config/guix/channels: Add parameter to choose whether Guix commit.

Remove obsolete no-rebuild-channnel.scm.

.config/guix/channels.scm

@@ -1,30 +1,60 @@
-(cons*
- (channel
-  (name 'nonguix)
-  (url "https://gitlab.com/nonguix/nonguix.git")
-  ;; (url "/home/ambrevar/projects/nonguix")
-  (introduction
-   (make-channel-introduction
-    "897c1a470da759236cc11798f4e0a5f7d4d59fbc"
-    (openpgp-fingerprint
-     "2A39 3FFF 68F4 EF7A 3D29  12AF 6F51 20A0 22FB B2D5")))
-  (branch "master"))
- (channel
-  (name 'guix-gaming-games)
-  (url "https://gitlab.com/guix-gaming-channels/games.git")
-  ;; (url "/home/ambrevar/projects/games")
-  (introduction
-   (make-channel-introduction
-    "c23d64f1b8cc086659f8781b27ab6c7314c5cca5"
-    (openpgp-fingerprint
-     "50F3 3E2E 5B0C 3D90 0424  ABE8 9BDC F497 A4BB CC7F")))
-  (branch "master"))
- ;; (channel
- ;;  (name 'guix-gaming-duke-nukem-3d)
- ;;  (url "https://gitlab.com/guix-gaming-channels/duke-nukem-3d.git")
- ;;  (branch "master"))
- ;; (channel
- ;;  (name 'guix-gaming-quake-3)
- ;;  (url "https://gitlab.com/guix-gaming-channels/quake-3.git")
- ;;  (branch "master"))
- %default-channels)
+(use-modules (srfi srfi-1)
+             (ice-9 textual-ports)
+             (ice-9 popen))
+
+(define (find-guix-channel channel-list)
+  (find
+   (lambda (channel) (eq? (channel-name channel) 'guix))
+   channel-list))
+
+(define current-guix (find-guix-channel %default-channels))
+
+(define (current-guix-commit)
+  (let* ((port (open-input-pipe "guix describe -f channels"))
+         (str (get-string-all port)))
+    (close-pipe port)
+    (channel-commit
+     (find-guix-channel (eval-string str)))))
+
+(define* (channel-list #:key guix-commit)
+  (cons*
+   (channel
+    (name 'nonguix)
+    (url "https://gitlab.com/nonguix/nonguix.git")
+    (introduction
+     (make-channel-introduction
+      "897c1a470da759236cc11798f4e0a5f7d4d59fbc"
+      (openpgp-fingerprint
+       "2A39 3FFF 68F4 EF7A 3D29  12AF 6F51 20A0 22FB B2D5")))
+    (branch "master"))
+   (channel
+    (name 'guix-gaming-games)
+    (url "https://gitlab.com/guix-gaming-channels/games.git")
+    ;; (url "/home/ambrevar/projects/games")
+    (introduction
+     (make-channel-introduction
+      "c23d64f1b8cc086659f8781b27ab6c7314c5cca5"
+      (openpgp-fingerprint
+       "50F3 3E2E 5B0C 3D90 0424  ABE8 9BDC F497 A4BB CC7F")))
+    (branch "master"))
+
+   ;; (channel
+   ;;  (name 'guix-gaming-duke-nukem-3d)
+   ;;  (url "https://gitlab.com/guix-gaming-channels/duke-nukem-3d.git")
+   ;;  (branch "master"))
+
+   ;; (channel
+   ;;  (name 'guix-gaming-quake-3)
+   ;;  (url "https://gitlab.com/guix-gaming-channels/quake-3.git")
+   ;;  (branch "master"))
+
+   (cons
+    (if guix-commit
+        (channel
+         (inherit current-guix)
+         (commit guix-commit))
+        current-guix)
+    (delete current-guix %default-channels))))
+
+;; (channel-list #:guix-commit (current-guix-commit))
+(channel-list)

.config/guix/no-rebuild-channel.scm

@@ -1,26 +0,0 @@
-;; Run as ‘guix pull -C FILE’.
-
-(cons*
- (channel
-  (name 'nonguix)
-  (url "https://gitlab.com/nonguix/nonguix.git")
-  (branch "master"))
- (channel
-  (name 'guix-gaming-games)
-  (url "https://gitlab.com/guix-gaming-channels/games.git")
-  (branch "master"))
- (channel
-  (name 'guix-gaming-duke-nukem-3d)
-  (url "https://gitlab.com/guix-gaming-channels/duke-nukem-3d.git")
-  (branch "master"))
- (channel
-  (name 'guix-gaming-quake-3)
-  (url "https://gitlab.com/guix-gaming-channels/quake-3.git")
-  (branch "master"))
- (list
-  (channel
-   ;; This channel can be used as an alternative to
-   ;; %default-channels to avoid rebuilding Guix on =guix pull=.
-   (inherit (car %default-channels))
-   ;; Get commit from =guix describe -f channels=.
-   (commit "338defe0cbe156e8416647035403fccf059555e0"))))