difftastic: add

README.org

@@ -18,6 +18,7 @@ I'll probably push what I can upstream when I figure Guix out.
 | [[https://github.com/fdw/rofimoji/][rofimoji]]                   | OK       | But I had to create setup.py myself                                        |
 | [[https://github.com/deajan/osync][osync]]                      | Works    | Requires shell commands as propagated-inputs                               |
 | [[https://github.com/jdepoix/youtube-transcript-api][youtube-transcript-api]]     | Works    | Tests fail                                                                 |
+| [[https://difftastic.wilfred.me.uk/][difftastic]]                 | Works    | Installation from binaries                                                 |
 | [[https://github.com/PaulJuliusMartinez/jless][jless]]                      | Works    | Installation from binaries                                                 |
 | [[https://github.com/latex-lsp/texlab/][texlab]]                     | Works    | Installation from binaries                                                 |
 | [[https://gohugo.io/][hugo]]                       | Works    | Installation from binaries                                                 |

difftastic-bin.scm

@@ -0,0 +1,60 @@
+(define-module (difftastic-bin)
+  #:use-module (ice-9 string-fun)
+  #:use-module (gnu packages base)
+  #:use-module (gnu packages curl)
+  #:use-module (gnu packages version-control)
+  #:use-module (gnu packages xorg)
+  #:use-module (gnu packages tls)
+  #:use-module (gnu packages compression)
+  #:use-module (gnu packages gcc)
+  #:use-module (guix download)
+  #:use-module (guix packages)
+  #:use-module ((guix licenses) #:prefix license:)
+  #:use-module (nonguix build-system binary))
+
+(define libstdc++
+  ;; Libstdc++ matching the default GCC.
+  (make-libstdc++ gcc))
+
+(define-public difftastic-bin
+  (package
+   (name "difftastic-bin")
+   (version "0.53.1")
+   (source
+    (origin
+     (method url-fetch)
+     (uri (string-append
+           "https://github.com/Wilfred/difftastic/releases/download/" version "/"
+           "difft-x86_64-unknown-linux-gnu.tar.gz"))
+     (sha256
+      (base32
+       "08hx8ljm67zjmnz3mrhisgzqiz5fnd856jqgsppl2i7x4vgzw9by"))))
+   (build-system binary-build-system)
+   (arguments
+    `(#:phases
+      (modify-phases %standard-phases
+                     (replace 'unpack
+                              (lambda* (#:key inputs #:allow-other-keys)
+                                (mkdir-p "difft")
+                                (invoke "tar" "xvzf" (assoc-ref inputs "source") "-C" "difft"))))
+      #:install-plan
+      `(("difft" "/bin/"))
+      #:patchelf-plan
+      `(("difft/difft" ("glibc" "libgccjit" "libstdc++")))))
+   (inputs
+    `(("curl" ,curl)
+      ("libgccjit" ,libgccjit)
+      ("libstdc++" ,libstdc++)
+      ("glibc" ,glibc)
+      ("zlib" ,zlib)))
+   (synopsis "Difftastic is a structural diff tool that compares files based on their syntax.")
+   (description "Difftastic is a CLI diff tool that compares files based on their syntax, not line-by-line. Difftastic produces accurate diffs that are easier for humans to read.
+
+@itemize
+@item Understand what actually changed. Difftastic parses your code with tree-sitter. Unlike a line-oriented text diff, difftastic understands that the inner expression hasn't changed here.
+@item Ignore formatting changes. Has your code formatter decided to split something over multiple lines? Difftastic can show what has actually changed.
+@item Visualise wrapping changes. Have you added a wrapper? Difftastic can match the delimiters exactly.
+@item Real line numbers. Do you know how to read @@ -5,6 +5,7 @@ syntax? Difftastic shows the actual line numbers from your files, both before and after.
+@end itemize")
+   (home-page "https://difftastic.wilfred.me.uk/")
+   (license license:expat)))