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Print results only if non-nil, during eval

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This commit is contained in:
joeduffy 2017-03-09 15:45:24 +00:00
parent bfee271087
commit cbf5407a53
1 changed files with 3 additions and 4 deletions
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7
cmd/pack_eval.go
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@ -32,18 +32,17 @@ func newPackEvalCmd() *cobra.Command {
"a path to a package elsewhere can be provided as the [package] argument.",
Run: runFunc(func(cmd *cobra.Command, args []string) error {
// Perform the compilation and, if non-nil is returned, output the graph.
if result := compile(cmd, args, nil); result != nil {
if result := compile(cmd, args, nil); result != nil && result.Heap != nil && result.Heap.G != nil {
// Serialize that evaluation graph so that it's suitable for printing/serializing.
g := result.Heap.G
if dotOutput {
// Convert the output to a DOT file.
if err := dotconv.Print(g, os.Stdout); err != nil {
if err := dotconv.Print(result.Heap.G, os.Stdout); err != nil {
return fmt.Errorf("failed to write DOT file to output: %v", err)
}
} else {
// Just print a very basic, yet (hopefully) aesthetically pleasinge, ascii-ization of the graph.
shown := make(map[graph.Vertex]bool)
for _, root := range g.Objs() {
for _, root := range result.Heap.G.Objs() {
printVertex(root.ToObj(), shown, "")
}
}