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Ocamldoc generates rotate=90 directive in dot file, which is not correct #7888

vicuna opened this Issue Dec 29, 2018 · 1 comment


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vicuna commented Dec 29, 2018

Original bug ID: 7888
Reporter: luc.bouge
Status: new
Resolution: open
Priority: normal
Severity: minor
Platform: Mac
OS: 10.14
Version: 4.07.1
Category: ocamldoc
Monitored by: @nojb

Bug description

I use ocamldoc 4.07.1+rc1.

I use it to generate a dependency graph for a set of modules, with the following command

ocamldoc -warn-error -I _build -dot *.ml -o
dot -Tpdf > graph.pdf

The generated dot file starts with:

digraph G {
rankdir = TB ;

However, the dot directive "rotate=90;" is not working on MacOS 10.14. With this directive, dot generates a blank page. See

Without the directive, it works perfectly.

Steps to reproduce

I join the file, as generated below.

$ ocamldoc --version

$ ocamldoc -warn-error -I _build -dot *.ml -o

$ ls -la
-rw-r--r--@ 1 bouge staff 1934 29 déc 11:02

$ dot -Tpdf > graph.pdf

$ ls -la graph.pdf
-rw-r--r--@ 1 bouge staff 22539 29 déc 11:04 graph.pdf

$ open graph.pdf
--> Blank page

Additional information

You can test out this behavior of dot with this file:

$ more
digraph G {
"a" -> "b";

$ dot -Tpdf > test.pdf

$ open test.pdf
--> Blank page

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vicuna commented Jan 9, 2019

Comment author: @Octachron

Is there a more conclusive indication that "rotate=90" is not correct? It seems valid according to graphviz grammar description and it works on at least one implementation. We could maybe add a bare option to ocamldoc dot output, but it would still require some manual hand editing.

@vicuna vicuna added the ocamldoc label Mar 14, 2019

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