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-rw-r--r--doc/guix.texi7
-rw-r--r--guix/graph.scm10
-rw-r--r--guix/scripts/graph.scm36
3 files changed, 51 insertions, 2 deletions
diff --git a/doc/guix.texi b/doc/guix.texi
index a5424b4e01..83f52484e6 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -5827,6 +5827,13 @@ the values listed above.
@item --list-types
List the supported graph types.
+@item --backend=@var{backend}
+@itemx -b @var{backend}
+Produce a graph using the selected @var{backend}.
+
+@item --list-backends
+List the supported graph backends.
+
@item --expression=@var{expr}
@itemx -e @var{expr}
Consider the package @var{expr} evaluates to.
diff --git a/guix/graph.scm b/guix/graph.scm
index 5cf98f0d54..d2c1fa6c48 100644
--- a/guix/graph.scm
+++ b/guix/graph.scm
@@ -1,5 +1,6 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015, 2016 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2016 Ricardo Wurmus <rekado@elephly.net>
;;;
;;; This file is part of GNU Guix.
;;;
@@ -41,6 +42,7 @@
node-transitive-edges
node-reachable-count
+ %graph-backends
%graphviz-backend
graph-backend?
graph-backend
@@ -179,6 +181,14 @@ typically returned by 'node-edges' or 'node-back-edges'."
emit-prologue emit-epilogue
emit-node emit-edge))
+
+;;;
+;;; Shared.
+;;;
+
+(define %graph-backends
+ (list %graphviz-backend))
+
(define* (export-graph sinks port
#:key
reverse-edges? node-type
diff --git a/guix/scripts/graph.scm b/guix/scripts/graph.scm
index 2f70d64c90..d96df5fbaf 100644
--- a/guix/scripts/graph.scm
+++ b/guix/scripts/graph.scm
@@ -337,6 +337,13 @@ substitutes."
%node-types)
(leave (_ "~a: unknown node type~%") name)))
+(define (lookup-backend name)
+ "Return the graph backend called NAME. Raise an error if it is not found."
+ (or (find (lambda (backend)
+ (string=? (graph-backend-name backend) name))
+ %graph-backends)
+ (leave (_ "~a: unknown backend~%") name)))
+
(define (list-node-types)
"Print the available node types along with their synopsis."
(display (_ "The available node types are:\n"))
@@ -347,6 +354,16 @@ substitutes."
(node-type-description type)))
%node-types))
+(define (list-backends)
+ "Print the available backends along with their synopsis."
+ (display (_ "The available backend types are:\n"))
+ (newline)
+ (for-each (lambda (backend)
+ (format #t " - ~a: ~a~%"
+ (graph-backend-name backend)
+ (graph-backend-description backend)))
+ %graph-backends))
+
;;;
;;; Command-line options.
@@ -361,6 +378,14 @@ substitutes."
(lambda (opt name arg result)
(list-node-types)
(exit 0)))
+ (option '(#\b "backend") #t #f
+ (lambda (opt name arg result)
+ (alist-cons 'backend (lookup-backend arg)
+ result)))
+ (option '("list-backends") #f #f
+ (lambda (opt name arg result)
+ (list-backends)
+ (exit 0)))
(option '(#\e "expression") #t #f
(lambda (opt name arg result)
(alist-cons 'expression arg result)))
@@ -378,6 +403,10 @@ substitutes."
(display (_ "Usage: guix graph PACKAGE...
Emit a Graphviz (dot) representation of the dependencies of PACKAGE...\n"))
(display (_ "
+ -b, --backend=TYPE produce a graph with the given backend TYPE"))
+ (display (_ "
+ --list-backends list the available graph backends"))
+ (display (_ "
-t, --type=TYPE represent nodes of the given TYPE"))
(display (_ "
--list-types list the available graph types"))
@@ -392,7 +421,8 @@ Emit a Graphviz (dot) representation of the dependencies of PACKAGE...\n"))
(show-bug-report-information))
(define %default-options
- `((node-type . ,%package-node-type)))
+ `((node-type . ,%package-node-type)
+ (backend . ,%graphviz-backend)))
;;;
@@ -407,6 +437,7 @@ Emit a Graphviz (dot) representation of the dependencies of PACKAGE...\n"))
(lambda (arg result)
(alist-cons 'argument arg result))
%default-options))
+ (backend (assoc-ref opts 'backend))
(type (assoc-ref opts 'node-type))
(items (filter-map (match-lambda
(('argument . (? store-path? item))
@@ -429,7 +460,8 @@ Emit a Graphviz (dot) representation of the dependencies of PACKAGE...\n"))
items)))
(export-graph (concatenate nodes)
(current-output-port)
- #:node-type type)))))))
+ #:node-type type
+ #:backend backend)))))))
#t)
;;; graph.scm ends here