[nongnu] elpa/nix-mode 429a92a59e 225/500: Group configs in nix-shell

[ELPA Syncer]

branch: elpa/nix-mode
commit 429a92a59e362487b3cc41c41daf09ab337e5571
Author: Matthew Bauer <matthew.bauer@obsidian.systems>
Commit: Matthew Bauer <matthew.bauer@obsidian.systems>

    Group configs in nix-shell
---
 nix-shell.el | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/nix-shell.el b/nix-shell.el
index 2f6bba85ab..349a287adc 100644
--- a/nix-shell.el
+++ b/nix-shell.el
@@ -18,11 +18,16 @@
 
 (require 'nix)
 (require 'nix-instantiate)
+(require 'nix-store)
+
+(defgroup nix-shell nil
+  "All nix-shell options."
+  :group 'nix)
 
 (defcustom nix-shell-file nil
   "Set to the file to run the nix-shell for."
   :type 'string
-  :group 'nix)
+  :group 'nix-shell)
 
 (defcustom nix-shell-inputs '(depsBuildBuild
                              depsBuildBuildPropagated
@@ -32,13 +37,18 @@
                              depsBuildTargetPropagated)
   "List of inputs to collect for nix-shell."
   :type 'list
-  :group 'nix)
+  :group 'nix-shell)
 
 (defcustom nix-shell-clear-environment nil
   "Whether to clear the old ‘exec-path’ & environment.
 Similar to ‘--pure’ argument in command line nix-shell."
   :type 'boolean
-  :group 'nix)
+  :group 'nix-shell)
+
+(defcustom nix-shell-auto-realise t
+  "Whether we can realise paths in the built .drv file."
+  :type 'boolean
+  :group 'nix-shell)
 
 (defun nix-shell--callback (buffer drv)
   "Run the nix-shell callback to setup the buffer.
@@ -62,7 +72,7 @@ The DRV file to use."
     ;; Make sure this .drv file can actually be built here.
     (unless (string= system (nix-system))
       (error
-       "Your system (%s) does not match the target system (%s)"
+       "Your system (%s) does not match .drv’s build system (%s)"
        (nix-system) system))
 
     (with-current-buffer buffer
@@ -73,7 +83,9 @@ The DRV file to use."
        )
 
       (dolist (input inputs)
-       (unless (file-directory-p input) (nix-store-realise input))
+       (when (and (not (file-directory-p input))
+                  nix-shell-auto-realise)
+         (nix-store-realise input))
 
        (let ((bin (expand-file-name "bin" input))
              (man (expand-file-name "share/man" input))