gnu: Add emacs-execline.

* gnu/packages/emacs-xyz.scm (emacs-execline): New variable.

gnu/packages/emacs-xyz.scm

@@ -24771,6 +24771,45 @@ (define-public emacs-plantuml-mode
 or region and use of locally installed binaries.")
     (license license:gpl3+)))
 
+(define-public emacs-execline
+  (let ((commit "c75dd9b2c54d8e59fc35fd4bd98d8e213948a3f5")
+        (revision "1"))
+    (package
+      (name "emacs-execline")
+      (version (git-version "0.1" revision commit))
+      (source (origin
+                (method git-fetch)
+                (uri (git-reference
+                      (url "https://gitlab.com/KAction/emacs-execline/")
+                      (commit commit)))
+                (file-name (git-file-name name version))
+                (sha256
+                 (base32
+                  "02q531c9wvdwflhggflnci4a36h2bb90bq25bbhw6i2lvrd9sk55"))))
+      (build-system emacs-build-system)
+      (propagated-inputs
+       `(("emacs-s" ,emacs-s)))
+      (arguments
+       `(#:tests? #t
+         #:test-command '("emacs" "-Q" "-batch" "-L" "."
+                          "-l" "t/indent.el"
+                          "-f" "ert-run-tests-batch-and-exit")))
+      (home-page "https://gitlab.com/KAction/emacs-execline/")
+      (synopsis "Major Emacs mode for editing execline scripts")
+      (description
+       "This package provides a major mode for editing execline scripts.
+
+Features:
+@itemize
+@item Syntax highlighting of commends, builtin commands and variable substitution.
+@item Completion of builtin commands.
+@item Working @code{comment-region} command.
+@item Indentation of blocks.
+@item Automatic enable of mode in @file{*.exec} files.
+@item Automatic enable of mode in files with @code{execlineb} interpreter.
+@end itemize\n")
+      (license license:gpl3+))))
+
 (define-public emacs-shell-pop
   (let ((commit "4b4394037940a890a313d715d203d9ead2d156a6")
         (revision "0"))