68 @@ (define-public ascii2binary
    of floating point numbers, just treat the input as a sequence of unsigned
    characters.)
 
+@end itemize")
+    (license license:gpl3)))
+
+(define-public uniutils
+  (package
+    (name "uniutils")
+    (version "2.27")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "http://billposer.org/Software/Downloads/"
+                           "uniutils-" version ".tar.bz2"))
+       (sha256
+        (base32 "19w1510w87gx7n4qy3zsb0m467a4rn5scvh4ajajg7jh6x5xri08"))))
+    (build-system gnu-build-system)
+    (arguments
+     '(#:configure-flags '("--disable-dependency-tracking")
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'build 'fix-paths
+           (lambda* (#:key outputs inputs #:allow-other-keys)
+             (let ((out (assoc-ref outputs "out"))
+                   (a2b (assoc-ref inputs "ascii2binary"))
+                   (iconv (assoc-ref inputs "libiconv")))
+               (substitute* "utf8lookup"
+                 (("^ascii2binary ") (string-append a2b "/bin/ascii2binary "))
+                 (("^uniname ") (string-append out "/bin/uniname "))
+                 (("^iconv ") (string-append iconv "/bin/iconv ")))
+             #t))))))
+    (inputs
+     `(("ascii2binary" ,ascii2binary)
+       ("libiconv" ,libiconv)))
+    (home-page "https://billposer.org/Software/unidesc.html")
+    (synopsis "Find out what is in a Unicode file")
+    (description "Useful tools when working with Unicode files when one
+doesn't know the writing system, doesn't have the necessary font, needs to
+inspect invisible characters, needs to find out whether characters have been
+combined or in what order they occur, or needs statistics on which characters
+occur.
+
+@itemize
+
+@item @command{uniname} defaults to printing the character offset of each
+character, its byte offset, its hex code value, its encoding, the glyph
+itself, and its name.  It may also be used to validate UTF-8 input.
+
+@item @command{unidesc} reports the character ranges to which different
+portions of the text belong.   It can also be used to identify Unicode encodings
+(e.g. UTF-16be) flagged by magic numbers.
+
+@item @command{unihist} generates a histogram of the characters in its input.
+
+@item @command{ExplicateUTF8} is intended for debugging or for learning about
+Unicode.  It determines and explains the validity of a sequence of bytes as a
+UTF8 encoding.
+
+@item @command{utf8lookup} provides a handy way to look up Unicode characters
+from the command line.
+
+@item @command{unireverse} reverse each line of UTF-8 input
+character-by-character.
+
 @end itemize")
     (license license:gpl3)))