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authorRoel Janssen <roel@gnu.org>2017-05-11 16:17:49 +0200
committerRoel Janssen <roel@gnu.org>2017-05-11 16:17:49 +0200
commit5899fafbfefcd7682aec8f2caaaad3add678a3c4 (patch)
treeb2d4ceca726fbb5adf348bcb951833e08727584f /guix/graph.scm
parent70cb7610ca7de51da6ad7f84ff3c02258ec4e95f (diff)
graph: Add Cypher backend.
* guix/graph.scm (%cypher-backend): New variable. * doc/guix.texi: Add documentation for the Cypher backend of 'guix graph'.
Diffstat (limited to 'guix/graph.scm')
-rw-r--r--guix/graph.scm32
1 files changed, 31 insertions, 1 deletions
diff --git a/guix/graph.scm b/guix/graph.scm
index 7af2cd3b80..d7fd5f3e4b 100644
--- a/guix/graph.scm
+++ b/guix/graph.scm
@@ -229,6 +229,35 @@ nodeArray.push(nodes[\"~a\"]);~%"
emit-d3js-prologue emit-d3js-epilogue
emit-d3js-node emit-d3js-edge))
+
+
+;;;
+;;; Cypher export.
+;;;
+
+(define (emit-cypher-prologue name port)
+ (format port ""))
+
+(define (emit-cypher-epilogue port)
+ (format port ""))
+
+(define (emit-cypher-node id label port)
+ (format port "MERGE (p:Package { id: ~s }) SET p.name = ~s;~%"
+ id label ))
+
+(define (emit-cypher-edge id1 id2 port)
+ (format port "MERGE (a:Package { id: ~s });~%" id1)
+ (format port "MERGE (b:Package { id: ~s });~%" id2)
+ (format port "MATCH (a:Package { id: ~s }), (b:Package { id: ~s }) CREATE UNIQUE (a)-[:NEEDS]->(b);~%"
+ id1 id2))
+
+(define %cypher-backend
+ (graph-backend "cypher"
+ "Generate Cypher queries."
+ emit-cypher-prologue emit-cypher-epilogue
+ emit-cypher-node emit-cypher-edge))
+
+
;;;
;;; Shared.
@@ -236,7 +265,8 @@ nodeArray.push(nodes[\"~a\"]);~%"
(define %graph-backends
(list %graphviz-backend
- %d3js-backend))
+ %d3js-backend
+ %cypher-backend))
(define* (export-graph sinks port
#:key