diff options
Diffstat (limited to 'guix/scripts/graph.scm')
| -rw-r--r-- | guix/scripts/graph.scm | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/guix/scripts/graph.scm b/guix/scripts/graph.scm index 725ae42030..734a47719a 100644 --- a/guix/scripts/graph.scm +++ b/guix/scripts/graph.scm @@ -322,10 +322,12 @@ substitutes." (define* (export-graph sinks port #:key + reverse-edges? (node-type %package-node-type) (backend %graphviz-backend)) "Write to PORT the representation of the DAG with the given SINKS, using the -given BACKEND. Use NODE-TYPE to traverse the DAG." +given BACKEND. Use NODE-TYPE to traverse the DAG. When REVERSE-EDGES? is +true, draw reverse arrows." (match backend (($ <graph-backend> emit-prologue emit-epilogue emit-node emit-edge) (emit-prologue (node-type-name node-type) port) @@ -349,7 +351,9 @@ given BACKEND. Use NODE-TYPE to traverse the DAG." dependencies))) (emit-node id (node-label head) port) (for-each (lambda (dependency dependency-id) - (emit-edge id dependency-id port)) + (if reverse-edges? + (emit-edge dependency-id id port) + (emit-edge id dependency-id port))) dependencies ids) (loop (append dependencies tail) (set-insert id visited))))))))))))) |