guix system: Rename 'dmd-graph' to 'shepherd-graph'.

* doc/images/dmd-graph.dot: Rename to...
* doc/images/shepherd-graph.dot: ... this.
* doc.am (DOT_FILES): Adjust accordingly.
* guix/scripts/system.scm (dmd-service-node-label)
  (dmd-service-node-type, export-dmd-graph): Rename to...
  (shepherd-service-node-label, shepherd-service-node-type)
  (export-shepherd-graph): ... this.
  (show-help, process-action, process-command): Rename 'dmd-graph' to
  'shepherd-graph'.
* emacs/guix-command.el (guix-command-additional-execute-arguments)
  (guix-command-special-executors): Likewise.
* doc/guix.texi: Likewise.
* doc/emacs.texi (Emacs Popup Interface): Likewise.

doc.am

@@ -26,7 +26,7 @@ DOT_FILES =					\
   doc/images/coreutils-graph.dot		\
   doc/images/coreutils-bag-graph.dot		\
   doc/images/service-graph.dot			\
-  doc/images/dmd-graph.dot
+  doc/images/shepherd-graph.dot
 
 DOT_VECTOR_GRAPHICS =				\
   $(DOT_FILES:%.dot=%.eps)			\

doc/emacs.texi

@@ -578,7 +578,7 @@ GNU Emacs Manual}).
 
 @end itemize
 
-Several commands (@command{guix graph}, @command{guix system dmd-graph}
+Several commands (@command{guix graph}, @command{guix system shepherd-graph}
 and @command{guix system extension-graph}) also have a ``View graph''
 action, which allows you to view a generated graph using @command{dot}
 command (specified by @code{guix-dot-program} variable).  By default a

doc/guix.texi

@@ -9348,8 +9348,8 @@ $ guix system extension-graph @var{file} | dot -Tpdf > services.pdf
 
 produces a PDF file showing the extension relations among services.
 
-@anchor{system-dmd-graph}
+@anchor{system-shepherd-graph}
-@item dmd-graph
+@item shepherd-graph
 Emit in Dot/Graphviz format to standard output the @dfn{dependency
 graph} of shepherd services of the operating system defined in
 @var{file}.  @xref{Shepherd Services}, for more information and for an
@@ -9795,11 +9795,11 @@ started, which in turn can only happen once all the file systems have
 been mounted.  The simple operating system defined earlier (@pxref{Using
 the Configuration System}) results in a service graph like this:
 
-@image{images/dmd-graph,,5in,Typical dmd service graph.}
+@image{images/shepherd-graph,,5in,Typical shepherd service graph.}
 
 You can actually generate such a graph for any operating system
-definition using the @command{guix system dmd-graph} command
+definition using the @command{guix system shepherd-graph} command
-(@pxref{system-dmd-graph, @command{guix system dmd-graph}}).
+(@pxref{system-shepherd-graph, @command{guix system shepherd-graph}}).
 
 The @var{%shepherd-root-service} is a service object representing
 PID@tie{}1, of type @var{shepherd-root-service-type}; it can be extended

doc/images/shepherd-graph.dot

@@ -1,4 +1,4 @@
-digraph "Guix dmd-service" {
+digraph "Guix shepherd-service" {
   "user-file-systems" [label = "user-file-systems", shape = box, fontname = Helvetica];
   "user-processes" -> "user-file-systems" [color = red];
   "user-processes" [label = "user-processes", shape = box, fontname = Helvetica];

emacs/guix-command.el

@@ -620,7 +620,7 @@ command."
       (("size")
        ,(guix-command-make-argument
          :name "view" :char ?v :doc "View map"))
-      (("system" "dmd-graph") ,graph-arg)
+      (("system" "shepherd-graph") ,graph-arg)
       (("system" "extension-graph") ,graph-arg)))
   "Alist of guix commands and additional 'execute' action arguments.")
 
@@ -646,7 +646,7 @@ command."
      ("view" . guix-run-view-graph))
     (("size")
      ("view" . guix-run-view-size-map))
-    (("system" "dmd-graph")
+    (("system" "shepherd-graph")
      ("view" . guix-run-view-graph))
     (("system" "extension-graph")
      ("view" . guix-run-view-graph)))

guix/scripts/system.scm

@@ -312,17 +312,17 @@ (define (service-node-type services)
    (label service-node-label)
    (edges (lift1 (service-back-edges services) %store-monad))))
 
-(define (dmd-service-node-label service)
+(define (shepherd-service-node-label service)
   "Return a label for a node representing a <shepherd-service>."
   (string-join (map symbol->string (shepherd-service-provision service))))
 
-(define (dmd-service-node-type services)
+(define (shepherd-service-node-type services)
   "Return a node type for SERVICES, a list of <shepherd-service>."
   (node-type
-   (name "dmd-service")
+   (name "shepherd-service")
-   (description "the dependency graph of dmd services")
+   (description "the dependency graph of shepherd services")
-   (identifier (lift1 dmd-service-node-label %store-monad))
+   (identifier (lift1 shepherd-service-node-label %store-monad))
-   (label dmd-service-node-label)
+   (label shepherd-service-node-label)
    (edges (lift1 (shepherd-service-back-edges services) %store-monad))))
 
 
@@ -474,7 +474,7 @@ (define (export-extension-graph os port)
                   #:node-type (service-node-type services)
                   #:reverse-edges? #t)))
 
-(define (export-dmd-graph os port)
+(define (export-shepherd-graph os port)
   "Export the graph of shepherd services of OS to PORT."
   (let* ((services  (operating-system-services os))
          (pid1      (fold-services services
@@ -484,7 +484,7 @@ (define (export-dmd-graph os port)
                               (null? (shepherd-service-requirement service)))
                             shepherds)))
     (export-graph sinks (current-output-port)
-                  #:node-type (dmd-service-node-type dmds)
+                  #:node-type (shepherd-service-node-type shepherds)
                   #:reverse-edges? #t)))
 
 
@@ -517,7 +517,7 @@ (define (show-help)
   (display (_ "\
    extension-graph  emit the service extension graph in Dot format\n"))
   (display (_ "\
-   dmd-graph        emit the graph of dmd services in Dot format\n"))
+   shepherd-graph   emit the graph of shepherd services in Dot format\n"))
 
   (show-build-options-help)
   (display (_ "
@@ -637,8 +637,8 @@ (define (process-action action args opts)
           (case action
             ((extension-graph)
              (export-extension-graph os (current-output-port)))
-            ((dmd-graph)
+            ((shepherd-graph)
-             (export-dmd-graph os (current-output-port)))
+             (export-shepherd-graph os (current-output-port)))
             (else
              (perform-action action os
                              #:dry-run? dry?
@@ -678,7 +678,7 @@ (define (parse-sub-command arg result)
         (let ((action (string->symbol arg)))
           (case action
             ((build container vm vm-image disk-image reconfigure init
-              extension-graph dmd-graph list-generations)
+              extension-graph shepherd-graph list-generations)
              (alist-cons 'action action result))
             (else (leave (_ "~a: unknown action~%") action))))))