nitdoc: add --no-dot to skip graph generation

Signed-off-by: Jean Privat <jean@pryen.org>

diff --git a/src/nitdoc.nit b/src/nitdoc.nit
index 691d951..23cf6b8 100644 (file)
--- a/src/nitdoc.nit
+++ b/src/nitdoc.nit
@@ -83,6 +83,7 @@ class DocContext
        readable var _opt_dir: OptionString = new OptionString("Directory where doc is generated", "-d", "--dir")
        readable var _opt_source: OptionString = new OptionString("What link for source (%f for filename, %l for first line, %L for last line)", "--source")
        readable var _opt_public: OptionBool = new OptionBool("Generate only the public API", "--public")
+       readable var _opt_nodot: OptionBool = new OptionBool("Do not generate graphes with graphviz", "--no-dot")
 
        fun public_only: Bool
        do
@@ -261,6 +262,7 @@ class DocContext
        # `name' must also match the name of the graph in the dot content (eg. digraph NAME {...)
        fun gen_dot(dot: String,  name: String, alt: String)
        do
+               if opt_nodot.value then return
                var f = new OFStream.open("{self.dir}/{name}.dot")
                f.write(dot)
                f.close
@@ -279,6 +281,7 @@ class DocContext
                option_context.add_option(opt_public)
                option_context.add_option(opt_dir)
                option_context.add_option(opt_source)
+               option_context.add_option(opt_nodot)
        end
 
        redef fun process_options
@@ -286,6 +289,15 @@ class DocContext
                super
                var d = opt_dir.value
                if d != null then dir = d
+
+               if not opt_nodot.value then
+                       # Test if dot is runable
+                       var res = sys.system("sh -c dot </dev/null >/dev/null 2>&1")
+                       if res != 0 then
+                               stderr.write "--no-dot implied since `dot' is not available. Try to install graphviz.\n"
+                               opt_nodot.value = true
+                       end
+               end
        end
 
        redef fun handle_property_conflict(lc, impls)