Commit Graph

8 Commits

Author SHA1 Message Date
James Bardin de0cb17a39 Add Graph.DebugOperation
The method marks the start of a set of operations on the Graph, with
extra information optionally provided in the second paramter. This
returns a function with a single End method to mark the end of the set
in the logs.

Refactor the existing graph Begin/End Operation calls to use this single
method. Remove the *string types in the marshal structs, these are
strictly informational and don't need to differentiate empty vs unset
strings.

Add calls to DebugOperation for each step while building the graph.
2016-11-14 12:47:51 -05:00
James Bardin 7e66df3290 Rename annotation methods
Change AnnotateVertex and AnnotateEdge to VertexDebugInfo EdgeDebugInfo
to avoid confusion between debug output and future graph annotations.
2016-11-14 11:06:52 -05:00
James Bardin 7bbd6bfbd7 Add methods to annotate Graph vertices and edges
The AnnotateVertex and AnnotateEdge Graph methods will allow terraform
to insert arbitray information into the encoded graph stream for later
processing.
2016-11-14 08:52:18 -05:00
James Bardin 82b1a2abc2 Add graph transformation recording
The external api provided here is simply
dag.Graph.SetDebugWriter(io.Writer). When a writer is provided to a
Graph, it will immediately encode itself to the stream, and subsequently
encode any additional transformations to the graph. This will allow
easier logging of graph transformations without writing complete graphs
to the logs at every step. Since the marshalGraph can also be dot
encoded, this will allow translation from the JSON logs to dot graphs.
2016-11-14 08:50:34 -05:00
James Bardin 6f347ebb3a Remove dot package
Unify all dot functionality in the dag package
2016-11-14 08:50:34 -05:00
James Bardin 8a5d71b0ac Implement dag.GraphNodeDotter (temporarily)
To maintain the same output, the Graph.Dot implementation needs to be
aware of GraphNodeDotter. Copy the interface into the dag package, and
make the Dot marshaler aware of which nodes implemented the interface.
This way we can remove most of the remaining dot code from terraform.
2016-11-14 08:50:34 -05:00
James Bardin 7b774f771b implement dag.Subgrapher interface
This allows the dag package to detect subgraphs, even when impelemnted
by types from other packages
2016-11-14 08:50:34 -05:00
James Bardin 28d406c040 Provider a marshaler for dag.Graph
The dot format generation was done with a mix of code from the terraform
package and the dot package. Unify the dot generation code, and it into
the dag package.

Use an intermediate structure to allow a dag.Graph to marshal itself
directly. This structure will be ablt to marshal directly to JSON, or be
translated to dot format. This was we can record more information about
the graph in the debug logs, and provide a way to translate those logged
structures to dot, which is convenient for viewing the graphs.
2016-11-14 08:50:33 -05:00